Valving structure for fire hydrant

Claim 1

IN A FIRST HYDRANT THE COMBINATION COMPRISING: A HYDRANT SHOE HAVING AN UPWARDLY-OPENING MOUTH PROVIDED WITH A SMOOTH INTERIOR SURFACE; A BUSHING LINING SAID MOUTH AND HAVING A SMOOTH EXTERIOR SURFACE OPPOSED TO SAID INTERIOR SURFACE; DRAIN TUBES SNUGLY FITTING PAIRS OF ALIGNED RADIAL APERTURES IN SAID SHOE AND BUSHING FOR RETAINING THE LATTER IN THE FORMER; MEANS DEFINING CIRCUMFERENTIAL GROOVES BETWEEN THE OPPOSED SURFACES OF SAID SHOE AND SAID BUSHING, ONE ABOVE AND ONE BELOW SAID DRAIN TUBES; A RESILIENT PRESSURE-DEFORMABLE SEALING RING IN EACH OF SAID GROOVES AND ENGAGED WITH THE BOTTOM THEREOF AND WITH THE CORRESPONDING ONE OF SAID OPPOSED SURFACES TO FORM A SEAL BETWEEN SAID BUSHING AND SHOE; A VALVE SEAT RING THREADEDLY ENGAGED WITHIN SAID BUSHING AND HAVING ON ITS INNER END A DOWNWARDLY FACING VALVE SEAT, SAID RING ALSO HAVING A RADIAL DRAIN VALVE PORT; MEANS DEFINING A CIRCUMFERENTIAL GROOVE BETWEEN THE OPPOSED SURFACES OF SAID BUSHING AND RING AND PROVIDING COMMUNICATION BETWEEN SAID PORT AND SAID TUBES; A RECIPROCATING VALVE STEM CARRYING A VALVE WASHER FOR SEATING AND UNSEATING COOPERATION WITH SAID SEAT; SLIDE VALVE MEANS CARRIED BY SAID STEM FOR COOPERATION WITH THE INNER END OF SAID PORT TO OPEN THE LATTER WHEN SAID WASHER IS SEATED ON SAID SEAT AND CLOSE SAID PORT WHEN SAID WASHER IS UNSEATED; AND NONCIRCULAR INTERFITTING MEANS CARRIED BY SAID STEM AND RING FOR RESTRAINING RELATIVE ROTATION THEREBETWEEN.