Earthing switch

Details Earthing switch Earthing switch

2011-04-05

2011-04-05

Luebke, Renee (Department: 2833)

High-voltage switches with arc preventing or extinguishing devic

Arc preventing or extinguishing devices

Air-current blowout

C218S057000, C218S055000

Reexamination Certificate

active

07919720

ABSTRACT:
In an earthing switch a release mechanism releases pressure stored in a puffer type arc cancelling chamber by releasing the chamber at a predetermined area toward a stationary contact unit during a full stroke extent of a movable contact unit so that the puffering operation can be deterred from execution.

REFERENCES:
patent: 4562319 (1985-12-01), Badon et al.
patent: 4864286 (1989-09-01), Ohshita et al.
patent: 5902979 (1999-05-01), Kim
patent: 5977502 (1999-11-01), Mizoguchi et al.
patent: 1131679 (1982-09-01), None
patent: 2198549 (1998-08-01), None
patent: 5-114337 (1993-05-01), None
Office Action issued in the corresponding Canadian Patent Application No. 2,625,108 dated May 4, 2010.

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