CA2078920A1 - Birthing bed adjustable to trendelenburg position - Google Patents
Birthing bed adjustable to trendelenburg positionInfo
- Publication number
- CA2078920A1 CA2078920A1 CA002078920A CA2078920A CA2078920A1 CA 2078920 A1 CA2078920 A1 CA 2078920A1 CA 002078920 A CA002078920 A CA 002078920A CA 2078920 A CA2078920 A CA 2078920A CA 2078920 A1 CA2078920 A1 CA 2078920A1
- Authority
- CA
- Canada
- Prior art keywords
- main frame
- bed
- frame
- intermediate frame
- valve
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
Links
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61G—TRANSPORT, PERSONAL CONVEYANCES, OR ACCOMMODATION SPECIALLY ADAPTED FOR PATIENTS OR DISABLED PERSONS; OPERATING TABLES OR CHAIRS; CHAIRS FOR DENTISTRY; FUNERAL DEVICES
- A61G13/00—Operating tables; Auxiliary appliances therefor
- A61G13/0009—Obstetrical tables or delivery beds
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61G—TRANSPORT, PERSONAL CONVEYANCES, OR ACCOMMODATION SPECIALLY ADAPTED FOR PATIENTS OR DISABLED PERSONS; OPERATING TABLES OR CHAIRS; CHAIRS FOR DENTISTRY; FUNERAL DEVICES
- A61G7/00—Beds specially adapted for nursing; Devices for lifting patients or disabled persons
- A61G7/002—Beds specially adapted for nursing; Devices for lifting patients or disabled persons having adjustable mattress frame
- A61G7/005—Beds specially adapted for nursing; Devices for lifting patients or disabled persons having adjustable mattress frame tiltable around transverse horizontal axis, e.g. for Trendelenburg position
Abstract
Birthing Bed Adjustable to Trendelenburg Position ABSTRACT OF THE DISCLOSURE
A birthing bed has a base, an intermediate frame mounted on the base with a power-actuated linkage to raise and lower the intermediate frame with respect to the base. A main frame is pivotably mounted on the intermediate frame so that it can be shifted from a horizontal position to an inclined Trendelenburg posi-tion. The intermediate frame is adapted to be lowered to bring the patient support surface to a very low level. In that level, the bed can be shifted to a Trendelenburg position with limit switches causing the intermediate frame to rise in order to accommodate the shift of the main frame to the inclined Trendelenburg position.
A birthing bed has a base, an intermediate frame mounted on the base with a power-actuated linkage to raise and lower the intermediate frame with respect to the base. A main frame is pivotably mounted on the intermediate frame so that it can be shifted from a horizontal position to an inclined Trendelenburg posi-tion. The intermediate frame is adapted to be lowered to bring the patient support surface to a very low level. In that level, the bed can be shifted to a Trendelenburg position with limit switches causing the intermediate frame to rise in order to accommodate the shift of the main frame to the inclined Trendelenburg position.
Description
2~7~9~
Birthin~ Bed Adiustable to Trendslenburq Position This invention relates to a hospital bed and more particularly to a birthing bed having a patient support surface that can be shifted to a Trendelenburg position.
A conventional birthing bed has a height to the top of the mattress of as low as 25 inches but can be raised to a height of up to 46 inches. A principal objective of the present invention has been to reduce the height of the bed to about 22 inches, the patient support panels being at a height of abo,ut 18 inches and the mattress being about 4 inches thick. This is an ideal height for a mother about to give birth, for it enables the mother to get in and out of the bed very easily as the mother will frequently wish to do during the laboring process.
It is important for the bed to have the capability of shifting to a Trendelenburg position, that is, a position in which the patient support surface is inclined with the head lowered below the foot end. The Trendelenburg position is important for the patient's well being when she is undergoing cardiac arrest.
2 ~ r4~
Further, the position is useful in slowing the birthing process if the baby is coming too fast.
The two features, low bed level and Trendel-enburg position, are somewhat inconsistent in that when the support surface is at its lowest level, the floor of the hospital room creates an obstruction to the shifting of the support surface to the inclined Trendelenburg position at any height.
SUMMARY OF THE INVENTION
It has been an objective of the present invention to provide a birthing bed having a low patient support surface and having additionally the capability of shifting into a full Trendelenburg position.
This objective of the present invention is lS attained by providing a base, an intermediate frame mounted on the base with a power-operated parallelogram linkage connecting the base to the intermediate frame and permitting the intermediate frame to be raised and lowered. A main frame is mounted on the intermediate frame on a pivot axis approximately centered between the two ends of the bed. A valve-operated gas spring normally maintains the bed in its horizontal attitude but is adapted to be released to permit the main frame to be pivoted to the Trendelenburg position. The power system for raising the intermediate frame includes limit switches that are triggered by the combined positioning of the intermediate frame and the pivoting of the main frame to the Trendelenburg position so that when the bed 2 ~
is in its lowest position and the main frame begins to pivot to the Trendelenburg position, the power system for the intermediate frame will raise the intermediate frame in order to permit the bed to accommodate the shift to full Trendelenburg position.
Another feature of the invention is the provision of a notch in the intermediate frame that permits the intermediate frame and with it the patient support surface to be lowered to the 22 inch level.
Another feature of the invention is the provision of a depending bar mounted on the main frame having a wheel at its lower end to provide a rolling engagement of the main frame with the floor when the bed is shifted to the Trendelenburg position.
Another objective of the present invention has been to provide improved hand controls for pivoting the main frame into and out of the Trendelenburg position.
This objective of the present invention has been at-tained by providing a main frame pivoted approximately at its center and supported at one end by a pneumatic spring having a valve in its piston. A handle is mounted on each side of the main frame and connected to a common axle. The axle has a valve-operating mechanism connected to it so as to open the valve in the gas spring when the handle is pushed downwardly to move the main frame to the Trendelenburg position and when the 2û7~
~4--handle is pulled upwardly to raise the main frame to the normal horizontal position.
