Tool driving or impacting – Drive by means reacting to rotating eccentric mass
Patent
1978-03-07
1980-03-18
Staab, Lawrence J.
Tool driving or impacting
Drive by means reacting to rotating eccentric mass
173 28, 173127, 175 19, 405245, E21C 1102, E21B 1102
Patent
active
041934598
ABSTRACT:
A vehicle-supported post-hole driver comprises a frame adapted to be mounted on the pivot of the vehicle drawbar. It is supported in a fore-and-aft position by a fluid cylinder connected between the frame and the support vehicle, the fluid cylinder providing for fore-and-aft movement of the outboard end of the frame. A second fluid cylinder pivots the frame about the drawbar pivot thereby transversely positioning the outboard end of the frame. The outboard end of the frame supports a pivotally-mounted yoke into which a pivotally-mounted vertical guide bearing is positioned. The combination of the pivoted yoke and the pivoted guide bearing provides a gimbaled arrangement. Slideably positioned in the guide bearing is a vertical shaft to which is attached a drive hammer and post-hole bit assembly. The drive hammer is raised relative to the post-hole bit by means of a fluid cylinder mounted within the bit and connected to the drive hammer. It drops gravitationally and drives the bit into the ground.
REFERENCES:
patent: 2410508 (1946-11-01), Lamme
patent: 3452829 (1969-07-01), Smith
patent: 3548604 (1970-12-01), Campbell
patent: 3700047 (1972-10-01), Gartner
patent: 3838741 (1974-10-01), Pepe
patent: 3961672 (1976-06-01), Welsch et al.
patent: 4002210 (1977-01-01), White
patent: 4050526 (1977-09-01), Deike
patent: 4130168 (1978-12-01), Deike
Farley Eugene D.
Staab Lawrence J.
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