Patent ID: 6591735
Filing Date: 2003-07-15
Classification: F04B

Abstract:
A swashplate type compressor that compresses a gas, said compressor comprising:a cylinder block, a main bore, a secondary bore, a housing and a crank chamber defined by the cylinder block and the housing; a driveshaft having first and second ends and rotatably mounted in the cylinder block such that the first end is disposed within the crank chamber; a swashplate mounted on the first end of the driveshaft; a piston having a head region, a swashplate engaging region, and an extra support surface; the main bore capable of slideably receiving the head region and the secondary bore capable of slideably receiving the extra support surface such that the main and secondary bores allow the linear reciprocation of the piston; a groove located between the secondary bore and the extra support surface, the groove allowing communication between the secondary bore and the crank chamber and substantially avoiding compression of gas within the secondary bore.