Is a
Patent attributes
Patent Jurisdiction
Patent Number
Patent Inventor Names
Masahito Tanaka0
Yoshinori Shimizu0
Date of Patent
April 5, 2011
0Patent Application Number
120004310
Date Filed
December 12, 2007
0Patent Citations Received
Patent Primary Examiner
Patent 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.
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