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Patent US3085591A successfully refreshed from Google Patents.
US3085591A
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Exhalation valve
Assignee: MSA Safety Inc
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Filing: 1960-08-22
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Granted: 1963-04-16
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Expires: 1980-08-22
Abstract
No abstract record available.
Inventors
- 👤 John H Schneider
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:06
CPC Classifications
A; A62; A62B; A62B18/00; A62B18/08; A62B18/10; F; F16; F16K; F16K15/00; F16K15/14; F16K15/144; F16K15/148; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7837; Y10T137/7879; Y10T137/7888; Y10T137/789
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
100 words
A ONE-WAY BREATHING VALVE COMPRISING A TUBULAR HOUSING HAVING A PERIPHERAL VALVE SEAT ON ONE END THEREOF, A SPIDER CONNECTED WITHIN AND EXTENDING ACROSS SAID HOUSING, SAID SPIDER HAVING RESILIENT LEGS AND A HUB, SAID HUB EXTENDING BEYOND THE END OF SAID HOUSING, A RESILIENT DISC VALVE HEAD CONNECTED TO SAID HUB AND SPACED FROM SAID VALVE SEAT, A CAP MEANS ADAPTED TO ENGAGE SAID HOUSING AND AXIALLY DISPLACE SAID HUB TO A FIXED OPERATING POSITION TO ENGAGE SAID HEAD AND SEAT, AND SAID VALVE HEAD FLEXING IN RESPONSE TO A PRESSURE DIFFERENTIAL ACROSS IT TO DISENGAGE FROM SAID SEAT.
Claim 2
Dependent Claim
100 words
A ONE-WAY BREATHING VALVE COMPRISING A TUBULAR HOUSING HAVING A PERIPHERAL VALVE SEAT ON ONE END THEREOF, A SPIDER CONNECTED WITHIN AND EXTENDING ACROSS SAID HOUSING, SAID SPIDER HAVING RESILIENT LEGS AND A HUB, SAID HUB EXTENDING BEYOND THE END OF SAID HOUSING, A RESILIENT DISC VALVE HEAD CONNECTED TO SAID HUB AND SPACED FROM SAID VALVE SEAT, A CAP MEANS ADAPTED TO ENGAGE SAID HOUSING AND AXIALLY DISPLACE SAID HUB TO A FIXED OPERATING POSITION TO ENGAGE SAID HEAD AND SEAT, AND SAID VALVE HEAD FLEXING IN RESPONSE TO A PRESSURE DIFFERENTIAL ACROSS IT TO DISENGAGE FROM SAID SEAT.
References Cited (Backward Citations)
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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) | 1966-04-15 | 1966-10-15 | 1967-04-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-04-15 | 1970-10-15 | 1971-04-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-04-15 | 1974-10-15 | 1975-04-16 | $7700.00 | Window Closed / Lapsed |