Hydraulic retarder attached with parking brake

Brakes – Internal-resistance motion retarder – Combined with surface-friction brake

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Details

188291, 192 323, F16F 1100, F16D 5700

Patent

active

048463167

ABSTRACT:
A hydraulic retarder and brake unit mounted on a rotating vehicle drive shaft has a first rotatable member forming a brake drum and mounted on the drive shaft for rotation therewith. A non-rotatable member supports brake shoes movable into frictional engagement with a lining of the brake drum and are actuated by the lever for frictionally braking rotation of the drive shaft. A plurality of stator vanes are formed on the non-rotatable member. A second rotatable member is mounted on the drive shaft for free rotation independently of the rotation of the drive shaft, while a plurality of rotor vanes are freely rotatably mounted around the drive shaft and in facing opposition to the stator vanes for providing a hydraulic coupling. A clutch selectively rotatably couples the second rotatable member with the first rotatable member so that the rotor vanes are rotated with the drive shaft and the rotation of the drive shaft retarded. In an alternative embodiment, the clutch selectively rotatably couples the second rotatable members with the non-rotatable member and there is also included a planetary gear system including a sun gear formed on the second rotatable member, a ring gear formed with the rotor vanes and planet gears meshing with the sun and ring gears and rotatably mounted to the first rotatable member.

REFERENCES:
patent: 2118188 (1958-05-01), Gallup
patent: 2292633 (1942-08-01), Griswold
patent: 2517531 (1950-08-01), Anderson
patent: 2750017 (1956-06-01), Ahlen
patent: 2787170 (1957-04-01), Forster
patent: 3041892 (1962-07-01), Schjolin
patent: 3130827 (1964-04-01), Beeskow
patent: 3882975 (1975-05-01), Jedlitschke et al.
patent: 4235320 (1980-11-01), Polak et al.
patent: 4711328 (1987-12-01), Bazilio et al.

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