Extensible beam arrangement

Details Extensible beam arrangement Extensible beam arrangement

1978-12-18

1981-02-17

Foss, J. Franklin

Supports

Machinery support

Movable machine

173 38, 173 43, F16M 1300

Patent

active

042510465

ABSTRACT:
Rock drilling equipment includes a boom carrying an extensible beam arrangement supporting a drilling mast, the extensible beam arrangement comprising a support pivotally mounted on the boom, a first elongated element slidably mounted on the support for movement longitudinally of the first element, a second elongated element slidably mounted on the first element for movement longitudinally of the first element, and drive transmission means sensitive to movement of the first element and adapted to move the second element relative to the support upon sensing relative movement between the support and first element.

REFERENCES:
patent: 3150723 (1964-09-01), Hale
patent: 3162253 (1964-12-01), Curtis
patent: 3212738 (1965-10-01), Curtis et al.
patent: 3356163 (1967-12-01), Rowe et al.
patent: 3993271 (1976-11-01), Kimber
patent: 4022410 (1977-05-01), Einart

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