Chuck for an earth boring machine

Details Chuck for an earth boring machine Chuck for an earth boring machine

1978-01-13

1980-04-08

Culver, Horace M.

Chucks or sockets

With fluid-pressure actuator

Socket type

279121, 173149, 173 43, B23B 3116, B23B 3130

Patent

active

041969146

ABSTRACT:
Rotary and axial forces are transmitted through a chuck to a rotary drill string. The chuck clampingly engages the drill string to transmit rotary and axial forces. A multiplicity of jaw elements in the chuck contact the drill string. The chuck includes a lower jaw retaining means and an upper jaw retaining means. Disengageable means are provided connecting the lower jaw retaining means and the upper jaw retaining means. Jaw actuating means are provided for moving the jaw elements to and from a rod gripping and rod release position.

REFERENCES:
patent: 3212591 (1965-10-01), Tucker
patent: 3301334 (1967-01-01), Odgers et al.
patent: 3451314 (1969-06-01), Smrekar
patent: 3456956 (1969-07-01), Herbkersman
patent: 3533636 (1970-10-01), Firestone et al.
patent: 3692320 (1972-09-01), Lindelof et al.
patent: 3792869 (1974-02-01), Braun
patent: 3992019 (1976-11-01), Crawshay

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