Heavy duty roof drill bit

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Description

FIG. 1 is a side elevational view of a heavy duty roof drill bit embodying the invention, the opposite side being a mirror image;

FIG. 2 is a top plan view of the heavy duty roof drill bit of FIG. 1;

FIG. 3 is a bottom view thereof;

FIG. 4 is another side elevational view of the roof drill bit, as rotated 90° from the FIG. 1, and the opposite side being a mirror image; and

FIG. 5 is a perspective view of the roof drill bit.

Claims

The ornamental design for a heavy duty roof drill bit, as shown and described.

Referenced Cited
U.S. Patent Documents
3163246 December 1964 Vagins et al.
5180022 January 19, 1993 Brady
D340248 October 12, 1993 Brady
D351174 October 4, 1994 Brady
5429199 July 4, 1995 Sheirer et al.
6044920 April 4, 2000 Massa et al.
D424579 May 9, 2000 Brady
D430578 September 5, 2000 Brady
D514131 January 31, 2006 Brady
Patent History
Patent number: D529937
Type: Grant
Filed: Feb 1, 2005
Date of Patent: Oct 10, 2006
Assignee: The William J. Brady Loving Trust (Creve Coeur, MO)
Inventor: William J. Brady (Creve Coeur, MO)
Primary Examiner: Antoine D. Davis
Assistant Examiner: Patricia Palasik
Application Number: 29/222,641
Classifications
Current U.S. Class: Cutting Tool, E.g., Drill Bit, Etc. (D15/139)