Hand operated air pump for use in composting operations

Description

FIG. 1 is an exploded front, top and side perspective view a hand operated air pump for use in composting operations showing my new design;

FIG. 2 is an exploded front elevational view thereof; the rear, top and bottom being a mirror image;

FIG. 3 is an exploded end view thereof;

FIG. 4 is an exploded end elevational view thereof as seen from the opposite end of FIG. 3; and,

FIG. 5 is a reduced perspective view thereof in assembled condition.

Referenced Cited
U.S. Patent Documents
D322471 December 17, 1991 Myers
669118 March 1901 Kindermann
817538 April 1906 Wixon
1330266 February 1920 Holstein
3904326 September 1975 Clement
4569275 February 11, 1986 Brunet
4712592 December 15, 1987 Brown
4932849 June 12, 1990 Scheffer
Patent History
Patent number: D352093
Type: Grant
Filed: Sep 23, 1993
Date of Patent: Nov 1, 1994
Inventor: Joseph A. Knycha (Jerseyville, ON)
Primary Examiner: Wallace R. Burke
Assistant Examiner: Robin V. Taylor
Attorney: Terry M. Gernstein
Application Number: 0/13,370
Classifications