Described is a brake disc comprising: an annular monolithic band (1) having a thickness (S) forming two flat parallel surfaces (2, 3) defining the contact zones with friction members for the brake and delimited by an outer edge (4) and an inner edge (5); the annular band (1) having the inner edge (5) equipped with a plurality of protrusions or ribs (6) having preferably radial directions;an element (7) for supporting the annular band (1) joined to the protrusions or ribs (6) of the inner edge (5) of the annular band (1); the supporting element (7) being configured to be keyed centrally to the hub of a rotary element; the brake disc (100) at least one contact surface (2, 3) of the annular band (1) equipped with a first plurality of recesses (9) made at least along the outer edge (4) of the annular band (1); each first recess (9) being configured so as to define, in the area involved, a reduction of the thickness (S) of the annular band (1) comprising at least one stretch of the outer edge (4) of the annular band (1) on the corresponding contact surface (2, 3).

A brake pad for a disc brake with decreased wear characteristics is provided. The brake pad is configured with the distribution of brake pad friction material weighted toward the radially outer region of the brake pad, with the lateral sides of the pad material being generally aligned with radial lines originating at the rotation axis of the brake disc of the disc brake. The brake pad friction material distribution results in decreased brake application pressure between the brake pad and the brake disc while obtaining the same braking force provided by a comparable generally rectangular brake pad, resulting in lower brake pad wear at the same braking force levels.

A brake pad for a disc brake with decreased wear characteristics is provided. The brake pad is configured with the distribution of brake pad friction material weighted toward the radially outer region of the brake pad, with the lateral sides of the pad material being generally aligned with radial lines originating at the rotation axis of the brake disc of the disc brake. The brake pad friction material distribution results in decreased brake application pressure between the brake pad and the brake disc while obtaining the same braking force provided by a comparable generally rectangular brake pad, resulting in lower brake pad wear at the same braking force levels.

In one aspect, a sprinkler is provided having a nozzle, a deflector that receives fluid flow from the nozzle, and a friction brake assembly that controls rotation of a deflector. The friction brake assembly is releasably connected to the frame in order to enhance serviceability of the sprinkler. In another aspect, a sprinkler is provided having a frame, a deflector rotatably connected to the frame, a nozzle, and a nozzle socket of the frame. The nozzle and nozzle socket have interlocking portions that releasably connect the nozzle to the frame. The nozzle may be easily removed for servicing. Further, the nozzle socket can be configured to receive a plurality of nozzles having different flow characteristics. A nozzle can be selected and utilized with the sprinkler according to the desired application for the sprinkler.

A brake pad for a motor vehicle is provided. The brake pad includes a body having upper and lower edges and a friction surface extending between the upper and lower edges for engaging a rotor. A notch is located along a section of the upper edge of the brake pad. The notch has an arc length of about to about of an arc length of the pad and a depth of about to about of a height of the pad. During engagement with the rotor, the notch is configured to reduce squeal noise caused by tangential modes of the rotor.

A friction brake device has a brake rotor which rotates around a rotation axis, brake pads as rotating friction members which rotate around an autorotation axis parallel to the rotation axis, rotational torque transmission devices which mutually transmit rotational torques between the brake rotor and the brake pads without depending on the friction force between the brake rotor and the brake pads, and pressing devices which press the brake pads against the brake rotor. The pressing devices press the brake pads against the brake rotor by way of non-rotating friction members which are supported so as not to rotate around the autorotation axis.

A disc brake pad comprises a base plate, a friction pad, a first fin, and a second fin. The base plate includes a first surface. The friction pad is provided on the first surface. The first fin extends along a first edge of the base plate. The first fin includes a first fin end and protrudes from the base plate to the first fin end in a first direction. The first fin has a first distance defined between the first surface and the first fin end in the first direction. The second fin includes a second fin end and protrudes from the base plate to the second fin end in the first direction. The second fin has a second distance defined between the first surface and the second fin end in the first direction. The second distance is longer than the first distance.