Another feature of the invention has been to provide a footrest having a parallelogram linkage 5 mounting it to the intermediate frame and a foot end drive that is pivoted off the same pivot bar that mounts the main frame to the intermediate frame.
The several features and objectives of the present invention will become more readily apparent by referring to the accompanying drawings in which:
Fig. 1 is a perspective view of a birthing bed employing the present invention;
Fig. 2 is a fragmentary side elevational view, partly in se~tion, of the birthing bed of the present invention;
Fig. 3 is a side elevational view similar to Fig. 2 with some detail omitted showinq the bed at its lowered position;
Fig. 3A is a side elevational view similar to Fig. 3 showing the bed partially changed to a Trendelen-burg position;
Fig. 3B is a side elevational view similar to Fig. l showing the bed in full Trendelenburg position;
Fig. 4 is a top plan view of the bed with the patient support panels and some other mechanism removed for clarity;
`` 2078~20 Fi.g. 5 is a side elevational view partly in section illustrating the pneumatic spring and Trendelen-burg operating mechanism.
DETAILED DESCRIPTION OF THE INVENTION
A hospital bed and specifically a birthing bed 10 is shown in Figs. 1 and 2. It has a base 11 wi~h casters 12 providing a rolling support. An intermediatP
frame 15 is supported on the base ll by a parallelogram linkage 16. A main frame 18 has a plvot shaft 19 connecting it to the intermediate frame 15. A gas sprinq 20 connects the head end of the main frame to the intermediate frame and normally maintains the main frame in a horizontal attitude.
A head panel 21~ a seat panel 22 and a foot-rest 23 are mounted on the main frame 18 and form a deckthat is about 18 inches above ground level when the main frame is in its lowermost position (Fig. 3). A four inch thick mattress 24 covers the panels 21, 22 and 23.
The head panel 21 is on the main frame so that it can be pivoted into an upwardly inclined position, as shown in Fig. l. The footrest is mounted by a parallelogram linkage 30 to the intermediate frame (Fig. 2). A
bellcrank lever 31 pivoted on the main frame pivot shaft 19 is connected by a drive link 32 to the footrest. The bellcrank lever is also connected to a piston and cylinder 33 adapted to raise and lower the footrest 23.
The base has a transverse beam 35 intercon-necting longitudinal rails 36. The beam 35 is a primary ~8~
structural element tying the longitudin~l rails 36 together to form the base. The intermediate frame 15 has a pair of spaced, longitudinal members 37 which are notched at 38 to provide a recess that receives the transverse beam 35 when the intermediate frame is in its lowermost position, as depicted in Figs. 3 and 3A.
Each link 39 in the parallelogram linkage 16 is connected at its upper end to a sha~t 40. Each shaft is journalled in the intermediate frame 15. Each shaft 40 has a lever 41 fixed to it. The two levers 41 are pivoted at 42 to a longitudinal rod 43 that causes the shafts 40 to rotate together. One of the shafts 40 has a lever 45 fixed to it. The lever 45 is fixed to an internally-threaded tube ~6, the threaded tube being threaded onto the screw 47 of a ball-screw driver con-nected via a gear box 48 to a motor 49. Rotation of the motor in one direction rotates the screw 47, driving tube 46 linearly to cause the lever 45 to rotate, thereby causing the parallelogram linkage 16 to swing downwardly. Rotation of the motor 48 in the opposite direction causes the parallelogram linkage 16 to swing upwardly to its maximum height as depicted in Fig. 2.
An optical position sensor 50 has a rod 51 fixed by a bracket 52 to the tube 46. The rod 51 pr~jects into an optical position sensor box 55 having multiple positions A, B, C, D and E. Each position has a light source beaming across the box to a photocell.
When the rod end crosses any of the positions A-E, the 2~7~20 light is blocked, thereby indicating the position of the rod within the bo~ 55, but more particularly, the vertical position of the intermediate frame 15 with respect to the base 11.
The pneumatic spring 20 normally maintains the main frame 18 in horizontal attitude with respect to the intermediate frame 15. The mechanism for contracting the pneumatic spring 20 and shifting to a Trendelenburg position wherein the head end of the bed is lowered below the foot end is best illustrated in Fig. 5 taken in conjunction with Figs. 3 - 3B.
The pneumatic spring 20 has a cylinder 60 within which a piston 61 slides. The piston 61 is mounted on a rod 62. The rod 62 is threaded onto a gas head 63 whose end 64 is anchored to the main frame by a pivot bolt 65. The piston rod is hollow and has a valve seat 66 at its inner end. A valve 67 is mounted on the seat and is connected by a rod 68 loosely slidable in the piston rod 62. The rod 68 has a head 70 which, when pressed, will cause the valve 67 to move off its seat 66 and permit air to flow from one side of the piston to the other as is conventional with gas springs. See, for example, the BLOC-O-LIFT T~ gas spring manufactured by Gas Spring Company of Colmar, Pennsylvania.
A valve operation lever 71 is pivoted at 72 to a follower 73. The lever 71 is also connected by a pivot pin 74 to the gas head 63. A stop lever 75 is pivoted to the bolt 65 and is connected by a tension .... .
2~78~20 spring 76 to the lever 71. Tension spring 76 holds the lever 71 away from the rod head 70.
A hexagonal shaft 80 extends transversely across the main frame 18. It is connected to operating levers or handles 81 on each side of the main frame.
When either operating lever is pulled upwardly, the main frame can be pivoted upwardly. When either operating lever is pushed downwardly, the main frame will pivot downwardly into the Trendelenburg position. The shaft 80 is fixed to a cam 83. Cam 83 is disposed within a rectangular opening 84 in the follower 73. The cam 83 has an upper surface 85 and a lower surface 86, each of which is engageable with a vertical surface 87 on the foliower. If the cam is rotated either clockwise or counterclockwise, a respective cam surface will push the follower toward the right as viewed in Fig. 5. That movement will pivot the valve operator lever 71 and cause it to contact head 70 to push the valve rod 68 inwardly, thereby permitting gas to flow around valve 67 from one side to the other of the piston 61 and thereby permitting the main frame to pivot up or down with respect to the intermediate frame.
