Drill bit for retrieving broken bolts

Description

FIG. 1 is a perspective view of the drill bit for retrieving broken bolts embodying the design of the present invention;

FIG. 2 is a front elevational view thereof, the rear being a mirror image of the front shown in FIG. 2;

FIG. 3 is a side elevational view thereof, the side opposite being a mirror image of the side shown in FIG. 3;

FIG. 4 is a top plan view thereof; and,

FIG. 5 is a bottom view thereof.

Referenced Cited
U.S. Patent Documents
D318227 July 16, 1991 Halm
4713990 December 22, 1987 Poiling
4777850 October 18, 1988 Polonsky
4831902 May 23, 1989 McClure
Other references
  • Illinois cat. dated May 24, 1965, p. 28 Drill bit series No. 73400.
Patent History
Patent number: D345495
Type: Grant
Filed: Dec 5, 1991
Date of Patent: Mar 29, 1994
Inventor: Daniel E. Priddy (Stokesdale, NC)
Primary Examiner: Nelson C. Holtje
Assistant Examiner: J. H. Musgrove
Attorney: Terry M. Gernstein
Application Number: 7/802,456
Classifications
Current U.S. Class: D 8/70