Liquid fuel injection pumping apparatus

Claim 1

A liquid fuel injection pumping apparatus for supplying fuel to an internal combustion engine comprising a rotary distributor member rotatably mounted within a body part and arranged in use to be driven in timed relationship with an associated engine, at least two radial bores formed in the distributor member, said bores being disposed in the same radial plane and meeting each other at their inner ends and having their axes angularly off-set, a passage communicating with the inner ends of the bores, plungers in said bores respectively, port means defined by the distributor member and body part and through which fuel can flow to said bores through said passage to effect outward movement of the plungers, a cam ring surrounding said distributor member and having cam lobes formed thereon which during rotation of the distributor member impart simultaneous inward movement to said plungers, further port means defined by the distributor member and body part through which fuel displaced from said bores, as the plungers are moved inwardly, can flow to the associated engine, the inner ends of the plungers being shaped so that when the plungers have moved inwardly their maximum extent, substantially the whole of the space of the inner ends of the bores will be occupied by the plungers, each plunger having an axial slot defined therein which extends from the inner end of the plunger, the apparatus including a plate-like member located in the slots in the plungers respectively and acting to retain the plungers against angular movement within the bores.