Swash plate type compressor

In a swash plate type compressor comprising a pair of axially connected cylinder blocks having therein a plurality of axially extending cylinder bores, a plurality of double headed compressor pistons slidably fitted in said cylinder bores, a drive shaft axially centrally extending through said cylinder blocks and having thereon a swash plate capable of rotating with said drive shaft for causing a reciprocatory compression of each of said double headed compressor pistons between two compression dead centers, each said double headed piston being formed, between two piston heads thereof, with an axially central recess in which a generally outer part of said swash plate is arranged so as to establish an operative connection between each said piston and said swash plate,

• the improvement comprising:
• said axially central recess of each said piston having a bottom surface, a part of which protrudes toward an outer surface of said swash plate, said protruding part being provided as an abutment capable of immediately contacting said outer surface of said swash plate as soon as only a given amount of rotation of each said double headed compressor piston about its own axis occurs during the running of the compressor, said protruding part having its axial length determined so that when each said double headed compressor piston approaches one of said compression dead centers, an outer edge of said generally outer part of said swash plate which also approaches one of said compression dead centers comes away from said protruding part and an inner edge of the generally outer part of the swash plate stays at a position adjacent to the protruding part.