Two depending levers 90 are mounted on the shaft ~0, one on each side of the Trendelenburg ~top lever~75. A stop pin 91 is moùnted on the depending lever 90 and rides in a slot 92 in the Trendelenburg stop lever. The pin and slot limits the pivoting 2 ~ a movement of the shaft 80 and hence the swinging movement of the operating levers 81.
A position-sensing limit switch 95 is mounted on the gas head 63 and is engageable by edge 97 of the cylinder 60 of the gas spring 20 to close a clrcuit when the main frame has pivoted a predetermined distance toward the Trendelenburg position (Fig. 3A). A
circuit-actuating limit swi~ch 96 is also mounted to the gas head 63 and is positioned to be closed by valve lever 71 when the handle 81 is rotated to lower the head end into a Trendelenburg attitude. When the handle 81 is released, the circuit is interrupted. A control circuit 100 is connected to the limit switch 95 and is connected to the photoelectric cells A, B, C, D and E in the control box 55 to control the operation o~` the bed.
A depending strut 105 has its upper end 106 fixed centrally to the head end of the main frame and has a floor-engaging wheel 107 at its lower end. The wheel and strut limit the downward swinging of the main frame when the main frame and intermediate frame are in the lower position with respect to the base, as depicted in Figs. 3 - 3B.
In the operation of the invention, a control panel 110 ~Fig. 1), connected to the control circuit 100 is operated to lower the intermediate frame to its lowermost position depicted in Fig. 3. When it is desired to go to the Trendelenburg position, either lever 81 is depressed to physically push the main frame - 207~20 to pivot it about its transverse pivot shaft lg. The pushing on the lever 81 rotates the hexagonal shaft 80, thereby swinging the follower 73 to the right as depict-ed in Fig. 5. That in turns swings the lever 71 about its pivot point 74 and opens the valve in ~as spring 20 while simultaneously closing switch 96. Switch 96 energizes the circuit loO to raise the bed as the head end is lowered. Raising will continue until sensor ~ is blocked. The resistance to the downward swinging movement of the head end of the main frame with respect to the intermediate frame is relieved by the activation of the gas spring and the nurse can lower the main frame.
In this lowermost position, the intermediate frame will permit only the limited Trendelenburg posi-tion (Fig. 3A) and will not permit the main frame to go into a full Trendelenbur~ position (Fig. 3B). Just as the wheel 107 of the strut 105 engages the ground, the limit switch 95 is closed. since the optical switch is also closed, indicating that the intermediate frame needs to be raised, the control circuit will energize the motor 48 to cause the intermediate frame to rise.
While the intermediate frame is rising, the nurse is pushing down on the main frame by pushing down on the lever 81. This keeps the wheel 107 of the strut 105 in engagement with the floor and it rolls along the floor as depicted by comparing Figs. 3A to 3B. The rolling on the floor takes place simultaneously with the rising of 2078~0 the intermediate frame until the full Trendelenburg position is achieved, as depicted in Fig. 3B. At that point, the rod 51 closes photocell c on the box 55, indicating that a sufficient height of the intermediate frame has been achieved to permit the full Trendelenburg position. The motor 48 is then deeneryized.
To return the main frame to a horizontal position, a handle 81, on either side of the bed, is lifted. As explained above, that will open the valve in the gas spring and permit the head end of the main frame to be raised.
From the foregoing, it can be sePn that the main frame can be pivoted in either direction by a nurse operating a handle 81 on either side of the bed.
Further, if the bed is without power to raise the intermediate frame, the main frame can be pivoted to a partial Trendelenburg position as limited by the strut 105 and wheel 107 engaging the floor.
From the above disclosure of the general principles of the present invention and the preceding detailed description of a preferred embodiment, those skilled in the art will readily comprehend the various modifications to which the present invention is susceptible~ Therefore, we desire to be limited only by the scope of the following claims and equivalents thereof:
We clai~n:
Birthin~ Bed Adiustable to Trendslenburq Position This invention relates to a hospital bed and more particularly to a birthing bed having a patient support surface that can be shifted to a Trendelenburg position.
A conventional birthing bed has a height to the top of the mattress of as low as 25 inches but can be raised to a height of up to 46 inches. A principal objective of the present invention has been to reduce the height of the bed to about 22 inches, the patient support panels being at a height of abo,ut 18 inches and the mattress being about 4 inches thick. This is an ideal height for a mother about to give birth, for it enables the mother to get in and out of the bed very easily as the mother will frequently wish to do during the laboring process.
It is important for the bed to have the capability of shifting to a Trendelenburg position, that is, a position in which the patient support surface is inclined with the head lowered below the foot end. The Trendelenburg position is important for the patient's well being when she is undergoing cardiac arrest.
2 ~ r4~
Further, the position is useful in slowing the birthing process if the baby is coming too fast.
The two features, low bed level and Trendel-enburg position, are somewhat inconsistent in that when the support surface is at its lowest level, the floor of the hospital room creates an obstruction to the shifting of the support surface to the inclined Trendelenburg position at any height.
SUMMARY OF THE INVENTION
It has been an objective of the present invention to provide a birthing bed having a low patient support surface and having additionally the capability of shifting into a full Trendelenburg position.
This objective of the present invention is lS attained by providing a base, an intermediate frame mounted on the base with a power-operated parallelogram linkage connecting the base to the intermediate frame and permitting the intermediate frame to be raised and lowered. A main frame is mounted on the intermediate frame on a pivot axis approximately centered between the two ends of the bed. A valve-operated gas spring normally maintains the bed in its horizontal attitude but is adapted to be released to permit the main frame to be pivoted to the Trendelenburg position. The power system for raising the intermediate frame includes limit switches that are triggered by the combined positioning of the intermediate frame and the pivoting of the main frame to the Trendelenburg position so that when the bed 2 ~
is in its lowest position and the main frame begins to pivot to the Trendelenburg position, the power system for the intermediate frame will raise the intermediate frame in order to permit the bed to accommodate the shift to full Trendelenburg position.
