Fuel injection pumping apparatus

Claim 1

A fuel injection pumping apparatus comprising a rotary distributor member mounted in a housing, a transverse bore in the distributor member and a pair of plungers therein, cam followers located at the outer ends of the plungers for engagement with cam lobes formed on the internal peripheral surface of a cam ring, passage means in the distributor member for conveying fuel to and from the bore, a cup shaped member secured to a drive shaft of the apparatus, the cup shaped member being positioned about the distributor member and having slots therein to accommodate the followers, the distributor member being driven from the drive shaft, an annular member of cup shaped form axially slidable within the cup shaped member and in sliding engagement with the inside surface thereof, inclined surfaces defined on said annular member for engagement with complementary surfaces on said followers or plungers thereby to limit the outward movement of the plungers, said cup shaped member having a base wall and apertures in the base wall and pins extending through said apertures respectively, and means including a further member which is axially movable and which is in engagement with said pins for moving said annular member axially relative to the cup shaped member.