Combination ball valve and check valve

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Description

FIG. 1 is a perspective view of the combination ball valve and check valve showing my new design.

FIG. 2 is a top plan view thereof;

FIG. 3 is a bottom plan view thereof;

FIG. 4 is a left end elevational view thereof;

FIG. 5 is a right end elevational view thereof;

FIG. 6 is a rear elevational view thereof; and,

FIG. 7 is a front elevational view thereof.

Referenced Cited
U.S. Patent Documents
D297354 August 23, 1988 Wirth
596871 January 1898 Grist
904299 November 1908 Best
2182930 December 1939 Nordstrom
2547116 April 1951 Gould
2615672 October 1952 Hinrichs
2708096 May 1955 Mueller
3093358 June 1963 Klakeman
3132837 May 1964 Britton
3491796 January 1970 Scaramucci
3865130 February 1975 Mullis
3954251 May 4, 1976 Callahan, Jr. et al.
4126023 November 21, 1978 Smith et al.
4193579 March 18, 1980 Massey
4649952 March 17, 1987 Jobe
4770388 September 13, 1988 Carman
Patent History
Patent number: D321928
Type: Grant
Filed: Feb 28, 1989
Date of Patent: Nov 26, 1991
Assignee: Universal Valve Company, Inc. (Elizabeth, NJ)
Inventor: Joseph V. Milo (Rockaway, NJ)
Primary Examiner: James R. Largen
Law Firm: Eckert Seamans Cherin & Mellott
Application Number: 7/318,191