Elongated-member-driving apparatus – With means to support member and/or work relative to driver – Bias-type member holder
Patent
1987-08-17
1988-11-08
Bell, Paul A.
Elongated-member-driving apparatus
With means to support member and/or work relative to driver
Bias-type member holder
227110, 227140, B27F 709
Patent
active
047829893
ABSTRACT:
A compensating nail-driving chuck uniformly countersinks nails into boards, despite variations in thickness and hardness of the boards. The nail-driving chuck has a chuck body with jaws at the lower end for holding a nail. A hydraulic cylinder has a drive rod which is connected to a drive pin for driving the nail out through the jaws and into the board. The chuck body is movable with the drive rod until a surface of the board is engaged. At that point, movement of the chuck body stops, and relative movement of the drive rod and drive pin with respect to the chuck body begins. The chuck body limits the stroke of the drive rod, so that the nail is driven a uniform distance into the board once the surface of the board has been engaged.
REFERENCES:
patent: 2530626 (1950-11-01), Paxton
patent: 2679044 (1954-05-01), Bacon et al.
patent: 3743158 (1973-07-01), Cohn et al.
patent: 3945549 (1976-03-01), Colson
patent: 4197886 (1980-04-01), MacDonald
patent: 4444348 (1984-04-01), Campbell, Jr.
Gresham Jack
Wallin Roger N.
Bell Paul A.
Viking Engineering & Development, Inc.
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