Fuel injection system

Claim 1

A FUEL PUMPING SYSTEM FOR AN INTERNAL COMBUSTION ENGINE HAVING A CRANKSHAFT AND AN INTAKE MANIFOLD, SAID SYSTEM COMPRISING A DIAPHRAGM TUPE FUEL PUMP ADAPTED FOR CONNECTION TO AN ENGINE AND HAVING A PUMP OPERATING ELEMENT, A PRESSURE SENSITIVE APPARATUS ADAPTED FOR CONNECTION TO THE INTAKE MANIFOLD OF AN INTERNAL COMBUSTION ENGINE, SAID APPARATUS HAVING A DIAPHRAGM MOVABLE IN RESPONSE TO INTAKE MANIFOLD PRESSURE AND A FULCRUM ROD CONTACTING SAID DIAPHRAGM AND MOVABLE THEREBY, A CAM ADAPTED FOR ROTATION IN RESPONSE TO ROTATION OF A CRANKSHAFT OF AN INTERNAL COMBUSTION ENGINE, A LINKAGE MEANS HAVING TWO LEVERS WITH SUBSTANTIALLY OPPOSITELY DISPOSED FULCRUMS, SAID LEVERS BEING DISPOSED SUBSTANTIALLY PARALLEL TO EACH OTHER, SAID FULCRUM ROD POSITIONED BETWEEN SAID LEVERS AND BY ITS POSITION AFFECTING THE AMOUNT OF MOVEMENT THAT ACTUATION OF ONE LEVER IMPOSES UPON THE OTHER, ONE OF SAID LEVERS CONTACTING SAID CAM TO BE ACTUATED THEREBY AND THE OTHER LEVER CONTACTING SAID PUMP OPERATING ELEMENT, ROTATION OF SAID CAM CAUSING MOVEMENT OF SAID PUMP OPERATING ELEMENT TO PUMP FUEL TO THE ENGINE, THE QUANTITY OF FUEL PUMPED BY SAID FUEL PUMP BEING CONTROLLED BY THE POSITION OF SAID FULCRUM ROD BETWEEN SAID LEVERS, AND AT LEAST ONE OF SAID LEVERS HAVING A STOP MEMBER EXTENDING TOWARDS SAID OTHER LEVER AND BEING OF SUCH DIMENSIONS THAT SAID FULCRUM ROD IS SUBSTANTIALLY FREED FROM CONTACT WITH SAID LEVERS FOR AN INTERVAL CORRESPONDING TO A PORTION OF THE ROTATION OF SAID CAM, AND SAID FULCRUM ROD DURING SAID INTERVAL BEING FREELY MOVABLE BY SAID DIAPHRAGM OF SAID PRESSURE SENSITIVE APPARATUS SO THAT SMALL CHANGES IN INTAKE MANIFOLD PRESSURE WILL AFFECT THE POSITION OF SAID FULCRUM ROD.