Abstract: An improved flexible drive coupling is provided in which a driver and driven mechanisms are in adjacent housings that are fixedly connected by a shroud through which the drive coupling extends. The driver and driven gear hubs, respectively, are interconnected through a flexible spacer member having corresponding meshing gear elements wherein the spacer and at least one of said gear hubs have longitudinally extending, aligning lines which are slideably engageable when the gear elements of said spacer and hub are in spaced-apart relation to maintain the gear elements in meshing alignment where said respective housings and shroud are moved longitudinally toward each other during assembly. Thus external access is provided for positioning said gear elements in meshing alignment before said housings and shroud are brought into final mating position.

Abstract: A flexible drive coupling for power transmission shafts having coupling elements of plastic material containing improved metal elements therein to form strengthened locking means for securing the coupling elements on the coupled transmission shafts.