Patent US3110783A successfully refreshed from Google Patents.
US3110783A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydraulically operated circuit breaker
Assignee: Westinghouse Electric Corp
•
Filing: 1961-03-15
•
Granted: 1963-11-12
•
Expires: 1981-03-15
Abstract
No abstract record available.
Inventors
- 👤 Albert P Strom
- 👤 William H Fischer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 17:57
CPC Classifications
H; H01; H01H; H01H33/00; H01H33/02; H01H33/28; H01H33/30; H01H33/34
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
88 words
A CIRCUIT BREAKER COMPRISING A PAIR OF RELATIVELY MOVABLE CONTACTS, OPERATING MEANS FOR SAID CONTACTS COMPRISING A CYLINDER AND A PISTON MOVABLE WITHIN SAID CYLINDER TO OPEN AND CLOSE SAID CONTACTS, MEANS OPERABLE TO SUPPLY FLUID UNDER PRESSURE TO SAID CYLINDER ON BOTH SIDES OF SAID PISTON TO MAINTAIN SAID CONTACTS CLOSED, FLUID PRESSURE OPERATED CONSTANT-FLOW VALVE MEANS OPERABLE TO VENT FLUID PRESSURE FROM ONE SIDE OF SAID PISTON TO EFFECT OPENING OF SAID CONTACTS, AND VALVE MEANS FOR ADMITTING FLUID PRESSURE TO OPERATE SAID CONSTANT-FLOW VALVE MEANS.
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) | 1966-11-11 | 1967-05-13 | 1967-11-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-11-11 | 1971-05-13 | 1971-11-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-11-11 | 1975-05-13 | 1975-11-12 | $7700.00 | Window Closed / Lapsed |