Combination ball valve and check valve

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Information

Patent Grant
D321928

References
Source

Patent Number
D321,928
Date Filed
Tuesday, February 28, 1989
35 years ago
Date Issued
Tuesday, November 26, 1991
33 years ago

Inventors
- Joseph V. Milo
Original Assignees
- Universal Valve Co., Inc.
Examiners
- Largen; James R.
Agents
- Eckert Seamans Cherin & Mellott

US Classifications
- D23 - Environmental heating and cooling
Field of Search
- US
- 137 6142
- 251 288
- 251 309
- D23 233-237
- D23 244-248
- Term of Grant
  14Years

Information

Abstract

Description

Claims

The ornamental design for a combination ball valve and check valve, as shown and described.

US Referenced Citations (16)

Number	Name	Date	Kind
D297354	Wirth	Aug 1988
596871	Grist	Jan 1898
904299	Best	Nov 1908
2182930	Nordstrom	Dec 1939
2547116	Gould	Apr 1951
2615672	Hinrichs	Oct 1952
2708096	Mueller	May 1955
3093358	Klakeman	Jun 1963
3132837	Britton	May 1964
3491796	Scaramucci	Jan 1970
3865130	Mullis	Feb 1975
3954251	Callahan, Jr. et al.	May 1976
4126023	Smith et al.	Nov 1978
4193579	Massey	Mar 1980
4649952	Jobe	Mar 1987
4770388	Carman	Sep 1988