Abstract: A trigger assembly for a power fastener driving tool having a housing, a control valve mounted to the housing and a reciprocating workpiece contacting element associated with the housing, includes a trigger member being pivotally engaged on the housing and having a pair of spaced walls, an actuation lever having a free end and a pivot end pivotally engaged on at least one of the walls, the free end being constructed and arranged for engaging the workpiece contacting element, and a biasing element for biasing the lever and the trigger away from the valve. At least one of the walls are configured for receiving the pivot end and for defining two positions for the lever, a first position which places the free end farther from the workpiece contacting element, and a second position which places the free end closer to the workpiece contacting element, and the lever being selectively positionable in either the first position or the second position and being held in the selected position by the biasing element.

Abstract: A trigger assembly for a power fastener driving tool having a housing, a control valve mounted to the housing and a reciprocating workpiece contacting element associated with the housing, includes a trigger member being pivotally engaged on the housing and having a pair of spaced walls, an actuation lever having a free end and a pivot end pivotally engaged on at least one of the walls, the free end being constructed and arranged for engaging the workpiece contacting element, and a biasing element for biasing the lever and the trigger away from the valve. At least one of the walls are configured for receiving the pivot end and for defining two positions for the lever, a first position which places the free end farther from the workpiece contacting element, and a second position which places the free end closer to the workpiece contacting element, and the lever being selectively positionable in either the first position or the second position and being held in the selected position by the biasing element.

Abstract: Improvements in a fastener-feeding mechanism for a pneumatically powered, combustion-powered, or other rapidly acting, fastener-driving tool comprising a housing structure, a driver, and a magazine, as well as such a mechanism. The housing structure includes a nosepiece defining a drive track. The drive is mounted for repeatable movement along the drive track. The magazine is adapted to store a strip of collated fasteners, e.g., collated nails, such that a leading portion of the strip extends from the magazine. As a component for feeding fasteners individually and sequentially into the drive track from the leading portion of the strip, a pawl has a groove or grooves adapted to receive one such fastener. A fixed structure confines one of two sides of the leading portion of the strip so as to guide such portion. When in an operative position, a hinged structure confines the other side of such portion so as to guide such portion.