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:
Dec. 04, 1979
Filed:
Oct. 12, 1978
Michael R Ridenour, Angola, IN (US);
Evans Products Company, Portland, OR (US);
Abstract
A thermostatically operated dual action control mechanism for controlling fluid actuatable devices such as the shutter and the fan clutch in the cooling system of a diesel engine in vehicles. A valve rod is provided and movable between first and second positions. In the first position, the valve rod seals off communication between a source of fluid under pressure and one of the fluid actuatable devices. In the second position of the valve rod communication is established between the fluid source and the fluid actuatable device. A hollow passageway is provided in the valve rod, and in the first position of the valve rod is open to allow fluid to flow through to the other fluid actuatable device of the devices. In the other position, the passageway is closed off by a reciprocating needle valve and simultaneously permits fluid to be exhausted from the other fluid actuatable device. A thermally responsive sensor element actuates the valve rod between the first and second positions thereof.