Another feature of the invention is the provision of a notch in the intermediate frame that permits the intermediate frame and with it the patient support surface to be lowered to the 22 inch level.
Another feature of the invention is the provision of a depending bar mounted on the main frame having a wheel at its lower end to provide a rolling engagement of the main frame with the floor when the bed is shifted to the Trendelenburg position.
Another objective of the present invention has been to provide improved hand controls for pivoting the main frame into and out of the Trendelenburg position.
This objective of the present invention has been at-tained by providing a main frame pivoted approximately at its center and supported at one end by a pneumatic spring having a valve in its piston. A handle is mounted on each side of the main frame and connected to a common axle. The axle has a valve-operating mechanism connected to it so as to open the valve in the gas spring when the handle is pushed downwardly to move the main frame to the Trendelenburg position and when the 2û7~
~4--handle is pulled upwardly to raise the main frame to the normal horizontal position.
Another feature of the invention has been to provide a footrest having a parallelogram linkage 5 mounting it to the intermediate frame and a foot end drive that is pivoted off the same pivot bar that mounts the main frame to the intermediate frame.
The several features and objectives of the present invention will become more readily apparent by referring to the accompanying drawings in which:
Fig. 1 is a perspective view of a birthing bed employing the present invention;
Fig. 2 is a fragmentary side elevational view, partly in se~tion, of the birthing bed of the present invention;
Fig. 3 is a side elevational view similar to Fig. 2 with some detail omitted showinq the bed at its lowered position;
Fig. 3A is a side elevational view similar to Fig. 3 showing the bed partially changed to a Trendelen-burg position;
Fig. 3B is a side elevational view similar to Fig. l showing the bed in full Trendelenburg position;
Fig. 4 is a top plan view of the bed with the patient support panels and some other mechanism removed for clarity;
`` 2078~20 Fi.g. 5 is a side elevational view partly in section illustrating the pneumatic spring and Trendelen-burg operating mechanism.
DETAILED DESCRIPTION OF THE INVENTION
A hospital bed and specifically a birthing bed 10 is shown in Figs. 1 and 2. It has a base 11 wi~h casters 12 providing a rolling support. An intermediatP
frame 15 is supported on the base ll by a parallelogram linkage 16. A main frame 18 has a plvot shaft 19 connecting it to the intermediate frame 15. A gas sprinq 20 connects the head end of the main frame to the intermediate frame and normally maintains the main frame in a horizontal attitude.
A head panel 21~ a seat panel 22 and a foot-rest 23 are mounted on the main frame 18 and form a deckthat is about 18 inches above ground level when the main frame is in its lowermost position (Fig. 3). A four inch thick mattress 24 covers the panels 21, 22 and 23.
The head panel 21 is on the main frame so that it can be pivoted into an upwardly inclined position, as shown in Fig. l. The footrest is mounted by a parallelogram linkage 30 to the intermediate frame (Fig. 2). A
bellcrank lever 31 pivoted on the main frame pivot shaft 19 is connected by a drive link 32 to the footrest. The bellcrank lever is also connected to a piston and cylinder 33 adapted to raise and lower the footrest 23.
The base has a transverse beam 35 intercon-necting longitudinal rails 36. The beam 35 is a primary ~8~
structural element tying the longitudin~l rails 36 together to form the base. The intermediate frame 15 has a pair of spaced, longitudinal members 37 which are notched at 38 to provide a recess that receives the transverse beam 35 when the intermediate frame is in its lowermost position, as depicted in Figs. 3 and 3A.
Each link 39 in the parallelogram linkage 16 is connected at its upper end to a sha~t 40. Each shaft is journalled in the intermediate frame 15. Each shaft 40 has a lever 41 fixed to it. The two levers 41 are pivoted at 42 to a longitudinal rod 43 that causes the shafts 40 to rotate together. One of the shafts 40 has a lever 45 fixed to it. The lever 45 is fixed to an internally-threaded tube ~6, the threaded tube being threaded onto the screw 47 of a ball-screw driver con-nected via a gear box 48 to a motor 49. Rotation of the motor in one direction rotates the screw 47, driving tube 46 linearly to cause the lever 45 to rotate, thereby causing the parallelogram linkage 16 to swing downwardly. Rotation of the motor 48 in the opposite direction causes the parallelogram linkage 16 to swing upwardly to its maximum height as depicted in Fig. 2.
An optical position sensor 50 has a rod 51 fixed by a bracket 52 to the tube 46. The rod 51 pr~jects into an optical position sensor box 55 having multiple positions A, B, C, D and E. Each position has a light source beaming across the box to a photocell.
When the rod end crosses any of the positions A-E, the 2~7~20 light is blocked, thereby indicating the position of the rod within the bo~ 55, but more particularly, the vertical position of the intermediate frame 15 with respect to the base 11.
The pneumatic spring 20 normally maintains the main frame 18 in horizontal attitude with respect to the intermediate frame 15. The mechanism for contracting the pneumatic spring 20 and shifting to a Trendelenburg position wherein the head end of the bed is lowered below the foot end is best illustrated in Fig. 5 taken in conjunction with Figs. 3 - 3B.
The pneumatic spring 20 has a cylinder 60 within which a piston 61 slides. The piston 61 is mounted on a rod 62. The rod 62 is threaded onto a gas head 63 whose end 64 is anchored to the main frame by a pivot bolt 65. The piston rod is hollow and has a valve seat 66 at its inner end. A valve 67 is mounted on the seat and is connected by a rod 68 loosely slidable in the piston rod 62. The rod 68 has a head 70 which, when pressed, will cause the valve 67 to move off its seat 66 and permit air to flow from one side of the piston to the other as is conventional with gas springs. See, for example, the BLOC-O-LIFT T~ gas spring manufactured by Gas Spring Company of Colmar, Pennsylvania.
A valve operation lever 71 is pivoted at 72 to a follower 73. The lever 71 is also connected by a pivot pin 74 to the gas head 63. A stop lever 75 is pivoted to the bolt 65 and is connected by a tension .... .
