Attachment to hammer drills for driving in expansion shell bolts

Description

FIG. 1 is a front right perspective view of an attachment to hammer drills for driving in expansion-shell bolts, showing my new design;

FIG. 2 is a top rear perspective view thereof;

FIG. 3 is a front elevational view thereof;

FIG. 4 is a rear elevational view thereof;

FIG. 5 is a left side elevational view thereof, the opposite side elevational view being a mirror image thereof; and,

FIG. 6 is a top plan view thereof, the bottom plan view being a mirror image thereof.

Referenced Cited
U.S. Patent Documents
D83321 February 1931 Friedman
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D299613 January 31, 1989 Laurie
D327825 July 14, 1992 Oglesby et al.
D356320 March 14, 1995 Catalanotti et al.
D363011 October 10, 1995 Gruner et al.
1743505 January 1930 Turgeon
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3678789 July 1972 Wilson
5327982 July 12, 1994 Trahan et al.
Patent History
Patent number: D376084
Type: Grant
Filed: Jul 18, 1995
Date of Patent: Dec 3, 1996
Inventor: Markku Karvinen (S-212 30 Malmo)
Primary Examiner: James M. Gandy
Assistant Examiner: Robert M. Spear
Law Firm: Tarolli, Sundheim, Covell, Tummino & Szabo
Application Number: 0/41,554
Classifications
Current U.S. Class: D 8/70