Bolt head and nut sizing gauge


FIG. 1 is a top plan view of a bolt head and nut size determining tool or the like showing my new design;

FIG. 2 is a left side elevational view;

FIG. 3 is a front elevational view, the rear elevational view being an identical image;

FIG. 4 is a right side elevational view;

FIG. 5 is a bottom plan view; and,

FIG. 6 is another front elevational view thereof, showing the particular bolt head and nut size gauges in varying positions.

Referenced Cited
U.S. Patent Documents
363331 May 1887 Hammer
466044 December 1891 Jacobs
867001 September 1907 Bromley
992873 May 1911 Riggins
1186807 June 1916 Litomy
1369829 March 1921 Minges
1787424 January 1931 Altenbach
1840135 January 1932 Schutt
4006613 February 8, 1977 Zion
Patent History
Patent number: D319404
Type: Grant
Filed: Oct 19, 1988
Date of Patent: Aug 27, 1991
Inventor: Robert F. Jackson, Sr. (Orange Park, FL)
Primary Examiner: Nelson C. Holtje
Assistant Examiner: Antoine D. Davis
Attorney: Arthur G. Yeager
Application Number: 7/259,626