Patent ID: 6125981
Filing Date: 2000-10-03
Classification: F16D

Abstract:
A temperature sensitive fluid fan coupling apparatus comprising:a rotary shaft having a rotational axis;a drive disc fixed to said rotary shaft being and rotatable therewith, the drive disc having an outer periphery;a box having an inner portion, said box being rotatably mounted on the rotary shaft such that the drive disc is within the inner portion of the box;a partition plate secured in the box and separating the inner portion of the box into an oil reserving chamber and a torque transmission chamber, such that the drive disc is disposed in the torque transmission chamber;a dam formed on the box at a location in the torque transmission chamber opposed to the outer periphery of the drive disc;an oil circulating flow passage extending from a location in the torque transmission chamber adjacent the dam to a location in the oil reserving chamber;an oil supply hole formed through the partition plate at a location in proximity to the outer periphery and extending from the oil reserving chamber to the torque transmission chamber;a valve member in the oil reserving chamber for selectively opening and closing the supply hole;an actuator extending from a location externally of said box into the oil reserving chamber, the actuator cooperating with the valve for selectively opening and closing the supply hole; anda pair of barrages extending from the partition plate on opposite respective sides of the supply hole to portions of the box that are opposite the partition plate in the oil reserving chamber.