Shutter locking system for draw-out circuit breakers and...

Details Shutter locking system for draw-out circuit breakers and... Shutter locking system for draw-out circuit breakers and...

2005-12-21

2008-03-25

Luebke, Renee (Department: 2833)

Electricity: circuit makers and breakers

Interlocking

Drawout-type switchgear

C439S436000

Reexamination Certificate

active

07348505

ABSTRACT:
A cassette for a draw-out circuit breaker apparatus is disclosed. The cassette comprises a base having a front edge and a back edge, the back edge defining a back plane, a set of shutters disposed at the back plane and configured to open and close, and a set of shutter locks extending from the front edge to the back edge and in operable communication with the set of shutters. The shutter locks are biased toward a first position. In response to the shutter locks being driven toward a second position, the shutters are restrained from opening. The shutter locks are configured to be restrained in the second position.

REFERENCES:
patent: 4773870 (1988-09-01), Sinnig
patent: 5097382 (1992-03-01), Leach
patent: 5113043 (1992-05-01), Morris
patent: 5196658 (1993-03-01), Gula
patent: 5200585 (1993-04-01), Davies
patent: 5343355 (1994-08-01), Ishikawa
patent: 5581133 (1996-12-01), Smith
patent: 5757260 (1998-05-01), Smith
patent: 6028272 (2000-02-01), Akers

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