US3586041A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flutter check valve
Assignee: CR Bard Inc
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Filing: 1970-01-07
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Granted: 1971-06-22
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Expires: 1990-01-07
Abstract
Abstract A flutter check valve designed for use particularly in a body fluid drainage system, such as a closed urinary drainage system, comprising a relatively rigid frame having an opening in communication with the outlet end of a drainage conduit and a flexible film secured to the frame and covering the opening in a position to be pushed away from the opening by fluid from the drainage conduit and to thereafter return to closing position, preventing backflow of fluid into the conduit.
Inventors
- 👤 Martin Monestere
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 13:10
CPC Classifications
A; A61; A61F; A61F5/00; A61F5/44; A61F5/4404; A61F5/4405; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7837; Y10T137/7879; Y10T137/7888
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
71 words
A one-way valve comprising an inlet conduit terminating in an aperture, a frame surrounding said aperture, and a movable element secured to said frame in a position to cover said aperture, said movable element being in the form of a pleated flexible sheet and one end of the pleat extending to an edge of the sheet which is free to move toward and away from the adjacent portion of the frame.
Claim 2
Dependent Claim
71 words
A one-way valve comprising an inlet conduit terminating in an aperture, a frame surrounding said aperture, and a movable element secured to said frame in a position to cover said aperture, said movable element being in the form of a pleated flexible sheet and one end of the pleat extending to an edge of the sheet which is free to move toward and away from the adjacent portion of the frame.
Claim 3
Dependent Claim
35 words
A valve according to claim 1 in which the inlet conduit includes a part forming an enlarged chamber and a smaller part projecting downwardly into said chamber and spaced from the walls of said chamber.
Claim 4
Dependent Claim
33 words
A valve according to claim 1 in which said pleated sheet lies normally in a generally vertical direction and is secured to the frame along the upper and lateral edges of said sheet.
Claim 5
Dependent Claim
42 words
A valve according to claim 3 in which the pleat is constituted by a flat fold of Z-form in cross section and in which two adjacent surfaces of the folded material are secured together at least adjacent the vertical middle portion thereof.
Claim 6
Dependent Claim
33 words
A valve according to claim 1 in which the frame is constituted by a flat vertically disposed wall and which includes vertically disposed forwardly projecting wings along each side edge of said wall.
Claim 7
Dependent Claim
25 words
A valve according to claim 5 in which said pleated sheet is secured to said wall along the upper and lateral edges of said sheet.
Claim 8
Dependent Claim
41 words
A valve according to claim 2 in which the enlarged chamber is basically bell-shaped and is truncated at an acute angle to its vertical axis, the opening thus formed being bounded by the frame to which the pleated sheet is secured.
Claim 9
Dependent Claim
25 words
A valve according to claim 7 in which said pleated sheet is secured to said frame along the upper and lateral edges of said sheet.
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) | 1974-06-21 | 1974-12-21 | 1975-06-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-21 | 1978-12-21 | 1979-06-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-21 | 1982-12-21 | 1983-06-22 | $7700.00 | Window Closed / Lapsed |