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:
Jul. 24, 1979
Filed:
May. 19, 1977
Daniel A Ellis, Decatur, IL (US);
Mueller Co., Decatur, IL (US);
Abstract
A gate valve structure for use in mains carrying fluids, the gate valve structure being provided with an improved valve seat arrangement. The gate valve includes a casing having an unobstructed through-bore and a substantially rectangular shape or elongated chamber communicating with the through-bore in which a gate or disc member reciprocates between closed and opened positions of the valve. The valve casing is provided with a valve seat surrounding one of the ports in the casing defined at the intersection of the through-bore by the elongated chamber, the valve seat lying generally in a plane which converges at an acute angle to a plane normal to the axis of the through-bore and the seat has an upper planar portion facing the other of the ports except at the bottom portion where it merges smoothly into and forms a portion of the unobstructed through-bore. The gate member is provided with a resilient seal member for seating on the valve seat, the seal member having a configuration to conform to the seat so that the seal member is not damaged during opening or closing of the valve by edges in the interior of the valve resulting from the machining of the valve seat. Further, because of the irregular shape of the resilient seal member, means are provided so that the seal member may be properly oriented onto the gate member during assembly and the gate member is provided with ears which cooperate with guideways in the valve casing in such a manner as to minimize rock of the gate member during opening and closing of the valve regardless of the direction of flow of fluid through the valve and, thus, eliminating problems resulting in damaging of the resilient seal member from the wedging action in closing.