Torquer/thruster for flexible roofdrill

Details Torquer/thruster for flexible roofdrill Torquer/thruster for flexible roofdrill

1976-05-07

1978-12-05

Hafer, Robert A.

Tool driving or impacting

Advance causing or controlling means

Tool advances relative to drive

173152, 226162, 226124, 74 88, B23Q 5033

Patent

active

041281330

ABSTRACT:
A torquer/thruster with a hydrostatically actuated chuck assembly configured to drivingly engage a flexible roofdrill for applying rotational torque and longitudinal thrust to the roofdrill shaft. The chuck assembly is mounted within a rotatable and longitudinally movable piston assembly, the chuck and piston assemblies fixed against relative movement with respect to one another. The piston assembly is mounted within a rotating barrel assembly, the piston and barrel assemblies being fixed against relative rotational movement and being constrained for limited longitudinal movement with respect to one another.

REFERENCES:
patent: 2638324 (1953-05-01), Ball et al.
patent: 2730331 (1956-01-01), Harinck
patent: 3133469 (1964-05-01), Wungberg
patent: 3246706 (1966-04-01), Feucht et al.
patent: 3690687 (1972-09-01), Moe
patent: 3819073 (1974-06-01), Asselborn et al.
patent: 3854645 (1974-12-01), Knights

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