US3588131A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sealing means
Assignee: CORRUGATED PACKING AND SHEET METAL CO Ltd
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Filing: 1968-01-02
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Granted: 1971-06-28
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Expires: 1988-01-02
Abstract
Abstract A SEALING WASHER OR GASKET HAS A HOLLOW SECTION FORMED BY WALLS WHICH CONVERGE BUT LEAVE AT LEAST ONE OPENING BETWEEN THE HOLLOW SECTION AND THE HIGH-PRESSURE SIDE OF THE SEAL SO THAT AN INCREASE IN FLUID PRESSURE HAS THE EFFECT OF URGING THE WALLS OUTWARDLY THUS TENDING TO INCREASE THE SEALING PRESSURE WITH THE SURFACES BETWEEN WHICH IT IS LOCATED. MEANS ARE PROVIDED TO PREVENT THE OPENING BEING ENTIRELY CLOSED BY THE NORMAL PRESSURES USED TO CLAMP THE PARTS SEALED BY THE WASHER OR GASKET.
Inventors
- 👤 Terence P Nicholson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 20:10
CPC Classifications
F; F16; F16J; F16J15/00; F16J15/46; F16J15/48; F16L; F16L17/00; F16L17/06; F16L17/067; F16L17/073
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) | 1974-06-27 | 1974-12-27 | 1975-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-27 | 1978-12-27 | 1979-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-27 | 1982-12-27 | 1983-06-28 | $7700.00 | Window Closed / Lapsed |