Fastener driving device with enhanced sequential actuation

Abstract

A fastener driving device including a sequential activating arrangement in which an enabling member has one end pivotally connected to a trigger member, an opposite end operatively associated with an upper end of an upper structure of a work contact assembly and a central portion disposed below a lower end of an actuating member. When the enabling member and trigger member are in the inoperative limiting positions, thereof movement of the upper structure from the inoperative position thereof into the operative position thereof will move the opposite end of said enabling member through a first arcuate path into a first position. When in the first position, the enabling member is moved into a second position in response to the manual movement of the trigger member into the operative limiting position thereof during which the actuating member is moved into the operative position thereof. The enabling member is retained in the second position thereof so long as the trigger member and upper structure are retained in the operative limiting positions thereof. When in the second position, the enabling member is moved through a second arcuate path into a third position in response to the movement of the upper structure into the inoperative position therewith either by virtue of the normal rebound of the device at firing or by a manual movement of the device away from the workpiece.