Billy M. Stewart - Spokane WA, US Dean F. Eisenbacher - Salem OR, US Matthew L. Kopp - Spokane WA, US Thomas J. Zysk - Spokane WA, US Catherine H. Sander - Spokane WA, US
Assignee:
The United States of America as represented by the Department of Health and Human Services - Washington DC
International Classification:
E21B 31/18 E21B 41/00
US Classification:
173 25, 173 90, 173185
Abstract:
A gripping assembly mounted on an impact hammer having a longitudinally extending impact axis, the gripping assembly including a pair of opposed elongate gripping arms, having gripping end portions which may be extended and swung toward each other to grip material in the region of the working end of the impact hammer. When retracted, the gripping arms rest to opposite sides of the impact hammer to permit free operation of the impact hammer.