Roof bolt injection mast

Details Roof bolt injection mast Roof bolt injection mast

1975-05-27

1977-02-01

Custer, Jr., Granville Y.

Elongated-member-driving apparatus

With means to move or guide member into driving position

Including supply magazine for constantly urged members

227130, B25C 510

Patent

active

040058115

ABSTRACT:
This invention relates to a roof bolt injection mast comprising an elongate member having a length slightly less than the height from the floor to the roof of a tunnel or gallery in which the mast is to be operated, the elongate member being provided with a passage which extends therethrough from one end to the other and a port extending through the sidewall thereof to communicate with the said passage, a portion of the passage extending from the lower end of the member to the point of communication with the port being enlarged whereby a fluid introduced through said port will provide the means whereby a first piston disposed in the enlarged portion of the passage is operable to lock the mast between the floor and the ceiling while a second piston disposed in the main passage provides the means whereby a roof bolt disposed therein will be injected into the roof under the influence of the fluid introduced through the port.

REFERENCES:
patent: 3082898 (1963-03-01), Bosch
patent: 3254522 (1966-06-01), Elliott et al.
patent: 3601303 (1971-08-01), Leach
patent: 3819101 (1974-06-01), Elders et al.
patent: 3847321 (1974-11-01), Charlez
patent: 3863825 (1975-02-01), Elders et al.

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