Toothed wheel transmission has interengaging cogged wheels wherein operating engagement angle of teeth is less than fourteen degrees

摘要

The toothed wheel transmission has two inter-engaging cogged wheels (1,4) wherein the operating engagement angle of the teeth (2,3) is less than 14 degrees to minimise the effect of a change in position on the toothed flank clearance. The wheels are preferably mounted in a housing whereby the housing and wheels have different coefficients of heat expansion.