US3918453A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Surgical suction device
Assignee: Baxter International Inc
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Filing: 1974-07-01
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Granted: 1975-11-11
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Expires: 1994-07-01
Abstract
Abstract A surgical suction device is provided having a suction tip and a suction motor communicating with the tip by a length of flexible tubing. The improvement of this invention relates to a control for starting and stopping the motor. The control is positioned remotely from the suction tip, while pneumatic pressure varying means, communicating with the control, are positioned adjacent the suction tip. The control is operated in a manner responsive to pressure variations in the pneumatic pressure means.
Inventors
- 👤 Ronald J Leonard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 09:38
CPC Classifications
A; A61; A61M; A61M1/00; A61M1/71; A61M1/74; A61M1/741; A61M1/7411; A61M1/76; A61B; A61B18/00; A61B2018/0091; A61B2018/00916; A61B2018/00928; A61B2018/00934
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
116 words
IN a surgical suction device which comprises a tubular suction member having a suction tip, and a mechanically-operated blood suction pump, the improvement comprising: pressure responsive pump control means for actuating said suction pump upon sensing a first pressure level, and for shutting said pump off upon sensing a second pressure level, a pressure conduit, other than said suction member, communicating with said pressure responsive pump control means for providing pressure for sensing by said control means, said pressure conduit extending to a position adjacent said suction tip; and means for varying and controlling, from a position adjacent said suction tip, the pressure within said pressure conduit to correspondingly control the operation of said suction pump.
Claim 2
Dependent Claim
116 words
IN a surgical suction device which comprises a tubular suction member having a suction tip, and a mechanically-operated blood suction pump, the improvement comprising: pressure responsive pump control means for actuating said suction pump upon sensing a first pressure level, and for shutting said pump off upon sensing a second pressure level, a pressure conduit, other than said suction member, communicating with said pressure responsive pump control means for providing pressure for sensing by said control means, said pressure conduit extending to a position adjacent said suction tip; and means for varying and controlling, from a position adjacent said suction tip, the pressure within said pressure conduit to correspondingly control the operation of said suction pump.
Claim 3
Dependent Claim
87 words
The device of claim 1 in which said pressure controlling means comprises a source for providing pressurized fluid to said pressure conduit, and a manually obstructable aperture, communicating with the exterior, in said pressure conduit adjacent said suction tip, whereby obstruction of said aperture elevates the pressure in said pressure conduit, to actuate said pump control means to operate said pump, and removal of said obstruction causes said fluid pressure to fall back toward essentially ambient pressure, actuating said pump control means to shut said pump off.
Claim 4
Dependent Claim
11 words
The device of claim 2 in which said fluid is air.
Claim 5
Dependent Claim
20 words
The surgical suction device of claim 2 in which said mechanically-operated blood suction pump is an electrically operated roller pump.
Claim 6
Dependent Claim
88 words
The device of claim 1 in which said pressure controlling means comprises a suction source communicating with said pressure conduit, and a manually obstructable aperture communicating with the exterior in said pressure conduit adjacent said suction tip, whereby obstruction of said aperture causes a reduction of the pressure in said pressure conduit, to actuate said pump control means to operate said pump, and removal of said obstruction causes said pressure to rise back toward essentially ambient pressure, to actuate said pump control means to shut said pump off.
Claim 7
Dependent Claim
89 words
The device of claim 1 in which said pressure control means comprises a squeeze bulb connected to an aperture of said pressure conduit adjacent said suction tip, said pressure conduit being pneumatically sealed from the exterior, whereby manual pressure on said squeeze bulb elevates the pressure in said pressure conduit, to actuate said pump control means to operate said pump, and removal of said manual pressure on said squeeze bulb causes pressure to fall back to essentially ambient pressure, actuating said pump control means to shut said pump off.
Claim 8
Dependent Claim
123 words
The device of claim 1 in which said pressure control means comprises a source for providing pressurized gas to said pressure conduit, said pressure conduit being essentially co-extensive with said suction tip and having an open aperture positioned next to said suction tip, whereby immersion of said suction tip and open aperture to a predetermined depth into a pool of liquid to be removed by suction will create a liquid pressure head against said open aperture, to correspondingly elevate the pressure within said pressure conduit, to actuate said pump control means to operate said pump, while lowering of said liquid pressure head causes the gas pressure in said pressure conduit to be reduced, actuating said pump control means to shut said pump off.
Claim 9
Dependent Claim
102 words
In the method of removing fluids from a surgical incision or the like by means of a suction tip and a mechanically-operated blood suction pump communicating with said tip through a length of tubing, the improvement which comprises: providing a flow of pressurized fluid through a conduit and through an aperture in said conduit adjacent said tip; and altering said pressure in said conduit by restricting flow through said aperture, to actuate pressure switch means communicating with said conduit and positioned remotely from said suction tip, to correspondingly actuate said suction pUmp by said pressure switch means when said suction is desired.
Claim 10
Dependent Claim
102 words
In the method of removing fluids from a surgical incision or the like by means of a suction tip and a mechanically-operated blood suction pump communicating with said tip through a length of tubing, the improvement which comprises: providing a flow of pressurized fluid through a conduit and through an aperture in said conduit adjacent said tip; and altering said pressure in said conduit by restricting flow through said aperture, to actuate pressure switch means communicating with said conduit and positioned remotely from said suction tip, to correspondingly actuate said suction pUmp by said pressure switch means when said suction is desired.
Claim 11
Dependent Claim
20 words
The surgical suction device of claim 8 in which said mechanically-operated blood suction pump is an electrically operated roller pump.
Claim 12
Dependent Claim
32 words
The method of claim 9 which comprises thereafter removing the restriction of flow from said aperture, to permit the opening of said pressure switch means to halt the operation of said pump.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-11-10 | 1979-05-12 | 1979-11-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-11-10 | 1983-05-12 | 1983-11-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-11-10 | 1987-05-12 | 1987-11-11 | $7700.00 | Window Closed / Lapsed |