US3566062A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heater arrangement for sf-6 circuit breakers
Assignee: ABB Inc USA
•
Filing: 1969-07-28
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Granted: 1971-02-23
•
Expires: 1989-07-28
Abstract
Abstract Heaters are disposed uniformly over the exterior of highpressure sulfur hexafluoride tanks which supply high-pressure sulfur hexafluoride gas to three interrupter tanks, which contain interrupter structures. A gas recirculating system is provided for drying and cleaning gas which circulates between a highpressure and low-pressure system.
Inventors
- 👤 Henry G Meier
- 👤 George Y Deseve
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 17:49
CPC Classifications
H; H01; H01H; H01H33/00; H01H33/02; H01H33/53; H01H33/56; H01H33/562
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
26 words
The circuit breaker of claim 1 wherein said plurality of heater bands include first, second and third bands directly adjacent said first, second and third conduits.
Claim 2
Dependent Claim
28 words
The circuit breaker of claim 1 which includes a power source for energizing said heater bands and thermostat means connected to said cylinder for controlling said power source.
Claim 3
Dependent Claim
28 words
The circuit breaker of claim 2 which further includes heater blanket means disposed between said first and second heater bands, and between said second and third heater bands.
Claim 4
Dependent Claim
23 words
The circuit breaker of claim 2 which includes first and second band sections for each of said first, second and third bands, respectively.
Claim 5
Dependent Claim
47 words
The circuit breaker of claim 5 which includes first power supply means connected to said first band section of each of said first, second and third bands and second power supply means connected to said second band section of each of said first, second and third bands.
References Cited (Backward Citations)
US2955182A
Cited
US3303310A
Cited
US3118995A
Cited
US3137777A
Cited
US3359390A
Cited
US3358104A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-02-22 | 1974-08-24 | 1975-02-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-22 | 1978-08-24 | 1979-02-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-22 | 1982-08-24 | 1983-02-23 | $7700.00 | Window Closed / Lapsed |