Leslie Hartridge Limited

Leslie Hattridge Limited

Norman Morris

Securing means for use in a drive coupling between rotary drive means and a tang-ended shaft of the pump of a fuel injection system, the securing means comprising a block which has (a) a hole or recess in it which provides mutually inwardly facing surfaces for engaging the opposite sides of such a tang end, or two parts of an adaptor between which such a tang end is held, (b) two laterally displaced screwthreaded bores extending from opposite outer sides of the block to the hole or recess, opening out respectively on the said mutually inwardly facing surfaces, (c) two slots each of which extends, in a plane which is transverse in relation to the respective screwthreaded bore, from a side of the block, at which the slot is open, across the screwthreaded bore and beyond it, to a closed end of the slot, stresses in the material of the block tending to shift material of the block on one side of the slot relative to the material of the block on the other side of the slot, and (d) two fixing screws which extend respectively through the two screwthreaded bores on both sides of the respective slot so that rotation of the screws is resisted by the material of the block.

Securing means

An internally splined rotary anti-backlash component is adapted to engage an externally splined injection-pump shaft end. Fixing pins extend radially through the component and have wedge-shaped ends which protrude into gaps between the splines of the shaft end. This inhibits backlash between the component and the shaft end for a predetermined sense of rotation of the component relative to itself. The component can be disengaged from the shaft end, turned around back-to-front, and re-engaged, to allow the sense of drive to be reversed.

Rotary anti-backlash component

An adaptor for use in connecting a drive coupling to a non-splined end of a pump shaft. The adaptor has means at one end thereof for connecting the adaptor to the end of the pump shaft, at least one flat by which the drive coupling can be made rotationally fast with the adaptor, and an opposite end of circular cross-section for location in a hole or recess of corresponding circular cross-section in the drive coupling to align an axis of the coupling with that of the pump shaft.

Growing community of inventors

Buckingham, United Kingdom

Norman Morris