Gas cock

Claim 1

A FLUID FLOW VALVE COMPRISING IN COMBINATION A GAS COCK HAVING AN INLET AND AN OUTLET FOR FLUID FUEL, A VALVE BODY BETWEEN SAID INLET AND SAID OUTLET FOR CONTROLLING THE FLOW THEREBETWEEN, SAID VALVE BODY HAVING A FRONT FACE AND A REAR FACE, AND INLET PORT IN SAID FRONT FACE IN COMMUNICATION WITH SAID INLET, A PASSAGE IN SAID VALVE BODY PROVIDING COMMUNICATION BETWEEN SAID FACES, A ROTARY VALVE MEMBER IN ENGAGEMENT WITH SAID FRONT FACE, MEANS FOR ROTATING SAID ROTARY VALVE MEMBER RELATIVE TO SAID VALVE BODY, AN ARCUATE GROOVE FORMED IN SAID ROTARY VALVE MEMBER, A ROTARY METERING CAM IN ENGAGEMENT WITH SAID REAR FACE FOR VARYING THE EFFECTIVE AREA OF SAID PASSAGE AND A SHAFT INTERCONNECTING SAID ROTARY VALVE MEMBER AND SAID METERING CAM FOR TURNING SAID METERING CAM WITH SAID ROTARY VALVE MEMBER, SAID ROTARY VALVE MEMBER BEING ROTATABLE THROUGH A RELATIVELY WIDE ANGLE WITH RESPECT TO SAID VALVE BODY IN WHICH SAID ARCUATE GROOVE CONNECTS ONE END OF SAID PASSAGE WITH SAID INLET PORT TO PROVIDE UNRESTRICTED FLOW FROM SAID INLET PORT TO SAID PASSAGE AND TO AN EXTREME POSITION IN WHICH SAID PASSAGE IS CLOSED FROM SAID INLET PORT, SAID METERING CAM COOPERATING WITH THE OTHER END OF SAID PASSAGE TO VARY THE EFFECTIVE AREA OF SAID OTHER END AND THEREBY THE FLOW RATE TO SAID OUTLET IN RESPONSE TO THE ANGULAR POSITION OF SAID ROTARY VALVE MEMBER WITH RESPECT TO SAID VALVE BODY.