CA1055383A - Mobile chair base having locking means - Google Patents
Mobile chair base having locking meansInfo
- Publication number
- CA1055383A CA1055383A CA209,537A CA209537A CA1055383A CA 1055383 A CA1055383 A CA 1055383A CA 209537 A CA209537 A CA 209537A CA 1055383 A CA1055383 A CA 1055383A
- Authority
- CA
- Canada
- Prior art keywords
- chair
- leg rest
- rod
- base
- recited
- 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.)
- Expired
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
- B60B33/00—Castors in general; Anti-clogging castors
- B60B33/02—Castors in general; Anti-clogging castors with disengageable swivel action, i.e. comprising a swivel locking mechanism
- B60B33/021—Castors in general; Anti-clogging castors with disengageable swivel action, i.e. comprising a swivel locking mechanism combined with braking of castor wheel
-
- 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
- A61G5/00—Chairs or personal conveyances specially adapted for patients or disabled persons, e.g. wheelchairs
Abstract
ABSTRACT OF THE DISCLOSURE
The base of the rockable lounger chair has rubber tired wheels at the front end and casters at the rear end.
Lever means is employed which is operated by the handle which extends and retracts the leg rest to raise spring pressed plungers from the tires of the front wheels. This permits the chair to be moved to another location only when the leg rest is extended and the chair is locked against rocking movement. When the handle is retracted partially or fully, the position of the leg rest is adjusted or retracted and the front wheels of the chair are locked, retaining the chair in fixed position. In this position the chair will not roll when an occupant is getting in or out of the chair. This is of special advantage when the chair is used in the Health Care Field.
The base of the rockable lounger chair has rubber tired wheels at the front end and casters at the rear end.
Lever means is employed which is operated by the handle which extends and retracts the leg rest to raise spring pressed plungers from the tires of the front wheels. This permits the chair to be moved to another location only when the leg rest is extended and the chair is locked against rocking movement. When the handle is retracted partially or fully, the position of the leg rest is adjusted or retracted and the front wheels of the chair are locked, retaining the chair in fixed position. In this position the chair will not roll when an occupant is getting in or out of the chair. This is of special advantage when the chair is used in the Health Care Field.
Description
~5~,3~3 RELATED APPLIGATION
Reference may be had to the copending application of E. J.
Shoemaker et al which issued into patent 1, 001, 600 which was assigned to the assignee of the present invention and over which the present base is believed ~ ;
patentable.
SUMMARY OF THE INVENTION
~ . .
The invention pertains to a base for a reclining platform rocking chair, similar to that illustrated in the patent to Knabusch et al, No. 799, 767, which provides mobility thereto. The base is provided with rubber tired wheels at the front end which contacts the floor and with casters at the rear end. Spring pressed plungers engage the tires on the front wheels for the purpose of locking the wheels against rotation when the leg rest of the chair is retracted. When the handle at the side of the chair is operated to extend the leg rest, the plungers are retracted near the end of the leg rest extended movement releasing the front wheels and permitting the chair to be moved to another location. The chair will again be retained against movement when the leg rest is partially or fully retracted which releases the plungers so that they can again be urged against the t~res of the wheels.
'~
1~53~33 In general terms, the present invention provides, in a base for a chair, a base frame having side elements with at least one cross bar therebetween, a wheel mounted at the forward end of each side element, a castor mounted at each rear end of said side element, a spring pressed locking type member at the front ends of the side elements which are urged by the springs into engagement with the wheels, a leg rest mounted at the forward end of the chair, a leg rest mechanism including link means on the sides of the chair for supporting and moving the leg rest to extended and retracted positions, and means operated when the link means moves said leg rest from retracted position for releasing said locking means.
Preferably, each said wheel is mounted on a shaft through an inverted U-shaped bracket, said locking member embodying a rod exte~ding through an aperture in the end web of the bracket, a spring within the bracket about said rod for urging the rod axially, and a lever pivoted to the extending end of said rod for moving the opposite end of the rod away from said wheel when the lever is actuated. It is also preferred that each side member of the base have an inwardly extending boss, and a tubular cross member having its ends extending over said bosses and secured thereto.