2~78~20 spring 76 to the lever 71. Tension spring 76 holds the lever 71 away from the rod head 70.
A hexagonal shaft 80 extends transversely across the main frame 18. It is connected to operating levers or handles 81 on each side of the main frame.
When either operating lever is pulled upwardly, the main frame can be pivoted upwardly. When either operating lever is pushed downwardly, the main frame will pivot downwardly into the Trendelenburg position. The shaft 80 is fixed to a cam 83. Cam 83 is disposed within a rectangular opening 84 in the follower 73. The cam 83 has an upper surface 85 and a lower surface 86, each of which is engageable with a vertical surface 87 on the foliower. If the cam is rotated either clockwise or counterclockwise, a respective cam surface will push the follower toward the right as viewed in Fig. 5. That movement will pivot the valve operator lever 71 and cause it to contact head 70 to push the valve rod 68 inwardly, thereby permitting gas to flow around valve 67 from one side to the other of the piston 61 and thereby permitting the main frame to pivot up or down with respect to the intermediate frame.
Two depending levers 90 are mounted on the shaft ~0, one on each side of the Trendelenburg ~top lever~75. A stop pin 91 is moùnted on the depending lever 90 and rides in a slot 92 in the Trendelenburg stop lever. The pin and slot limits the pivoting 2 ~ a movement of the shaft 80 and hence the swinging movement of the operating levers 81.
A position-sensing limit switch 95 is mounted on the gas head 63 and is engageable by edge 97 of the cylinder 60 of the gas spring 20 to close a clrcuit when the main frame has pivoted a predetermined distance toward the Trendelenburg position (Fig. 3A). A
circuit-actuating limit swi~ch 96 is also mounted to the gas head 63 and is positioned to be closed by valve lever 71 when the handle 81 is rotated to lower the head end into a Trendelenburg attitude. When the handle 81 is released, the circuit is interrupted. A control circuit 100 is connected to the limit switch 95 and is connected to the photoelectric cells A, B, C, D and E in the control box 55 to control the operation o~` the bed.
A depending strut 105 has its upper end 106 fixed centrally to the head end of the main frame and has a floor-engaging wheel 107 at its lower end. The wheel and strut limit the downward swinging of the main frame when the main frame and intermediate frame are in the lower position with respect to the base, as depicted in Figs. 3 - 3B.
In the operation of the invention, a control panel 110 ~Fig. 1), connected to the control circuit 100 is operated to lower the intermediate frame to its lowermost position depicted in Fig. 3. When it is desired to go to the Trendelenburg position, either lever 81 is depressed to physically push the main frame - 207~20 to pivot it about its transverse pivot shaft lg. The pushing on the lever 81 rotates the hexagonal shaft 80, thereby swinging the follower 73 to the right as depict-ed in Fig. 5. That in turns swings the lever 71 about its pivot point 74 and opens the valve in ~as spring 20 while simultaneously closing switch 96. Switch 96 energizes the circuit loO to raise the bed as the head end is lowered. Raising will continue until sensor ~ is blocked. The resistance to the downward swinging movement of the head end of the main frame with respect to the intermediate frame is relieved by the activation of the gas spring and the nurse can lower the main frame.
In this lowermost position, the intermediate frame will permit only the limited Trendelenburg posi-tion (Fig. 3A) and will not permit the main frame to go into a full Trendelenbur~ position (Fig. 3B). Just as the wheel 107 of the strut 105 engages the ground, the limit switch 95 is closed. since the optical switch is also closed, indicating that the intermediate frame needs to be raised, the control circuit will energize the motor 48 to cause the intermediate frame to rise.
While the intermediate frame is rising, the nurse is pushing down on the main frame by pushing down on the lever 81. This keeps the wheel 107 of the strut 105 in engagement with the floor and it rolls along the floor as depicted by comparing Figs. 3A to 3B. The rolling on the floor takes place simultaneously with the rising of 2078~0 the intermediate frame until the full Trendelenburg position is achieved, as depicted in Fig. 3B. At that point, the rod 51 closes photocell c on the box 55, indicating that a sufficient height of the intermediate frame has been achieved to permit the full Trendelenburg position. The motor 48 is then deeneryized.
To return the main frame to a horizontal position, a handle 81, on either side of the bed, is lifted. As explained above, that will open the valve in the gas spring and permit the head end of the main frame to be raised.
From the foregoing, it can be sePn that the main frame can be pivoted in either direction by a nurse operating a handle 81 on either side of the bed.
Further, if the bed is without power to raise the intermediate frame, the main frame can be pivoted to a partial Trendelenburg position as limited by the strut 105 and wheel 107 engaging the floor.
From the above disclosure of the general principles of the present invention and the preceding detailed description of a preferred embodiment, those skilled in the art will readily comprehend the various modifications to which the present invention is susceptible~ Therefore, we desire to be limited only by the scope of the following claims and equivalents thereof:
We clai~n:
Claims (9)
1. A hospital bed comprising:
a base, an intermediate frame, a linkage mounting said intermediate frame on said base, power means for raising and lowering said intermediate frame with respect to said base, a main frame having a foot end and a head end, said main frame being pivotally mounted to said intermediate frame on a transverse axis, means for pivoting the head end of said main frame below said foot end to achieve a Trendelenburg position, and control means for operating said power means to raise said intermediate frame to permit full pivoting of said main frame.
a base, an intermediate frame, a linkage mounting said intermediate frame on said base, power means for raising and lowering said intermediate frame with respect to said base, a main frame having a foot end and a head end, said main frame being pivotally mounted to said intermediate frame on a transverse axis, means for pivoting the head end of said main frame below said foot end to achieve a Trendelenburg position, and control means for operating said power means to raise said intermediate frame to permit full pivoting of said main frame.
2. A hospital bed as in claim 1 further com-prising patient support panels forming a deck on said main frame, said deck being about 18 inches above a floor supporting said bed when said intermediate frame is in its lowermost position.
