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:
Jun. 07, 1983
Filed:
Jan. 05, 1981
John D Muchow, Long Beach, CA (US);
Valve Concepts International, Carson, CA (US);
Abstract
The invention is an improved self-centering, floating metal seal to be used in combination with a ball valve which controls the flow of fluid in a conduit. The ball valve includes a valve body which has a bore extending therethrough and which also has an inlet and an outlet which are axially aligned and adapted to be mechanically coupled to the conduit. The valve body also has an aperture therein. The ball valve also includes a spherical valve member having a port the axis of which is alignable with the axis of the bore of the valve body and a stem having an inner end mechanically coupled to the spherical valve member and an axially outer end which extends through the aperture of the valve body. The ball valve further includes a device for forming a seal between the aperture of the valve body and the stem. The improved self-centering, floating metal seal includes a metal ring which has a planar surface and a contoured surface which is adapted to contact the spherical surface of the valve member and which is axially aligned with the bore of the valve body and is disposed adjacent to the spherical valve member. The seal also includes a metal piston which has a first planar surface which is disposed adjacent to the planar surface of the metal ring and a second planar surface. There is a difference in the dynamic sealing areas of the piston and metal ring so that the upstream pressure mechanically seals the ball valve.