A friction device has a carrier element and friction lining segments arranged thereon. The friction lining segments each include a sintered friction lining, which is arranged on a friction lining carrier, the friction lining carrier is connected to the carrier element, and preferably the carrier element includes multiple fastening lugs and/or lining spring elements for the friction lining segments. In the design of the carrier element with the fastening lugs and/or lining spring elements, the friction lining segments each connect two fastening lugs or two lining spring elements to one another and/or the friction lining segments have an angle coverage between 25° and 55°.

The wet friction member 1 of the invention includes a core plate 2 formed in a flat ring shape, a friction part 3 arranged in a ring shape. The friction part 3 has segment pieces including rectangular shaped G.sub.1 to G.sub.4: G.sub.1 in which a lower right corner of rectangular piece is notched; G.sub.2 in which an upper left corner of rectangular piece is notched; G.sub.3 in which an upper right corner of rectangular piece is notched; G.sub.4 in which a lower left corner of rectangular piece is notched. The friction part 3 has arrangements T.sub.1 and T.sub.2: T.sub.1 in which G.sub.1 and G.sub.2 are arranged in a manner a right side of G.sub.1 and a left side of G.sub.2 face each other; T.sub.2 in which G.sub.3 and G.sub.4 are arranged in a manner a right side of the G.sub.3 and a left side of G.sub.4 face each other.

Provided are a wet friction plate and a wet multiplate clutch device capable of reduction drag torque while suppressing a decrease in the area of a friction member. A wet multiplate clutch device 100 includes wet friction plates 110 at positions facing clutch plates 103 rotatably driven by rotary drive force of an engine. The wet friction plate 110 includes multiple friction members 112 through oil grooves 115 on a flat plate annular core metal 111. The friction member 112 has first fine grooves 113 opening at an inner peripheral edge 112a of the friction member 112 and extending to an outer peripheral edge side 112b and second fine grooves 114 opening at an outer peripheral edge 112b of the friction member 112 and extending to an inner peripheral edge side 112a. The first fine groove 113 and the second fine groove 114 are formed to have a groove width of equal to or greater than 0.1 mm and equal to or less than 0.8 mm, and overlap portions 113c, 114c overlapping with each other in a circumferential direction at the same position in a radial direction of the core metal.

A clutch assembly may have an axially slidable first plate, an axially fixed second plate disposed opposite the first plate, and a clutch pack arranged between the first plate and the second plate. The clutch pack may have a number of axially slidable consecutively arranged friction plates and separator plates. The assembly may also have an actuator axially movable between a first position and a second position, where, in the first position, the clutch pack is opened and, in the second position, the clutch pack is closed and the friction plates are frictionally engaged. The assembly may also have a return spring configured to bias the actuator in a direction away from the clutch pack towards the first position. The assembly may also have an engagement spring element configured to exert an elastic force on the clutch pack.

Disclosed is a friction set for a railway disk brake system for railway rolling stock including: a shoe holder including a receiving slideway; a friction shoe including a brake pad and a profiled shape configured for being slid into the receiving slideway, where the friction shoe includes a pneumatic conduit connecting a first space delimited by a first surface of the friction shoe to a second space delimited by a second opposite surface the friction shoe; a through hole arranged in the shoe holder and laid out so as to be facing the pneumatic conduit; and a pneumatic connector mounted on the shoe holder, pneumatically connected with the through hole, extending away from the friction shoe and rotationally mobile relative to the shoe holder, around an axis perpendicular to a main plane of the shoe holder.

The present invention relates to a disk clutch comprising a first disk set (32) which is connected rotationally fixed to a first disk carrier (18) and a second disk set (42) which is connected rotationally fixed to a second disk carrier (24), wherein the disks (34 through 40, 46 through 52) of the two disk sets (32, 42) may be brought into frictional engagement with one another via friction surfaces (54, 56), wherein recesses and/or grooves are provided in at least one or more friction surfaces (54, 56) of the disks (34 through 40; 46 through 52) of the first and/or second disk sets (32; 42). A first type of recesses and/or grooves (68) is thereby provided, which is generated by a material shaping and/or a material casting and/or a non-material removing first manufacturing method, and a second type of recesses and/or grooves (70) is provided, which is generated by a material removing second manufacturing method. In addition, the present invention relates to a disk (66) for such a disk clutch and a method for producing such a disk clutch (2) and such a disk (60).

The brake pad (10A, 10B) comprises a lining (22) made of friction material and a plate (20) supporting the lining (22). The lining (22) comprises: —a rear edge (34) located on the side where the disk (9) is able to come out of an interface with the pad (10A, 10B) when the disk (9) rotates in an direction of travel of the vehicle, and a front edge (36); —a collection groove (3) that opens into the friction face (30) and is located close to the rear edge (34). The lining (22) has a rear region (60) comprising the rear edge (34) and the collection groove (3), and a front region (62) comprising the front edge (36), the front region (62) having a chamfered portion (66) such that an area of a friction surface of the front region (62) increases when a thickness of the front region (62) decreases.

A brake disk or drum has at least one working surface which opposes a braking member such as a brake pad or shoe. A plurality of spaced, raised island formations are provided across the working surface, with channels extending between the island formations. Each raised island formation has an outer surface which contacts a brake pad or brake shoe during braking.

Provided are a wet friction plate and a wet multiplate clutch device including the wet friction plates capable of improving the performance for discharging lubricant oil adhering to surfaces of friction members. A wet friction plate includes oil grooves and friction members on a flat plate annular core metal. At a surface of a porous layer of the friction member, a friction slide surface and lubricant oil recessed portions are formed. The lubricant oil recessed portion has no sharp portion in a pointed shape, such as a corner portion, and is formed with a smooth continuous surface. The multiple lubricant oil recessed portions depressed in a recessed shape with respect to the friction slide surface are formed. In the porous layer, hollow portions are formed to have the same formation rate between a portion forming the friction slide surface and a portion forming the lubricant oil recessed portion.

A frictional part for a frictionally operating device includes friction lining pieces, which are spaced apart from one another to form an annular disc-like friction surface having grooves, and the friction lining pieces have the shape of triangles and pentagons. The pentagonal friction lining pieces may be provided with a radially inward or outward directed top and may be intrinsically symmetrical with respect to a radial. The pentagonal friction lining pieces may be oriented with the tops thereof alternating radially inward and radially outward. The triangular friction lining pieces may have the shape of acute-angled or right-angled triangles having one short and two longer sides. The triangular friction lining pieces may each have a longest side which is arranged radially inward or radially outward. The pentagonal friction lining pieces may each be arranged in the circumferential direction between four triangular friction lining pieces.