Elongated-member-driving apparatus – With means to shape work or cut product – Deforming means with rectilinear reciprocating motion
Patent
1986-01-23
1989-09-19
Bell, Paul A.
Elongated-member-driving apparatus
With means to shape work or cut product
Deforming means with rectilinear reciprocating motion
173139, 227130, 227156, B25C 104, B25C 118
Patent
active
048673668
ABSTRACT:
A pneumatically operated fastener-driving tool, particularly adapted for nailing drywall to the framing of a building, comprising a housing, a reciprocator assembly mounted within the housing, and a piston mechanism mounted within the reciprocator assembly for axially driving the fastener into the drywall and underlying framing member. Upon actuation of the tool, the piston is pneumatically driven through a fastener-driving stroke and the reciprocator is reactively driven in an opposite direction. The oppositely driven reciprocator assembly absorbs recoil energy during the piston's driving stroke without transmitting an appreciable amount thereof to the housing, thereby substantially precluding housing recoil during driving of the fastener. At the end of the driving stroke, the reciprocator engages and is decelerated by the piston, thereby reducing housing recoil subsequent to the driving of the fastener. At the end of its driving stroke, the piston mechanism recesses the fastener in the drywall and engages a dimpler member to form a shallow recess around the driven fastener.
REFERENCES:
patent: 3027560 (1962-04-01), Nelson
patent: 3040327 (1962-06-01), Michel
patent: 3438449 (1969-04-01), Smith
patent: 3622062 (1971-11-01), Goode, Jr. et al.
patent: 3774293 (1973-11-01), Golsch
Bell Paul A.
Weber Edward R.
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