US3768508A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Valve for controllable release of entrapped body fluids
Assignee: Baxter International Inc
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Filing: 1972-01-24
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Granted: 1973-10-30
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Expires: 1992-01-24
Abstract
Abstract A valve for controllably releasing entrapped body fluids, such as fluid from inside the skull of persons suffering from hydrocephalus. The valve includes a diaphragm which tends to close a valve seat and prevent flow of such fluid, and mechanical means for moving said diaphragm so as to open the valve to flow. The mechanical means may comprise a projection on the diaphragm which is contactible by a flexible portion of the body of the valve.
Inventors
- 👤 R Schulte
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 14:19
CPC Classifications
F; F16; F16K; F16K15/00; F16K15/14; F16K15/144; A; A61; A61M; A61M27/00; A61M27/002; A61M27/006; F16K15/1441; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7837; Y10T137/7876
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
152 words
A valve for controllably releasing entrapped body fluids, comprising: a body having an inner surface bounding a flow cavity therein, said body having a flexible portion which can be deflected into the cavity; a first and a second conduit entering said cavity through said body to provide for flow of fluid through the cavity; a valve seat in said cavity across which fluid must flow when flowing from one conduit to the other; a diaphragm extending across the cavity and having an imperforate portion overlaying the valve seat and so proportioned and arranged as to close the same in one position of the said imperforate portion and to leave it open in another position; and a projection on one of said flexible portion and diaphragm so disposed and arranged as to be contacted by the other, thereby to displace the diaphragm from the seat and permit fluid to flow across said seat.
Claim 2
Dependent Claim
152 words
A valve for controllably releasing entrapped body fluids, comprising: a body having an inner surface bounding a flow cavity therein, said body having a flexible portion which can be deflected into the cavity; a first and a second conduit entering said cavity through said body to provide for flow of fluid through the cavity; a valve seat in said cavity across which fluid must flow when flowing from one conduit to the other; a diaphragm extending across the cavity and having an imperforate portion overlaying the valve seat and so proportioned and arranged as to close the same in one position of the said imperforate portion and to leave it open in another position; and a projection on one of said flexible portion and diaphragm so disposed and arranged as to be contacted by the other, thereby to displace the diaphragm from the seat and permit fluid to flow across said seat.
Claim 3
Dependent Claim
45 words
A valve according to claim 1 in which the diaphragm is perforated outside the said imperforate region, whereby when the imperforate portion of the diaphragm is seated on the valve seat, its opposite sides are exposed to the pressure of respective ones of said conduits.
Claim 4
Dependent Claim
79 words
A valve according to claim 1 in which the valve seat is formed on said inner surface, with one of the conduits passing through the body inside said seat, the seat lying in a plane, and in which the projection is integral with the diaphragm and forms an oblique Lever relative to said plane, whereby pressing the said flexible portion of the body against the projection tilts the diaphragm so as to interrupt its seal with the valve seat.
Claim 5
Dependent Claim
22 words
A valve according to claim 3 in which the exterior portion of the body on which the valve seat lies is flat.
Claim 6
Dependent Claim
88 words
A valve according to claim 1 in which a barrier extends across the cavity, the valve seat being formed on said barrier with a flow port passing through the barrier within the valve seat, the diaphragm lying on one side of said barrier adjacent to said valve seat, and the projection being proportioned so as to enter the flow port in at least one position of the valve and having a cross-section less than that of said flow port so as to permit flow of fluid past it.
Claim 7
Dependent Claim
19 words
A valve according to claim 5 in which the projection is mounted to the flexible portion of the body.
Claim 8
Dependent Claim
15 words
A valve according to claim 5 in which the projection is mounted to the diaphragm.
Claim 9
Dependent Claim
46 words
A valve according to claim 7 in which a contact portion is mounted to the flexible portion to make contact with the projection, said contact portion forming bypass channels to form flow passages to the flow port when the contact portion is pressed against the barrier.
Claim 10
Dependent Claim
25 words
A valve according to claim 7 in which an enlargement is formed on the projection on the side of the barrier away from the diaphragm.
Claim 11
Dependent Claim
30 words
A valve according to claim 7 in which the outer surface of that portion of the body on the opposite side of the cavity from the flexible portion is flat.
Claim 12
Dependent Claim
46 words
A valve according to claim 10 in which a contact portion is mounted to the flexible portion to make contact with the projection, said contact portion forming bypass channels to form flow passages to the flow port when the contact portion is pressed against the barrier.
Claim 13
Dependent Claim
27 words
A valve according to claim 1 in which the diaphragm has an inherent structural strength tending to bias the imperforate portion toward and against the valve seat.
Claim 14
Dependent Claim
27 words
A valve according to claim 3 in which the diaphragm has an inherent structural strength tending to bias the imperforate portion toward and against the valve seat.
Claim 15
Dependent Claim
27 words
A valve according to claim 5 in which the diaphragm has an inherent structural strength tending to bias the imperforate portion toward and against the valve seat.
Claim 16
Dependent Claim
27 words
A valve according to claim 8 in which the diaphragm has an inherent structural strength tending to bias the imperforate portion toward and against the valve seat.
Claim 17
Dependent Claim
72 words
A valve according to claim 1 in which a lozenge having a cavity defined in part by a flexible wall portion, and having a pair of conduits entering into its cavity is connected to the cavity of the valve by means of a fluid connection between one of its conduits, and the conduit in the valve from which fluid flows after being released by displacement of the diaphragm from the valve seat.
Claim 18
Dependent Claim
34 words
A valve according to claim 1 in which a unidirectional check valve is fluidly connected to the conduit from which fluid flows after being released by displacement of the diaphragm from the valve seat.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-10-29 | 1977-04-30 | 1977-10-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-29 | 1981-04-30 | 1981-10-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-29 | 1985-04-30 | 1985-10-30 | $7700.00 | Window Closed / Lapsed |