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:
Apr. 16, 1985
Filed:
Mar. 11, 1983
Richard W Conley, Pittsburgh, PA (US);
Richard P Tremblay, Pittsburgh, PA (US);
Charles W Bolam, Canonsburg, PA (US);
James E Logan, Pittsburgh, PA (US);
David A Krueger, Harleysville, PA (US);
Kerotest Manufacturing Corp., Pittsburgh, PA (US);
Abstract
A valve includes a molded plastic body portion having an internal chamber with upper and lower portions. Fittings connect the valve to conduits of a piping system. A valve seat surrounds inlet and outlet openings in the chamber lower portion. A plastic plug member is rotatably positioned in the valve seat. The plug member is a molded unitary element. The valve body portion and plug member have a substantially uniform wall thickness throughout. The plug member includes an integral plug portion and an actuator portion which facilitates ease of disassembly of the valve for repair. The plug portion has a flow passage which communicates with the inlet and outlet openings in the valve seat and is rotatable between open and closed valve positions. Seals retained on the plug portion engage the valve seat in the closed position. The actuator portion includes shearable stops which permit 360.degree. rotational operation of the plug member upon failure of the stops under excessive torque. The actuator portion extends upwardly through the chamber upper portion, and a flange portion and a stem portion of th actuator extends above the valve body. The flange portion is spaced circumferentially around the stem portion and overlies in abutting relation an upper circumferential shoulder of the valve body portion. The flange portion bears on the upper shoulder so that impact forces applied to the actuator portion are transmitted away from the stem and plug portions and from the flange portion to the valve body portion for distribution throughout the valve body and to the piping system connected to the valve body. This arrangement prevents the localized concentration of impact forces on the valve actuator.