Mast assembly for percussive and auger drilling

Details Mast assembly for percussive and auger drilling Mast assembly for percussive and auger drilling

1988-05-02

1989-03-07

Yost, Frank T.

Tool driving or impacting

With vehicle support for drive

Drive structure moved to nonuse position for transport

173 42, 173 46, E21C 1102

Patent

active

048097888

ABSTRACT:
A drilling mast assembly (20) mounted on a vehicle (24) for operation in a vertical position and comprising an elongated main mast (44), a secondary mast unit (46) swingably mounted on the main mast (44) for movement from a locked position aligned and contiguous with the main mast (44) to a position swung away from the main mast (44), percussive unit (48) mounted on the secondary mast unit (46) and having a sinker drill (48) movable vertically relative and parallel to the main mast (44) for forming an initial opening in a surface therebelow, and an auger unit (49) having an augar drill (51) mounted on the main mast (44) for vertical movement relative and parallel to the main mast (44) along a longitudinal axis aligned with the longitudinal axis of the percussive sinker drill (48).

REFERENCES:
patent: 2655006 (1953-10-01), Hoen et al.
patent: 3172483 (1965-03-01), Spitzer
patent: 3447613 (1969-06-01), Lisenby
patent: 3548604 (1970-12-01), Campbell
patent: 3576218 (1971-04-01), Lisenby
patent: 3696625 (1972-10-01), Alexander
patent: 3754604 (1973-08-01), Inaba et al.
patent: 3771610 (1973-11-01), Leyrat

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