Check valve casing

- GSW Limited/Limitee

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Description

FIG. 1 is a top perspective view of a check valve casing showing my new design;

FIG. 2 is a bottom perspective view thereof;

FIG. 3 is a bottom plan view thereof;

FIG. 4 is a top plan view thereof.

Referenced Cited
U.S. Patent Documents
D242709 December 14, 1976 Schourup
D242710 December 14, 1976 Schourup
274787 March 1883 Kilborn
1360960 November 1920 Kudla
2296135 September 1942 Batson et al.
2945508 July 1960 Schweisthal
3189040 June 1965 Johnson
3503418 March 1970 Petrucci et al.
4168723 September 25, 1979 Schneider
Patent History
Patent number: D260280
Type: Grant
Filed: Jun 5, 1978
Date of Patent: Aug 18, 1981
Assignee: GSW Limited/Limitee (Toronto)
Inventor: John F. Campbell (Guelph)
Primary Examiner: James R. Largen
Application Number: 5/912,561
Classifications
Current U.S. Class: D23/22
International Classification: D2301;