Power transfer unit

Details Power transfer unit Power transfer unit

1987-02-25

1988-08-16

Look, Edward K.

Power plants

Pressure fluid source and motor

Apparatus having means responsive to or ameliorating the...

60420, 417271, F04B 116, F04B 1700

Patent

active

047634723

ABSTRACT:
A power transfer unit coupling two otherwise separate hydraulic systems for bidirectional transfer of hydraulic power therebetween without transfer of fluid between the two systems. Control of the power transfer unit is effected using only hydraulic pressures, and static operation of the unit is maintained without power transfer until a determined pressure differential between the coupled systems is achieved to reduce wear and increase service life of the unit. Once dynamic power transferring operation of the unit is initiated, a pressure differential lower than the determined level is maintained between the two systems.

REFERENCES:
patent: 3890064 (1975-06-01), Boehringer et al.
patent: 4168652 (1979-09-01), Bick
patent: 4286927 (1981-09-01), Boehringer
patent: 4297086 (1981-10-01), McGowan

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