Title: Three pot two way check valve

Abstract: A three port, two way check valve is disclosed. It is made of a standard tee and standard flanges attached thereto, typically in conformance with API standards. A flat disc is inserted in one of the openings, the disc incorporating an inernal circular valve seat and a hinged valve member which closes against the disc. A similar apparatus is installed in the center port of the tee. The flapper valve elements are connected together by a connecting rod. The connecting rod assures that when one is pulled closed that the other is pulled open. The connecting rod assures that the check valve function is obtained.

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Inventors: Wheatley, Thomas (Houston, TX, US)

Application Number: 578257
Filing Date: 1975-05-16
Publication_date: 1976-08-17
Assignee:
Primary Class(es): 137/102 137/513, 137/527
Other Classes:
US Patent Ref:

878239	Feb, 1908	Rubach	137/513.
1553940	Sep, 1925	Kangieser	137/513.
2711188	Jun, 1955	Nickerson	137/527.
2925825	Feb, 1960	Staiger	137/527.
3202165	Aug, 1965	Yavicoli	137/107.
3394731	Jul, 1968	Elliott	137/527.

Other Refs: 708,139

Apr, 1954	UK

Primary Examiner: Nilson, Robert G.
Assistant Examiner:
Attorney: