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:
Sep. 28, 1976
Filed:
Nov. 18, 1974
John D Tricini, Greensburg, PA (US);
Kerotest Manufacturing Corporation, Pittsburgh, PA (US);
Abstract
The diaphragm valve has a valve body portion with a chamber therein. The chamber has an open top portion and an inlet and outlet communicating therewith. The valve body has a valve seat in the chamber. The valve member is positioned in overlying relation with the valve seat and is arranged to control the flow of fluid through the chamber. A yoke member connected to the valve body within the upper portion of the valve chamber has an axial passageway therethrough. A bonnet having a passageway therethrough is coaxially aligned within the yoke member. A valve stem is arranged for reciprocal movement within the yoke member and bonnet passageway. A diaphragm assembly is positioned within the valve chamber between the valve stem and the valve member. A spring urges the valve member upwardly against the underside of the diaphragm assembly to open the valve. A packing ring surrounds the valve stem and is positioned within an annular recessed portion of the bonnet passageway. A follower member surrounds the valve stem and overlies the packing ring in the recessed portion. A bearing plate surrounding the valve stem in the yoke member passageway abuts the top portion of the follower member. Bolt means threadably engaged within bores of the yoke member abut the bearing plate and apply preselected compressive forces thereto. The compressive forces are transmitted from the bearing plate through the follower to the packing ring to thereby maintain a fluid and pressure tight seal between the bonnet and the valve stem in the bonnet passageway. The yoke member, together with the packing ring, follower member and the bearing plate prevent the expulsion of broken valve components out of the valve in the event of excessive pressure build-up within the valve chamber.