Electric fastener driving tool

A pusher assembly for use to advance headed fasteners in a magazine assembly including a bottom end of the type used in fastener driving tools comprising:

• a first guide member defined by a predetermined portion of an elongated tube,
• a second guide member defined by a second predetermined portion of the elongated tube,
• first means for securing said first and second guide means to said magazine assembly and for joining said first and second portions in spaced relationship to define a gap therebetween,
• a pusher,
• second means for slideably mounting said pusher on said first and second guide members and in said gap and for joining said first and second guide members in spaced relationship, said pusher including support portions, said second means mounting said pusher in a predetermined position wherein said support portions engage said bottom of said magazine assembly thereby supporting said first and second guide members, and
• means for biasing said pusher and said second means from one end of said first and second guide members to another end of said first and second guide members.

In a fastener driving tool of the type including a housing defining a handle and nose portions, a drive track defined in said housing, a driver blade reciprocally mounted in said drive track and a magazine assembly mounted on said housing for feeding fasteners to said drive track, said magazine assembly including a frame, the improvement comprising

• a workpiece engagement member removably attached to said frame, said engagement member including an inner periphery of a configuration complementary to the configuration of the outer periphery of said frame to allow securement of said engagement member to said frame in reversible positions to align first and second ends of said engagement member adjacent said drive track, said engagement member including an outer peripheral workpiece engaging surface of a configuration complementary to the surface of a selected workpiece, said engagement member further including a raised portion on said outer peripheral workpiece engaging surface in the vicinity of one of said first or second ends of said engagement member for elevating said nose portion above said workpiece when said first or second end with said raised portion is positioned adjacent said drive track to prevent damage to said workpiece by said blade, said raised portion being of a size and configuration to allow placement of said nose portion on said workpiece when said work engagement member is in the reverse position with said raised portion distant from said drive track.