Patent US2784851A successfully refreshed from Google Patents.
US3403696A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Silent check-valve
Assignee: Individual
•
Filing: 1966-10-20
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Granted: 1968-10-01
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Expires: 1986-10-20
Abstract
No abstract record available.
Inventors
- 👤 Pynchon George
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 09:33
CPC Classifications
F; F16; F16K; F16K15/00; F16K15/14; F16K15/148; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7837; Y10T137/7859; Y10T137/786; Y10T137/7861; Y10T137/7862; Y10T137/7879; Y10T137/7888; Y10T137/789
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
165 words
A SILENT CHECK-VALVE ADAPTED TO CONTROL FLUID FLOW IN A PIPE LINE, COMPRISING IN COMBINATION: (A) A HOLLOW CYLINDRICAL BODY, HAVING A THREADED BORE THERETHROUGH, ADAPTED TO BE INSERTED IN A PIPE LINE; (B) A RIGID, NON-VIBRATILE, PLASTIC DISC HAVING A THREADED PERIPHERAL EDGE, THREADEDLY MOUNTED IN THE BODY BORE INTERMEDIATE THE ENDS THEREOF; THE DISC HAVING A PARALLEL LOWER AND UPPER FACES DEFINING A VALVE SEAT HAVING A CENTRAL VALVE STEM BORE SURROUNDED BY A PLURALITY OF SPACED FLUID PASSAGES; (C) THE BODY WALL BEING CIRCUMFERENTIALLY DISPLACED INWARDLY, AT THE DISC, TO EFFECT PLASTC FLOW OF THE THREADED DISC EDGE, AND LOCK THE DISC AGAINST ROTATION AND CREATE A FLUID-TIGHT SEAL BETWEEN THE DISC AND THE BODY BORE WALL; AND, (D) A UNITARY VALVE-HEAD, FABRICATED FROM INHERENTLY RESILIENT, NON-VIBRATILE, PLASTIC MATERIAL, HAVING A CIRCULAR CAP TAPERED TO A CIRCUMFERENTIAL FEATHERED EDGE, AND A DEPENDENT MOUNTING STEM HAVING A FRUSTOCONICAL RETAINING BOTTOM AT THE LOWER END THEREOF TERMINATING, AT ITS APEX, IN AN ELONGATED TAIL;
Claim 2
Dependent Claim
165 words
A SILENT CHECK-VALVE ADAPTED TO CONTROL FLUID FLOW IN A PIPE LINE, COMPRISING IN COMBINATION: (A) A HOLLOW CYLINDRICAL BODY, HAVING A THREADED BORE THERETHROUGH, ADAPTED TO BE INSERTED IN A PIPE LINE; (B) A RIGID, NON-VIBRATILE, PLASTIC DISC HAVING A THREADED PERIPHERAL EDGE, THREADEDLY MOUNTED IN THE BODY BORE INTERMEDIATE THE ENDS THEREOF; THE DISC HAVING A PARALLEL LOWER AND UPPER FACES DEFINING A VALVE SEAT HAVING A CENTRAL VALVE STEM BORE SURROUNDED BY A PLURALITY OF SPACED FLUID PASSAGES; (C) THE BODY WALL BEING CIRCUMFERENTIALLY DISPLACED INWARDLY, AT THE DISC, TO EFFECT PLASTC FLOW OF THE THREADED DISC EDGE, AND LOCK THE DISC AGAINST ROTATION AND CREATE A FLUID-TIGHT SEAL BETWEEN THE DISC AND THE BODY BORE WALL; AND, (D) A UNITARY VALVE-HEAD, FABRICATED FROM INHERENTLY RESILIENT, NON-VIBRATILE, PLASTIC MATERIAL, HAVING A CIRCULAR CAP TAPERED TO A CIRCUMFERENTIAL FEATHERED EDGE, AND A DEPENDENT MOUNTING STEM HAVING A FRUSTOCONICAL RETAINING BOTTOM AT THE LOWER END THEREOF TERMINATING, AT ITS APEX, IN AN ELONGATED TAIL;
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) | 1971-10-01 | 1972-04-01 | 1972-10-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-10-01 | 1976-04-01 | 1976-10-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-10-01 | 1980-04-01 | 1980-10-01 | $7700.00 | Window Closed / Lapsed |