Rotary expansible chamber devices – Collapsible progressively deformed working chamber wall
Patent
1995-05-24
1996-06-25
Vrablik, John J.
Rotary expansible chamber devices
Collapsible progressively deformed working chamber wall
418 50, 417474, F04C 500
Patent
active
055294685
ABSTRACT:
A peristaltic pump having a shaft mounted within a housing and coupled with a rotor to induce nutation in a wobble plate. A pump diaphragm is located and affixed to one side of the wobble plate and at its periphery to the housing. A backup diaphragm is employed on the other side of the wobble plate and provides a resilient coupling through a driven plate with the rotor. A pump casing associated with the diaphragm defines a pump cavity with the pump diaphragm. An inlet and an outlet having ball check valves or flapper valves control flow. An insert in the pump diaphragm has an oblong minor cross section and is employed to couple with the wobble plate. Mounting elements on the insert extend from one side of the diaphragm which may be formed in the relaxed state and biased inwardly toward one another for mounting to the wobble plate. A boss associated with the diaphragm and a cavity associated with the wobble plate help to further strengthen the diaphragm at the insert. The boss overlies the insert and fits with the cavity to aid in the retention of the diaphragm.
REFERENCES:
patent: 2636444 (1953-04-01), Salgues
patent: 3058428 (1962-10-01), Gemeinhardt
patent: 3194167 (1965-07-01), Wilson
patent: 3922119 (1975-11-01), Rosenquist
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