Refrigerant compressor having improved drive power transmission unit

A refrigerant compressor comprising:

• a drive shaft driven for rotating by an external drive power transmitted from an external drive source;
• a compressing mechanism housed in a housing means for compressing a refrigerant gas in response to a rotation of said drive shaft;
• and
• a drive power transmission means having a pulley means mounted around said drive shaft for receiving a drive power supplied from said external drive source to drive said drive shaft for rotation,
• wherein said drive power transmission means further comprises:
• a power transmitting means fixed to a front end of said drive shaft outwardly extending from said housing means of said compressor;
• a shock absorbent rubber means elastically deformably arranged between and in contact with said pulley means and said drive power transmitting means which shock absorber means extends annularly around the drive shaft;
• and
• positive engagement means for providing a positive engagement between said shock absorbent rubber means and at least one of said pulley means and said power transmitting means, said positive engagement means becoming inoperative by disengaging the pulley means from the power transmitting means when a predetermined load is applied to the refrigerant compressor.