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:
Mar. 14, 1995
Filed:
May. 20, 1994
Barry G O'Connell, Geneva, OH (US);
James M Lorenz, Madison, OH (US);
Leonard H Brown, Highland Heights, OH (US);
Perfection Corporation, Madison, OH (US);
Abstract
A ball valve construction particularly suited for forming large diameter ball valves includes a main valve body formed from extruded plastic pipe and having a central through passage with a valve ball mounted centrally therein. An operating stem extends from the ball outwardly of the main body. First and second separate seat retainer rings are positioned on opposite sides of the valve ball. Each retainer ring has an outer surface carrying a seal for engaging the wall of the through passage for preventing fluid flow between the retainer rings and the wall of the through passage. Each retainer ring further defines a spherical seat surface positioned and sized to sealingly engage the valve ball. Adjustable tie rod members join between the retainer rings to cause the seat surfaces to engage the valve ball with a predetermined sealing force.