Rock drilling apparatus

Details Rock drilling apparatus Rock drilling apparatus

1979-03-05

1981-02-17

Feldbaum, Ronald

Tool driving or impacting

Advance causing or controlling means

Driven flexible member causes advance

B23Q 500, E21C 500

Patent

active

042509734

ABSTRACT:
Rock drilling apparatus wherein a motor and chuck assembly is mounted for slidable movement on a mast and elevated and lowered by a pair of endless chains, the endless chains passing through openings in stabilizer units slidably mounted on the mast for vertical movement and which rotatably and slidably brace the drill stem. The chains carry detents which are arranged so that when the endless chains are operated to elevate the motor and chuck, the stabilizers are also elevated in spaced relationship so as to stabilize the drill stem.

REFERENCES:
patent: 1445086 (1923-02-01), Joy
patent: 2781185 (1957-02-01), Robbins
patent: 3402777 (1968-09-01), Watson
patent: 3757858 (1973-09-01), Davis et al.
patent: 3915243 (1975-10-01), Hisey
patent: 3994350 (1976-11-01), Smith
patent: 4137974 (1979-02-01), Decker

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