Fire check and cold start control device for crankcase ventilator

Claim 1

APARATUS FOR USE IN A CRANKCAE VENTILTING CONDUIT EXTENDING BETWEEN THE CRANKCASE AND THE INTAKE MANIFOLD OF AN INTERNAL COMBUSTION ENGINE COMPRISING; A FLOW REGULATOR COMPRISING A CASING, A FLEXIBLE DIAPHRAGM WITHIN THE CASING DIVIDED INTO A FIRST CHAMBER AND A SECOND CHAMBER, SAID FIRST CHAMBER HAVING A GAS INLET AND A GAS OUTLET ADAPTED TO BE CONNECTED INTO SAID CONDUIT FOR THE NORMAL FLOWING DOWNSTREAM THROUGH SID CONDUIT FOR THE NORMAL DIRECTION OF GAS FLOW FROM THE CRANKCASE TO THE INTAKE MANIFOLD WILL FOLW THROUGH SID CASING FROM THE INLET TO THE OUTLET, A VALVE NOZZLE INSIDE THE FIRST CHAMBER, ONE END OF THE NOZZLE COMMUNICATING WITH THE GAS OUTLET, THE OTHER END OF THE NOZZLE TERMINATING IN AN OPEN END ADJACENT SAID DIAPHRAGM, THE OPEN END OF THE NOZZLE BEING AT LEAST PARTIALLY BLOCKED TO THE PASSAGE OF GASES THERETHROUGH BY THE DIAPHRAGM WHEN THE DEAPHRAGM IS DRAWN TO THE OPEN END OF THE NOZZLE BY INTAKE MONIFOLD NEGATIVE PRESSURES IN THE NOZZLE, AND A SPRING SUPPORTED IN THE CASING BIASING THE DIAPHRAGM AWAY FROM THE NOZZLE TO KEEP OPEN SAID OPEN END OF THE NOZZLE FOR OUTLET GAS PRESSURES EQUAL TO AND MORE POSITIVE THAN A PRE-SELECTED GAS PRESSURE; AND A FIRE CHECK AND COLD START CONTROL DEVICE COMPRISING A HOUSING ADAPTED TO BE DISPOSED IN SAID CONDUIT, SID HOUSING HAVING A PASSAGE THERETHROUGH FORMING A PART OF SAID CONDUIT, A VALVE SEAT PROXIMTE SAID PASSAGE IN SAID HOUSING FACING DOWNSTREAM, AND A VALVE ELEMENT IN SAID HOUSING ON THE DOWNSTREAM SIDE OF SAID SEAT, SAID VALVE SEAT AND VALVE ELEMENT BEING COMPOSED OF MAGNETIC MATERIAL AND AT LEAST ONE OF THEM BEING MAGNETIZED SO THAT SAID VELVE ELEMENT IS NOIRMALLY MAGNETICALLY BIASED TO A CLOSED POSITION AGAINST SAID SEAT, SAID VALVE ELEMENT BEING HELD BY THE FLOW OF GASES IN AN OPEN POSITION SPACED DOWNSTREAM FROM SAID VALVE SEAT DURING NORMAL ENGINE OPERATION WHEN THE INTAKE MANIFOLD IS AT A LOWER PRESSURE THAN THE CRANKCASE SO THAT THE VALVE ELEMENT WILL NOT SUBSTANTIALLY INTERFERE WITH CONTROL OF THE FLOW OF BLOWBY GASES BY THE DIPHRAGM, SAID MAGNETIC BIASING FORCE BEING SUFFICIENT TO HOLD THE VALVE ELEMENT IN ITS CLOSED POSITION AGAINST SAID VALVE SEAT WHEN THE ENGINE IS BEING CRANKED DURING COLD ENGINE STARGING CONDITIONS AND THE INTAKE MANIFOLD VACUUM IS LESS THAN DURING NORMAL ENGINE OPERATION, AND THE VALVE ELEMENT ALSO BEING MOVABLE TO A CLOSED POSITION AGAINST SAID SEAT TO BLOCK THE FLAME FRONT FROM THE CRANKCASE UPON A PRESSURE REVERSAL RESULTING FROM BACKFIRING IN THE ENGINE FUEL INTAKE SYSTEM.