US3154486A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Check valve and filter
Assignee: Graning Enameling Co
•
Filing: 1962-07-16
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Granted: 1964-10-27
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Expires: 1982-07-16
Abstract
No abstract record available.
Inventors
- 👤 Paul J Weaver
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:50
CPC Classifications
F; F16; F16K; F16K15/00; F16K15/14; F16K15/141; F16K15/142; F16K15/1401; F16K17/00; F16K17/02; Y; Y10; Y10T; Y10T137/00; Y10T137/7504; Y10T137/7613; Y10T137/7722; Y10T137/7837; Y10T137/7838; Y10T137/7839; Y10T137/7859; Y10T137/7861
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
176 words
A COMBINATION CHECK VALVE AND FILTER ASSEMBLY COMPRISING: A HOUSING HAVING AN INTERIOR CHAMBER, AN INLET PORT, AN OUTLET PORT, AND A CHAMBER PORT, ALL OF SAID PORTS EXTENDING THROUGH THE HOUSING AND OPENING INTO THE CHAMBER; AN ITNERNAL THREAD DISPOSED ON THE INTERIOR WALL OF SAID CHAMBER AT A MEDIAL POINT THEREOF SO AS TO DIVIDE THE CHAMBER INTO A FILTER CHAMBER AND A CHECK VALVE CHAMBER; AN INSERT HAVING A HEAD, AND A CENTRAL BORE AND COUNTERBORE, SAID BORES EXTENDING INTO THE INSERT FROM THE END THEREOF REMOTE FROM THE HEAD; AN EXTERNAL THREAD ON SAID INSERT ADAPTED TO ENGAGE THE INTERNAL THREAD OF THE HOUSING, THE BORES OPENING INTO THE FILTER CHAMBER AND THE HEAD PROJECTING THROUGH THE CHAMBER PORT AND BEYOND THE HOUSING; A TUBULAR POROUS FILTER ELEMENT SEATED IN THE COUNTERBORE AND EXTENDING INTO THE FILTER CHAMBER; A FLEXIBLE PAD IN FLUID-SEALING CONTACT BETWEEN THE CHAMBER WALL AND THE END OF THE FILTER ELEMENT REMOTE FROM THE INSERT, THE INLET PORT OPENING INTO THE FILTER CHAMBER THEREBY TO DISCHARGE TOWARD THE
Claim 2
Dependent Claim
176 words
A COMBINATION CHECK VALVE AND FILTER ASSEMBLY COMPRISING: A HOUSING HAVING AN INTERIOR CHAMBER, AN INLET PORT, AN OUTLET PORT, AND A CHAMBER PORT, ALL OF SAID PORTS EXTENDING THROUGH THE HOUSING AND OPENING INTO THE CHAMBER; AN ITNERNAL THREAD DISPOSED ON THE INTERIOR WALL OF SAID CHAMBER AT A MEDIAL POINT THEREOF SO AS TO DIVIDE THE CHAMBER INTO A FILTER CHAMBER AND A CHECK VALVE CHAMBER; AN INSERT HAVING A HEAD, AND A CENTRAL BORE AND COUNTERBORE, SAID BORES EXTENDING INTO THE INSERT FROM THE END THEREOF REMOTE FROM THE HEAD; AN EXTERNAL THREAD ON SAID INSERT ADAPTED TO ENGAGE THE INTERNAL THREAD OF THE HOUSING, THE BORES OPENING INTO THE FILTER CHAMBER AND THE HEAD PROJECTING THROUGH THE CHAMBER PORT AND BEYOND THE HOUSING; A TUBULAR POROUS FILTER ELEMENT SEATED IN THE COUNTERBORE AND EXTENDING INTO THE FILTER CHAMBER; A FLEXIBLE PAD IN FLUID-SEALING CONTACT BETWEEN THE CHAMBER WALL AND THE END OF THE FILTER ELEMENT REMOTE FROM THE INSERT, THE INLET PORT OPENING INTO THE FILTER CHAMBER THEREBY TO DISCHARGE TOWARD THE
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-10-27 | 1968-04-27 | 1968-10-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-10-27 | 1972-04-27 | 1972-10-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-10-27 | 1976-04-27 | 1976-10-27 | $7700.00 | Window Closed / Lapsed |