Viscous fluid transmissions.

摘要

A viscous fluid transmission including a rotary casing (10; 100) adapted to receive a viscous fluid and a rotary element (13; 113) within the casing.

Means (31, 30, 28, 27; 131,130) is provided for pumping the fluid from its normal position in the casing into a holding reservoir (26) or other displaced zone so as to reduce the quantity of fluid in contact with the rotary element and hence the transmitted torque. Means (35-45; 152-159) is also provided for varying the pumping action to modify the quantity of fluid in the casing.