US4788392A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tank type gas circuit breaker
Assignee: Hitachi Ltd
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Filing: 1987-12-14
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Granted: 1988-11-29
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Expires: 2007-12-14
Abstract
Abstract A tank type gas circuit breaker for a three-phase alternating current, comprises: three hollow members spaced in parallel with each other; a single stationary side end plate air-tightly fixed to first ends of the three hollow members; a single mechanism side end plate fixed to second ends of the three hollow members; three stationary contacts each supported to the stationary side end plate and extending in the three hollow members; three movable contacts each supported to the mechanism side end plate and extending in the three hollow members; insulated rods extending in the three hollow members while passing through the mechanism side end plate for interrupting contacts between the movable contacts and the stationary contacts; an operational rotary shaft mechanism disposed adjacent to the mechanism side end plate and connected to the insulated rods for driving each of the insulated rods; an actuator for driving the operational rotary shaft mechanism; two bushing porcelain insulators located on a top surface of each of the hollow members; current transformers arranged in lower sides of the bushing porcelain insulators; conductors disposed within the bushing porcelain insulators and connected to the movable and stationary contacts, and arc-extinction gas filled in the hollow members.
Inventors
- 👤 Yoshihito Asai
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 00:41
CPC Classifications
H; H01; H01H; H01H33/00; H01H33/02; H01H33/022; H02; H02B; H02B13/00; H02B13/02; H02B13/035
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
214 words
A tank type gas circuit breaker for a three-phase alternating current, comprising: three hollow members spaced in parallel with each other; a single stationary side end plate air-tightly fixed to first ends of said three hollow members; a single mechanism side end plate fixed to second ends of said three hollow members; three stationary contacts each supported to said stationary side end plate and extending in said three hollow members; three movable contacts each supported to said mechanism side end plate and extending in said three hollow members; insulated rods extending in said three hollow members while passing through said mechanism side end plate for interrupting contacts between said movable contacts and said stationary contacts; an operational rotary shaft mechanism disposed adjacent to said mechanism side end plate and connected to said insulated rods for driving each of said insulated rods; an actuator for driving said operational rotary shaft mechanism; two bushing porcelain insulators provided for each phase, said bushing porcelain insulators being located on a top surface of each of said hollow members; current transformers each arranged in a lower side of each of said bushing porcelain insulators; conductors disposed within said bushing porcelain insulators and connected to said movable contacts and said stationary contacts; and arc-extinction gas filled in said hollow members.
Claim 2
Dependent Claim
214 words
A tank type gas circuit breaker for a three-phase alternating current, comprising: three hollow members spaced in parallel with each other; a single stationary side end plate air-tightly fixed to first ends of said three hollow members; a single mechanism side end plate fixed to second ends of said three hollow members; three stationary contacts each supported to said stationary side end plate and extending in said three hollow members; three movable contacts each supported to said mechanism side end plate and extending in said three hollow members; insulated rods extending in said three hollow members while passing through said mechanism side end plate for interrupting contacts between said movable contacts and said stationary contacts; an operational rotary shaft mechanism disposed adjacent to said mechanism side end plate and connected to said insulated rods for driving each of said insulated rods; an actuator for driving said operational rotary shaft mechanism; two bushing porcelain insulators provided for each phase, said bushing porcelain insulators being located on a top surface of each of said hollow members; current transformers each arranged in a lower side of each of said bushing porcelain insulators; conductors disposed within said bushing porcelain insulators and connected to said movable contacts and said stationary contacts; and arc-extinction gas filled in said hollow members.
Claim 3
Dependent Claim
21 words
The circuit breaker according to claim 1, wherein said circuit breaker is supported at said two end plates to a base.
Claim 4
Dependent Claim
22 words
The circuit breaker according to claim 1, wherein said bushing porcelain insulators are obliquely provided in air-insulating distance relation with each other.
Claim 5
Dependent Claim
50 words
The circuit breaker according to claim 1, wherein said operational rotary shaft mechanism is received in a connecting tank fixed to said mechanism side end plate, and a sealing member is disposed at a portion where a rotary shaft of said operational rotary shaft mechanism passes through said connecting tank.
Claim 6
Dependent Claim
29 words
The circuit breaker according to claim 1, wherein a sealing member is disposed at a portion where each of said insulated rods passes through said mechanism side end plate.
Claim 7
Dependent Claim
206 words
A tank type gas circuit breaker for a three-phase alternating current, comprising: three interrupter tanks spaced in parallel with each other, said three interrupter tanks being defined by three barrel portions, a single stationary side end plate and a single mechanism side end plate; three stationary contacts each supported to said stationary side end plate and extending in said three interrupter tanks; three movable contacts each supported to said mechanism side end plate and extending in said three interrupter tanks; insulated rods extending in said three interrupter tanks while passing through said mechanism side end plate for interrupting contacts between said movable contacts and said stationary contacts; an operational rotary shaft mechanism disposed adjacent to said mechanism side end plate and connected to said insulated rods for driving each of said insulated rods; an actuator for driving said operational rotary shaft mechanism; two bushing porcelain insulators provided for each phase, said bushing porcelain insulators being located on a top surface of each of said interrupter tanks; current transformers each arranged in a lower side of each of said bushing porcelain insulators; conductors disposed within said bushing porcelain insulators and connected to said movable contacts and said stationary contacts; and arc-extinction gas filled in said interrupter tanks.
