Importance

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Abstract

The pump of the present invention preferably includes a housing having an inlet port, an outlet port and a chamber located in fluid communication with the inlet port and the outlet port. A diaphragm is sealingly secured in the chamber and, together with the housing, define a fluid passageway from the inlet port to the outlet port. An electromagnetic assembly or other driving device is preferably secured to the housing and is positioned to move the diaphragm in order to pump fluid through the pump. In some preferred embodiments, the electromagnetic assembly includes a plunger positioned and adapted to move the diaphragm against the biasing force of a spring. Improved diaphragms and diaphragm features are also disclosed, including a two-part diaphragm structure, diaphragm sealing portions for sealing the fluid chamber from driving and biasing assemblies of the pump, and inherently biased diaphragms.

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First Claim