Patent US3159176A successfully refreshed from Google Patents.
US3159176A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Check-relief valve
Assignee: Vernay Laboratories Inc
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Filing: 1962-12-07
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Granted: 1964-12-01
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Expires: 1982-12-07
Abstract
No abstract record available.
Inventors
- 👤 Norton A Russell
- 👤 Robert T Gifford
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:07
CPC Classifications
B; B60; B60T; B60T11/00; B60T11/10; B60T11/28; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7771; Y10T137/7772; Y10T137/7837; Y10T137/7879; Y10T137/788; Y10T137/7882
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
187 words
A RESILIENT UNITARY CHECK-RELIEF VALVE ELEMENT COMPRISING A TUBULAR BODY PORTION HAVING MEANS FOR ENGAGING IT IN AN APERTURE IN A PLATE OR THE LIK, A DUCK BILL PORTION EXTENDING FROM ONE END OF SAID TUBULAR BODY PORTION, SAID DUCK BILL PORTION COMPRISING A PAIR OF RESILIENT LIPS, AND A RESILIENT UMBRELLA PORTION EXTENDING ANNULARLY FROM THE OTHER END OF SAID TUBULAR BODY PORTION, THE SAID RESILIENT LIPS OF SAID DUCK BILL PORTION SEPARATING TO PERMIT FLUID FLOW IN ONE DIRECTION AND CLOSING TO CHECK FLUID FLOW IN THE OPPOSITE DIRECTION, SAID RESILIENT UMBRELLA PORTION BEING ADAPTED TO BEAR AGAINST ONE SIDE OF THE PLATE OR THE LIKE IN WHICH SAID RESILIENT UNITARY CHECK-RELIEF VALVE ELEMENT IS ENGAGED, AND BY-PASS MEANS EXTENDING FROM THE OTHER SIDE OF THE PLATE OR THE LIKE TO SAID RESILIENT UMBRELLA PORTION, SAID RESILIENT UMBRELLA PORTION NORMALLY CHECKING FLUID FLOW BOTH IN SAID ONE DIRECTION AND IN SAID OPPOSITE DIRECTION, AND SAID RESILIENT UMBRELLA PORTION FLEXING SO AS TO PERMIT FLUID TO FLOW AROUND THE PERIPHERY THEREOF IN SAID OPPOSITE DIRECTION WHEN THE PRESSURE IN SAID BY-PASS MEANS REACHES A PREDETERMINED AMOUNT.
Claim 2
Dependent Claim
187 words
A RESILIENT UNITARY CHECK-RELIEF VALVE ELEMENT COMPRISING A TUBULAR BODY PORTION HAVING MEANS FOR ENGAGING IT IN AN APERTURE IN A PLATE OR THE LIK, A DUCK BILL PORTION EXTENDING FROM ONE END OF SAID TUBULAR BODY PORTION, SAID DUCK BILL PORTION COMPRISING A PAIR OF RESILIENT LIPS, AND A RESILIENT UMBRELLA PORTION EXTENDING ANNULARLY FROM THE OTHER END OF SAID TUBULAR BODY PORTION, THE SAID RESILIENT LIPS OF SAID DUCK BILL PORTION SEPARATING TO PERMIT FLUID FLOW IN ONE DIRECTION AND CLOSING TO CHECK FLUID FLOW IN THE OPPOSITE DIRECTION, SAID RESILIENT UMBRELLA PORTION BEING ADAPTED TO BEAR AGAINST ONE SIDE OF THE PLATE OR THE LIKE IN WHICH SAID RESILIENT UNITARY CHECK-RELIEF VALVE ELEMENT IS ENGAGED, AND BY-PASS MEANS EXTENDING FROM THE OTHER SIDE OF THE PLATE OR THE LIKE TO SAID RESILIENT UMBRELLA PORTION, SAID RESILIENT UMBRELLA PORTION NORMALLY CHECKING FLUID FLOW BOTH IN SAID ONE DIRECTION AND IN SAID OPPOSITE DIRECTION, AND SAID RESILIENT UMBRELLA PORTION FLEXING SO AS TO PERMIT FLUID TO FLOW AROUND THE PERIPHERY THEREOF IN SAID OPPOSITE DIRECTION WHEN THE PRESSURE IN SAID BY-PASS MEANS REACHES A PREDETERMINED AMOUNT.
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) | 1967-12-01 | 1968-06-01 | 1968-12-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-12-01 | 1972-06-01 | 1972-12-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-12-01 | 1976-06-01 | 1976-12-01 | $7700.00 | Window Closed / Lapsed |