Patent US3089285A successfully refreshed from Google Patents.
US3089285A
Expired / Lapsed
US
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Abrasive blasting apparatus
Assignee: Pangborn Corp
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Filing: 1962-04-19
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Granted: 1963-05-14
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Expires: 1982-04-19
Abstract
No abstract record available.
Inventors
- 👤 Ralph W Moore
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 09:23
CPC Classifications
B; B24; B24C; B24C7/00; B24C7/0046
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
134 words
A PRESSURE-RESPONSIVE MIXING DEVICE FOR CONTROLLING THE FLOW OF A STREAM OF PARTICLES FROM A SUPPLY TANK, SAID DEVICE INCLUDING A FLOW CONDUIT, A TUBULAR MEMBER HAVING ITS UPPER PORTION PROJECTING INTO THE CONDUIT AND PROVIDING A DISCHARGE PATH FOR THE CONDUIT, A RUBBER VALVE SEAT IN SAID CONDUIT ABOVE THE UPPER PORTION OF THE TUBULAR MEMBER, A SPRING FOR UPWARDLY BIASING THE TUBULAR MEMBER AGAINST THE VALVE SEAT, TWO SPACED PRESSURE-RESPONSIVE DIAPHRAGMS HOLDING THE TUBULAR MEMBER IN PLACE, AND A PRESSURE APPLYING CONNECTION FOR CAUSING CHANGES IN PRESSURE TO RAISE AND LOWER THE TUBULAR MEMBER AGAINST AND AWAY FROM THE VALVE SEAT, ONE OF SAID DIAPHRAGMS HAVING ONE FACE EXPOSED TO THE CONDUIT WHILE THE SECOND DIAPHRAGM HAS THE OPPOSITE FACE EXPOSED TO THE PRESSUREAPPLYING CONNECTION, THE TOTAL MOVING AREA OF THE SECOND
Claim 2
Dependent Claim
134 words
A PRESSURE-RESPONSIVE MIXING DEVICE FOR CONTROLLING THE FLOW OF A STREAM OF PARTICLES FROM A SUPPLY TANK, SAID DEVICE INCLUDING A FLOW CONDUIT, A TUBULAR MEMBER HAVING ITS UPPER PORTION PROJECTING INTO THE CONDUIT AND PROVIDING A DISCHARGE PATH FOR THE CONDUIT, A RUBBER VALVE SEAT IN SAID CONDUIT ABOVE THE UPPER PORTION OF THE TUBULAR MEMBER, A SPRING FOR UPWARDLY BIASING THE TUBULAR MEMBER AGAINST THE VALVE SEAT, TWO SPACED PRESSURE-RESPONSIVE DIAPHRAGMS HOLDING THE TUBULAR MEMBER IN PLACE, AND A PRESSURE APPLYING CONNECTION FOR CAUSING CHANGES IN PRESSURE TO RAISE AND LOWER THE TUBULAR MEMBER AGAINST AND AWAY FROM THE VALVE SEAT, ONE OF SAID DIAPHRAGMS HAVING ONE FACE EXPOSED TO THE CONDUIT WHILE THE SECOND DIAPHRAGM HAS THE OPPOSITE FACE EXPOSED TO THE PRESSUREAPPLYING CONNECTION, THE TOTAL MOVING AREA OF THE SECOND
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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) | 1966-05-13 | 1966-11-12 | 1967-05-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-05-13 | 1970-11-12 | 1971-05-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-05-13 | 1974-11-12 | 1975-05-14 | $7700.00 | Window Closed / Lapsed |