Retractable emergency wash fountain with cam-actuated shut-off valve

Claim 1

A RETRACTABLE EMERGENCY WASH FOUNTAIN, COMPRISING: A SUPPORTING BASE HAVING A BORE OPENING AT ONE END TO THE EXTERIOR OF SAID BASE AND A WATER INLET PASSAGE EXTENDING TRANSVERSELY OF AND COMMUNICATING AT ONE END WITH SAID BORE; A SPRAY HEAD HAVING A TUBULAR END JOURNALED IN SAID BORE INCLUDING A CYLINDRICAL CAM BODY LOCATED DIRECTLY OPPOSITE SAID ONE DND OF SAID PASSAGE; SAID CAM BODY HAVING AN EXTERNAL, CIRCUMFERENTIALLY EXTENDING GROOVE, THE DEPTH OF WHICH VARIES AROUND THE BODY, WHEREBY THE BOTTOM WALL OF SAID GROOVE DEFINES A CAM SURFACE; A VALVE MOUNTED FOR AXIAL MOVEMENT IN SAID PASSAGE AND INCLUDING A VALVE STEM ENGAGING IN SAID GROOVE; A SPRING ACTING BETWEEN SAID BASE AND VALVE FOR URGING THE LATTER TOWARD SAID CAM BODY TO A POSITION IN WHICH THE END OF SAID STEM SEATS AGAINST SAID CAM SURFACE, WHEREBY SAID VALVE IS MOVED AXIALLY BY SWINGING OF THE SPRAY HEAD; SAID SPRAY HEAD BEING SWINGABLE BETWEEN RETRACTED AND WASHING POSITIONS WITH RESPECT TO SAID BASE AND SAID VALVE BEING MOVABLE TO A FIRST POSITION UPON SWINGING OF SAID SPRAY HEAD TO SAID RETRACTED POSITION AND TO A SECOND POSITION UPON SWINGING OF SAID SPRAY HEAD TO SAID WASHING POSITION; A VALVE SEAT DISPOSED ABOUT SAID PASSAGE FOR ENGAGEMENT BY SAID VALVE TO CLOSE SAID PASSAGE WHEN SAID VALVE OCCUPIES ITS FIRST POSITION, SAID VALVE BEING SPACED FROM SAID SEAT TO OPEN SAID PASSAGE WHEN THE VALVE OCCUPIES ITS SECOND POSITION; AND SAID SPRAY HEAD HAVING A WATER PASSAGE EXTENDING AXIALLY THROUGH SAID TUBULAR END AND SAID CAM BODY TO A POSITION OPPOSITE SAID PASSAGE AND THEN RADIALLY TO THE EXTERIOR OF SAID CAM BODY INTO COMMUNICATION WITH SAID INLET PASSAGE.