Percussion drilling apparatus

Details Percussion drilling apparatus Percussion drilling apparatus

1985-04-05

1986-11-11

Weidenfeld, Gil

Chucks or sockets

With fluid-pressure actuator

Socket type

173 48, 279 193, 279 1K, 279 62, B23B 3108

Patent

active

046218203

ABSTRACT:
A drill chuck assembly for a percussion or hammer drill in which the chuck body is mounted on a rotatable drill spindle and the hammer impact is transmitted by a ram through the spindle to the bit retained in the chuck. A coupling ring surrounding a coaxial portion of the chuck body and the spindle has three angular positions in one of which the chuck body can be withdrawn axially from the spindle and in the second and third of which the body is retained on the spindle. Formations between a shoulder of the spindle and the coupling ring come into play in the second position to permit limited axial displacement of the chuck body on the spindle and are effective in the third position to prevent such axial displacement.

REFERENCES:
patent: 1407589 (1922-02-01), Slater
patent: 3133601 (1964-05-01), Fulop
patent: 3929343 (1975-12-01), Wanner et al.
patent: 4491444 (1985-01-01), Rumpp et al.
patent: 4502824 (1985-03-01), Dohse et al.

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