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. 30, 2014
Filed:
Jul. 23, 2010
Mark W. Moeller, Kingston, MA (US);
Peter Kirby, Derry, NH (US);
Theodore D. Ciolkosz, Plymouth, MA (US);
Robert A. Jencks, Mendon, MA (US);
Mark W. Moeller, Kingston, MA (US);
Peter Kirby, Derry, NH (US);
Theodore D. Ciolkosz, Plymouth, MA (US);
Robert A. Jencks, Mendon, MA (US);
Waters Technologies Corporation, Milford, MA (US);
Abstract
A valve includes a rotor and a stator. The rotor and the stator each have seal surfaces for contacting and sliding against one another during operation of the valve. Either or both of the rotor and the stator have a seal-surface coating formed by depositing an at least partially amorphous interlayer on a substrate and depositing a surface layer, including diamond-like carbon, on the interlayer. The surface layer requires no mechanical polishing.