Title: Posthole digging apparatus

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.

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Other info:

Inventors: Wisbrock, Kenneth R.

Application Number: 818289
Filing Date: 1977-07-25
Publication_date: 1980-07-15
Assignee:
Primary Class(es): 173/27 173/195
Other Classes:
US Patent Ref:

2732197	Jan, 1956	Cornett	173/22.
2734722	Feb, 1956	Pokorny	173/27.
2852992	Sep, 1958	Simmonds	173/22.
2856158	Oct, 1958	Richardson et al.	173/26.
2940267	Jun, 1960	Shaver	173/27.
3447613	Jun, 1969	Lisenby	173/43.
3452829	Jul, 1969	Smith	173/43.
3507338	Apr, 1970	McWaters et al.	173/43.
3576218	Apr, 1971	Lisenby	173/43.
3731751	May, 1973	Rusco	173/26.

Other Refs:
Primary Examiner: Staab, Lawrence J.
Assistant Examiner:
Attorney: Anderson; James E.