Is a
Patent attributes
Patent Jurisdiction
Patent Number
Patent Inventor Names
Takeo Fujiyama0
Date of Patent
September 12, 2006
Patent Application Number
10498873
Date Filed
August 7, 2002
Patent Primary Examiner
Patent abstract
A nose (5) of an air impact driver (1) is mounted with a slidable contact nose (12) and by the contact nose, a contact valve (23) upward therefrom is operated to switch. An AND circuit operated to pilot an air motor controlling pilot valve (39) and a piston controlling pilot valve (41) is constituted by a trigger valve (8) operated by a trigger lever (9) and the contact valve (23). When the contact nose is pressed and the trigger lever is pulled, the air motor controlling pilot valve and the piston controlling pilot valve are switched to starting positions to start the air impact driver.
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