Claim 8
Dependent Claim
206 words
A tank type gas circuit breaker for a three-phase alternating current, comprising: three interrupter tanks spaced in parallel with each other, said three interrupter tanks being defined by three barrel portions, a single stationary side end plate and a single mechanism side end plate; three stationary contacts each supported to said stationary side end plate and extending in said three interrupter tanks; three movable contacts each supported to said mechanism side end plate and extending in said three interrupter tanks; insulated rods extending in said three interrupter tanks while passing through said mechanism side end plate for interrupting contacts between said movable contacts and said stationary contacts; an operational rotary shaft mechanism disposed adjacent to said mechanism side end plate and connected to said insulated rods for driving each of said insulated rods; an actuator for driving said operational rotary shaft mechanism; two bushing porcelain insulators provided for each phase, said bushing porcelain insulators being located on a top surface of each of said interrupter tanks; current transformers each arranged in a lower side of each of said bushing porcelain insulators; conductors disposed within said bushing porcelain insulators and connected to said movable contacts and said stationary contacts; and arc-extinction gas filled in said interrupter tanks.
Claim 9
Dependent Claim
21 words
The circuit breaker according to claim 6, wherein said circuit breaker is supported at said two end plates to a base.
Claim 10
Dependent Claim
22 words
The circuit breaker according to claim 6, wherein said bushing porcelain insulators are obliquely provided in air-insulating distance relation with each other.
Claim 11
Dependent Claim
50 words
The circuit breaker according to claim 6, wherein said operational rotary shaft mechanism is received in a connecting tank fixed to said mechanism side end plate, and a sealing member is disposed at a portion where a rotary shaft of said operational rotary shaft mechanism passes through said connecting tank.
Claim 12
Dependent Claim
29 words
The circuit breaker according to claim 6, wherein a sealing member is disposed at a portion where each of said insulated rods passes through said mechanism side end plate.
Claim 13
Dependent Claim
208 words
A tank type gas circuit breaker for a three-phase alternating current, comprising: a pair of end plates spaced from each other; three enclosures spaced from each other and disposed in parallel with each other between said pair of end plates; three stationary contacts each supported to one of said pair of end plates and extending in said three enclosures; three movable contacts each supported to the other of said pair of end plates and extending in said three enclosures; insulated rods extending in said three enclosures while passing through said other of said pair of end plates for interrupting contacts between said movable contacts and said stationary contacts; an operational rotary shaft mechanism disposed adjacent to said other of said pair of end plates and connected to said insulated rods for driving each of said insulated rods; an actuator for driving said operational rotary shaft mechanism; two bushing porcelain insulators provided for each phase, said bushing porcelain insulators being located on a top surface of each of said enclosures; current transformers each arranged in a lower side of each of said bushing porcelain insulators; conductors disposed within said bushing porcelain insulators and connected to said movable contacts and said stationary contacts; and arc-extinction gas filled in said enclosures;
Claim 14
Dependent Claim
208 words
A tank type gas circuit breaker for a three-phase alternating current, comprising: a pair of end plates spaced from each other; three enclosures spaced from each other and disposed in parallel with each other between said pair of end plates; three stationary contacts each supported to one of said pair of end plates and extending in said three enclosures; three movable contacts each supported to the other of said pair of end plates and extending in said three enclosures; insulated rods extending in said three enclosures while passing through said other of said pair of end plates for interrupting contacts between said movable contacts and said stationary contacts; an operational rotary shaft mechanism disposed adjacent to said other of said pair of end plates and connected to said insulated rods for driving each of said insulated rods; an actuator for driving said operational rotary shaft mechanism; two bushing porcelain insulators provided for each phase, said bushing porcelain insulators being located on a top surface of each of said enclosures; current transformers each arranged in a lower side of each of said bushing porcelain insulators; conductors disposed within said bushing porcelain insulators and connected to said movable contacts and said stationary contacts; and arc-extinction gas filled in said enclosures;
Claim 15
Dependent Claim
22 words
The circuit breaker according to claim 11, wherein said circuit breaker is supported at said pair of end plates to a base.
Claim 16
Dependent Claim
22 words
The circuit breaker according to claim 11, wherein said bushing porcelain insulators are obliquely provided in air-insulating distance relation with each other.
Claim 17
Dependent Claim
53 words
The circuit breaker according to claim 11, wherein said operational rotary shaft mechanism is received in a connecting tank fixed to said other of said pair of end plates, and a sealing member is disposed at a portion where a rotary shaft of said operational rotary shaft mechanism passes through said connecting tank.
Claim 18
Dependent Claim
32 words
The circuit breaker according to claim 11, wherein a sealing member is disposed at a portion where each of said insulated rods passes through said other of said pair of end plates.
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) | 1991-11-29 | 1992-05-30 | 1992-11-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-11-29 | 1996-05-30 | 1996-11-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-11-29 | 2000-05-30 | 2000-11-29 | $7700.00 | Window Closed / Lapsed |