In another aspect of the present invention, a rollable base is provided for a chair, having rolling means thereon engageable with the floor, means for locking said rolling means against rolling movement, a leg rest, means for ``
moving said rest from retracted position to extended position and means actuated by said leg rest moving means ~or releasing -said rolling means and permitting said chair to be rolled when the leg rest is moved from retracted position.
:.
-2a-'3.'~i~
:: . . . . .
1~553~
~ ;~
BP"IEF DESCRIPTION OF THE DRAWINGS
Figure 1 is a view in elevation of a lounging chair mounted for rocking movement on the base of the present invention;
Fig. 2 is a broken plan view of the base, the rocker parts and footrest structure of the chair illustrated in Fig. l;
Fig. ~ is a view in side elevation of the base and locking system therefor illustrated in Fig. 2;
Fig. 4 is an enlarged broken view of the front end portion of the structure illustrated in Fig. 3, taken on the line 4-4 of Fig. 2;
Fig. 5 is a sectional viev~ of the structure illustrated in Fig. 4, 10 taken on the line 5~ thereof, and Fig. 6 is an enlarged broken view of the front end portion of the structure illustrated in Fig. 3.
DESGRIPTION OF THE PREFERE~ED EMBODIMENT
The chair 11, as illustrated in Fig. 1, is rockable upon a base 12 which embodies features of the present invention. The chair 11 has a leg rest 13 which is operated by a handle 14 to extended and retracted positions.
rockable chair frame 10 has side frame elements 15 interconnected by cross members 16 and 17 at the rear and front ends, respectively. The side frame elements 15 of the chair frame 10 have the convex arcuate bottom surfaces of the rocking members 18 resting upon the planar top section 19 of the base 12.
20 The rocking members 18 are connected to the side frame elements 15 and to the base 12 by spring units 22 of conventional construction.
The springs of the units 22 have the top turns secured in slots in metal brackets 24 which are attached to the lnner face of the rocker mem-ber 18 by a plurality of screws 25, as illustrated in Fig. 5. The bottom turns of the springs are secured in slots in metal brackets 26 which are secured to a bottom section 27 of the base side frame elements 20 of the base 12 by a lOSS3~3 plurality of screws 28. The endmost turns of the spring are retained within the slots of the brackets 24 and 26 by struck-out tabs 29 which are bent there-over in the conventional manner. At the front of the base frame elements 20 rubber tired wheels 31 are mounted within inverted U-shaped brackets 32 the lower end of the inner arm of which is securely welded to the end of a square cross member 33. A bolt 34 extends through the arms of the U-shaped brac-kets 32 and through the wheels 31 on which they are mounted for rotation.
Each side frame member 20 is a casting preferably made of white metal, having an outer face and inwardly extending top and bottom flanges to which 10 the cross members are secured in fixed relationship.
An inwardly extending square boss 37 is molded outwardly of the inner face of the base frame members 20 over which the ends of a hollow square tubular cross member 38 extend. The ends are secured in fixed re-lation to the bosses 37 by bolts 39 extending therethrough. The outer side 41 of the U-shaped bracket 32 is secured against a recessed wall in the solid ~ ~ ' downwardly extending end 42 of the side frame member 20 by a screw 43. The screw 43 which extends through the outer arm of the bracket 32 is threaded into a threaded aperture 44 in the solid downwardly extending end 42 of the frame member 20. The opposite end of the frame member 20 slopes down-wardly at 45 and upwardly and outwardly at 46 having an outer end section 47 in which the stem of a caster 48 is secured.
