Crossbar assist mechanism and electrical switching apparatus...

High-voltage switches with arc preventing or extinguishing devic – Arc preventing or extinguishing devices – Operating mechanism structure or arrangement

Reexamination Certificate

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Details

C218S153000

Reexamination Certificate

active

11434006

ABSTRACT:
A crossbar assist mechanism is for a circuit breaker including a housing, a movable contact, a stationary contact, and an operating mechanism. The operating mechanism includes a crossbar, a carrier coupled to the crossbar, and a movable contact arm which is pivotably cooperable with the carrier. The movable contact is disposed on the movable contact arm. The crossbar moves the carrier and the movable contact arm, thereby moving the movable contact into and out of electrical contact with the stationary contact. The crossbar assist mechanism includes an electrically conductive member electrically interconnecting the carrier and the movable contact arm to a load terminal. A spring disposed between the crossbar and the electrically conductive member biases the crossbar from a first position corresponding to the movable contact and the stationary contact being separated, toward a second position corresponding to the movable contact being in electrical contact with the stationary contact.

REFERENCES:
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patent: 5910760 (1999-06-01), Malingowski et al.
patent: 5927484 (1999-07-01), Malingowski et al.
patent: 6204465 (2001-03-01), Gula et al.
patent: 6236294 (2001-05-01), Zindler et al.
patent: 6262645 (2001-07-01), McNeil et al.
patent: 6281459 (2001-08-01), Munsch et al.
patent: 6373016 (2002-04-01), Brouillat et al.

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