Abstract: A friction part for a frictionally acting device comprising an annular friction surface which has an inner edge and an outer edge, with the friction surface having provided in it an encircling first groove which extends in zig-zag or undulating form between radially inner and radially outer deflection points, a plurality of second grooves which extend from the inner edge to the outer deflection points and a plurality of third grooves which extend from the outer edge into the encircling first groove and which open into the encircling first groove at opening-in points between the deflection points.

Abstract: A friction part for a frictionally acting device comprising an annular friction surface which has an inner edge and an outer edge, with the friction surface having provided in it an encircling first groove which extends in zig-zag or undulating form between radially inner and radially outer deflection points, a plurality of second grooves which extend from the inner edge to the outer deflection points and a plurality of third grooves which extend from the outer edge into the encircling first groove and which open into the encircling first groove at opening-in points between the deflection points.

Abstract: Disk (1, 11) for a force transmitting aggregate, in particular for wet disk clutch, with a core plate (2, 12) exhibiting a front side (V) and a backside (R), wherein the front side (V) and/or the backside (R) exhibits a friction lining (3v, 3r, 13v) which may be provided with grooves (4a, 4b, 5a, 5b, 5c, 14a, 14b, 15a, 15b, 15c). In accordance with the invention, in the case of a friction lining with an essentially planar surface (O3v, O3r, O13v) at least one surface area (6) is provided which is raised in comparison to this planar surface (O3v, O3r, O13v) and exhibits a spring characteristic. Alternatively thereto, it is envisioned in accordance with the invention that the cross-sectional area of the lining increases or decreases in the radial direction.

Abstract: A segmented friction lining of a friction plate for a brake; or clutch having a lock mechanism on one end and a lock counter-mechanism complementary to the lock mechanism on the other end. To ensure that the stress on the respective junction points is relieved along the connecting edges, one or several holes are built into the friction lining in the vicinity of the lock. The holes can be milled into the lining (33).

Abstract: A plate (1) for a multiple-plate clutch has at least one friction surface (4) for transmitting a torque, in particular for a wet-running switchable multiple disk clutch. The plate (1) has at least one friction surface (4) which has grooves (7.1, 7.2, 10.1, 10.2) with an inside bordering edge (6) and an outside bordering edge (5), and at least one groove (7.1, 7.2, 10.1, 10.2) that runs from the inside bordering edge (6) to the outside bordering edge (5). The at least one groove (7.1, 7.2, 10.1, 10.2) has at least one bending point (8.1, 8.2, 9.1, 9.2, 11.1, 11.2, 12.1, 12.2) at which the at least one groove (7.1, 7.2, 10.1, 10.2) is bent at an angle (?1, ?2, ?3, ?4).

Abstract: The invention relates to friction-lining segments (33.1, 33.2) for a segmented friction lining (33) of a friction plate (e.g. a disc) for a brake, clutch or the like. According to the state of the art, these types of friction-lining segments (33.1, 33.2) usually demonstrate a lock mechanism (34.1) on one end and a lock counter-mechanism (35.2) complementary to the lock mechanism on the other end. The friction lining (33) of a friction plate may thus be built out of a plurality of these types of friction-lining segments (33.1, 33.2), which are usually designed identically and engage each other in a type of gearing. To ensure that the stress on the respective junction points (locks 36.1) is relieved along the connecting edges, it is provided according to invention that one or several holes (38.1a . . . ) be built into the friction lining (33) in the vicinity (37.1) of the lock (36.1). This will significantly increase the wear resistance of this type of segmented friction lining (33).

Abstract: Disk (1, 11) for a force transmitting aggregate, in particular for wet disk clutch, with a core plate (2, 12) exhibiting a front side (V) and a backside (R), wherein the front side (V) and/or the backside (R) exhibits a friction lining (3v, 3r, 13v) which may be provided with grooves (4a, 4b, 5a, 5b, 5c, 14a, 14b, 15a, 15b, 15c). In accordance with the invention, in the case of a friction lining with an essentially planar surface (O3v, O3r, O13v) at least one surface area (6) is provided which is raised in comparison to this planar surface (O3v, O3r, O13v) and exhibits a spring characteristic. Alternatively thereto, it is envisioned in accordance with the invention that the cross-sectional area of the lining increases or decreases in the radial direction.

Abstract: A plate (1) for a multiple-plate clutch has at least one friction surface (4) for transmitting a torque, in particular for a wet-running switchable multiple disk clutch. The plate (1) has at least one friction surface (4) which has grooves (7.1, 7.2, 10.1, 10.2) with an inside bordering edge (6) and an outside bordering edge (5), and at least one groove (7.1, 7.2, 10.1, 10.2) that runs from the inside bordering edge (6) to the outside bordering edge (5). The at least one groove (7.1, 7.2, 10.1, 10.2) has at least one bending point (8.1, 8.2, 9.1, 9.2, 11.1, 11.2, 12.1, 12.2) at which the at least one groove (7.1, 7.2, 10.1, 10.2) is bent at an angle (&agr;1, &agr;2, &agr;3, &agr;4).

Abstract: A synchronizing ring (1) adapted for use in a gear clutch where the ring includes an annular body (2) formed of a chip-free material, such as a metallic body of forged or sintered material or a plastic, and having a generally conical friction surface (6) with a fibrous friction lining (3) cemented thereto. The ring has one or more generally axially extending grooves (5) formed in the friction material to provide for draining of oil during operation of the ring.