Excavating tool

Details Excavating tool Excavating tool

1976-03-29

1977-11-01

Hafer, Robert A.

Tool driving or impacting

Advance causing or controlling means

175170, 61 727, 175 62, B23Q 500

Patent

active

040561518

ABSTRACT:
An excavating tool having an auger head of conventional construction at one end of a horizontal rod with a ratchet drive for rotating said rod at the other end thereof. An outer drive tube covers the intermediate portion of said rod and a thrust washer is secured to said drive rod adjacent the auger head for receiving horizontal thrust from the outer covering drive tube. Perpendicular bars fastened to said covering tube provide engagement means for a drive bar driven into the soil for applying horizontal pressure to the auger head while the auger head is being rotated. This device permits the boring of horizontal holes beneath foundations, sidewalks, etc.

REFERENCES:
patent: 293271 (1884-02-01), Philips et al.
patent: 740521 (1903-10-01), Brown
patent: 826329 (1906-07-01), Grabiel
patent: 1191698 (1916-07-01), Hoover et al.
patent: 1210187 (1916-12-01), Marquiss
patent: 1644426 (1927-10-01), Gentsch
patent: 2320612 (1943-01-01), Kandle
patent: 3896890 (1975-07-01), Gale

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