Patent ID: 9057445
Filing Date: 2015-06-16
Classification: F16K

Abstract:
1. A closure disc for a butterfly valve for use in the unloading of granular material, said closure disc being structured to provide for greater accelerated flow of the granular material from a tank trailer and through the butterfly valve during unloading, said disc having a sufficient diameter to dispose said disc in direct contact with an internal bore of the butterfly valve when manipulated into closure, and said disc provided for manipulation at least approximately 90° to provide for opening of the butterfly valve during performance of an unloading procedure, said disc having diametrically opposed sockets, one of the opposed sockets provided for accommodating the location of a pivot pin of the butterfly valve therein, and the other opposed socket provided for accommodating the locating of an operating shaft of the butterfly valve therein, said other opposed socket having a stepped configuration upon an outer surface, so as to reduce the surface area against which the granular material impinges when the butterfly valve is opened during an unloading process, said other opposed socket also having compound sockets provided internally therein, corresponding to the stepped configuration of the external portion of the socket, so as to accommodate the stepped configuration of the operating shaft therein to provide for a structured connection for operating of the valve disc, in preparation for either opening of the disc for unloading of granular material therethrough, or to be pivoted into closure, when it is desired to close the butterfly valve after completion of an unloading function and said sockets incorporate shallow shoulders that bias against an inner surface of the butterfly valve bore opening, with the remainder of a greater cylindrical structure of each socket extending outwardly of a periphery of the internal bore, and extending into the butterfly valve to accommodate the insertion of the pivot pin and the operating shaft within the respective sockets, during assembly and usage of the butterfly valve for unloading purposes.