Bladder fuel pump

Claim 1

IN A SMALL FUEL PUMP ADAPTED TO BE MOUNTED IN AND SUPPORTED BY FUEL LINE OF AN INTERNAL COMBUSTION ENGINE FOR REMOTE OPERATION AND WHICH COMPRISES, A SMALL ELONGATE HOLLOW SHELL OPEN AT ONE END, A UNIDIRECTIONAL INLET MEANS AND OUTLET MEANS IN SAID SHELL SPACED FROM THE OPEN END THEREOF, A CAP FOR THE OPEN END OF SAID SHELL, SAID CAP INCLUDING RESILIENT MEANS, HAVING A SNAP-OVER RELATION THERETO, AND A PUMPING ELEMENT IN SAID SHELL COMPRISING A THIN WALLED, DIGITAL-SHAPED POUCH OF FLACCID MATERIAL PROJECTING INTO SAID SHELL SPACED FROM THE WALLS THEREOF, THE MARGINS OF SAID POUCH BEING SUPPORTED AND CONFINED AROUND THE EDGES OF THE OPEN END OF SAID SHELL BETWEEN THE SHELL AND THE CAP, SAID POUCH BEING OTHERWISE UNSUPPORTED IN SAID SHELL, SAID CAP HAVING AN OPENING TO RECEIVE REMOTE PULSATIONS FROM THE CRANK CASE OF AN ENGINE, THAT IMPROVEMENT WHICH COMPRISES A RADIALLY EXTENDING SURFACE ON SAID CAP TO LIE DIRECTLY ADJACENT A SIMILAR RADIAL SURFACE AT THE END OF SAID SHELL, WHEREIN THE PERIPHERAL PORTIONS OF SAID PUMPING ELEMENT ARE CONFINED BETWEEN SAID RADIAL SURFACES, AND CIRCUMFERENTIALLY SPACED MINUTE PROJECTIONS AROUND ONE OF SAID SURFACES FOR PROJECTING INTO ENGAGEMENT WITH THE PERIPHERAL PORTIONS OF SAID PUMPING ELEMENT TO LOCK IT BETWEEN SAID SURFACES.