Valve construction for reciprocating type compressor

Claim 1

IN A VALVE CONSTRUCTION, THE COMBINATION COMPRISING A SEAT MEMBER INCLUDING RADIALLY SPACED ANNULAR PORTIONS CONNECTED BY RADIALLY EXTENDING PORTIONS TO PROVIDE A PLURALITY OF CIRCUMFERENTIALLY INTERRUPTED ANNULAR INLET PASSAGES, AN ANNULAR VALVE FOR EACH OF SAID PASSAGES AND CLOSING THE SAME WHEN SEATED AGAINST SAID SEAT MEMBER, SAID VALVES HAVING OPPOSED GENERALLY CONCENTRIC PERIPHERAL EDGES, A STOP MEMBER LIMITING MOVEMENT OF SAID VALVES AWAY FROM SAID SEAT MEMBER, SPRING MEANS OPERATIVELY INTERPOSED BETWEEN SAID STOP MEMBER AND VALVES FOR URGING THE LATTER TOWARD SAID SEAT MEMBER, SAID STOP MEMBER HAVING GROOVES IN ITS FACE WHICH OPPOSES SAID SEAT MEMBER AND ALSO HAVING OUTLET PASSAGES WHICH COMMUNICATE WITH SAID INLET PASSAGES WHEN SAID VALVES ARE UNSEATED, AND ELONGATED SEGMENTS CONSTRUCTED OF APOLYMER OF ETHYLENE SUCH AS TETRAFLUOROETHYLENE REMOVABLY DISPOSED PARTIALLY IN SAID GROOVES AND BEING DIMENSIONED FOR A PRESS FIT WITH THE WALLS OF SAID GROOVES, SAID SEGMENTS HAVING EXPOSED ARCUATE CIRCUMFERENTIALLY ELONGATED SURFACE PORTIONS GENERALLY CONCENTRIC WITH SAID PERIPHERAL EDGES AND GUIDINGLY ENGAGING THE SAME DURING MOVEMENT OF SAID VALVES.