Low-voltage circuit breaker

Details Low-voltage circuit breaker Low-voltage circuit breaker

2005-08-02

2005-08-02

Lee, Richard K. (Department: 2832)

Electricity: circuit makers and breakers

Electric switch details

Contact

C200S400000, C335S016000

Reexamination Certificate

active

06924445

ABSTRACT:
A low-voltage circuit breaker, comprising:at least one first fixed contact, which is electrically connected to a terminal for connection to an electric circuit;a rotating moving contact, which comprises a central body from which at least one first arm protrudes, an active surface being provided at the end of the first arm, the active surface being associable/separable with respect to the fixed contact by means of a rotation of the moving contact;a rotating contact supporting shaft, which is functionally connected to an actuation mechanism of the circuit breaker and is provided with a seat that accommodates the central body of the moving contact so that the first arm protrudes externally from the seat, at least one first spring being furthermore arranged in the contact supporting shaft and being functionally coupled to the moving contact and suitable to ensure, when the circuit breaker is closed, an adequate contact pressure between the active surface and the first fixed contact; its particularity consists of the fact that at least one first abutment surface is provided on the central body of the moving contact and is suitable to act, during a rotation of the moving contact caused by a short-circuit, against a complementarily shaped surface formed in the seat of the shaft, so that at least part of the energy accumulated by the rotating moving contact during its rotation is transmitted directly to the shaft.

REFERENCES:
patent: 4910485 (1990-03-01), Bolongeat-Mobleu et al.
patent: 5534835 (1996-07-01), McColloch et al.
patent: 5539167 (1996-07-01), Hood et al.
patent: 6262642 (2001-07-01), Bauer
patent: 6403901 (2002-06-01), Boeder et al.
patent: 1137038 (2001-09-01), None
patent: 0 903 763 (1999-03-01), None
patent: 0 903 763 (1999-06-01), None
patent: 1 137 038 (2001-09-01), None

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