Opening device for an extension rod drilling equipment

Details Opening device for an extension rod drilling equipment Opening device for an extension rod drilling equipment

1986-09-26

1988-01-05

Schmidt, Frederick R.

Tools

Wrench, screwdriver, or driver therefor

Machine

279 71, B25B 1700

Patent

active

047167947

ABSTRACT:
An opening device for an extension rod drilling equipment, comprising a supporting sleeve (3) rotatably mounted in a frame (1), and gripping jaws (6) displaceably mounted in the sleeve for gripping a drill rod. In order to allow the device to both grip the drill rod and rotate it, the supporting sleeve is connected to a rotating mechanism (14) and provided with cylindrical guideways (4, 5) positioned eccentrically with respect to the axis (A) of the sleeve in such a manner that a rotating movement of the sleeve with respect to the gripping jaws causes a displacement of the gripping jaws towards an aligned rod releasing position and away from the aligned position respectively, depending on the direction of rotation of the supporting sleeve.

REFERENCES:
patent: 420016 (1890-01-01), McCool
patent: 1180667 (1916-04-01), Martin
patent: 3371562 (1968-03-01), Kelley

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