Fuel pump and filter assembly

Claim 1

A FUEL PUMP COMPRISING: (A) AN SPRING HOUSING HAVING A RIM AT ONE END DEFINING AN OPENING, (B) A DIAPHRAGM POSITIONED ACROSS SAID OPENING AND HAVING A PERIPHERAL EDGE FIXED TO SAID RIM, (C) AN ELONGATED CYLINDRICAL PUMP HOUSING HAVING OPPOSED OPEN AND CLOSED ENDS, SAID OPEN END SEALABLY ENGAGING SAID RIM OF SAID SPRING HOUSING TO FORM A FUEL INLET CHAMBER, (D) A DIAPHRAGM ACTUATING MEANS POSITIONED IN SAID SPRING HOUSING INCLUDING AN ELONGATED ROD HAVING ONE END ATTACHED TO SAID DIAPHRAGM AND HAVING THE OTHER END ENGAGING AN OPERATING LEVER, (E) A FIRST THIN METAL PLATE FIXED ACROSS SAID PUMP HOUSING AND SPACED FROM SAID DIAPHRAGM TO DEFINE A PUMPING CHAMBER, (F) A PLURALITY OF THIN WALLED CUPS DEPENDING FROM FIRST THIN METAL PLATE INTO SAID FUEL INLET CHAMBER AND OPENING INTO SAID PUMPING CHAMBER, CHECK VALVE MEANS IN EACH OF SAID RESPECTIVE CUPS FOR CONTROLLING THE FLOW OF FUEL PASSING THROUGH SAID PUMPING CHAMBER, (G) A THIN WALL FILTER HOUSING REMOVEABLY CONNECTED TO SAID PUMP HOUSING AND FORMING A FILTER CHAMBER, (H) A FILTER DISPOSED IN SAID FILTER CHAMBER, (I) AT LEAST ONE OF SAID CUPS BEING IN FLUID COMMUNICATION WITH SAID FUEL INLET CHAMBER TO RECEIVE FUEL FROM THE LATTER, (J) ANOTHER OF SAID CUPS BEING COMMUNICATED WITH SAID FILTER CHAMBER FOR RECEIVING FUEL FROM THE PUMPING CHAMBER AND PASSING THE SAME TO SAID FILTER COMPARTMENT, (K) AN INLET CONDUIT COMMUNICATED WITH SAID FUEL INLET CHAMBER AND ADAPTED TO CONNECT TO A SOURCE OF FUEL FOR CIRCULATING THE LATTER IN SAID FUEL INLET CHAMBER PRIOR TO THE INTRODUCTION OF FUEL TO SAID AT LEAST ONE CUP, (L) DISCHARGE MEANS COMMUNICATED WITH SAID FILTER CHAMBER FOR CONDUCTING FUEL THEREFROM.