Brakes – Internal-resistance motion retarder – Using a rotary-type fluid damper
Patent
1981-11-06
1984-07-10
Stoner, Jr., Bruce H.
Brakes
Internal-resistance motion retarder
Using a rotary-type fluid damper
188293, 192 4B, 192 58A, 60360, F16D 5702, F16H 5710
Patent
active
044587929
ABSTRACT:
An automotive retarder in which an outer toroid of at least one inner hydrodynamic operating cycle is bounded by inner surfaces of shells of at least two impellers engaged in the operating cycle. One of the impellers is adapted to be positioned by a thrust torque with another impeller by a counter support torque. The shell of the impeller which can be positioned by the thrust torque is provided with at least one aperture to reduce losses under idling conditions of the retarder. An annular slide valve is arranged concentrically with respect to an axis of rotation of the retarder with a sealing surface being provided on the valve which is stationary with respect to the valve. The annular slide valve may be displaced relative to the outlet aperture into a braking position such that the outlet aperture is closed off by the sealing surface of the annular slide valve and into at least one idling position unblocking the outlet opening to a greater or lesser extent. The associated sealing surface has an outline or configuration corresponding to the outer toroid and, in a braking position, the sealing surface is at least approximately flush with an inner surface of the shell of the impeller adapted to be positioned by the thrust torque.
REFERENCES:
patent: 1640608 (1927-08-01), Klimek
patent: 2987887 (1961-06-01), Fowler
patent: 3270838 (1966-09-01), Schweizer
patent: 3952508 (1976-04-01), Bopp
patent: 4043434 (1977-08-01), Braschler
Thomas Wolfram
Zaiser Wolfgang
Daimler-Benz Aktiengesellschaft
Oberleitner Robert J.
Stoner Jr. Bruce H.
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