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:
Jul. 14, 1992
Filed:
Jul. 29, 1991
Alvin J Matthews, Pittsburgh, PA (US);
Wade A Kunis, East Pittsburgh, PA (US);
Westinghouse Air Brake Company, Wilmerding, PA (US);
Abstract
A valve restoration process including the steps of disassembling the valve into its component parts, applying a cleaning solution to a choke portion, a spring retainer portion, a body portion, a valve seat portion and a valve stem portion of such valve and thereafter cleaning these portions with a brush to remove extraneous foreign material therefrom. Thereafter removing such cleaning solution and relapping such valve stem portion to such valve seat portion to insure a good sealing surface. Finally, removing the lapping component from each of such valve stem and such valve seat and reassembling such valve.