Check valve

Claim 1

A check valve to be interposed within a pipe line for receiving spheroids therethrough and comprising a housing having substantially aligned inlet and outlet ports of a substantially identical diametrical size corresponding to the diametrical size of the pipeline and providing a fluid passageway through the valve, port means providing access to the interior of the housing, valve seat means provided in the housing, closure means pivotally secured in the housing cooperating with the valve seat for providing alternate open and closed positions for the valve, cover means removably secured on said access port means, bumper means provided on said cover means for limiting movement of the closure member in the opening direction whereby said closure member in the full open position thereof is completely removed from the fluid passageway determined by the aligned inlet and outlet ports for providing full opening of the valve, liner means provided in the housing for reducing the cross-sectional area of a portion of the interior thereof to a size corresponding to the size of the inlet and outlet ports for receiving spheroids moving in a reverse direction through the valve and reducing expansion of the size of the spheroids within the housing, and means provided on said valve seat for facilitating discharge of the reverse moving spheroids from the valve, and wherein the bumper means comprises a substantially semi-cylindrical flange member secured to the cover means and extending into the interior of the valve, the inwardly directed surface defined by the edge of the flange being angularly disposed with respect to the longitudinal axis of the housing to provide said angular position for the closure member in the full open position thereof, a yieldable bumper member element provided on the outer edge of the flange member for engaging the closure means to limit the movement thereof in the opening direction.