Abstract: A sealing element is characterized by an upset metal disc having a central opening and reversely positioned annular grooves, and an annular sealing member in each groove. The sealing element as a sealing washer provides for effective sealing engagement with the head of a fastener and the surface of an article being fastened to seal the fastener opening in such article. The sealing element may also be employed as a valve seat and seal in a check valve assembly in which a biased poppet element is carried by the sealing element and is responsive to fluid pressure for controlled passage of fluid through the check valve assembly.

Abstract: Cable seals of the type employed in sealed electrical connectors are maintained in a predetermined orientation throughout manufacture and handling of same whereby the cable seals may be presented in a usable form to automatic assembly equipment for manufacture in cable lead terminations employed in such connectors. According to the method of the invention, the cable seals are integrally molded in a belt which provides a handleable product with the seals being maintained by the belt in a predetermined condition. The cable seals then are punched from the belt and simultaneously inserted into a carrier for subsequent handling while still maintaining the cable seals oriented for use such as in automatic assembly equipment.

Abstract: The present invention provides an improvement in fluid flow control valves which utilize polymeric rubbery materials either as the valve member or the valve seat in the flow control valve. The improvements are obtained by utilizing as the rubbery material for either the valve seat or the valve, a semi-rigid to rigid rubbery material prepared by curing a nitrile rubber with from three to 15 parts of sulfur per 100 parts of rubber. Such cured rubbers when utilized in said application, have been found to overcome the problems exhibited by the rubbery materials heretofore used for such applications.