Fuel pump

Claim 1

AN AUTOMOTIVE PUMP COMPRISING A HOUSING INCLUDING A PUMPING CHAMBER, A MOVABLE ELEMENT FORMING A WALL OF SAID PUMPING CHAMBER, MEANS FORMING INLET AND OUTLET PASSAGES IN FLUID COMMUNICATION WITH SAID PUMPING CHAMBER, CHECK VALVE MEANS IN SAID PASSAGE, SPRING MEANS BIASING SAID MOVABLE ELEMENT IN ONE DIRECTION, AND MEANS FOR MOVING SAID MOVABLE ELEMENT IN AN OPPOSITE DIRECTION AGAINST SAID SPRING MEANS BIAS, SAID LAST MEANS INCLUDING A MEMBER MOUNTED WITHIN SAID HOUSING ROR RECIPROCABLE MOVEMENT ALONG A PATH, AN ACTUATING ROD CONNECTED TO SAID MOVABLE ELEMENT AND HAVING A PORTION BIASED BY SAID SPRING MEANS INTO SAID PATH OF SAID RECIPROCABLE MEMBER, A NOISE SUPPRESSOR MEANS FIXED TO SAID ROD PORTION AND INCLUDING A MASS OF RESILIENT PLASTIC MATERIAL BETWEEN SAID ROD PORTION AND SAID RECIPROCABLE MEMBER TO BE COMPRESSED WHEN SAID ROD PORTION AND SAID RECIPROCABLE MEMBER COME TOGETHER, AND A GENERALLY RIGID RETAINER FOR SAID RESILIENT MASS FORMED WITH A RECESS IN WHICH THE RESILIENT MASS IS SEATED WITH A PORTION OF THE MASS EXTENDING FROM THE RECESS WHEN UNCOMPRESSED, SAID RECESS HAVING A VOLUME GREATER THAN THE VOLUME OF THE PORTION OF THE RESILIENT MASS IN THE RECESS WHEN UNCOMPRESSED AND BEING SUFFICIENT TO RECEIVE THE ENTIRE MASS WHEN COMPRESSED BY THE ROD PORTION AND SAID RECIPROCABLE MEMBER COMING TOGETHER, SAID RETAINER PROVIDING A SOLID CONNECTION BETWEEN SAID ROD PORTION AND SAID RECIPROCABLE MEMBER WITH SAID RESILIENT MASS HAS BEEN COMPRESSED WITHIN SAID RECESS.