The bracket 32, as illustrated more specifically in Fig. 6, has a plate 51 secured across the arms thereof and provided with an aperture 52 through which a rod 53 extends and also through an aperture 55 through the web end portion 54 thereof. The rod has a s~uare head 56 on the bottom end containing serrations 57 which engage a rubber tire 58 on the wheel 31. A~
spring 59 abuts the web end portion 54 when compressed thereagainst by a roll pin 61 to urge the head 56 downwardly against the tire 58 to prevent the wheel 31 from rotating. The rod 53 has a washer 62 extending thereover ~05s383 engaged by a cam end 63 of a link 64 which is U-shaped in cross section. The link has spaced sides thereof disposed on opposite sides of the upper end of the rod 53 and secured thereto by a roll pin 65, The opposite end of the link 64 is secured to a link 66 by a pivot -pin 67 which pulls the rod 53 to the left when the link 66 is moved to the left.With the cam end 63 resting on the washer 62, the pin 65 and rod 53 are moved outwardly to move the head 56 from engagement with the tire 58. The link 66 is secured to the end of an arm 68 by a pivot pin 69 with khe opposite end of the arm 68 bent inwardly and reversely bent into U-shape and provided with aligned square holes 71 through the opposite walls of the U-shaped end. The arms 68 are secured to the ends of a square rod 72 and secured thereto by screws 73. 'rhe square tube 38 has a pair of upstanding arms 74 welded there-to through which the rod 72 is supported in circular flanges sleeves 75 con-tained in upper cylindrical apertures which permits the rod and sleeves to ~ ~ `
rotate therein.
An arm 76, similar to the arms 68, having a U-shaped end 70 with aligned square holes through the opposite walls thereof, is secured on the rod 72 by a screw 73 providing an operating arm for rotating the rod. The arm 76 has its extending end engaged by a pivot pin 77 which extends through a slot 78 at the end of a link 79. ~ link 81 is secured at one end over a pin 82 of a ratchet operating arm 83 and at the other end is secured to the link 79 by a screw 84 which is threaded into one of a plurality of apertures 85 which provides adjustment in length to the link 79. The pin 77 will engage the end of the slot 78 near the end of the swinging movement of the arm 83 to release the heads 56 from the tires 58. The arm 83 is secured to a square rod 86 which is operated by a handle 14 on the outer righthand side of the chair.
The leg rest 13 is mounted on scissors type linkage 87 for sup-porting the leg rest 13 forwardly of the chair when the handle 14 is rotated upwardly and to the rear. Near the end of the leg rest extension, the arm . ~ .
~, _5_ ~L~)553~
76 is moved counterclockwise to move the arm 68 and link 66 to the left, as viewecl in ~ig. 6, moving the link 64 counterclockwise to thereby move the pins 65 outwardly for moving the rods 53 and heads 56 away trom the tires 58.
A holding and trip mechanism 88 locks the leg rest in extended position and permits the retraction thereof when the handle 14 is reversed. The square cross member 33 has a pair of spaced posts 91 secured thereto by screws 92.
A shaft 93 is supported in aligned apertures in the two posts for pivotally sup-porting the ratchet engaging arm 94 in position to having its end 97 engage one of a plurality of teeth 95 for locking the chair against forward rocking move-10 ment when the leg rest is extended. ~hen moving the operating handle 14 toretract the leg rest 13, a wire loop 96 connected to the arm 94 releases the end 97 thereof from the engaged teeth 95 and permits the chair to again rock in the normal manner while locking the front wheels against movement. This, and other novel features of the chair, can be studied in detail in E. M. Knabusch et al, Canadian Patent No. 799, 767 above mentioned which discloses the same chair as that of the present invention except for the mobile base.
Reference may be had to the copending application of E. J.
Shoemaker et al which issued into patent 1, 001, 600 which was assigned to the assignee of the present invention and over which the present base is believed ~ ;
patentable.
SUMMARY OF THE INVENTION
~ . .
