Patent ID: 7753020

Claim:
A gearwheel mechanism of an internal combustion engine for driving a secondary unit ( 102 ) running synchronously with a primary unit ( 108 ), with a driving gearwheel ( 114 ) mounted to the primary unit and with a driven gearwheel ( 110 ) mounted on the secondary unit ( 102 ), there being provided and mounted only on the driving gearwheel as a mounting aid a positioning element ( 118 ) comprising a flat positioning disc ( 120 ) which is mounted onto the end face of the driven gearwheel ( 110 ) and has at least one covering sector ( 124 ) covering the teeth of a section of the driven gear wheel ( 110 ) which makes mounting of the gearwheels possible only in certain preferred rotary-angle orientations of the driven gearwheel ( 110 ) in relation to the driving gearwheel ( 114 ).