Drill bit finger

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Description

FIG. 1 is a front view in elevation of a drill bit finger showing our new design;

FIG. 2 is a top view thereof in plan;

FIG. 3 is a left side view thereof in elevation;

FIG. 4 is a perspective view thereof from the front;

FIG. 5 is right side view thereof in elevation;

FIG. 6 is a bottom view thereof in plan;

FIG. 7 is a rear view thereof in elevation; and,

FIG. 8 is a perspective view thereof from the rear.

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
Other references
  • PCT/SU89/00123; Feb. 1990; Grigorievich.
Patent History
Patent number: D384962
Type: Grant
Filed: Jun 7, 1995
Date of Patent: Oct 14, 1997
Inventors: Gavin Thomas McLeod (Bullcreek, Western Australia 6154), Matthew Vance Egan (Leeming, Western Australia 6155)
Primary Examiner: Antoine Duval Davis
Application Number: 0/40,008
Classifications
Current U.S. Class: Cutting Tool, E.g., Drill Bit, Etc. (D15/139)
International Classification: 1509;