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:
Jan. 28, 1992
Filed:
Jan. 29, 1991
Ray D Linderman, Streetsboro, OH (US);
Peter C Williams, Cleveland Heights, OH (US);
Whitey Co., Highland Hts., OH (US);
Abstract
A plug-type, rising stem needle or shut-off valve for controlling fluid flow comprises a valve housing forming a valve chamber with inlet and outlet ports connecting therewith. A bonnet member with a cylindrical passage joins with the valve chamber and opens to the exterior of the valve. A plug valve element is mounted in the chamber and adapted to be moved by an operating stem axially movable within the cylindrical passage. The stem includes a radially extending guide flange. For sealing about the operating stem and limiting the axial outwardly movement of the stem there is an assembly which includes a wall surface that defines a conical chamber at the outer end of the cylindrical passage. The conical chamber tapers from a large diameter at the axial outer end to a smaller diameter at the axial inner end. At the axial inner end of the conical chamber is a cylindrical counterbore carrying a stop ring which forms a radial shoulder for engaging the flange on the stem at a predetermined outer limit position. The stop ring has an axial outer end surface that defines a continuation of the conical chamber. A sealing ferrule is positioned in the conical chamber. The ferrule has a continuous radial outer surface which sealingly engages both the wall surface which defines the conical chamber and the axial outer end surface of the stop ring.