Crankcase ventilation control means

Claim 1

A FLOW METERING VALVE ADAPTED FOR USE IN MAN AUTOMOTIVE CRANKCASE VENTILATION SYSTEM COMPRISING A VALVE HOUSING HAVING AN INLET END AND AN OUTLET END, METERING ORIFICE OF A UNIFORM DIAMETER DISPOSED WITHIN THE HOUSING INTERMEDIATE THE ENDS THEREOF, A SPRING LOADED METERING PLUNGER DISPOSED IN SAID HOUSING, SAID PLUNGER HAVING A BODY PORTION OF A LESSER DIAMETER THAN SAID METERING ORIFICE, BEING MOVABLE TOWARDS AND AWAY FROM SAID OUTLET END IN RESPONSE TO CHANGES IN PRESSURE IN SAID VENTILATION SYSTEM, AND BEING SUPPORTED BY A COMPRESSION SPRING HAVING A PLURALITY OF COILS, ONE OF SAID COILS ENGAGING A PORTION OF SAID PLUNGER TO URGE SAID PLUNGER AGAINST A WALL PORTION OF SAID ORIFICE SO THAT PORTIONS OF SAID PLUNGER ALONG ITS LENGTH RIDE AGAINST SAID WALL PORTION IN ALL OPERATIVE POSITIONS OF SAID PLUNGER TO DAMPEN OSCILLATIONS OF THE PLUNGER, THE SIDE OF SAID PLUNGER OPPOSITE FROM THE SIDE RIDING AGAINST SAID WALL PORTION BEING SPACED FROM ALL WALL PORTIONS OF THE ORIFICE TO PERMIT FLUID FLOW THROUGH SAID SPACE.