Drill bit finger

Description

FIG. 1 is a right side view in elevation of a drill bit finger (without cutting head attached) showing our new design;

FIG. 2 is a rear view thereof in elevation (without cutting head attached);

FIG. 3 is a perspective view thereof from the rear (without cutting head attached);

FIG. 4 is a front view thereof in elevation (without cutting head attached);

FIG. 5 is a left side view thereof in elevation (without cutting head attached);

FIG. 6 is a bottom view thereof in plan (without cutting head attached);

FIG. 7 is a perspective view thereof from the front (without cutting head attached);

FIG. 8 is a front view in elevation of the drill bit finger (with cutting head attached) showing our new design;

FIG. 9 is a left side view thereof (with cutting head attached);

FIG. 10 is a perspective view thereof from the front (with cutting head attached);

FIG. 11 is a top view thereof in plan (with cutting head attached);

FIG. 12 is a top view thereof in plan (with cutting head attached);

FIG. 13 is a right side view thereof in elevation (with cutting head attached);

FIG. 14 is a rear view thereof in elevation (with cutting head attached); and,

FIG. 15 is a perspective view thereof from the rear (with cutting head attached).

Referenced Cited
U.S. Patent Documents
D220920 June 1971 Cochran
2068704 January 1937 Powell
2345699 April 1944 Camp
2358466 September 1944 Miller
2640546 June 1953 Baker
2842343 July 1958 Church et al.
3437159 April 1969 Link et al.
3603411 September 1971 Link
3603413 September 1971 Grill et al.
3692126 September 1972 Rushing et al.
3955633 May 11, 1976 Bowles
4281722 August 4, 1981 Tucker et al.
4497382 February 5, 1985 Nenkov
4770253 September 13, 1988 Hallissy et al.
4828023 May 9, 1989 Leggett
Foreign Patent Documents
788637 January 1958 GBX
2181764 April 1987 GBX
PCT/SU89/00123 February 1990 WOX
Patent History
Patent number: D377029
Type: Grant
Filed: Jun 7, 1995
Date of Patent: Dec 31, 1996
Inventors: Gavin T. McLeod (Bullcreek, Western Australia 6154), Matthew V. Egan (Leeming, Western Australia 6155)
Primary Examiner: Antoine Duval Davis
Application Number: 0/40,007
Classifications