US3605812A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multiple way stopcocks
Assignee: Quickfit and Quartz Ltd
•
Filing: 1969-09-29
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Granted: 1971-09-20
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Expires: 1989-09-29
Abstract
Abstract A COCK COMPRISING A BODY WITH INLET AND OUTLET PORTS, A BORE THROUGH THE BODY HAVING AN OBTURATING ASSEMBLY SLIDABLE THEREIN, EITHER ROTATABLY OR LONGITUDINALLY, THE OBTURATING ASSMBLY HAVING A LINER, A CLAMPING DEVICE WITHIN AND SPACED FROM THE LINER, AND ELASTOMER E.G. POLYTETRAFLUOROETHYLENE FILLING THE SPACE, GLANDS AND A DEVICE OPERABLE TO VARY THE LENGTH OF THE CLAMPING DEVICE WITH THE GLANDS ENGAGING THE ENDS OF THE ELASTOMER FILLING TO VARY THE RADIAL PRESSURE OF THE LINER AGAINST THE WALLS OF THE BODY BORE, AND GROOVING IN THE LINER TO PROVIDE FOR FLUID FLOW BETWEEN THE INLET AND THE OUTLET PORTS.
Inventors
- 👤 Wilhelm Anton Richter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 09:30
CPC Classifications
F; F16; F16K; F16K11/00; F16K11/02; F16K11/06; F16K11/065; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/86919
Claims Analysis
Total Claims: 0
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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) | 1974-09-19 | 1975-03-21 | 1975-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-19 | 1979-03-21 | 1979-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-19 | 1983-03-21 | 1983-09-20 | $7700.00 | Window Closed / Lapsed |