Hydraulic pumps or motors and hydrostatic transmitting systems

Details Hydraulic pumps or motors and hydrostatic transmitting systems Hydraulic pumps or motors and hydrostatic transmitting systems

1989-07-27

1990-06-12

Butler, Douglas C.

Brakes

Internal-resistance motion retarder

Using a rotary-type fluid damper

418 21, F16D 5700, F04C 218, F04C 1504

Patent

active

049325043

ABSTRACT:
An axial variable capacity rotary pump which yields a stepless change of capacity. The pump has a casing with an inlet and outlet, at least one rotary member with engaging elements mounted on the periphery of the rotary member for engaging a mating member, and a pair of axial sealing element which seal either axial side of the rotary member. One sealing element moves together with the rotary member axially to change a length of a sealed working chamber between the members, thereby changing the delivery capacity per revolution of the pump.

REFERENCES:
patent: 3593828 (1971-07-01), Klein et al.
patent: 3805928 (1974-04-01), Caradot
patent: 4497393 (1985-02-01), Brems
patent: 4740142 (1988-04-01), Rohs et al.

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