Fastener driving tool

Details Fastener driving tool Fastener driving tool

1989-12-08

1991-12-03

Bell, Paul A.

Elongated-member-driving apparatus

With means to move or guide member into driving position

Including supply magazine for constantly urged members

227120, 227 8, B25C 106

Patent

active

050693794

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: 4042036 (1977-08-01), Smith et al.
patent: 4121745 (1978-10-01), Smith et al.
patent: 4129240 (1978-12-01), Geist
patent: 4189080 (1980-02-01), Smith et al.
patent: 4204622 (1980-05-01), Smith et al.
patent: 4298072 (1981-11-01), Baker et al.
patent: 4323127 (1982-04-01), Cunningham

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