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:
Apr. 25, 1978
Filed:
May. 14, 1976
Everett T Steele, Jr, Knoxville, TN (US);
Robertshaw Controls Company, Richmond, VA (US);
Abstract
A three port valve construction having a onepiece plastic valve housing body provided with a stepped cylindrical opening through one end thereof that defines a pair of spaced annular shoulders, the body having three ports therein transversely disposed to the opening and respectively intersecting with the opening with one port being located between the shoulders and the other two ports being respectively disposed outboard of the shoulders. One of the shoulders defines a first valve seat and an annular plastic valve seat member is ultrasonically welded to the other of the shoulders to define a second valve seat. An axially movable valve member is slidingly disposed in the opening to control the first and second valve seats.