Three-finned point attack mining bit

- Rogers Tool Works, Inc.
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Description

FIG. 1 is a top view showing my new design for a three-finned point-attack mining bit;

FIG. 2 is a front view of the bit of FIG. 1 showing one fin fully and the other two fins partially. Full views of the other two fins are identical and have been omitted;

FIG. 3 is a back view of the bit of FIG. 1; and,

FIG. 4 is a bottom view of the bit of FIG. 1.

Referenced Cited
U.S. Patent Documents
D347232 May 24, 1994 Massa et al.
4446936 May 8, 1984 Sarin et al.
4527931 July 9, 1985 Sarin
Patent History
Patent number: D387072
Type: Grant
Filed: Jul 25, 1996
Date of Patent: Dec 2, 1997
Assignee: Rogers Tool Works, Inc. (Rogers, AR)
Inventor: Randall W. Ojanen (Bristol, TN)
Primary Examiner: Antoine Duval Davis
Law Firm: Dickstein Shapiro Morin & Oshinsky LLP
Application Number: 0/58,308
Classifications
Current U.S. Class: Cutting Tool, E.g., Drill Bit, Etc. (D15/139)
International Classification: 1509;