Patent US3331935A successfully refreshed from Google Patents.
US3331935A
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US
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Gas-blast circuit breaker having dual piston means providing double-acting puffer arrangement
Assignee: Westinghouse Electric Corp
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Filing: 1964-12-21
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Granted: 1967-07-18
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Expires: 1984-12-21
Abstract
No abstract record available.
Inventors
- 👤 Stanislaw A Milianowicz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 21:39
CPC Classifications
H; H01; H01H; H01H33/00; H01H33/70; H01H33/88; H01H33/90; H01H33/905; H01H2033/908
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
118 words
A CIRCUIT BREAKER COMPRISING A TANK CONTAINING AN INTERRUPTING GAS, AT LEAST TWO INTERRUPTER UNITS DISPOSED INSIDE THE TANK, A CONDUCTING CROSS ARM FOR CONNECTING THE INTERRUPTER UNITS IN SERIES, EACH INTERRUPTER UNIT COMPRISING A CYLINDER, A PRIMARY PISTON AND A SECONDARY PISTON DISPOSED INSIDE THE CYLINDER, AN ACCELERATING SPRING FOR DRIVING THE PRIMARY PISTON IN ONE DIRECTION FROM AN INITIAL POSITION, A SECONDARY SPRING FOR DRIVING THE SECONDARY PISTON TOWARD THE PRIMARY PISTON FROM AN INITIAL POSITION TO COMPRESS GAS BETWEEN THE PISTON, SAID SECONDARY PISTON BEING RETURNED TO ITS INITIAL POSITION BY THE COMPRESSED GAS, AND MEANS FOR RAISING THE CROSS ARM TO COMPRESS THE ACCELERATING SPRING AND RETURN THE PRIMARY PISTON TO ITS INITIAL POSITION.
Claim 2
Dependent Claim
118 words
A CIRCUIT BREAKER COMPRISING A TANK CONTAINING AN INTERRUPTING GAS, AT LEAST TWO INTERRUPTER UNITS DISPOSED INSIDE THE TANK, A CONDUCTING CROSS ARM FOR CONNECTING THE INTERRUPTER UNITS IN SERIES, EACH INTERRUPTER UNIT COMPRISING A CYLINDER, A PRIMARY PISTON AND A SECONDARY PISTON DISPOSED INSIDE THE CYLINDER, AN ACCELERATING SPRING FOR DRIVING THE PRIMARY PISTON IN ONE DIRECTION FROM AN INITIAL POSITION, A SECONDARY SPRING FOR DRIVING THE SECONDARY PISTON TOWARD THE PRIMARY PISTON FROM AN INITIAL POSITION TO COMPRESS GAS BETWEEN THE PISTON, SAID SECONDARY PISTON BEING RETURNED TO ITS INITIAL POSITION BY THE COMPRESSED GAS, AND MEANS FOR RAISING THE CROSS ARM TO COMPRESS THE ACCELERATING SPRING AND RETURN THE PRIMARY PISTON TO ITS INITIAL POSITION.
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) | 1970-07-17 | 1971-01-16 | 1971-07-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-07-17 | 1975-01-16 | 1975-07-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-07-17 | 1979-01-16 | 1979-07-18 | $7700.00 | Window Closed / Lapsed |