Cutting tooth for a rotating drag bit

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Description

FIG. 1 is a top, front, and right side perspective view of a cutting tooth for a rotating drag bit showing my new design;

FIG. 2 is a left side elevational view;

FIG. 3 is a top plan view;

FIG. 4 is a rear elevational view; and,

FIG. 5 is a bottom plan view thereof.

Referenced Cited
U.S. Patent Documents
3771612 November 1973 Adcock
4181187 January 1, 1980 Lumen
4211508 July 8, 1980 Dill et al.
4452324 June 5, 1984 Jurgens
4471845 September 18, 1984 Juergens
4505342 March 19, 1985 Barr et al.
4545441 October 8, 1985 Williamson
4577706 March 25, 1986 Barr
4705124 November 10, 1987 Abrahamson et al.
4722405 February 2, 1988 Langford
4733734 March 29, 1988 Bardin et al.
Patent History
Patent number: D307279
Type: Grant
Filed: Oct 16, 1986
Date of Patent: Apr 17, 1990
Assignee: Eastman Christensen Company
Inventor: Lloyd Vincent (Salt Lake City, UT)
Primary Examiner: Nelson C. Holtje
Assistant Examiner: Jeffrey Asch
Law Firm: Arnold, White & Durkee
Application Number: 6/919,813