Lifting jack

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Description

FIG. 1 is a front and side perspective view of a lifting jack showing my new design;

FIG. 2 is a top, rear and side perspective view thereof;

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

FIG. 4 is an exploded front perspective view of the lifting assembly. The reaming portion of the lifting jack being omitted for convenience of illustration; and,

FIG. 5 is a top plan view thereof.

Referenced Cited
U.S. Patent Documents
66170 June 1867 Patterson
829344 August 1906 Larsen
2469670 May 1949 Thompson
2536550 January 1951 Hughes
2786649 March 1957 Bottorff
2786650 March 1957 Bottorff
2910270 October 1959 Schultz
3081066 March 1963 Murawski
3426752 February 1969 Laico
3662994 May 1972 Johns
4194726 March 25, 1980 Hance
4640495 February 3, 1987 Parsons
4846443 July 11, 1989 Collins et al.
5190265 March 2, 1993 Barry et al.
Patent History
Patent number: D345843
Type: Grant
Filed: Apr 8, 1992
Date of Patent: Apr 5, 1994
Inventor: Harvey C. Collins (Marine City, MI)
Primary Examiner: Kay H. Chin
Law Firm: Harness, Dickey & Pierce
Application Number: 7/866,239