3. A hospital bed as in claim 2 further com-prising:
a transverse brace forming part of said base, said intermediate frame having a downwardly-facing notch that receives said brace when said inter-mediate frame is in its lowermost position.
a transverse brace forming part of said base, said intermediate frame having a downwardly-facing notch that receives said brace when said inter-mediate frame is in its lowermost position.
4. A hospital bed as in claim 1 further com-prising:
a strut projecting downwardly from the head end of said main frame, at least one auxiliary wheel mounted on said strut, said wheel being engageable with the floor supporting said bed when said main frame is pivoted to Trendelenburg position and said intermediate frame has been moved to its lowermost position, thereby swinging said main frame forward as said wheels roll on the floor to prevent the main frame crashing against the floor.
a strut projecting downwardly from the head end of said main frame, at least one auxiliary wheel mounted on said strut, said wheel being engageable with the floor supporting said bed when said main frame is pivoted to Trendelenburg position and said intermediate frame has been moved to its lowermost position, thereby swinging said main frame forward as said wheels roll on the floor to prevent the main frame crashing against the floor.
5. A hospital bed as in claim 1 in which said transverse axis for said main frame is located in the central portion of said bed, said bed further comprising a gas spring mounted between the head end portion of said main frame and said intermediate frame to support the head end of said main frame.
6. A hospital bed as in claim 5 further com-prising:
a handle on each side of said bed, means connecting each handle to a valve within said gas spring to permit said gas spring to collapse when either of said handles is actuated, thereby permitting a quick shift to Trendelenburg position by an attendant positioned at either side of said bed.
a handle on each side of said bed, means connecting each handle to a valve within said gas spring to permit said gas spring to collapse when either of said handles is actuated, thereby permitting a quick shift to Trendelenburg position by an attendant positioned at either side of said bed.
7. A hospital bed as in claim 6 further com-prising:
a transverse shaft rotatably mounted across said main frame, said handles being fixed to said shaft, a cam mounted on said shaft, a follower mounted on said main frame, means connecting said follower to said valve within said gas spring, the surface of said cam causing a valve-operating thrust of said follower when said rod is rotated in one direction by pulling on said handles and in the opposite direction by pushing on said handle.
a transverse shaft rotatably mounted across said main frame, said handles being fixed to said shaft, a cam mounted on said shaft, a follower mounted on said main frame, means connecting said follower to said valve within said gas spring, the surface of said cam causing a valve-operating thrust of said follower when said rod is rotated in one direction by pulling on said handles and in the opposite direction by pushing on said handle.
8. A hospital bed comprising:
a base, an elongated main frame, means connecting said main frame to said base on a transverse pivotal axis located centrally of said main frame, a gas spring connected to said main frame to support said main frame in a horizontal position, a valve in said gas spring operable to release said spring to permit said main frame to pivot, a handle on each side of said main frame at one end thereof, means pivotally mounting said handles to pivot up and down and to operate said valve when pivoted in either direction, whereby said one end of said main frame can be raised or lowered from either side of said bed by an operator using one hand.
a base, an elongated main frame, means connecting said main frame to said base on a transverse pivotal axis located centrally of said main frame, a gas spring connected to said main frame to support said main frame in a horizontal position, a valve in said gas spring operable to release said spring to permit said main frame to pivot, a handle on each side of said main frame at one end thereof, means pivotally mounting said handles to pivot up and down and to operate said valve when pivoted in either direction, whereby said one end of said main frame can be raised or lowered from either side of said bed by an operator using one hand.
9. A hospital bed as in claim 8 further com-prising:
a transverse shaft rotatably mounted across said main frame, said handles being fixed to said shaft, a cam mounted on said shaft, a follower mounted on said main frame, means connecting said follower to said valve within said gas spring, the surface of said cam causing a valve-operating thrust of said follower when said rod is rotated in one direction by pulling on said handles and in the opposite direction by pushing on said handle.
a transverse shaft rotatably mounted across said main frame, said handles being fixed to said shaft, a cam mounted on said shaft, a follower mounted on said main frame, means connecting said follower to said valve within said gas spring, the surface of said cam causing a valve-operating thrust of said follower when said rod is rotated in one direction by pulling on said handles and in the opposite direction by pushing on said handle.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US07/779,907 US5148562A (en) | 1991-10-21 | 1991-10-21 | Birthing bed adjustable to Trendelenburg position |
