Rock drilling apparatus

Details Rock drilling apparatus Rock drilling apparatus

1981-03-24

1983-06-14

Purser, Ernest R.

Boring or penetrating the earth

With above-ground means to impact an earth-penetrating means

175320, 173131, 173DIG2, E21B 1700, E21C 306, E21C 708

Patent

active

043877753

ABSTRACT:
Rock drilling apparatus including a pressure fluid driven rock drilling machine (10) and a drill unit (11). The drill unit (11) includes a drill rod (18), a drill bit (16) and a tube (20) surrounding the drill rod (18). The drill rod (18) has a collar (22) in front of a shank (21), the collar (22) maintaining the tube (20) rotatably therebetween and between the drill bit (16). The rock drilling machine (10) includes coupling device (46; 57), a socket means (42) and a rotation chuck (44) for receiving and holding the tube (20) and shank (21) connected to the machine (10), the tube (20) being radially spaced around the drill rod (18) and non-rotatably connected to the socket means (42).

REFERENCES:
patent: 1559709 (1920-09-01), Knapp
patent: 1759573 (1928-02-01), Hansen
patent: 1773366 (1929-06-01), Lear
patent: 2956783 (1960-10-01), Landstedt
patent: 3757891 (1973-09-01), Krieger
patent: 3981368 (1976-09-01), Lundstrom et al.
patent: 4094364 (1978-06-01), Lundstrom et al.
patent: 4108258 (1978-08-01), Ekwall

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