Patent US5103198A successfully refreshed from Google Patents.
US5103198A
Expired / Lapsed
US
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Instantaneous trip device of a circuit breaker
Assignee: GERIN MERLIN 2 CHEMIN DES SOURCES F38240 MEYLAN FRANCE
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Filing: 1991-04-16
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Granted: 1992-04-07
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Expires: 2011-04-16
Abstract
Abstract A limiting circuit breaker with a molded case comprises an overpressure actuator which, when an overpressure occurs in the arc extinguishing chamber due to the action of an arc drawn by the electrodynamic repulsion of the contacts, brings about actuation by a piston, subjected to this overpressure, of the circuit breaker trip bar. The overpressure actuator forms an almost leaktight assembly.
Inventors
- 👤 Robert Morel
- 👤 Marc Rival
- 👤 Hubert Garcia
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 22:38
CPC Classifications
H; H01; H01H; H01H71/00; H01H71/10; H01H71/12; H01H9/00; H01H9/50; H01H71/24; H01H71/2418; H01H2071/2427; H01H77/00; H01H77/02; H01H2077/025; H01H9/30; H01H9/34; H01H9/342
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
125 words
An electrical circuit breaker comprising a molded case, having an arc extinguishing chamber, a pair of contacts housed in said arc extinguishing chamber, elastic means urging the contacts to the closed position, said contacts being capable of separating due to the action of electrodynamic repulsion forces when the current flowing through the contacts exceeds a preset threshold to generate limitation of said current, an opening and closing operating mechanism of said contacts, an overload and/or short-circuit fault trip device which actuates said operating mechanism, and an actuating device formed by a leaktight assembly having a duct communicating with said arc extinguishing chamber and a part reacting to the pressure transmitted by said duct and actuating said operating mechanism when said pressure exceeds a preset threshold.
Claim 2
Dependent Claim
125 words
An electrical circuit breaker comprising a molded case, having an arc extinguishing chamber, a pair of contacts housed in said arc extinguishing chamber, elastic means urging the contacts to the closed position, said contacts being capable of separating due to the action of electrodynamic repulsion forces when the current flowing through the contacts exceeds a preset threshold to generate limitation of said current, an opening and closing operating mechanism of said contacts, an overload and/or short-circuit fault trip device which actuates said operating mechanism, and an actuating device formed by a leaktight assembly having a duct communicating with said arc extinguishing chamber and a part reacting to the pressure transmitted by said duct and actuating said operating mechanism when said pressure exceeds a preset threshold.
Claim 3
Dependent Claim
29 words
The electrical circuit breaker according to claim 1, having deionization plates and wherein said arc extinguishing chamber is partially leaktight and contains said pair of contacts and said plates.
Claim 4
Dependent Claim
69 words
The circuit breaker according to claim 1, wherein said actuator comprises a movable part such as a piston or membrane subjected to said pressure, and a weighted return device acting on said movable part, whose movement causes said circuit breaker opening mechanism to be actuated, said weighted return device being arranged to avoid spurious actuation on a simple overload or when a short-circuit occurs broken by another circuit breaker.
Claim 5
Dependent Claim
37 words
A multipole circuit breaker according to claim 1, wherein each pole cooperates with an actuating device to bring about opening of the multipole circuit breaker when the pressure in any one of said poles exceeds said threshold.
Claim 6
Dependent Claim
44 words
The circuit breaker according to claim 4, wherein the actuating device comprises a movable part subjected to said pressure and common to all the poles and ducts equipped with an anti-return device connecting said movable part to the arc extinguishing chamber of each pole.
Claim 7
Dependent Claim
41 words
The circuit breaker according to claim 5, having a manifold common to all the poles and communicating with the arc extinguishing chamber of each of the poles via ducts equipped with check valves, said movable part being connected to said manifold.
Claim 8
Dependent Claim
63 words
The circuit breaker according to claim 1, wherein said fault trip device comprises a thermal element and/or an electromagnetic element through which the current flows and a trip bar on which said elements and said actuating device act, the action of the fault trip device being time delayed with respect to that of the actuating device so as to provide selectivity of tripping.
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) | 1995-04-07 | 1995-10-07 | 1996-04-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-04-07 | 1999-10-07 | 2000-04-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-04-07 | 2003-10-07 | 2004-04-07 | $7700.00 | Window Closed / Lapsed |