Patent USRE33400E successfully refreshed from Google Patents.
USRE33400E
Expired / Lapsed
US
⏱️ 0.0 years remaining
Circuit breaker
Assignee: Mitsubishi Electric Corp
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Filing: 1988-06-14
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Granted: 1990-10-23
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Expires: 2008-06-14
Abstract
Abstract A circuit breaker characterized by a roller guide member, 1a, provided on the inside wall of an upper part of the case 1. The roller quite member, 1a, has a curved shape designed to form or smooth curved path, 100, in cooperation with the roller receiving indents 5a and 56, so that the roller can be reliably reset in the roller-receiving indents 5a and 5b.
Inventors
- 👤 Hiroshi Fujii
- 👤 Hiroaki Fujihisa
- 👤 Hirotoshi Ohishi
- 👤 Yoshiaki Kobayashi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 08:55
CPC Classifications
H; H01; H01H; H01H71/00; H01H71/10; H01H71/50; H01H71/52; H01H71/526; H01H71/02; H01H2071/0292
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
246 words
A circuit breaker comprising: a handle for connection and disconnection of contacts by outside controlling thereof and energized by a spring toward its position of disconnection, a link member which is linked by its one end to a driving part of said handle, thereby to form a toggle link system together with said handle, a roller rotatably held on the other end of said link member, a fixed contact fixed on a part of a case, a moving contact arm which has a roller receiving indent on one end part and a moving contact on the other end part, is cradlably fulcrumed on the case and is energized in a direction to make said moving contact .[.touch.]. .Iadd.detach from .Iaddend.said fixed contact to make said .[.connection.]. .Iadd.disconnection.Iaddend., an engaging lever which has an engaging part disposed to face said roller receiving indent to hold said roller and its cradlably fulcrumed on the case, an overcurrent trip device which is for releasing said engaging of said roller by said engaging part when an overcurrent above a predetermined value arises, thereby making said moving contact detach from said fixed contact to make said disconnection, and a roller guide member which is provided in said case to form a roller guiding path together with said roller-receiving-indent for smooth guiding of said roller during its motion from a tripped position where said roller is apart from said roller-receiving-indent to a reset position where said roller is resting on said roller-receiving-indent.
Claim 2
Dependent Claim
246 words
A circuit breaker comprising: a handle for connection and disconnection of contacts by outside controlling thereof and energized by a spring toward its position of disconnection, a link member which is linked by its one end to a driving part of said handle, thereby to form a toggle link system together with said handle, a roller rotatably held on the other end of said link member, a fixed contact fixed on a part of a case, a moving contact arm which has a roller receiving indent on one end part and a moving contact on the other end part, is cradlably fulcrumed on the case and is energized in a direction to make said moving contact .[.touch.]. .Iadd.detach from .Iaddend.said fixed contact to make said .[.connection.]. .Iadd.disconnection.Iaddend., an engaging lever which has an engaging part disposed to face said roller receiving indent to hold said roller and its cradlably fulcrumed on the case, an overcurrent trip device which is for releasing said engaging of said roller by said engaging part when an overcurrent above a predetermined value arises, thereby making said moving contact detach from said fixed contact to make said disconnection, and a roller guide member which is provided in said case to form a roller guiding path together with said roller-receiving-indent for smooth guiding of said roller during its motion from a tripped position where said roller is apart from said roller-receiving-indent to a reset position where said roller is resting on said roller-receiving-indent.
Claim 3
Dependent Claim
31 words
A circuit breaker in accordance with claim 1, wherein said roller guide member is formed in an integral mold configuration to an inside wall of an upper part of said case.
Claim 4
Dependent Claim
41 words
A circuit breaker in accordance with claim 2, wherein said roller guiding member has a tapered convex curve part at an entrance part of said roller guiding path and a concave downward curve part connected to the tapered convex curve part.
References Cited (Backward Citations)
DE1904731A1
Cited
US3970976A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-10-22 | 1994-04-23 | 1994-10-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-10-22 | 1998-04-23 | 1998-10-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-10-22 | 2002-04-23 | 2002-10-23 | $7700.00 | Window Closed / Lapsed |