Patent ID: 7870801
Filing Date: 2011-01-18
Classification: F02N,F16N,Y10T

Abstract:
1. A rotational torque transfer device comprising: a first rotary member having an inner cylindrical periphery, and further including a gear having an outer cylindrical periphery formed with gear teeth on which lubricating oil is coated; and a second rotary member, having an outer cylindrical periphery and press fitted to the first rotary member to allow the outer cylindrical periphery to be placed in face-to-face relation to the inner cylindrical periphery of the first rotary member, which is operative such that when either the first rotary member or the second rotary member is imparted with a rotational torque greater than a given value, a slippage occurs between the first rotary member and the second rotary member for interrupting a transfer of the rotational torque, wherein a grease composed of a mixture of oil and molybdenum disulfide is coated on at least one of the first rotary member and the second rotary member, the oil having a higher frictional coefficient than that of the lubricating oil, the lubricating oil including at least one of ester family oil or α-olefin family oil and the grease containing molybdenum disulfide in a proportion ranging from 50 to 70%.