Washer for mine roof bolt
Description
FIG. 1 is a perspective top and front view of the washer for mine roof bolt showing my new design;
FIG. 2 is a top view thereof;
FIG. 3 is a front view thereof;
FIG. 4 is a left side view thereof; and,
FIG. 5 is an underside view thereof.
Referenced Cited
U.S. Patent Documents
D31242 | July 1899 | McAllister |
2725843 | December 1955 | Koski |
2826108 | June 1958 | Mills |
4619559 | October 28, 1986 | Norris |
Patent History
Patent number: D399730
Type: Grant
Filed: Oct 7, 1996
Date of Patent: Oct 20, 1998
Inventor: Gerald J. Pitre (Bathurst, New Brunswick)
Primary Examiner: B. J. Bullock
Attorney: Mario D. Theriault
Application Number: 0/60,765
Type: Grant
Filed: Oct 7, 1996
Date of Patent: Oct 20, 1998
Inventor: Gerald J. Pitre (Bathurst, New Brunswick)
Primary Examiner: B. J. Bullock
Attorney: Mario D. Theriault
Application Number: 0/60,765
Classifications
Current U.S. Class:
D/8399
International Classification: 0808;
International Classification: 0808;