US3783870A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Suction drainage device
Assignee: Sherwood Medical Co
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Filing: 1971-12-27
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Granted: 1974-01-08
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Expires: 1991-12-27
Abstract
Abstract A suction drainage device having a drainage collector chamber for connection to a pleural cavity, a series liquid seal chamber connecting the collector chamber with a pressure regulating manometer chamber, and a second manometer connected to the collector chamber in by-passing relation with the seal chamber having calibrations providing an indication of the pressure within the collector chamber, the pressure regulating chamber being connectable through a restricted orifice to the source of negative pressure to reduce the bubbling of air through the reservoir portion of the manometer.
Inventors
- 👤 E Schachet
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 09:07
CPC Classifications
A; A61; A61M; A61M1/00; A61M1/60; A61M1/61
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
195 words
In a suction drainage device including a pressure regulating liquid manometer includIng a chamber for receiving a liquid, said chamber being connected in fluid communication between an outlet adapted for connection in fluid communication with a source of negative pressure and atmosphere for controlling the negative pressure at the outlet, a drainage collector chamber connected to an inlet which is adapted to be connected in fluid comminication with a body cavity to be drained, and liquid seal means connected between the collector chamber and the outlet for passing gas from the collector chamber to the outlet, the improvement comprising a fluid pressure limiting member connected to said device in series fluid communication between the source of negative pressure and the outlet, said member having a restricted orifice therethrough for effecting a fluid pressure drop thereacross to substantially limit the fluid pressure at the outlet, and a second liquid manometer connected in fluid communication with the atmosphere and said inlet in by-passing relation with said liquid seal means, said second manometer including a chamber for receiving liquid and having calibration marks thereon for indicating the level of liquid therein and the pressure in the collector chamber.
Claim 2
Dependent Claim
195 words
In a suction drainage device including a pressure regulating liquid manometer includIng a chamber for receiving a liquid, said chamber being connected in fluid communication between an outlet adapted for connection in fluid communication with a source of negative pressure and atmosphere for controlling the negative pressure at the outlet, a drainage collector chamber connected to an inlet which is adapted to be connected in fluid comminication with a body cavity to be drained, and liquid seal means connected between the collector chamber and the outlet for passing gas from the collector chamber to the outlet, the improvement comprising a fluid pressure limiting member connected to said device in series fluid communication between the source of negative pressure and the outlet, said member having a restricted orifice therethrough for effecting a fluid pressure drop thereacross to substantially limit the fluid pressure at the outlet, and a second liquid manometer connected in fluid communication with the atmosphere and said inlet in by-passing relation with said liquid seal means, said second manometer including a chamber for receiving liquid and having calibration marks thereon for indicating the level of liquid therein and the pressure in the collector chamber.
Claim 3
Dependent Claim
15 words
The device according to claim 1 wherein said member is removably disposed in said outlet.
Claim 4
Dependent Claim
24 words
The device according to claim 2 wherein said orifice has a diameter of between about 0.016 of an inch and 0.028 of an inch.
Claim 5
Dependent Claim
23 words
The device according to claim 1 wherein said liquid seal means is disposed in series relation between said collector chamber and said outlet.
Claim 6
Dependent Claim
49 words
The device according to claim 1 wherein said pressure limiting members comprises a tube connector having a first portion removably secured in sealing engagement in the outlet and a second portion for frictional sealing engagement with a tube for connecting the outlet in fluid communication with the pressure source.
Claim 7
Dependent Claim
147 words
In a suction drainage device including a pressure regulating liquid manometer including a chamber for containing a liquid and connected in fluid communication between an outlet adapted for connection in fluid communication with a source of negative fluid pressure and atmosphere for controlling the negative pressure at the outlet, and an inlet which is adapted to be connected in fluid communication with a body cavity to be drained, the combination therewith comprising a drainage collector chamber connected to the inlet, liquid seal means connected between said drainage collector chamber and said outlet for passing gas between said drainage collector chamber and said outlet, and a second liquid manometer connected in fluid communication with said inlet and in by-passing relation with said liquid seal means, said second manometer having calibration marks thereon providing a visual indication of the level of liquid therein and the pressure at said inlet.
Claim 8
Dependent Claim
147 words
In a suction drainage device including a pressure regulating liquid manometer including a chamber for containing a liquid and connected in fluid communication between an outlet adapted for connection in fluid communication with a source of negative fluid pressure and atmosphere for controlling the negative pressure at the outlet, and an inlet which is adapted to be connected in fluid communication with a body cavity to be drained, the combination therewith comprising a drainage collector chamber connected to the inlet, liquid seal means connected between said drainage collector chamber and said outlet for passing gas between said drainage collector chamber and said outlet, and a second liquid manometer connected in fluid communication with said inlet and in by-passing relation with said liquid seal means, said second manometer having calibration marks thereon providing a visual indication of the level of liquid therein and the pressure at said inlet.
Claim 9
Dependent Claim
63 words
The device according to claim 6 wherein said second manometer includes first and second channels for receiving a liquid, each having an upper end and a lower end, said lower ends being interconnected in fluid communication, the upper end of said first channel being connected in direct fluid communication with said inlet, and the upper end of said second channel communicatating with atmosphere.
Claim 10
Dependent Claim
38 words
The device according to claim 7 wherein said liquid seal means includes a compartment adapted to receive a liquid and which extends below said dtainage chamber and is disposed laterally between said regulating manometer and said second manometer.
Claim 11
Dependent Claim
32 words
The device according to claim 7 further including restricted orifice means disposed between said regulating manometer and the source of negative pressure for limiting the negative pressure applied to said regulating manometer.
Claim 12
Dependent Claim
24 words
The device according to claim 9 wherein said orifice means includes a tube connector adapted for connection between said outlet and said regulating manometer.
Claim 13
Dependent Claim
19 words
The device according to claim 7 wherein said first channel has a transparent wall with said calibration marks tHereon.
Claim 14
Dependent Claim
17 words
The device according to claim 11 wherein said lower ends are interconnected by a liquid reservoir chamber.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-01-07 | 1977-07-09 | 1978-01-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-07 | 1981-07-09 | 1982-01-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-07 | 1985-07-09 | 1986-01-08 | $7700.00 | Window Closed / Lapsed |