Pumps – Motor driven – Including means utilizing pump fluid for augmenting cooling,...
Patent
1987-09-28
1989-04-18
Freeh, William L.
Pumps
Motor driven
Including means utilizing pump fluid for augmenting cooling,...
92117R, 417460, 417410, F01B 1500, F04B 3504
Patent
active
048222542
ABSTRACT:
A pumping arrangement includes an electric motor which has an output shaft having a shaft portion that projects out of the stator of the motor, a crankcase which surrounds the shaft portion and includes an outwardly projecting piston component that is stationary with respect to the motor stator, a cylinder component which is arranged around the piston component, an eccentric element which is mounted on the shaft portion for rotation therewith, an annular force-transmitting element which surrounds the eccentric element, and two connecting units which connect the cylinder component with the force-transmitting element at the opposite sides of the piston component and cause the cylinder component to perform a reciprocating and oscillating movement on the piston component as the force-transmitting element is moved eccentrically with respect to the longitudinal axis of the output shaft by the eccentric element. An impeller mounted on the shaft portion for joint rotation therewith causes ambient air to flow around the cylinder and piston components and thus cool the same. Two reed valves are mounted on a valve plate secured to the piston component and control the flow of the fluid through respective admitting and discharging ports provided in the valve plate.
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Bolthouse, II John H.
Meece Meredith W.
Prien Walter F.
Freeh William L.
TI Pneumotive, Inc.
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