Patent ID: 7927219

Claim:
A torque fluctuation absorbing apparatus provided between a driving source and a transmission and transmitting torque from the driving source to the transmission, the apparatus further absorbing fluctuations in the torque transmitted and limiting a maximum value of torque to be transmitted to the transmission, comprising: a flywheel connected with a driving shaft of the driving source; a supporting member unitarily rotating with the flywheel; a first plate having a sliding surface being corrosion resistant; a second plate having a sliding surface being corrosion resistant; a disc spring supported by the supporting member and biasing one of the first and second plates towards the other one thereof; a friction material sandwiched tightly between the sliding surface of the first plate and the sliding surface of the second plate; and a damper mechanism connected to the friction material and transmitting the torque transmitted from the driving source to an input shaft of the transmission, wherein one of the first and second plates is in contact with the friction material via a corrosion resistant member made of corrosion resistant material, the corrosion resistant member being an annular thin plate fixed to the one of the first and second plates, and wherein an engaging groove is provided on an outer circumference portion of the one of the first and second plates, one of the annular sliding surfaces being configured by engaging a pawl portion of the annular thin plate with the engaging groove.