Blasthole drill with improved automatic breakout wrench

Details Blasthole drill with improved automatic breakout wrench Blasthole drill with improved automatic breakout wrench

1995-04-14

1997-08-05

Tsay, Frank

Boring or penetrating the earth

With magazine for successively moving unconnected, oriented...

175 85, 175162, 173164, 81 5733, E21B 300, E21B 1900, B25B 1350

Patent

active

056532970

ABSTRACT:
An automatic breakout wrench with: the clamping jaw located on the inside of the pipe so that the clamping grip is not reduced by the force of the breakout cylinder; the orientation of the breakout cylinder resulting in the breakout cylinder creating a moment that forces the wrench toward the pipe rather than away from the pipe; pivotal movement of the wrench member guided by three pins; the wrench member pivoting twenty-four degrees; the clamping jaw pivotally mounted on one of the pins guiding movement of the wrench member; and shims secured in a manner so as to be easily inserted and removed.

REFERENCES:
patent: 3680412 (1972-08-01), Mayer et al.
patent: 3832918 (1974-09-01), Lang et al.
patent: 3915243 (1975-10-01), Hisey et al.
patent: 3920087 (1975-11-01), Hisey et al.
patent: 4128135 (1978-12-01), Mitchart et al.
patent: 4194419 (1980-03-01), Mitchhart et al.
patent: 4194579 (1980-03-01), Bailey et al.
patent: 5105687 (1992-04-01), Paech
patent: 5172613 (1992-12-01), Wesch, Jr.
3 sheets of Gardner-Denver Co. Drawing. No. 301174 dated Jan. 25, 1982.
Driltech Inc. Parts Manual (Model C90K-D) S/N 731,882; dated Oct. 4, 1993; p. 12-4 (1 of 4 and 2 of 4).
3 sheets of Harnischfeger Drawing No. 100J6640; dated Aug. 24, 1992.

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