Pumps – Three or more cylinders arranged in parallel – radial – or...
Patent
1995-05-23
1997-05-06
Freay, Charles G.
Pumps
Three or more cylinders arranged in parallel, radial, or...
92 98R, 92100, F04B 112
Patent
active
056264640
ABSTRACT:
The present invention is a wobble plate pump typically used in a reverse osmosis water purification system. The pump has a piston that is coupled to a wobble plate by a rocker arm. The piston has a stem which snaps into a corresponding sleeve of a diaphragm. The diaphragm is attached to the rocker arm and extends across the inner diameter of the pump to provide an inner pump seal. The piston stem and diaphragm sleeve extend through an access opening in a diaphragm support plate. The access opening of the wobble plate has an inner lip defined by a first relatively small radius near the center of the pump and a second relatively larger radius at the outer portion of the pump. The dual radiuses allow the piston to symmetrically reciprocate about a surface of the diaphragm support plate without inducing excessive stresses in the diaphragm. The symmetrical reciprocating motion maximizes the compression ratio of the pump. The manifold plate has outlet passages located in a top portion of the chamber, so that when the pump is mounted in a horizontal position any air collected in the top portion of the chamber will be pushed through the passages. The manifold plate also has an air bleed passage that allows entrapped air to escape the pump chamber when the pump is mounted in a vertical, motor up, position.
REFERENCES:
patent: 3077118 (1963-02-01), Robbins
patent: 4153391 (1979-05-01), Hartley
patent: 4396357 (1983-08-01), Hartley
patent: 4515531 (1985-05-01), Roser
patent: 4610605 (1986-09-01), Hartley
Schoenmeyr Ivar L.
Slagle Dave M.
Aquatec Water Systems, Inc.
Freay Charles G.
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