The invention pertains to a base for a reclining platform rocking chair, similar to that illustrated in the patent to Knabusch et al, No. 799, 767, which provides mobility thereto. The base is provided with rubber tired wheels at the front end which contacts the floor and with casters at the rear end. Spring pressed plungers engage the tires on the front wheels for the purpose of locking the wheels against rotation when the leg rest of the chair is retracted. When the handle at the side of the chair is operated to extend the leg rest, the plungers are retracted near the end of the leg rest extended movement releasing the front wheels and permitting the chair to be moved to another location. The chair will again be retained against movement when the leg rest is partially or fully retracted which releases the plungers so that they can again be urged against the t~res of the wheels.
'~
1~53~33 In general terms, the present invention provides, in a base for a chair, a base frame having side elements with at least one cross bar therebetween, a wheel mounted at the forward end of each side element, a castor mounted at each rear end of said side element, a spring pressed locking type member at the front ends of the side elements which are urged by the springs into engagement with the wheels, a leg rest mounted at the forward end of the chair, a leg rest mechanism including link means on the sides of the chair for supporting and moving the leg rest to extended and retracted positions, and means operated when the link means moves said leg rest from retracted position for releasing said locking means.
Preferably, each said wheel is mounted on a shaft through an inverted U-shaped bracket, said locking member embodying a rod exte~ding through an aperture in the end web of the bracket, a spring within the bracket about said rod for urging the rod axially, and a lever pivoted to the extending end of said rod for moving the opposite end of the rod away from said wheel when the lever is actuated. It is also preferred that each side member of the base have an inwardly extending boss, and a tubular cross member having its ends extending over said bosses and secured thereto.
In another aspect of the present invention, a rollable base is provided for a chair, having rolling means thereon engageable with the floor, means for locking said rolling means against rolling movement, a leg rest, means for ``
moving said rest from retracted position to extended position and means actuated by said leg rest moving means ~or releasing -said rolling means and permitting said chair to be rolled when the leg rest is moved from retracted position.
:.
-2a-'3.'~i~
:: . . . . .
1~553~
~ ;~
BP"IEF DESCRIPTION OF THE DRAWINGS
Figure 1 is a view in elevation of a lounging chair mounted for rocking movement on the base of the present invention;
Fig. 2 is a broken plan view of the base, the rocker parts and footrest structure of the chair illustrated in Fig. l;
Fig. ~ is a view in side elevation of the base and locking system therefor illustrated in Fig. 2;
Fig. 4 is an enlarged broken view of the front end portion of the structure illustrated in Fig. 3, taken on the line 4-4 of Fig. 2;
Fig. 5 is a sectional viev~ of the structure illustrated in Fig. 4, 10 taken on the line 5~ thereof, and Fig. 6 is an enlarged broken view of the front end portion of the structure illustrated in Fig. 3.
DESGRIPTION OF THE PREFERE~ED EMBODIMENT
The chair 11, as illustrated in Fig. 1, is rockable upon a base 12 which embodies features of the present invention. The chair 11 has a leg rest 13 which is operated by a handle 14 to extended and retracted positions.
rockable chair frame 10 has side frame elements 15 interconnected by cross members 16 and 17 at the rear and front ends, respectively. The side frame elements 15 of the chair frame 10 have the convex arcuate bottom surfaces of the rocking members 18 resting upon the planar top section 19 of the base 12.
20 The rocking members 18 are connected to the side frame elements 15 and to the base 12 by spring units 22 of conventional construction.
The springs of the units 22 have the top turns secured in slots in metal brackets 24 which are attached to the lnner face of the rocker mem-ber 18 by a plurality of screws 25, as illustrated in Fig. 5. The bottom turns of the springs are secured in slots in metal brackets 26 which are secured to a bottom section 27 of the base side frame elements 20 of the base 12 by a lOSS3~3 plurality of screws 28. The endmost turns of the spring are retained within the slots of the brackets 24 and 26 by struck-out tabs 29 which are bent there-over in the conventional manner. At the front of the base frame elements 20 rubber tired wheels 31 are mounted within inverted U-shaped brackets 32 the lower end of the inner arm of which is securely welded to the end of a square cross member 33. A bolt 34 extends through the arms of the U-shaped brac-kets 32 and through the wheels 31 on which they are mounted for rotation.
