Patent US3179962A successfully refreshed from Google Patents.
US3179962A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flotation apparatus and mechanical control therefor
Assignee: Individual
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Filing: 1963-12-24
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Granted: 1965-04-27
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Expires: 1983-12-24
Abstract
No abstract record available.
Inventors
- 👤 John C Shear
- 👤 Lester N Poust
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 02:42
CPC Classifications
F; F42; F42B; F42B22/00; F42B22/08; B; B63; B63B; B63B22/00; B63B22/04; B63B22/08; B63B22/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
184 words
FLOTATION APPARATUS WHICH COMPRISES, (A) A HOUSING HAVING AN OPENING THEREIN PERMITTING THE ENTRY OF WATER, (B) AN EXPANSIBLE CONTAINER MOUNTED WITHIN THE HOUSING, (C) A GAS SOURCE AND A FLOW CONTROL VALVE INCLUDING A CYLINDER HAVING AN AXIALLY MOVABLE PISTON THEREIN, (D) A FIRST GAS SUPPLY CONDUIT BETWEEN THE GAS SOURCE AND THE CYLINDER AND A SECOND GAS SUPPLY CONDUIT BETWEEN THE CYLINDER AND THE EXPANSIBLE CONTAINER, (E) A FIRST GAS REMOVAL CONDUIT BETWEEN THE EXPANSIBLE CONTAINER AND THE CYLINDER AND A SECOND GAS REMOVAL CONDUIT COMMUNICATING WITH THE CYLINDER, (F) SAID PISTON BEING FRICTIONALLY POSITIONED IN THE CYLINDER, (G) SAID CYLINDER HAVING SPRING BIASING MEANS AT ONE END ABUTTING THE PISTON AND AN APERTURE AT ITS OTHER END AND (H) A PASSAGEWAY IN THE PISTON WHICH IS OPERATIVE WHEN THE PISTON IS MOVED TOWARD SAID ONE END OF THE CYLINDER TO PLACE THE SUPPLY CONDUITS IN COMMUNICATION AND ADMIT GAS TO THE EXPANSIBLE CONTAINER AND OPERATIVE WHEN THE PISTON IS MOVED TOWARD SAID OTHER END OF THE CYLINDER TO PLACE THE REMOVAL CONDUITS IN COMMUNICATION AND EXIT GAS FROM THE EXPANSIBLE CONTAINER.
Claim 2
Dependent Claim
184 words
FLOTATION APPARATUS WHICH COMPRISES, (A) A HOUSING HAVING AN OPENING THEREIN PERMITTING THE ENTRY OF WATER, (B) AN EXPANSIBLE CONTAINER MOUNTED WITHIN THE HOUSING, (C) A GAS SOURCE AND A FLOW CONTROL VALVE INCLUDING A CYLINDER HAVING AN AXIALLY MOVABLE PISTON THEREIN, (D) A FIRST GAS SUPPLY CONDUIT BETWEEN THE GAS SOURCE AND THE CYLINDER AND A SECOND GAS SUPPLY CONDUIT BETWEEN THE CYLINDER AND THE EXPANSIBLE CONTAINER, (E) A FIRST GAS REMOVAL CONDUIT BETWEEN THE EXPANSIBLE CONTAINER AND THE CYLINDER AND A SECOND GAS REMOVAL CONDUIT COMMUNICATING WITH THE CYLINDER, (F) SAID PISTON BEING FRICTIONALLY POSITIONED IN THE CYLINDER, (G) SAID CYLINDER HAVING SPRING BIASING MEANS AT ONE END ABUTTING THE PISTON AND AN APERTURE AT ITS OTHER END AND (H) A PASSAGEWAY IN THE PISTON WHICH IS OPERATIVE WHEN THE PISTON IS MOVED TOWARD SAID ONE END OF THE CYLINDER TO PLACE THE SUPPLY CONDUITS IN COMMUNICATION AND ADMIT GAS TO THE EXPANSIBLE CONTAINER AND OPERATIVE WHEN THE PISTON IS MOVED TOWARD SAID OTHER END OF THE CYLINDER TO PLACE THE REMOVAL CONDUITS IN COMMUNICATION AND EXIT GAS FROM THE EXPANSIBLE CONTAINER.
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) | 1968-04-26 | 1968-10-26 | 1969-04-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-04-26 | 1972-10-26 | 1973-04-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-04-26 | 1976-10-26 | 1977-04-27 | $7700.00 | Window Closed / Lapsed |