Control shaft for a valve

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Description

FIG. 1 is a front, right side, and top perspective view of a control shaft for a valve showing my new design.

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

FIG. 3 is a right side elevation view thereof.

FIG. 4 is a front elevational view thereof.

FIG. 5 is a rear elevational view thereof.

Referenced Cited
U.S. Patent Documents
D138325 July 1944 Pool
D253716 December 18, 1979 Spitz
285955 October 1883 Barry
2764181 September 1956 Rieholt
2887128 May 1959 Bloomberg
3107546 October 1963 Rowland
3788601 January 1974 Schmitt
3970285 July 20, 1976 Lonn
3985335 October 12, 1976 Burke
4177835 December 11, 1979 Paley
Patent History
Patent number: D256947
Type: Grant
Filed: Jun 13, 1978
Date of Patent: Sep 16, 1980
Assignee: California Screw Corporation (Paramount, CA)
Inventor: Ralph Terrazas (La Mirada, CA)
Primary Examiner: James R. Largen
Attorney: Arthur Freilich
Application Number: 5/915,170
Classifications
Current U.S. Class: D23/19
International Classification: D2301;