Patent ID: 8496451
Filing Date: 2013-07-30
Classification: F04B

Abstract:
1. A diaphragm assembly for an air driven diaphragm pump, comprising a piston including an inflexible core having a hub with a periphery and a first end, a plate extending radially from about the periphery of the hub and a center attachment concentrically arranged in the hub and accessible from the first end of the hub, the plate defining the inflexibility of the piston, a unitary diaphragm body molded with the inflexible core in situ, the unitary diaphragm body having a plurality of connective tendons extending through the plate, and a thermoplastic coating about the plate and the periphery of the hub also in situ in the molded unitary diaphragm body, the unitary diaphragm body being of thermoplastic elastomer having at least a thermally miscible surface with the thermoplastic coating; a peripheral flexible portion outwardly of the piston and integrally molded with the unitary diaphragm body.