Piston ring groove for fluorocarbon seal rings

Claim 1

IN COMBINATION WITH AN AIR CONDITIONING COMPRESSOR HAVING FRONT AND REAR CYLINDER BLOCKS PROVIDED WITH A PAIR OF OPPOSEDAXIALLY ALIGNED CYLINDRICAL BORES, A DOUBLE-ACTING PISTON ASSEMBLY INSTALLED FOR RECIPROCATION IN SAID OF CYLINDRICAL BORES COMPRISING, A CYLINDRICAL DOUBLE-ACTING PISTON HAVING A PERIPHERAL GROOVE ADJACENT EACH PISTON HEAD EACH SAID PERIPHERAL GROOVE INCLUDING FRONT AND REAR RADIALLY EXTENDING SPACED SIDE WALLS AND A BOTTOM WALL, FRONT AND REAR ANNULAR RECESSES RECESSED BELOW EACH END OF EACH SAID BOTTOM WALL ANDDEFINING SAID BOTTOM WALL THEREBETWEEN, FRONT AND REAR V-SECTIONED RIDGES ASYMMETRICALLY LOCATED ON THE PERIHPERY OF EACH SAID BOTTOM WALL, SAID FRONT RIDGE LOCATED FORWARD OF AND ADJACENT TO THE MEDIAL TRANSVERSE PLANE OF ITS ASSOCIATED GROOVE, SAID REAR RIDGE LOCATED ABOUT HALF-WAY BETWEEN SAID MEDIAL TRANSVERSE PLANE AND SAID GROOVE REAR SIDE WALL, THE V-SECTIONED RIDGES HAVING THEIR PEAKS RADIALLY LOCATED SUBSTANTIALLY INTERMEDIATE SAID BOTTOM WALL AND THE OUTER DIAMETER OF THE PISTON, AN ELATIC FLEXIBLE SEAL RING RECEIVED IN EACH OF SAID GROOVES, EACH SAID SEAL RING BEING CONTINUOUS ANNULAR AMMBER OF POLYTETRAFLUORETHYLENE MATERIAL HAVING AN ARCUATE CROSS-SECTION, EACH SAID SEAL RING NORMALLY IN THE FORM OF A WASHER HAVING SMOOTH INNER AND OUTER PERIPHERAL SURFACES, EACH SAID SEAL RING HAVING A THICKNESS SUBSTANTIALLY EQUAL TO THE RADIAL DEPTH OF ITS GROOVE MEASURED BETWEEN THE DIAMETER OF THE GROOVE BOTTOM WALL AND THE DIAMETER OF SAID PISTON, THE SEAL RINGS BEING POSITIONER IN THEIR RESPECTIVE GROOVES WITH EACH SEAL RING OUTER SMOOTH SURFACE REFERENCED SUBSTANTIALLY FLUSH WITH THE PISTON DISMETER AND EACH SEAL RING FORWARD AND REAR EDGE BEING POSITIONED ADJACENT ITS ASSOCIATED GROOVE RADIAL SIDE WALL, SAID V-SECTIONAL RIDGES OF EACH GROOVE PENETRATING THE INNER PERIPHERAL SMOOYH SURFACE OF ITS ASSOCIATED SEAL RING AN AMOUNT SUFFICIENT TO SEAT THE RINGS THEREIN IN A SEALED MANNER SUCH THAT SEAL RING MAINTAINS A GENERALLY ARCUATE SHAPED IN CROSS SECTION, AND THE ASYMMETRICAL POSITIONING OF THE GROOVE V-SECTIONED RIDGES INSURES THAT THE FRONT AND REAR EDGES OF EACH SEAL RING IS RECEIVED INTO ITS ASSOCIATED GROOVE FRONT AND REAR ANNULAR RECESSES AN AMOUNT SUFFICIENT TO DEFINE A CLEARANCE BETWEEN THE FORWARD PORTION OF THE SEAL RINGS AND THE OUTER DIAMETER OF THE PISTO TO INSURE THAT EACH OF THE PISTON HEADS WILL BE READILY RECEIVED INTO THEIR ASSOCIATED OPPOSED CYLINDRICAL BORES