Abstract: A synchronization device for gear shaft mechanisms includes an outer synchronization ring which is formed as a deep-drawn plate section which is toothed on its outer perimeter to correspond to locking cogs of a clutch sleeve and a coupler. The outer synchronization ring has a conical friction surface in its middle area and locking tabs on its inner circumference in a deep-drawn bottom area thereof. The locking tabs provide a form-locked solid coupling with a synchronizer which has mating recesses which open outward radially and extend inward radially from an outer periphery of the synchronizer. A dimensionally exact and simple manufacturing of the outer synchronizing ring is provided in very few work steps enabling the synchronization device to be attractive for many uses which were previously avoided due to cost.

Abstract: A friction lining (5) for a device which is cooled with fluid or lubricant and is intended for transferring torque, in particular a friction clutch, synchronizing element or brake, the friction lining being fastened on a carrier body (2) in order to form a friction surface (6) and the torque being transferred to a counter-surface, is constructed from at least two different layers, and in particular from at least one porous substrate (11, 11') which is fastened on the carrier body (2) and which is constructed like a composite material from a cellulose base with synthetic fibers and filler, and from a porous friction layer (12) which is fastened on the substrate (11,11') and is made of synthetic fibers, preferably carbon, which are bonded with a thermoset resin.

Abstract: In a synchronizing device for transmission assemblies, a gear shaft includes a detent mounted thereon in a twist-proof manner and at least one speed wheel cooperating with the detent and rotatable on the gear shaft by movement of a sliding sleeve. A clutch is connected in a shape-locking manner to the speed wheel and a synchronizing ring enabling engagable and disengagable friction coupling of the clutch with the detent. The synchronizing ring including a conically-shaped coupling surface and the friction coupling including a friction ring body subassembly with a conical friction surface having a sintered-on friction lining and cams, and is connected in a shape-locking manner by the cams to the clutch and interacts by means of the friction lining with the conical coupling surface.

Abstract: A copper powder-free friction material which is made by sintering and intended for friction surfaces of couplings or brakes contains powdery and/or granular metallic and non-metallic components, at least 50% by weight of the non-ferrous heavy metal component being brass powder.

Abstract: A friction ring for clutches and brakes consists of an annular metal element having at least one cylindrical or conical friction surface comprising a spray-sintered friction lining. The friction linings are directly sintered onto the annular element itself, the intially planar friction surfaces being formed, after applying the spray-sintered friction linings, into cylindrical or conical shape by a non-cutting shaping process such as stamping, deepdrawing or the like. The method of producing the friction ring comprises producing an annular metal element, applying a spray-sintered friction lining on to one or both sides thereof and shaping the annular element together with the sintered linings applied thereto into a cylindrical or conical form. The shaping is performed by means of a shaping tool comprising a die and an associated plunger working on the annular element.

Abstract: Sintered friction laminae are produced by scattering metal powder on a steel substrate and then sintering the powder/substrate article in a furnace with free nitrogen in the furnace atmosphere, which atmosphere is continually renewed. The nitrogen is produced by decomposition of ammonia and diffuses into the steel substrate to harden the steel.

Abstract: A closing plate for a ring valve, in particular a suction or pressure valve of a piston compressor, which is intended to be arranged on a valve seat with arcuate-shaped through-flow passages and comprises at least one concentric ring and at least one concentric sectioned ring which control the through-flow passages, and at least one concentric ring and at least one concentric sectioned ring are connected with each other through radial arms. One of the rings is continuous and adapted to be clamped on the valve seat at at least two points, while at least one other ring is split by radial slits between the radial arms to form the at least one concentric sectioned ring.