The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 25, 1991
Filed:
Sep. 27, 1990
Applicant:
Inventor:
Radovan R Maric, Willowdale, CA;
Assignee:
Union Carbide Canada Limited, Mississauga, CA;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F16K / ;
U.S. Cl.
CPC ...
137113 ;
Abstract
An automatic changeover manifold is described which permits an uninterrupted supply of fluid, for example, cryogenic liquified gas, from a source to a fluid delivery conduit. Liquid flow is controlled by solenoid-operated on-off valves which are switched from an open-condition to a closed-condition in response to a detected low pressure condition. When flow ceases in one feed line, the solenoid-operated valve in the other feed line opens. The electrical circuit prevents both solenoid-operated valves from being open at the same time, provided an electric current is present in the circuit.