Safety apparatus of air impact driver

Details Safety apparatus of air impact driver Safety apparatus of air impact driver

2006-09-12

2006-09-12

Smith, Scott A. (Department: 3721)

Metal fusion bonding

With control means responsive to sensed condition

C227S130000, C081S434000, C081S057440, C173S011000, C173S093500

Reexamination Certificate

active

07104433

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.

REFERENCES:
patent: 3895562 (1975-07-01), El Guindy
patent: 5862724 (1999-01-01), Arata et al.
patent: 5921156 (1999-07-01), Takezaki et al.
patent: 6205894 (2001-03-01), Tanaka
patent: 6247387 (2001-06-01), Ketteringham
patent: 6672404 (2004-01-01), Kamo et al.
patent: 6843400 (2005-01-01), Lee
patent: 774325 (1997-05-01), None
patent: 42-1157 (1967-01-01), None
patent: 53-33478 (1978-03-01), None

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