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:
Sep. 24, 2002
Filed:
Mar. 06, 2001
Applicant:
Inventors:
Jon A. Nichols, Santa Rosa, CA (US);
Burney L. Baron, Rohnert Park, CA (US);
Assignee:
Rheodyne, LP, Rohnert Park, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F16K 1/1074 ;
U.S. Cl.
CPC ...
F16K 1/1074 ;
Abstract
A rotary fluid switching valve has facewise adjacent rotor and stator faces of materials that result in an exceptionally long lifetime. One face is of a fluorocarbon-containing polymer, while the other face is Tungsten Carbide/Carbon (WC/C). The WC/C coating is preferably on a metal stator which has machined ports to accept tubing fittings that connect to stator passages that extend to the interface of stator and rotor.