Patrick J Scanlon

US Patent:

54800889, Jan 2, 1996

Filed:

Aug 16, 1994

Appl. No.:

8/291706

Inventors:

Phillip M. Braun - Exeter RI
John J. Harrison - Pawcatuck CT
Arthur E. Perra - Hope Valley RI
Patrick J. Scanlon - East Greenwich RI
David J. Simonelli - Coventry RI

Assignee:

Stanley-Bostitch, Inc. - East Greenwich RI

International Classification:

B25C 104

US Classification:

227130

Abstract:

A fastener driving tool is provided including a portable 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, each of which includes a fastener driving stroke and a return stoke, and a drive piston operatively connected with the fastener driving element for movement therewith. The tool also has a magazine assembly carried by the housing for receiving a supply of fasteners and feeding successive fasteners into the drive track in a position to be driven into a work piece during successive fastener driving strokes of the fastener driving element, an actuating structure carried by the housing and being constructed and arranged to move from a normal, inoperative position into an operative position to initiate the movement of the drive piston and the fastener driving element through a fastener driving stroke, and an overdrive signaling structure carried by the housing. The overdrive signalling structure includes an impulse responsive member constructed an arranged (1) to remain in a first position when the fastener driving tool is being operated at an acceptable power required to drive a fastener into the work piece and (2) to move from the first position thereof to a second position in response to an excessive impulse force resulting from a fastener driving stroke of the tool, thereby signaling the tool operator that the tool is being operated at a power in excess of the power requirements to drive a fastener into the work piece.