Elongated-member-driving apparatus – With interlock means
Patent
1995-12-07
1998-11-03
Smith, Scott A.
Elongated-member-driving apparatus
With interlock means
227130, B25C 104
Patent
active
058296603
ABSTRACT:
A pneumatically operated fastener driving device includes a pilot pressure operated main valve movable from a normally closed position into an opened position allowing a supply of air under pressure to be communicated with a piston chamber to initiate and effect the movement of a piston and fastener driving element through a fastener drive stroke. A first passage structure communicates a pilot pressure chamber and an exhaust port. A secondary valve member is mounted with respect to the first passage structure so as to be movable between an opened position permitting communication between the pilot pressure chamber and the exhaust port and a closed position preventing such communication. A second passage structure communicates the piston chamber with the secondary valve member. An operative cycle is initiated upon exhausting pilot pressure in the pilot pressure chamber causing the main valve to move to its opened position thereby initiating the fastener drive stroke. A build-up of pressure over the drive piston in the piston chamber communicates with the secondary valve member moving it to its closed position thereby preventing communication between the pilot pressure chamber and the exhaust port and causing the main valve to move to its closed position. The secondary valve member is constructed and arranged to move in response to changes in air pressure over the drive piston occurring in the piston chamber to cause the main valve to reciprocate thereby causing the drive piston to move through repeated operating cycles as long as the trigger member is in its operative position.
REFERENCES:
patent: 3353453 (1967-11-01), Ramspeck
patent: 3567098 (1971-03-01), Maynard
patent: 3771710 (1973-11-01), Perkins
patent: 4211352 (1980-07-01), Zilka
patent: 4344555 (1982-08-01), Wolfberg
patent: 4550643 (1985-11-01), Schwartzenberger
patent: 4784308 (1988-11-01), Novak et al.
patent: 4915013 (1990-04-01), Moraht et al.
patent: 5014898 (1991-05-01), Heidrich
patent: 5046653 (1991-09-01), Uno
patent: 5135152 (1992-08-01), Uno et al.
patent: 5485946 (1996-01-01), Jankel
patent: 5522532 (1996-06-01), Chen
patent: 5628444 (1997-05-01), White
Smith Scott A.
Stanley-Bostitch Inc.
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