Patent ID: 7850558

Claim:
A power transmission apparatus for a compressor, comprising: a pulley rotated by driving power transmitted from an engine; a hub connected to a driving shaft of a compressor, for transmitting the driving power transmitted through the pulley to the driving shaft; a limiter having a plate shaped configuration disposed between the pulley and the hub, for transmitting power and cutting off power transmission between the pulley and the hub when load exceeds a predetermined value in the compressor; and a damper connected to the limiter and the pulley, for absorbing impact due to a torque change, the damper comprising an outer ring having a first cylindrical body and coupled to the pulley, an inner ring having a mounting flange and a second cylindrical body, the mounting flange being coupled to the limiter and having a center-hole in the center for rotatably receiving the hub and the second cylindrical body being formed integrally with the mounting flange and being positioned inside the first cylindrical body, and an elastic portion disposed between the outer ring and the inner ring, for absorbing impact due to the torque change, wherein the limiter is adapted to cut off power transmission by breakage of a neck portion formed between the inner ring and the hub, wherein the limiter, in its plate shaped configuration, comprises: a middle portion providing screw engagement with an outer circumferential surface of the hub, an outside portion coupled to the damper, and a breakable neck portion disposed between the middle portion and the outside portion by a plurality of through-portions formed on the outside portion, said neck portion being breakable between said middle portion and an edge portion by the plurality of said through portions formed on said outside portion and wherein the mounting flange is formed to extend towards the center of the inner ring by a predetermined width, such that the mounting flange covers the limiter so as not to be exposed to the outside.