192 clutches and power-stop control – Clutches – Fluent material
Patent
1984-04-13
1986-03-11
Freeh, William L.
192 clutches and power-stop control
Clutches
Fluent material
192 82T, 192103F, F16D 3108, F16D 3306
Patent
active
045749299
ABSTRACT:
A viscous fluid coupling including an input member having a disc-shaped rotor, an output member rotatable with respect to the input member and having a housing encircling the rotor, a partition wall in the housing for dividing the inside of the housing into an oil chamber and a working chamber. The rotor is located in the working chamber and a labyrinth device is provided between the rotor and the housing for making it possible to transfer rotation of the rotor to the housing under a supply of viscous oil to the labyrinth device. Perforations are formed in the partition wall for establishing a communication between the oil chamber and the working chamber so that the viscous oil can be supplied from the oil chamber to the working chamber. Oil expelling passages are also provided for connecting radially outward portions of the oil and working chambers so that the viscous oil in the working chamber is expelled to the oil chamber under pumping action of the rotor when the rotor is rotated. A valve is associated with the perforations in the partition wall and, a temperature responsive element is provided for actuating the valve so that the valve is moved between an open position wherein it opens the perforations and a close position wherein it closes the perforations in accordance with a temperature condition. Oil displacing blocks are disposed in the oil chamber and normally maintained at a radially inward position but forced radially outwardly under a centrifugal force when housing is rotated.
REFERENCES:
patent: 3259220 (1966-07-01), Roper
patent: 4266645 (1981-05-01), Crooks
patent: 4312433 (1982-01-01), Bopp
patent: 4469209 (1984-09-01), Hayashi
Hattori Kenji
Hayashi Masaharu
Itakura Masato
Aisin Seiki Kabushiki Kaisha
Freeh William L.
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