A device for the angular adjustment of a camshaft relative to a crankshaft of an internal combustion piston engine, particularly a vane-type adjuster comprising a stator and a rotor arranged coaxially to the stator, vanes of the rotor being pivotable by oil pressure in pressure chambers defined by radial walls of the stator. Fabrication work is reduced compared to stators and rotors made by sinter pressing by the fact that the stator and the rotor are comprised respectively of a stack of stator blanks (2, 2') and a stack of rotor blanks (3, 3'), said blanks are made preferably by punching and are firmly connected to one another.

A high speed gearing assembly includes at least two interengaged composite gears having spur or single helical teeth. Each of the gears is formed of three annular gear parts which rotate about a common axis. The gear parts are juxtaposed in side by side relationship. The central part of each gear is offset relative to its adjacent end parts approximately one half a pitch length. Each end part is approximately one half the width of the central part. With a ratio of tooth engagement length to circular pitch length, i.e. the degree of overlap, of approximately 1.5, increased load capacity, steady running and reduced noise levels are attained.

A wheel assembly includes a cam and a cam gear mounted on a camshaft of an internal combustion engine. The cam gear is constructed of a laminated stack of flat plate members which are disposed in abutting relationship to one another to form a plurality of axially spaced and radially extending interfaces. The cam gear is press fit onto the camshaft and the frictional forces between the gear and the camshaft provide the substantially sole force for maintaining the interfaces between the plate members in abutting relationship at their radially outer ends to form integral tooth members. The cam is also constructed of a laminated stack of flat plate members and press fit onto the camshaft in substantially the same manner as the gear to form an integral cam surface. The plates which form the cam are stamped from the plates that form the gear. The camshaft includes a serrated portion on its outside surface having plurality of axially extending axially tapered teeth that cut into the inner surfaces of the cam and cam gear to secure the cam and cam gear both axially and circumferentially thereon. A method of forming the wheel assembly is also disclosed.

A wheel assembly includes a cam and a cam gear mounted on a camshaft of an internal combustion engine. The cam gear is constructed of a laminated stack of flat plate members which are disposed in abutting relationship to one another to form a plurality of axially spaced and radially extending interfaces. The cam gear is press fit onto the camshaft and the frictional forces between the gear and the camshaft provide the substantially sole force for maintaining the interfaces between the plate members in abutting relationship at their radially outer ends to form integral tooth members. The cam is also constructed of a laminated stack of flat plate members and press fit onto the camshaft in substantially the same manner as the gear to form an integral cam surface. The plates which form the cam are stamped from the plates that form the gear. The camshaft includes a serrated portion on its outside surface having plurality of axially extending axially tapered teeth that cut into the inner surfaces of the cam and cam gear to secure the cam and cam gear both axially and circumferentially thereon. A method of forming the wheel assembly is also disclosed.