Each side frame member 20 is a casting preferably made of white metal, having an outer face and inwardly extending top and bottom flanges to which 10 the cross members are secured in fixed relationship.
An inwardly extending square boss 37 is molded outwardly of the inner face of the base frame members 20 over which the ends of a hollow square tubular cross member 38 extend. The ends are secured in fixed re-lation to the bosses 37 by bolts 39 extending therethrough. The outer side 41 of the U-shaped bracket 32 is secured against a recessed wall in the solid ~ ~ ' downwardly extending end 42 of the side frame member 20 by a screw 43. The screw 43 which extends through the outer arm of the bracket 32 is threaded into a threaded aperture 44 in the solid downwardly extending end 42 of the frame member 20. The opposite end of the frame member 20 slopes down-wardly at 45 and upwardly and outwardly at 46 having an outer end section 47 in which the stem of a caster 48 is secured.
The bracket 32, as illustrated more specifically in Fig. 6, has a plate 51 secured across the arms thereof and provided with an aperture 52 through which a rod 53 extends and also through an aperture 55 through the web end portion 54 thereof. The rod has a s~uare head 56 on the bottom end containing serrations 57 which engage a rubber tire 58 on the wheel 31. A~
spring 59 abuts the web end portion 54 when compressed thereagainst by a roll pin 61 to urge the head 56 downwardly against the tire 58 to prevent the wheel 31 from rotating. The rod 53 has a washer 62 extending thereover ~05s383 engaged by a cam end 63 of a link 64 which is U-shaped in cross section. The link has spaced sides thereof disposed on opposite sides of the upper end of the rod 53 and secured thereto by a roll pin 65, The opposite end of the link 64 is secured to a link 66 by a pivot -pin 67 which pulls the rod 53 to the left when the link 66 is moved to the left.With the cam end 63 resting on the washer 62, the pin 65 and rod 53 are moved outwardly to move the head 56 from engagement with the tire 58. The link 66 is secured to the end of an arm 68 by a pivot pin 69 with khe opposite end of the arm 68 bent inwardly and reversely bent into U-shape and provided with aligned square holes 71 through the opposite walls of the U-shaped end. The arms 68 are secured to the ends of a square rod 72 and secured thereto by screws 73. 'rhe square tube 38 has a pair of upstanding arms 74 welded there-to through which the rod 72 is supported in circular flanges sleeves 75 con-tained in upper cylindrical apertures which permits the rod and sleeves to ~ ~ `
rotate therein.
An arm 76, similar to the arms 68, having a U-shaped end 70 with aligned square holes through the opposite walls thereof, is secured on the rod 72 by a screw 73 providing an operating arm for rotating the rod. The arm 76 has its extending end engaged by a pivot pin 77 which extends through a slot 78 at the end of a link 79. ~ link 81 is secured at one end over a pin 82 of a ratchet operating arm 83 and at the other end is secured to the link 79 by a screw 84 which is threaded into one of a plurality of apertures 85 which provides adjustment in length to the link 79. The pin 77 will engage the end of the slot 78 near the end of the swinging movement of the arm 83 to release the heads 56 from the tires 58. The arm 83 is secured to a square rod 86 which is operated by a handle 14 on the outer righthand side of the chair.
The leg rest 13 is mounted on scissors type linkage 87 for sup-porting the leg rest 13 forwardly of the chair when the handle 14 is rotated upwardly and to the rear. Near the end of the leg rest extension, the arm . ~ .
~, _5_ ~L~)553~
76 is moved counterclockwise to move the arm 68 and link 66 to the left, as viewecl in ~ig. 6, moving the link 64 counterclockwise to thereby move the pins 65 outwardly for moving the rods 53 and heads 56 away trom the tires 58.
