Pumps – Diverse pumps – Series
Patent
1975-03-17
1976-11-16
Freeh, William L.
Pumps
Diverse pumps
Series
F04B 2312
Patent
active
039921310
ABSTRACT:
A two-stage pump assembly employs a rotary-type gerotor pump combined with a reciprocating axial piston-type pump both mounted on and driven by a common shaft of a motor. A single key drivingly connects the rotor of the gerotor pump and the angle plate of the axial piston pump to the shaft of the motor for simultaneous operation of the two pumps. A wear sleeve is seated on the shaft of the motor and coacts with an oil seal carried by a common wall between the motor and the gerotor housing to prevent leaking of the fluid being pumped.
REFERENCES:
patent: 3380392 (1968-04-01), Boers
patent: 3548715 (1970-12-01), Bobst
patent: 3614267 (1971-10-01), Schultze
Boers Jan H.
Masterman James I.
McClocklin Samuel B.
Solie James C.
Freeh William L.
LaPointe G. P.
Owatonna Tool Company
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