US3839613A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Puffer type circuit breaker
Assignee: Hitachi Ltd
•
Filing: 1973-06-01
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Granted: 1974-10-01
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Expires: 1993-06-01
Abstract
Abstract A puffer type circuit breaker comprises a contactor device including at least one set of a fixed contactor and a hollow movable contactor provided in a pressure container in which an arc-extinguishing gas of unitary pressure is filed, the contactors being separable relatively from each other, a puffer device for compressing the arc-extinguishing gas in conjunction with a breaking operation, an insulating nozzle formed with an orifice portion surrounding the outer diameter portions of the fixed contactor for driving the arc-extinguishing gas compressed to a high pressure by the puffer device at an arc produced between the contactors, and valve mechanisms provided on the side of the fixed contact and on the side of the movable contactor, respectively, the mechanisms blocking the arc-extinguishing gas until the movable contactor is separated a predetermined distance away from the fixed contactor and thereafter being substantially simultaneously opened. This allows the arc-extinguishing gas to be compressed at pressure permitting the breaking operation and to be blown against the arc in a state where the contactors are separated by a distance permitting the breaking operation with the result of the breaking of a large current.
Inventors
- 👤 T Tsubaki
- 👤 M Sato
- 👤 S Nakano
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 09:03
CPC Classifications
H; H01; H01H; H01H33/00; H01H33/70; H01H33/88; H01H33/90; H01H33/91
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
143 words
A puffer type circuit breaker comprising a contactor device including at least one set of a fixed contactor and a hollow movable contactor in a pressure container in which an arcextinguishing gas of unitary pressure is filled, said contactors being separable relatively from each other, a puffer device for compressing said arc-extinguishing gas in conjunction with a breaking operation, an insulating nozzle formed with an orifice portion surrounding the outer diameter portion of said fixed contactor for driving the arc-extinguishing gas compressed to a high pressure by said puffer device at an arc produced between said contactors, and valve mechanisms provided on the side of said fixed contactor and on the side of said movable contactor, respectively, said mechanisms blocking said arc-extinguishing gas until said movable contactor is separated a predetermined distance away from said fixed contactor and thereafter being substantially simultaneously opened.
Claim 2
Dependent Claim
143 words
A puffer type circuit breaker comprising a contactor device including at least one set of a fixed contactor and a hollow movable contactor in a pressure container in which an arcextinguishing gas of unitary pressure is filled, said contactors being separable relatively from each other, a puffer device for compressing said arc-extinguishing gas in conjunction with a breaking operation, an insulating nozzle formed with an orifice portion surrounding the outer diameter portion of said fixed contactor for driving the arc-extinguishing gas compressed to a high pressure by said puffer device at an arc produced between said contactors, and valve mechanisms provided on the side of said fixed contactor and on the side of said movable contactor, respectively, said mechanisms blocking said arc-extinguishing gas until said movable contactor is separated a predetermined distance away from said fixed contactor and thereafter being substantially simultaneously opened.
Claim 3
Dependent Claim
39 words
A puffer type circuit breaker according to claim 1, wherein said valve mechanisms provided on the side of said fixed contactor and on the side of said movable contactor are adapted to open in response to an operational stroke.
Claim 4
Dependent Claim
80 words
A puffer type circuit breaker according to claim 1, wherein said valve mechanism provided on the side of said movable contactor comprises a hole provided at the side wall of a cylindrical operational member having a hollow portion and coupled to a hollow portion of said movable contactor, and a valve member for blocking said hole at the beginning of the breaking operation and for releasing the blocking of said hole after said operational member is moved a predetermined distance.
Claim 5
Dependent Claim
37 words
A puffer type circuit breaker according to claim 3, wherein said valve member comprises a support member for supporting a fixed portion of said puffer device, said support member having a hollow portion surrounding said operational member.
Claim 6
Dependent Claim
40 words
A puffer type circuit breaker according to claim 1, wherein said valve mechanism provided on the side of said fixed contactor is defined by the orifice portion of said insulating nozzle and said fixed contactor inserted into said orifice portion.
Claim 7
Dependent Claim
83 words
A puffer type circuit breaker according to claim 1, wherein said fixed contactor is formed hollow and said valve mechanism provided on the side of said fixed contactor is defined by a hole provided at the side wall of said fixed contactor and a portion extending through the orifice portion of said insulating nozzle, said extending portion blocking said hole at the beginning of the breaking operation and releasing the blocking of said hole after said insulating nozzle is moved a predetermined distance.
Claim 8
Dependent Claim
76 words
A puffer type circuit breaker according to claim 1, wherein the inner surface of said insulating nozzle on the side of said movable contactor and in the proximity of said orifice portion is formed substantially perpendicular to a first direction along which said fixed contactor and movable contactor are oppositely disposed so that said arc-extinguishing gas may be blown from a second direction perpendicular to said first direction to a space in which the arc develops.
Claim 9
Dependent Claim
74 words
A puffer type circuit breaker according to claim 1, wherein said fixed contactor comprises a main fixed contactor disposed outside of said insulating nozzle and a fixed arc contactor defining said valve mechanism upon insertion thereof into the orifice portion of said insulating nozzle and wherein said movable contactor comprises a main movable contactor seperably contacting with said main fixed contactor and a hollow movable arc contactor seperably contacting with said fixed arc contactor.
Claim 10
Dependent Claim
31 words
A puffer type circuit breaker according to claim 8, wherein said main movable contactor is formed on the outer circumferencial surface of an insulating nozzle support for fixing said insulating nozzle.
Claim 11
Dependent Claim
72 words
A puffer type circuit breaker according to claim 8, wherein said movable arc contactor is disposed in the proximity of the upper surface of said puffer device and the inner circumferential surface of said insulating nozzle on the side of said movable arc contactor is disposed in the upper surface on the side of said movable arc contactor with a gap provided therebetween for the flow of the high pressure arc-extinguishing gas.
Claim 12
Dependent Claim
48 words
A puffer type circuit breaker according to claim 8, wherein said fixed arc contactor is adapted to be inserted to the hollow portion of said hollow movable arc contactor and said fixed arc contactor is provided with means for applying a pressure contact to said movable arc contactor.
References Cited (Backward Citations)
US2781435A
Cited
US3527912A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-09-30 | 1978-04-01 | 1978-10-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-30 | 1982-04-01 | 1982-10-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-30 | 1986-04-01 | 1986-10-01 | $7700.00 | Window Closed / Lapsed |