US 2135148 A
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Description (OCR text may contain errors)
Filed May 24, 19:57
Patented Nov. 1, 1938 UN ED STA S OFFICE;
The present invention relates to improvements insuction apparatus particularly adapted for absorbing blood during surgical operations.
An object'of the invention is the provision of ,5 bloodsuction apparatus of generally improved design.
Another object of the invention is the provision of suction apparatus of the abovecharacter which is constructed so as to permit accurate regulation of the suction action.
A further object of the invention is the provision of suction apparatus of the aforesaid character of the fluid velocity type which may be operated by ordinary water pressure.
Still another object of the invention is the provision of a suction apparatus of the above character which is relatively simple in construction and efficient and reliable in operation.
Other objects and advantages of the invention will become apparent asv the description progresses.
In the accompanying drawing forming a part of this specification and in which like reference characters are employed to designate corresponding parts throughout the same:
Figure l is a perspective view of the assembled apparatus,
Figure 2 is a vertical longitudinal section through the same, and
Figure 3 is a transverse section taken on the line 3-3 of Figure 2.
Referring to the drawing, wherein for the purpose of illustration is shown a preferred embodiment of the invention, l generally designates the body of the apparatus, in the present instance, in the form of a flat, approximately rectangular, metallic block having a through bore ll formed longitudinally through the centre portion. The major portion of the through bore H is interiorly screw threaded, while the lower portion, providing an ejection passage, is mainly smooth.
At the intermediate portion of the bore l I, that is, at the lower end of the threaded section, is mounted a removable nozzle l2 embodying an upper enlarged portion threadedly engaging the bore and an elongated axial extension shank l3, of reduced diameter. The nozzle is formed with a central through 'bore M, of relatively small diameter, and is provided in the top with a transverse groove IE to facilitate its threaded connection. In one side of the body block is formed an angular passage I1, having a longitudinal or vertical leg I8 extending to the bottom end of the body and an upper horizontal leg I9 running into the upper threaded section of the centralthrough bore I, above the upper inlet end of the nozzle I2. As shown, the top of the through bore'l'l is normally closedby a screw plug 20.
Inlthe opposite side of the body block I 0 is formed an angular passage .22 embodying a vertical'leg 23 extending to the top of the block and havinglthe lower inturned .legirunning into and communicating with the lower ejection passage forming portion of the central through bore. As' illustrated at Figure 2, the angular passage 22 runs into the through bore at a point just below the threaded connection of the nozzle and at a point above the bottom outlet end of the nozzle shank.
A discharge pipe 25 is threadedly connected with the lower end of the central bore. A ring 26 is mounted in the upper end of the pipe 25, in the lower portion of the bore, was to form an annular section of restricted diameter in the ejection passage. An angular pipe 28 is attached to one side of the body by extension through a bore in the upper side portion, in communicative connection with the upper portion of the angular passage 22. A fluid supply pipe 30 is threadedly connected with the lower end of the angular feed passage l'l, this pipe being equipped with a control valve 3i for controlling the passage of fluid into the feed passage. A vacuum gauge 33, of any preferred type, is connected with the upper end of the angular passage 22 so as to indicate the vacuum created in this passage. To a bore 35 through the front of the body block In, in communication with the upper end of the angular passage 22 in the block, is connected the inner end of an air supply fitting 36, in the present example in the form of an angular air connection of the type commonly employed on radiators, equipped with a valve 31 embodying an operating disc 38.
To the outer end of the angular pipe 28 may be connected a flexible tube 40 attached to a liquid drain fitting 4|, of the type commonly employed for draining or absorbing blood during surgical operations.
The apparatus operates asfollows:
The supply conduit 30 may be connected with the tap of an ordinary city water supply system, so as to operate the apparatus by the customary pressure thereof. By opening the valve 3| the water, under superatmospheric pressure, is conducted through the angular feed passage ll of the body into the upper portion of the main central bore thereof and is discharged downwardly through the restricted bore I4 of the nozzle. As the water discharges through the lower end of the nozzle at a relatively high velocity, through the lower ejection passage and the restricted section thereof, vacum is created in this passage and within the angular suction passage 22 so that suction is created in the tube 40 and in the blood absorbing device 4|. Upon opening the valve'3'l of the air supply fitting, a regulated supply of air may be admitted to the suction passage to selectively vary the vacuum therein. While the vacuum created in the fluid velocity passage may be regulated to some extent by operation'of the supply valve 3|, much greater accuracy of regulation is attained by the operation of the air valve 31 controlling the inlet of air from the atmos- The actual vacuum created in the apparatus may be determined by inspection of the gauge 33 so that the desired phere into the suction passage.
vention herein shown and described is to be taken as a preferred example of the same, and that various changes as to the shape, size and arrangement of parts may be resorted to without departing from the spirit of the invention or the scope of the subjoined claim.
' Having thus described my invention, I claim:-
A suction apparatus of the character described comprising a body, said body having a passage formed therethrough, meansclosing said passage at oneend, said body having a liquid inlet passage connected perpendicular to said first passage formed therein, said body having an exhaust passage formed therein connected perpendicular to said first passage and below said inlet passage connection, a restricted nozzle removably positioned in said first passage below the connection with said inlet passage, a narrow portion of said nozzle extending past the connection of said exhaust passage to said first passage, an exhaust pipe connected to said exhaust passage by a passage formed in said body; an air inlet valve connected to said exhaust. passage by a passage formed in said body and a vacuum gauge con- WILLIE ROY.