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:
Feb. 13, 1979
Filed:
Apr. 28, 1977
Jesse H Turner, Auburn, IN (US);
Jack D Raymer, Auburn, IN (US);
Essex Group, Inc., Fort Wayne, IN (US);
Abstract
A four way valve assembly for a reversible cycle refrigeration system in which a rotary valve accomplishes the switching between heating and cooling modes. The rotary valve is mounted in a cavity in a housing and is designed to be rotated by a unidirectional electric motor. The rotary valve comprises a plate having a pair of recesses in it, which each acts to connect a pair of ports in a base plate together. A high pressure bypass port maintains the pressure in the cavity at a relatively high level such that the high pressure tends to increase the abutting contact between the valve plate and the base plate. A cam and switch arrangement provides the necessary control to stop and start the electric motor.