A holding and trip mechanism 88 locks the leg rest in extended position and permits the retraction thereof when the handle 14 is reversed. The square cross member 33 has a pair of spaced posts 91 secured thereto by screws 92.
A shaft 93 is supported in aligned apertures in the two posts for pivotally sup-porting the ratchet engaging arm 94 in position to having its end 97 engage one of a plurality of teeth 95 for locking the chair against forward rocking move-10 ment when the leg rest is extended. ~hen moving the operating handle 14 toretract the leg rest 13, a wire loop 96 connected to the arm 94 releases the end 97 thereof from the engaged teeth 95 and permits the chair to again rock in the normal manner while locking the front wheels against movement. This, and other novel features of the chair, can be studied in detail in E. M. Knabusch et al, Canadian Patent No. 799, 767 above mentioned which discloses the same chair as that of the present invention except for the mobile base.
Claims (7)
1. In a base for a chair, a base frame having side elements with at least one cross bar therebetween, a wheel mounted at the forward end of each side element, a castor mounted at each rear end of said side element, a spring pressed locking type member at the front ends of the side elements which are urged by the springs into engagement with the wheels, a leg rest mounted at the forward end of the chair, a leg rest mechanism including link means on the sides of the chair for supporting and moving the leg rest to extended and retracted positions, and means operated when the link means moves said leg rest from retracted position for releasing said locking means.
2. In a base for a chair as recited in claim 1, wherein each said wheel is mounted on a shaft through an inverted U-shaped bracket, said locking member embodying a rod extending through an aperture in the end web of the bracket, a spring within the bracket about said rod for urging the rod axially, and a lever pivoted to the extending end of said rod for-moving the opposite end of the rod away from said wheel when the lever is actuated.
3. In a base for a chair as recited in claim 2, wherein one end of said lever engages said web, and operating means for the other end of the lever which moves said rod axially away from said wheel.
4. In a base for a chair as recited in claim 1, wherein each side member of the base has an inwardly extending boss, and a tubular cross member having its ends extending over said bosses and secured thereto.
5. In a base for a chair as recited in claim 4, wherein said tubular cross member has upstanding arms, a square rod rotatably supported by said arms, and means for rotating said square rod actuated by said operating means.
6. In a base for a chair as recited in claim 5, wherein a rotatable rod is provided in said leg rest mechanism, a handle for rotating said rotatable rod, an actuating arm fixed on to said rotatable rod, and a link connecting said actuating arm to an arm on said square rod for operating a mechanism to release the wheels when the handle has been moved to leg rest extended position.
7. A rollable base for a chair, having rolling means thereon engageable with the floor, means for locking said rolling means against rolling movement, a leg rest, means for moving said rest from retracted position to extended position and means actuated by said leg rest moving means for releasing said rolling means and permitting said chair to be rolled when the leg rest is moved from retracted position.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US39908173 US3848924A (en) | 1973-09-20 | 1973-09-20 | Mobile chair base having locking means |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1055383A true CA1055383A (en) | 1979-05-29 |
Family
ID=23578064
