Patent ID: 6932043

Claim:
An ancillary unit drive adapter for use in an engine block which has at one end a lateral flange formed with an aperture for mounting of the ancillary unit, the drive adapter comprising a casing for mounting on the end face of the engine to overlie the aperture, a shaft journalled in the casing, a formation at one end of the shaft to enable the shaft to be coupled to the input shaft of the ancillary unit and a cog solid with the opposite end of the shaft for meshing with an engine driven gear, and characterised in that faces on the opposite sides of the cog serve in use as bearing surfaces to withstand axial forces acting in both directions on the drive shaft further comprising a cover encasing the end face of the engine, which cover is formed with a raised ridge for contacting the bearing surface on the cog to limit axial displacement of the drive shaft.