Adjustable pressure relief valve

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Description

FIG. 1 is a perspective view of an adjustable pressure relief valve showing my new design;

FIG. 2 is an elevational view taken from one side thereof, the opposite side being a mirror image of the side shown;

FIG. 3 is a front elevational view thereof;

FIG. 4 is a rear elevational view thereof;

FIG. 5 is a bottom plan view thereof; and

FIG. 6 is a top plan view thereof.

Referenced Cited
U.S. Patent Documents
432140 July 1890 Kilborn
2166742 July 1939 Lambert
2254209 September 1941 Buttner et al.
2601563 June 1952 Selwyn
2666448 January 1954 Garretson et al.
2674260 April 1954 Thrush
2697915 December 1954 Chisholm
2931385 April 1960 Carlisle et al.
3702141 November 1972 Wetterhorn
Patent History
Patent number: D242709
Type: Grant
Filed: Sep 8, 1975
Date of Patent: Dec 14, 1976
Inventor: Ralph W. Schourup (Rosemead, CA)
Primary Examiner: James R. Largen
Attorney: Harold C. Weston
Application Number: 5/611,068
Classifications
Current U.S. Class: D23/19
International Classification: D2301;