Partially preloaded pump diaphragms

Details Partially preloaded pump diaphragms Partially preloaded pump diaphragms

F - Mech Eng,Light,Heat,Weapons

04

B

F04B 43/02 (2006.01) F04B 43/00 (2006.01) F04B 45/04 (2006.01)

Patent

CA 2413376

A partially preloaded diaphragm having an outer attachment portion defining a first plane (P) and disposed about an axis substantially perpendicular to the first plane. An inner attachment portion is disposed substantially perpendicular to the axis of the outer attachment portion and defines a second plane (C). The inner attachment portion is movable away from the outer attachment portion into a fully extended pumping position defining a third plane (F). The first plane and the second plane are spaced at a distance to define a preload distance (PC) when the diaphragm is at rest, and the first and third plane are spaced to define a pump stroke distance (PF) when the diaphragm is fully extended. The preload distance is from about 25 percent to about 85 percent of the pump stroke distance.

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