| US779,907 | 1997-01-07 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2078920A1 true CA2078920A1 (en) | 1993-04-22 |
Family
ID=25117958
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002078920A Abandoned CA2078920A1 (en) | 1991-10-21 | 1992-09-23 | Birthing bed adjustable to trendelenburg position |
Country Status (11)
| Country | Link |
|---|---|
| US (1) | US5148562A (en) |
| EP (1) | EP0539089B1 (en) |
| JP (1) | JP2542151B2 (en) |
| AT (1) | ATE157241T1 (en) |
| AU (2) | AU658676B2 (en) |
| CA (1) | CA2078920A1 (en) |
| DE (1) | DE69221813T2 (en) |
| DK (1) | DK0539089T3 (en) |
| ES (1) | ES2108094T3 (en) |
| GR (1) | GR3025060T3 (en) |
| HK (1) | HK1001912A1 (en) |
Families Citing this family (54)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| IT1265893B1 (en) * | 1993-11-29 | 1996-12-12 | Blasi Carmelo Di | ARTICULATED BED AND ARTICULATION FOR THE HANDLING OF AT LEAST PART OF IT. |
| US5715548A (en) * | 1994-01-25 | 1998-02-10 | Hill-Rom, Inc. | Chair bed |
| US5613255A (en) * | 1994-12-27 | 1997-03-25 | Hill-Rom, Inc. | Hospital bed having scissors lifting apparatus |
| US6212714B1 (en) * | 1995-01-03 | 2001-04-10 | Hill-Rom, Inc. | Hospital bed and mattress having a retracting foot section |
| USRE43155E1 (en) * | 1995-01-03 | 2012-02-07 | Hill-Rom Services, Inc. | Hospital bed and mattress having a retractable foot section |
| US6978501B2 (en) * | 1995-01-31 | 2005-12-27 | Kci Licensing, Inc. | Bariatric bed apparatus and methods |
| DE19528179B4 (en) * | 1995-08-01 | 2004-04-22 | Vauth-Sagel GmbH & Co. Grundstücksverwaltung | Hospital bed or nursing bed |
| US6584628B1 (en) | 1995-08-04 | 2003-07-01 | Hill-Rom Services, Inc. | Hospital bed having a rotational therapy device |
| US5774914A (en) * | 1996-01-05 | 1998-07-07 | Stryker Corporation | Maternity bed |
| US5862549A (en) * | 1996-01-05 | 1999-01-26 | Stryker Corporation | Maternity bed |
| US5926878A (en) * | 1996-01-05 | 1999-07-27 | Stryker Corporation | Maternity bed |
| US5655238A (en) * | 1996-04-05 | 1997-08-12 | Midmark Corporation | Extreme position surgery table top attachment |
| GB9624990D0 (en) * | 1996-11-30 | 1997-01-15 | Smiths Industries Plc | Patient support table |
| US5878452A (en) | 1996-12-03 | 1999-03-09 | Hill-Rom, Inc. | Long term care bed controls |
| US6089593A (en) | 1997-02-10 | 2000-07-18 | Hill-Rom, Inc. | Ambulatory care chair |
| US6726279B1 (en) | 1997-02-10 | 2004-04-27 | Hill-Rom Services, Inc. | Hydraulic controls for ambulatory care chair |
| US6739006B2 (en) | 1997-11-07 | 2004-05-25 | Hill-Rom Services, Inc. | Head section support for a surgical table apparatus |
| US6754923B2 (en) | 1997-11-07 | 2004-06-29 | Hill-Rom Services, Inc. | Leg section support for a surgical table |
| US6154899A (en) | 1998-10-19 | 2000-12-05 | Hill-Rom, Inc. | Resident transfer chair |
| US6408464B1 (en) | 1999-08-23 | 2002-06-25 | Hill-Rom Services, Inc. | Birthing bed foot section attachment mechanism |
| US6757924B2 (en) * | 1999-08-23 | 2004-07-06 | Hill-Rom Services, Inc. | Bed having a removable foot section |
| US6470520B1 (en) | 1999-08-23 | 2002-10-29 | Hill-Rom Services, Inc. | Bed section attachment mechanism |
| US6658680B2 (en) * | 1999-12-29 | 2003-12-09 | Hill-Rom Services, Inc. | Hospital bed |
| EP2085065B1 (en) | 2000-06-02 | 2012-08-01 | Hill-Rom Services, Inc. | Foot support for a patient support |
| US6868567B2 (en) * | 2002-07-19 | 2005-03-22 | Gf Health Products, Inc. | Height and angle adjustable bed |
| EP2181685B1 (en) | 2002-09-06 | 2014-05-14 | Hill-Rom Services, Inc. | Hospital bed with controlled inflatable portion of patient support |
| GB2423245B8 (en) | 2003-03-11 | 2015-01-21 | Chg Hospital Beds Inc | Steerable ultra-low patient bed |
| US7886380B2 (en) * | 2004-07-28 | 2011-02-15 | Hill-Rom Services, Inc. | Hospital bed |
| US7685659B2 (en) * | 2004-09-22 | 2010-03-30 | Hill-Rom Services, Inc. | Storable foot section for a bed |
| US7412739B2 (en) * | 2004-12-03 | 2008-08-19 | Stryker Corporation | Patient support apparatus with removable foot section |
| US7581266B2 (en) * | 2004-12-03 | 2009-09-01 | Stryker Corporation | Calf support assembly for a maternity bed foot support and abduction assembly |
| US7127756B2 (en) * | 2004-12-03 | 2006-10-31 | Stryker Corporation | Maternity bed foot support and abduction assembly |
| US7536734B2 (en) * | 2005-01-31 | 2009-05-26 | Hill-Rom Services, Inc. | Birthing support apparatus |
| US7698760B2 (en) * | 2005-11-17 | 2010-04-20 | Hill-Rom Services, Inc. | Hospital bed caster control system |
| US8104122B2 (en) | 2005-12-19 | 2012-01-31 | Hill-Rom Services, Inc. | Patient support having an extendable foot section |
| US9713388B2 (en) | 2009-03-11 | 2017-07-25 | Aaron Goldsmith | Modular user-assembled adjustable, and high-low adjustable beds |
| US20100229303A1 (en) | 2009-03-11 | 2010-09-16 | Aaron Goldsmith | Modular user-assembled adjustable, and high-low adjustable, beds |
| US20120186375A1 (en) * | 2011-01-20 | 2012-07-26 | Summer Infant (Usa), Inc. | Manual Height Adjustable Assembly For A Crib |
| US8800080B2 (en) | 2011-09-01 | 2014-08-12 | Drive Medical Design & Mfg. | Long term care bed |
| KR101496732B1 (en) * | 2013-08-19 | 2015-02-27 | 주식회사 해피베드 | Movable bed for patient adjustable in hight |
