Automatic discharging apparatus for closing spring in air...

Electricity: circuit makers and breakers – Contact moved by sudden release of stored energy

Reexamination Certificate

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Details

C200S050210

Reexamination Certificate

active

07977595

ABSTRACT:
Provided are an air circuit breaker capable of allowing a closing spring to be automatically discharged at a pulled-out position in a pull-out type air circuit breaker and an automatic discharging apparatus for the closing spring in the air circuit breaker, the automatic discharging apparatus for the closing spring comprising a cam shaft rotation preventing unit installed on a cam shaft allowing the closing spring to be charged or discharged and configured to restrict the rotation of the cam shaft by an elastic restoring force of the closing spring, and a unit for releasing the cam shaft rotation preventing unit connected to the cam shaft rotation preventing unit and configured to allow the cam shaft to be rotated by the elastic restoring force of the closing spring according to positions where a main body of the air circuit breaker is pulled out of a cradle.

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patent: 6184483 (2001-02-01), Coudert et al.
patent: 7397008 (2008-07-01), Ahn et al.
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patent: 2006/0131145 (2006-06-01), Suh
patent: 2007/0075047 (2007-04-01), Oh
patent: 2007/0075808 (2007-04-01), Ahn
patent: 2008/0088396 (2008-04-01), Ahn et al.
patent: 0048042 (1982-03-01), None
patent: 1914774 (2008-04-01), None
patent: 61-199406 (1986-09-01), None
patent: 11-329169 (1999-11-01), None
patent: 2000-209719 (2000-07-01), None
patent: 2005-85515 (2005-03-01), None
Japan Office action, mail date is Mar. 15, 2011.

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