Patent ID: 6343539
Filing Date: 2002-02-05
Classification: F04B,F05C

Abstract:
A pump diaphragm, comprising:a first layer formed from a first material which is adapted to be substantially impervious to liquids, the first layer including inner and outer peripheral portions which define inner and outer peripheral edges, respectively; a second layer disposed in laminar juxtaposition to the first layer and formed from a second material adapted to possess a high level of flexibility and resiliency, the second layer including inner and outer peripheral portions which define inner and outer peripheral edges, respectively, the outer peripheral portion of the second layer being nested within the outer peripheral portion of the first layer, the inner peripheral portion of the second layer being nested within the inner peripheral portion of the first layer; and wherein the pump diaphragm is configured such that at least portions of the first and second layers are moveable relative to each other.