Is a
Patent attributes
Patent Jurisdiction
Patent Number
Date of Patent
September 16, 2008
Patent Application Number
11356761
Date Filed
February 17, 2006
Patent Citations Received
Patent Primary Examiner
Patent abstract
A diaphragm assembly is provided which includes one or more pistons and a frame circumscribing the piston or pistons. The diaphragm assembly is useful with a wobble plate pump. The piston or pistons and frame are made of different materials. For example, the piston is made of a material that has a greater stiffness, hardness or rigidity than the material of which the frame is made. The piston will not undergo substantially ballooning over long term use of the diaphragm assembly.
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