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Publication numberUSD321928 S
Publication typeGrant
Application numberUS 07/318,191
Publication dateNov 26, 1991
Filing dateFeb 28, 1989
Publication number07318191, 318191, US D321928 S, US D321928S, US-S-D321928, USD321928 S, USD321928S
InventorsJoseph V. Milo
Original AssigneeUniversal Valve Company, Inc.
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Combination ball valve and check valve
US D321928 S
Abstract  available in
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  1. The ornamental design for a combination ball valve and check valve, as shown and described.

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.

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US7806235Oct 4, 2007Oct 5, 2010Curtis RoysEnvironmental compressor protection assembly
US8069950Oct 4, 2007Dec 6, 2011Coltec Industrial Products LlcEnvironmental compressor protection assembly
US8622082Apr 14, 2009Jan 7, 2014Coltec Industrial Products LlcCheck valve and method and apparatus for extending life of check valves
US8997936Dec 6, 2011Apr 7, 2015Compressor Products International LlcEnvironmental compressor protection assembly
U.S. ClassificationD23/245