Quick exhaust remote trigger valve for fastener driving tool

Abstract

A remotely actuated fastener driving tool includes a housing defining a fastener drive track, a fastener driving element carried by the housing for movement within the drive track through successive cycles of operation. A drive piston is operatively connected with the fastener driving element. A pilot pressure operated main valve is movable from a normally closed position into an opened position allowing a supply of air under pressure to be communicated with the drive piston to effect the movement of the drive piston and fastener driving element. A magazine assembly is carried by the housing for receiving a supply of fasteners and feeding successive fasteners into the drive track. Valve structure is provided which includes a valve member carried by the housing and is constructed and arranged to move from a normal, inoperative position into an operative position to initiate the movement of the main valve from its closed position to its opened position. The valve structure is constructed and arranged to be coupled to a remotely located source of air under pressure such that when air pressure is applied to the valve structure, the valve member is biased to the inoperative position thereof in sealing relation with an exhaust path defined by the valve structure, and when the air pressure is relieved from the valve structure, the valve member moves to the operative position thereof thereby opening the exhaust path permitting pilot pressure associated with the main valve to exhaust through the exhaust path initiating the fastener driving stroke.