Carburetor vapor venting device

Claim 1

A CARBURETOR FOR AN INTERNAL COMBUSTION ENGINE, COMPRISING: A MIXTURE PASSAGE; A FUEL RESERVOIR; MEANS FOR SUPPLYING FUEL FROM THE RESERVOIR TO THE MIXTURE PASSAGE IN ACCORDANCE WITH THE QUANTITY OF AIR FLOW THROUGH THE MIXTURE PASSAGE; A THROTTLE VALVE IN THE MIXTURE PASSAGE, SAID THROTTLE VALVE ADAPTED FOR MOVEMENTS BETWEEN CLOSED AND OPENED POSITIONS FOR CONTROLLING THE FUEL-AIR MIXTURE DISCHARGED FROM THE MIXTURE PASSAGE; A SOURCE OF VACUUM; A HOUSING MEMBER; A FIRST PORT IN THE HOUSING, INCLUDING A VALVE MEMBER, COMMUNICATING WITH THE ATMOSPHERE; A SECOND PORT IN THE HOUSING COMMUNICATING WITH THE MIXTURE PASSAGE; MEANS FOR COMMUNICATING BETWEEN THE RESERVOIR AND THE HOUSING; A SUCTION ACTUATED MEMBER SLIDABLY SUPPORTED IN THE HOUSING, SAID SUCTION ACTUATED MEMBER ADAPTED TO OPEN ONE OF THE PORTS AND TO CONCOMITANTLY CLOSE THE OTHER OF THE PORTS; MEANS COMMUNICATING VACUUM FROM THE SOURCE OF VACUUM TO THE HOUSING WITH A PREDETERMINED VALUE OF COMMUNICATED VACUUM ADAPTED TO MOTIVATE THE SUCTION ACTUATED MEMBER; MEANS FOR ASSERTING A BIASING FORCE ON THE SUCTION ACTUATED MEMBER IN OPPOSITION TO THE FORCE EXERTED BY THE PREDETERMINED VALUE OF COMMUNICATED VACUUM WHEREBY SAID MEMBER OPENS THE FIRST PORT AND CLOSES THE SECOND PORT; AND, THEROTTLE CONTROL MEANS FOR OVERCOMING THE BIASING FORCE ON THE SUCTION ACTUATED MEMBER WHEREBY SAID MEMBER CLOSES THE FIRST PORT AND OPENS THE SECOND PORT WHEN THE THROTTLE VALVE IS OPENED A PREDETERMINED AMOUNT AND THE VACUUM FROM THE SOURCE OF VACUUM IS BELOW THE PREDETERMINED VALUE AND INSUFFICIENT TO MOTIVATE SAID MEMBER, SAID CONTROL MEANS INCLUDING A LOOSE LEVER MEANS AND A PICK-UP LEVER MEANS FOR ENGAGING SAID LOOSE LEVER MEANS.