Angular adjustment for drill rig mast

Details Angular adjustment for drill rig mast Angular adjustment for drill rig mast

1975-11-13

1977-04-12

Faw, Jr., Price C.

Static structures (e.g., buildings)

Mechanism operated relatively movable shaft assembly

Tilts relative to base

52118, 173 43, E04H 1234

Patent

active

040166872

ABSTRACT:
The mast of a portable earth drilling rig is mounted for pivotal movement between a horizontal transport position and selected drilling positions. A series of radially spaced apart lateral projections on each side of the lower end of the mast are provided with apertures for engaging laterally extending projections disposed on a pair of telescopic braces mounted on the rig frame. The braces may be selectively positioned for automatic engagement with a predetermined pair of projections on the mast whereby the mast, for drilling, may be positioned in the desired angular attitude.

REFERENCES:
patent: 1395895 (1921-11-01), Bellony
patent: 2660268 (1953-11-01), Selberg
patent: 2689549 (1954-09-01), Hayman
patent: 2904310 (1959-09-01), Leonard
patent: 3033527 (1962-05-01), Wilson
patent: 3245180 (1966-04-01), Bules et al.
patent: 3332181 (1967-07-01), Carlson
patent: 3768575 (1973-10-01), Mackinnon et al.
patent: 3783953 (1974-01-01), Kopaska

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