Feed beam

Details Feed beam Feed beam

1978-05-09

1980-06-17

Cohen, Irwin C.

Motors: expansible chamber type

Plural relatively movable or rigidly interconnected working...

91533, 92137, 92151, 173 31, 173147, B23Q 5033, E21C 506, F15B 1116, F15B 1306

Patent

active

042078059

ABSTRACT:
A feed beam for a rock drill comprises a box girder (13), a saddle (10) slidable along the box girder, and two power units (20,20a) inserted into the ends of the box girder.
Each power unit comprises a pair of fixed pulleys (22,24) located outside the end of the box girder, an hydraulic jack (26) carrying a pair of movable pulleys (28,30) within the box girder, and a cable coupled between the power unit and the saddle and passing over the four pulleys.

REFERENCES:
patent: 404472 (1889-06-01), Dunn
patent: 1272459 (1918-07-01), Kitts, Jr.
patent: 2029223 (1936-01-01), Curtis
patent: 2130982 (1938-09-01), Gartin
patent: 2960208 (1960-11-01), Sibley et al.
patent: 3131603 (1964-05-01), Hadekel
patent: 3212738 (1965-10-01), Curtis et al.
patent: 3535985 (1970-10-01), Attebo
patent: 3744575 (1973-07-01), Strommes
patent: 3990583 (1976-11-01), Nishida et al.

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