Pneumatic fastener-driving tool and method

Elongated-member-driving apparatus – With interlock means

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Details

294321, 173139, 206347, 227 66, 227 93, 227 95, 227115, 227130, 227136, B25C 104, B25C 700

Patent

active

045666199

ABSTRACT:
A pneumatically operated fastener-driving tool, particularly adapted for nailing drywall to the framing of a building, includes a housing, a reciprocator assembly mounted within the housing, and a piston mechanism mounted within the reciprocating 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: 1378550 (1921-05-01), Miller
patent: 3027560 (1962-04-01), Nelson
patent: 3212632 (1965-10-01), Baum et al.
patent: 3438449 (1969-04-01), Smith
patent: 3438487 (1969-04-01), Galee et al.
patent: 3491932 (1970-01-01), Novak
patent: 3774293 (1973-11-01), Golsch
patent: 3774833 (1973-11-01), Deshich
patent: 3784077 (1974-01-01), Burke, Jr. et al.
patent: 3905535 (1975-09-01), Novak et al.

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