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US 5,407,118 AGranted
Forward acting, staple machine with passive release
AssigneeWorkTools, Inc.
InventorJoel S. Marks
Life of this patent
Estimating the term…
Abstract
A manually powered fastening tool which stores and instantly releases the energy of a spring such that it may force a staple or other fastener into an object by an impact blow in which the operating handle is hinged near the end of the tool body opposite the end from which the staples exit. A staple ejecting plunger is unstably linked to spring actuating levers such that with the removal of a light holding force, the plunger and actuating levers are delinked. The tool housing comprises a cantilevered rear profile.
Claims8
A fastening device comprising:
- a housing body to support and guide functional components;
- a fastener guide track attached to said housing near a bottom thereof, to guide fasteners toward a front of said housing;
- a plunger located toward the front of said housing, said plunger oriented to expel objects on said fastener guide track out of said fastening device;
- a spring linked to said plunger, oriented to force said plunger toward the bottom of said housing;
- an actuating means linkable to said plunger such that said plunger may be raised against the bias of said spring through the motion of said actuating means;
- said actuating means to plunger linkage comprising an engagement, said engagement exhibiting a disengagement bias upon said actuating means when said plunger is raised to an uppermost position;
- said engagement held from disengaging said actuating means by an applied force of a further component of said fastening device;
- said applied force greater than said disengagement bias to maintain contact between said engagement and said actuating means;
- and
- said applied force being instantly removed at the uppermost point of said plunger's upward travel.
7 more elements
Dependencies are inferred from the claim text.