| US10130536B2 (en) | 2013-09-06 | 2018-11-20 | Stryker Corporation | Patient support usable with bariatric patients |
| US10188569B2 (en) | 2013-09-06 | 2019-01-29 | Stryker Corporation | Patient support usable with bariatric patients |
| EP2873400B1 (en) | 2013-11-18 | 2018-01-31 | Völker GmbH | Person support apparatus |
| US10111790B2 (en) | 2014-06-13 | 2018-10-30 | Medical Depot, Inc. | Long term care bed |
| US9994072B2 (en) | 2014-09-17 | 2018-06-12 | Medical Depot, Inc. | Patient care bed |
| US20170266068A1 (en) * | 2016-03-15 | 2017-09-21 | Medical Positioning, Inc. | Chair-to-table procedure apparatus and method for reversible use |
| US10842701B2 (en) | 2016-10-14 | 2020-11-24 | Stryker Corporation | Patient support apparatus with stabilization |
| CN106389052A (en) * | 2016-11-03 | 2017-02-15 | 郑州郑先医药科技有限公司 | Multi-purpose type gynecologic bed |
| CN108245366A (en) * | 2018-04-08 | 2018-07-06 | 济南奥尔尼医疗器械有限公司 | A kind of more position adjustable operating tables and its application method |
| US11857474B1 (en) * | 2020-01-06 | 2024-01-02 | Gf Health Products, Inc. | Bed that is movable from a low position to a high position with a load transfer assembly |
| CN113303990A (en) * | 2021-05-26 | 2021-08-27 | 王从相 | Obstetrical and gynecological hospital bed |
| CN113303987A (en) * | 2021-05-26 | 2021-08-27 | 王从相 | Intelligent driving sickbed bedstead and driving method thereof |
| CN113303989A (en) * | 2021-05-26 | 2021-08-27 | 王从相 | Leg support mechanism of obstetrical and gynecological hospital bed and method thereof |
| CN113197741A (en) * | 2021-05-26 | 2021-08-03 | 王从相 | Inclination control mechanism and method for sickbed |
Family Cites Families (20)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3336606A (en) * | 1966-03-24 | 1967-08-22 | Lite Hospital Equipment Inc | Bed for persons having physical disability |
| GB1198892A (en) * | 1968-01-19 | 1970-07-15 | Hoskins & Sewell Ltd | Improvements relating to Beds |
| US3492679A (en) * | 1968-02-23 | 1970-02-03 | Hill Rom Co Inc | Trendelenburg control mechanism |
| CA851402A (en) * | 1968-06-22 | 1970-09-15 | Royalmetal Corporation Limited | Hospital bed |
| GB1330889A (en) * | 1970-11-24 | 1973-09-19 | Nesbit Evans Co Ltd J | Hospital beds |
| CA905056A (en) * | 1971-05-05 | 1972-07-18 | The Dominion Metalware Industries Limited | Tilt bed |
| US3958283A (en) * | 1974-08-09 | 1976-05-25 | Hill-Rom Company, Inc. | Elevating and Trendelenburg mechanism for an adjustable bed |
| US4025972A (en) * | 1974-08-09 | 1977-05-31 | Hill-Rom Company, Inc. | Elevating and Trendelenburg mechanism for an adjustable bed |
| US4097939A (en) * | 1976-02-18 | 1978-07-04 | Hill-Rom Company, Inc. | Hospital bed |
| JPS6023127B2 (en) * | 1977-12-28 | 1985-06-06 | 日本板硝子株式会社 | Coated polycarbonate resin molded article with improved wear resistance |
| US4139917A (en) * | 1977-10-17 | 1979-02-20 | Loel Fenwick | Labor, delivery and patient care bed |
| AU534935B2 (en) * | 1978-09-14 | 1984-02-23 | George Weston Foods Limited | Hospital bed |
| JPS5930424B2 (en) * | 1981-03-16 | 1984-07-26 | 泰博 田中 | Delivery table |
| US4411035A (en) * | 1981-03-30 | 1983-10-25 | Loel Fenwick | Maternity care bed |
| JPS5946690A (en) * | 1982-09-10 | 1984-03-16 | カシオ計算機株式会社 | Input unit for electronic musical instrument |
| GB2147201B (en) * | 1983-10-01 | 1987-03-25 | Hoskins Ltd | Maternity bed |
| JPS61107531A (en) * | 1984-10-31 | 1986-05-26 | Nippon Polyurethan Kogyo Kk | Magnetic recording medium |
| FR2606631B1 (en) * | 1986-11-18 | 1991-03-22 | Medi 2000 Sarl | MEDICAL BED OR MEDICAL TABLE |
| JPS6455064A (en) * | 1987-08-21 | 1989-03-02 | Mitsubishi Electric Corp | Stator for superconducting electrical rotary machine |
| US4894876A (en) * | 1988-07-15 | 1990-01-23 | Hill-Rom Company, Inc. | Multipurpose maternity care bed |
-
1991
- 1991-10-21 US US07/779,907 patent/US5148562A/en not_active Expired - Lifetime
-
1992
- 1992-09-23 CA CA002078920A patent/CA2078920A1/en not_active Abandoned
- 1992-10-14 AU AU27021/92A patent/AU658676B2/en not_active Ceased
- 1992-10-14 ES ES92309356T patent/ES2108094T3/en not_active Expired - Lifetime
- 1992-10-14 DE DE69221813T patent/DE69221813T2/en not_active Expired - Fee Related
- 1992-10-14 EP EP92309356A patent/EP0539089B1/en not_active Expired - Lifetime
- 1992-10-14 DK DK92309356.1T patent/DK0539089T3/en active
- 1992-10-14 AT AT92309356T patent/ATE157241T1/en not_active IP Right Cessation
- 1992-10-20 JP JP4281522A patent/JP2542151B2/en not_active Expired - Fee Related
-
1995
- 1995-02-09 AU AU11664/95A patent/AU675608B2/en not_active Ceased
-
1997
- 1997-10-15 GR GR970402706T patent/GR3025060T3/en unknown
-
1998
- 1998-02-09 HK HK98100976A patent/HK1001912A1/en not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| JPH05300924A (en) | 1993-11-16 |
| ATE157241T1 (en) | 1997-09-15 |
| DE69221813T2 (en) | 1998-01-02 |
| AU1166495A (en) | 1995-05-18 |
| AU675608B2 (en) | 1997-02-06 |
| AU2702192A (en) | 1993-04-22 |
| DE69221813D1 (en) | 1997-10-02 |
| DK0539089T3 (en) | 1997-09-29 |
| US5148562A (en) | 1992-09-22 |
| ES2108094T3 (en) | 1997-12-16 |
| HK1001912A1 (en) | 1998-07-17 |
| AU658676B2 (en) | 1995-04-27 |
| EP0539089B1 (en) | 1997-08-27 |
| JP2542151B2 (en) | 1996-10-09 |
| EP0539089A1 (en) | 1993-04-28 |
| GR3025060T3 (en) | 1998-01-30 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| FZDE | Discontinued |