Patent US4947145A successfully refreshed from Google Patents.
US4947145A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Remote-controlled circuit breaker
Assignee: Mitsubishi Electric Corp
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Filing: 1989-10-03
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Granted: 1990-08-07
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Expires: 2009-10-03
Abstract
Abstract A remote-controlled circuit breaker has an operation mechanism unit, for selecting one of an off state and a remote-controllable state of the circuit breaker, and a movable contact which makes/breaks contact with a fixed contact in connection with a motion of an electromagnetic unit only in the remote-controllable state, in which the electromagnetic unit is automatically disconnected from actuating power when an operation handle is in the OFF position.
Inventors
- 👤 Hirotoshi Ohishi
- 👤 Tatunori Ikeda
- 👤 Manabu Sogabe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 08:46
CPC Classifications
H; H01; H01H; H01H73/00; H01H73/48; H01H89/00; H01H89/06; H01H89/08; H01H71/00; H01H71/10; H01H71/12; H01H71/46; H01H71/66; H01H73/02; H01H73/04; H01H73/045
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
248 words
A remote-controlled circuit breaker comprising; a casing; a fixed contact fixedly mounted to said casing; a movable contact movably mounted to said casing to move in and out of contact with said fixed contact; an electromagnetic unit comprising an electromagnetic coil and a fixed iron core which are fixedly mounted to the casing and a movable iron core movably mounted to the casing to be attracted to the fixed iron core; a control lever which is pivotally mounted to the casing to actuate the movable contact into and out of contact with the fixed contact; operation means, including an operation handle, for releasably holding said control lever, said operation means forming a toggle and holding said control lever in a position for moving said movable contact out of contact with said fixed contact when said operation handle is in a first position and releasing said control lever to allow a predetermined rotation thereof when said operation handle is in a second position; an overcurrent tripping unit for causing said operation means and said control lever to actuate to move said movable contact out of contact with said fixed contact when a current greater than a predetermined value flows through said circuit breaker; and a switch which is connected in series with the electromagnetic coil, and linked to said operation handle in a manner to open when the operation handle is thrown to an OFF position, and to close when the operation handle is thrown to an ON position.
Claim 2
Dependent Claim
248 words
A remote-controlled circuit breaker comprising; a casing; a fixed contact fixedly mounted to said casing; a movable contact movably mounted to said casing to move in and out of contact with said fixed contact; an electromagnetic unit comprising an electromagnetic coil and a fixed iron core which are fixedly mounted to the casing and a movable iron core movably mounted to the casing to be attracted to the fixed iron core; a control lever which is pivotally mounted to the casing to actuate the movable contact into and out of contact with the fixed contact; operation means, including an operation handle, for releasably holding said control lever, said operation means forming a toggle and holding said control lever in a position for moving said movable contact out of contact with said fixed contact when said operation handle is in a first position and releasing said control lever to allow a predetermined rotation thereof when said operation handle is in a second position; an overcurrent tripping unit for causing said operation means and said control lever to actuate to move said movable contact out of contact with said fixed contact when a current greater than a predetermined value flows through said circuit breaker; and a switch which is connected in series with the electromagnetic coil, and linked to said operation handle in a manner to open when the operation handle is thrown to an OFF position, and to close when the operation handle is thrown to an ON position.
Claim 3
Dependent Claim
40 words
A remote-controlled circuit breaker in accordance with claim 1, wherein said switch is linked to said operation handle via a pusher plate which links motion of said operation handle to motion of contact of said switch, and actuates said switch.
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) | 1993-08-06 | 1994-02-05 | 1994-08-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-08-06 | 1998-02-05 | 1998-08-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-08-06 | 2002-02-05 | 2002-08-07 | $7700.00 | Window Closed / Lapsed |