US4706830A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vacuum bottle with pressure indicator
Assignee: Ethicon Inc
•
Filing: 1982-06-21
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Granted: 1987-11-17
•
Expires: 2002-06-21
Abstract
Abstract A vacuum drainage bottle includes a chamber for receiving fluids from a patient and a pressure indicator (9,21) for measuring the pressure in the chamber. Prior to use, the pressure indicator is isolated from the chamber by means of a breakable seal. The seal may be in the form of a recessed membrane (43), which may be ruptured by depressing the pressure indicator, causing a ball (45) to bear against the membrane (43).
Inventors
- 👤 Mark V. Wareing
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 08:35
CPC Classifications
A; A61; A61M; A61M1/00; A61M1/64; A61M1/66; A61M1/71; A61M1/73; A61M1/732; Y; Y10; Y10S; Y10S215/00; Y10S215/03
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
68 words
A vacuum drainage bottle having a chamber for receiving fluids drained from a patient comprising, a connector to receive fluids from a patient, and a pressure indicator separate from said connector and separated from communication with said chamber by sealing means isolated from the atmosphere and which are releasable prior to connecting said bottle to a wound drainage tube in order to indicate the pressure in said bottle.
Claim 2
Dependent Claim
68 words
A vacuum drainage bottle having a chamber for receiving fluids drained from a patient comprising, a connector to receive fluids from a patient, and a pressure indicator separate from said connector and separated from communication with said chamber by sealing means isolated from the atmosphere and which are releasable prior to connecting said bottle to a wound drainage tube in order to indicate the pressure in said bottle.
Claim 3
Dependent Claim
15 words
A vacuum drainage bottle according to claim 1 wherein the sealing means is irreversibly releasable.
Claim 4
Dependent Claim
25 words
A vacuum drainage bottle according to claim 2 wherein the sealing means comprises an impermeable membrane which has means associated therewith for rupturing the membrane.
Claim 5
Dependent Claim
24 words
A vacuum drainage bottle according to claim 3 wherein the rupturing means is a ball, and the membrane is recessed to receive the ball.
Claim 6
Dependent Claim
46 words
A vacuum drainage bottle according to claim 2 wherein the sealing means comprises a spigot of frangible material, the spigot having a hollow interior which is in communication with the drainage chamber, but separated from communication with the pressure indicator by the material of the spigot.
Claim 7
Dependent Claim
34 words
A vacuum drainage bottle according to claim 1 wherein the pressure indicator includes a pressure-responsive part in the form of an elastomeric diaphragm, the configuration of which depends on the pressure difference across it.
Claim 8
Dependent Claim
70 words
A vacuum drainage bottle according to claim 6 wherein the external surface of the diaphragm is convex in shape when the pressure difference across the diaphragm is zero, and under such conditions the radius of curvature of the internal surface of the diaphragm is sufficiently smaller than the radius of curvature of the said external surface to ensure a continuous response of the diaphragm to changes in pressure across it.
Claim 9
Dependent Claim
16 words
A vacuum drainage bottle according to claim 7 wherein the diaphragm carries a pointer positioned off-centre.
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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) | 1990-11-16 | 1991-05-18 | 1991-11-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-11-16 | 1995-05-18 | 1995-11-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-11-16 | 1999-05-18 | 1999-11-17 | $7700.00 | Window Closed / Lapsed |