Rock drill feed mechanism

Details Rock drill feed mechanism Rock drill feed mechanism

1975-08-08

1976-09-14

Purser, Ernest R.

Tool driving or impacting

Advance causing or controlling means

Motor causes or controls advance

173 43, E21C 502

Patent

active

039801446

ABSTRACT:
A rock drill feed shell is slidably mounted on a support bracket and is connected to a feed screw which is threaded through a feed nut mounted on an elongated supporting tube disposed telescopically within the feed shell. The supporting tube is displaceable with respect to the support bracket by a feed extension cylinder mounted on the support bracket. A rock drill is slidably mounted on the feed shell and engages a second feed screw supported by the feed shell. A feed motor is drivably connected to both screws.

REFERENCES:
patent: 478266 (1892-07-01), Synon
patent: 3247913 (1966-04-01), Hallberg et al.
patent: 3256943 (1966-06-01), Lindgren
patent: 3692124 (1972-09-01), Kimber
patent: 3744575 (1973-07-01), Strommes
patent: 3807510 (1974-04-01), Boom et al.
patent: 3896887 (1975-07-01), Council

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