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA209,537A Expired CA1055383A (en) | 1973-09-20 | 1974-09-19 | Mobile chair base having locking means |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US3848924A (en) |
| JP (1) | JPS5522099B2 (en) |
| CA (1) | CA1055383A (en) |
| GB (1) | GB1464623A (en) |
| MY (1) | MY7800221A (en) |
| ZA (1) | ZA745982B (en) |
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4212494A (en) * | 1978-07-24 | 1980-07-15 | Kroehler Mfg. Co. | Rocker reclining chair with multi-position rocker lock |
| US4291913A (en) * | 1979-10-09 | 1981-09-29 | Mohasco, Corp. | Manually-operated reclining chairs |
| US5135284A (en) * | 1991-01-09 | 1992-08-04 | Leggett & Platt, Incorporated | Knock-down chair back bracket |
| US5372398A (en) * | 1993-04-02 | 1994-12-13 | Chrysler Corporation | Vehicle seat assembly with retracting latch/engaging roller seat-to-floor lock |
| US6726279B1 (en) | 1997-02-10 | 2004-04-27 | Hill-Rom Services, Inc. | Hydraulic controls for ambulatory care chair |
| US6089593A (en) | 1997-02-10 | 2000-07-18 | Hill-Rom, Inc. | Ambulatory care chair |
| US6154899A (en) * | 1998-10-19 | 2000-12-05 | Hill-Rom, Inc. | Resident transfer chair |
| US6776453B1 (en) * | 1999-11-19 | 2004-08-17 | Reliable Constructionsheaters, Inc. | Seating device having a helmet heating rack |
| USD723847S1 (en) | 2013-03-05 | 2015-03-10 | Integra, Inc. | Furniture legs |
| CN110403775A (en) * | 2019-08-14 | 2019-11-05 | 东莞乐缘塑胶五金制品科技有限公司 | A kind of wheelchair with rocking chair function |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1810428A (en) * | 1929-06-18 | 1931-06-16 | Lazzeri Nello | Baby carriage |
| US2713891A (en) * | 1953-01-02 | 1955-07-26 | William A Linquist | Wheel chair construction |
| US3096121A (en) * | 1961-07-21 | 1963-07-02 | La Z Boy Chair Co | Reclining platform rocking chair |
-
1973
- 1973-09-20 US US39908173 patent/US3848924A/en not_active Expired - Lifetime
-
1974
- 1974-06-20 GB GB2734874A patent/GB1464623A/en not_active Expired
- 1974-09-19 JP JP10827574A patent/JPS5522099B2/ja not_active Expired
- 1974-09-19 CA CA209,537A patent/CA1055383A/en not_active Expired
- 1974-09-20 ZA ZA00745982A patent/ZA745982B/en unknown
-
1978
- 1978-12-30 MY MY7800221A patent/MY7800221A/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5522099B2 (en) | 1980-06-14 |
| MY7800221A (en) | 1978-12-31 |
| JPS5077160A (en) | 1975-06-24 |
| AU6935374A (en) | 1975-12-11 |
| US3848924A (en) | 1974-11-19 |
| ZA745982B (en) | 1975-10-29 |
| GB1464623A (en) | 1977-02-16 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CA1055383A (en) | Mobile chair base having locking means | |
| JP4986326B2 (en) | Casters and braking systems | |
| US6092824A (en) | Wheelchair automatic anti-rollback assembly | |
| US6264007B1 (en) | Automatic locking system for wheelchairs | |
| US5347682A (en) | Two position floor lock and caster assembly | |
| US6256835B1 (en) | Caster with a locking mechanism | |
| US5791434A (en) | Mobile warehouse ladder | |
| US2782870A (en) | Brake for invalid's chair | |
| KR102003386B1 (en) | Foldable Electric Quick Board | |
| US6277141B1 (en) | Orthopedic apparatus with fluid braking | |
| EP0488436B1 (en) | Rolling device as game of skill | |
| WO2000063058A1 (en) | Hand truck having ground engaging lever for tilting | |
| US3801122A (en) | Lounge chair having mobile base | |
| US4098519A (en) | Wheeled sled | |
| JPH09123915A (en) | Shopping cart | |
| US20080217103A1 (en) | All Directional Ladder | |
| GB2338647A (en) | Folding leg apparatus | |
| US6003946A (en) | Chair having reclinable back | |
| US3860992A (en) | Wheel lock for transport cart | |
| GB2099693A (en) | Improvements in or relating to castors | |
| JP3825535B2 (en) | Silver mosquito | |
| JP3183656B2 (en) | Casters | |
| JPS6297550A (en) | Armchair | |
| WO2004074069A1 (en) | Cart brake mechanism | |
| JPH0337063A (en) | Reclining backrest assembly for wheelchair |