Posthole digging apparatus

Details Posthole digging apparatus Posthole digging apparatus

1977-07-25

1980-07-15

Staab, Lawrence J.

Tool driving or impacting

With vehicle support for drive

Vehicle motor and drive motor powered by same energy source

173 43, E21C 1102

Patent

active

042123585

ABSTRACT:
A self-propelled posthole digging machine having a vertical drilling assembly mounted on one side thereof by means of an undercarriage frame attachment. This assembly comprises a vertical guide assembly which is movable laterally from the undercarriage and carries an axially movable and rotating auger unit, the vertical guide assembly being pivotally movable relative to a vertical reference to align the auger axis according to the slant of the hole to be drilled.

REFERENCES:
patent: 2732197 (1956-01-01), Cornett
patent: 2734722 (1956-02-01), Pokorny
patent: 2852992 (1958-09-01), Simmonds
patent: 2856158 (1958-10-01), Richardson et al.
patent: 2940267 (1960-06-01), Shaver
patent: 3447613 (1969-06-01), Lisenby
patent: 3452829 (1969-07-01), Smith
patent: 3507338 (1970-04-01), McWaters et al.
patent: 3576218 (1971-04-01), Lisenby
patent: 3731751 (1973-05-01), Rusco

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