Elongated-member-driving apparatus – With means to move or guide member into driving position – Including supply magazine for constantly urged members
Patent
1983-03-17
1990-05-29
Watts, Douglas D.
Elongated-member-driving apparatus
With means to move or guide member into driving position
Including supply magazine for constantly urged members
173 13, B25L 100
Patent
active
049288687
ABSTRACT:
A fastener driving tool of the type utilizing a motor driven energy storing flywheel and a reciprocating fastener driving ram employs a flywheel having a metal peripheral surface that selectively engages a metal surface of the ram in order to drive the ram into engagement with a fastener to be driven into a workpiece. An elastic cord returns the ram to a retracted position when the ram is disengaged by the flywheel, and a pair of elastic bumpers are employed to limit the travel of the ram in the direction of the retracted position and the direction of the fastener engaging position. The ram, bumpers and cords form a subassembly that permits the ram, cord and bumpers to be removed from the fastener as a unit. The cord is made relatively long to reduce the amount of stretch per unit length applied to the cord thereby to increase the life of the cord. The motor and flywheel may be rotated in opposite directions to reduce precessional forces.
REFERENCES:
patent: 2799336 (1957-07-01), Ruoff
patent: 3465941 (1969-09-01), Fournier
patent: 4042036 (1977-08-01), Smith et al.
patent: 4323127 (1982-04-01), Cunningham
Duo-Fast Corporation
Fridie Jr. Willmon
Watts Douglas D.
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