Hammer-drill chuck with adjustable axial play

Details Hammer-drill chuck with adjustable axial play Hammer-drill chuck with adjustable axial play

1985-02-15

1986-09-02

Weidenfeld, Gil

Chucks or sockets

With fluid-pressure actuator

Socket type

173139, 279 19, 279 194, B23B 3112, B23B 3136

Patent

active

046091998

ABSTRACT:
A hammer-drill chuck has a tubular chuck body centered on an axis and formed with a plurality of guides angularly spaced thereabout, respective jaws displaceable along the guides between inner and outer positions, and an adjustment element displaceable on the body and coupled to the jaws for displacing same between their inner and outer positions. Thus the rear end of a drill bit can be fitted into the passage and gripped between the jaws. A spindle centered on, rotatable about, and reciprocal through a predetermined stroke along the axis projects partially through the chuck body so the rear end of the bit gripped by the jaws can be hammered by a front end of the spindle. At least one coupling element radially but not axially or angularly displaceable in the chuck body engages an axially extending formation on the spindle which is of such an axial length that when the spindle reciprocates axially relative to the chuck body it urges the coupling element radially outward. A spring member urges the coupling element radially inward against the formation.

REFERENCES:
patent: 951013 (1910-03-01), Lane
patent: 3929343 (1975-12-01), Wanner et al.
patent: 4231581 (1980-11-01), Benedict
patent: 4491444 (1985-01-01), Rumpp et al.
patent: 4491445 (1985-01-01), Hunger et al.

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