Title: Cryogenic circuit

Abstract: A cryogenic circuit which comprises a tank for the liquid and vapor phase of the cryogen; there being a flow control valve connected at opposite ends to the liquid and vapor sides of said tank with a check valve being interposed between said vapor side and said flow control valve. The flow control valve contains a single outlet orifice directly connected to the vapor inlet. A valve arrangement is interposed between the liquid inlet of the said flow control valve and its single outlet; said valve arrangement comprising a ball valve with associated components between same and the liquid inlet to cause said valve to operate as a control valve and with a spring bearing against the upper side of said ball to adapt same for check valve usage when the associated control valve components are withdrawn under predetermined pressure conditions.

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Inventors: Spaulding, Roy H. (St. Louis County, MO, US)
Snyder, Fred P. (St. Louis County, MO, US)

Application Number: 650166
Filing Date: 1976-01-19
Publication_date: 1978-03-28
Assignee: Essex Cryogenics Industries, Inc. (St. Louis, MO)
Primary Class(es): 62/50.4 137/539.5
Other Classes:
US Patent Ref:

2481713	Sep, 1949	Bertea	137/539.
2645906	Jul, 1953	Ryan	62/51.
2916061	Dec, 1959	Hahn et al.	62/51.
2958204	Nov, 1960	Spaulding	62/51.
2964919	Dec, 1960	Howlett	62/52.
3018635	Jan, 1962	Keckler	62/51.
3151640	Oct, 1964	Teston	62/50.

Other Refs:
Primary Examiner: Capossela, Ronald C.
Assistant Examiner:
Attorney: Kalish; Ralph W.