Hydraulic powered rock drill

Details Hydraulic powered rock drill Hydraulic powered rock drill

1977-02-04

1979-06-05

Staab, Lawrence J.

Tool driving or impacting

Impacting devices

Hammer head moves in arcuate path or rotates

173105, 173134, 173DIG4, 91227, 91303, 91321, B25D 900, F01B 718

Patent

active

041571215

ABSTRACT:
A rock drill having a hydraulic pressure reservoir formed by the drill housing, and an anvil rotation mechanism enclosed in the housing. A piston of substantial length and a mechanical hydro-operated valve means, provide favorable pulse duration and low impact velocity. The piston has only two sliding seal diameters which permits simplified valve and cylinder configuration. The friction surfaces of the fronthead drill assembly are lubricated and cooled by integration with the circulating hydraulic system. A floating seal cartridge between the piston and anvil, tends to rotate the piston with the anvil to minimize rotative scrubbing at impact.

REFERENCES:
patent: 3082741 (1963-03-01), Huffman
patent: 3490549 (1970-01-01), Catterson
patent: 3796271 (1974-03-01), Amtsberg
patent: 3822633 (1974-07-01), Ottestad
patent: 3822752 (1974-07-01), Montabert
patent: 3866690 (1975-02-01), Lance et al.
patent: 3887019 (1975-06-01), Reynolds et al.
patent: 3892279 (1975-07-01), Amtsberg
patent: 3995700 (1976-12-01), Mayer et al.
patent: 4072198 (1978-02-01), Amtsberg

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