Clamping means for a device for driving flexible rod-shaped elem

Details Clamping means for a device for driving flexible rod-shaped elem Clamping means for a device for driving flexible rod-shaped elem

1978-01-04

1980-06-03

Lyddane, William E.

Tool driving or impacting

Hammer or tool shaft reciprocated by gripping means which...

With fixed means cyclically contacted by grip structure

24263CA, E21B 102

Patent

active

042057272

ABSTRACT:
The invention contemplates a clamping means for a device for driving flexible rod-shaped elements in soil, wherein an open-ended tapered inner space of the casing accommodates at least two wedging elements and a spring urging the wedging elements into the engagement with the casing and with a rod being driven. The casing is externally provided with lugs having holes receiving pivots which support rocker arms each having a free end and the other end extending in an aperture of the casing wall and engaging one of the wedging elements.

REFERENCES:
patent: 296804 (1884-04-01), Wells
patent: 370744 (1887-09-01), Mixer
patent: 498313 (1893-05-01), Sime
patent: 1621286 (1927-03-01), Sooy
patent: 2274273 (1942-02-01), Miller

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