Viscous fluid coupling device

Details Viscous fluid coupling device Viscous fluid coupling device

1994-08-18

1996-07-16

Lorence, Richard M.

192 clutches and power-stop control

Clutches

Fluent material

192 82T, F16D 3502

Patent

active

055358683

ABSTRACT:
A viscous fluid coupling device comprises a housing; a partition board dividing an internal space in the housing into a storage chamber and an operation chamber, the partition board having first communicating holes to communicate the storage chamber with the operation chamber; a rotor which is provided in the operation chamber and is secured to one end portion of a drive shaft so as to rotate together with the drive shaft; a valve provided in the storage chamber to open and close the first communicating holes; and a rod having one end secured to the valve and the other end secured to the inner peripheral portion of a spiral bimetal. The rod is rotatably supported by the housing and the housing and the rotor have labyrinth grooves in the surfaces which are confronted with each other. The viscous fluid coupling device further comprises a second communicating hole which is located radially inwardly of the labyrinth grooves to discharge the viscous fluid from the operation chamber into an internal space of the operation chamber when the viscous fluid is raised high in temperature; and a temperature responding member connected to a seal member to open and close the second communicating hole.

REFERENCES:
patent: 3363734 (1968-01-01), Sabat
patent: 4606445 (1986-08-01), Rockey
patent: 4979601 (1990-12-01), Hagiwara et al.
patent: 5190131 (1993-03-01), Hagiwara et al.

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