Diaphragm assembly for a pump

Details Diaphragm assembly for a pump Diaphragm assembly for a pump

2008-09-16

2008-09-16

Lopez, F. Daniel (Department: 3745)

Expansible chamber devices

Collapsible chamber wall portion

Wall portion formed of flexible material

Reexamination Certificate

active

11356761

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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patent: 6824139 (2004-11-01), Barinaga et al.
patent: 6883417 (2005-04-01), Headley et al.
patent: 2005/0177201 (2005-08-01), Freeman

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