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1800 results about "Disc brake" patented technology

A disc brake is a type of brake that uses calipers to squeeze pairs of pads against a disc or "rotor" to create friction. This action slows the rotation of a shaft, such as a vehicle axle, either to reduce its rotational speed or to hold it stationary. The energy of motion is converted into waste heat which must be dispersed.

Brake condition monitoring

InactiveUS7086503B2Less-rapid decelerationBrake fluid pressure increaseFinanceAircraft braking arrangementsRelative motionBraking system
System and method for monitoring the applications of the brakes, e.g. of an aircraft to determine brake condition and operate a brake maintenance programme or charge a brake system user. It is desirable to have accurate information for determining the condition and predicting the life of carbon-carbon brake discs. This is important for safety as well as commercial reasons. The number of landings of an aircraft is often used as a determinant for such as lifetime warranties for brake discs and recommended maintenance periods. However, at least for carbon disc brakes, this may not be entirely accurate. For example such brake discs also wear during taxiing. The system and method herein includes monitoring each actuation of the brakes and making a separate record of each actuation of the brakes in which there is relative movement of the facing friction surfaces that cause wear, and from that separate record determining brake usage. The monitoring may include measuring changes and processing the signals to distinguish between those which fall below and those which are above a threshold value. Herein there is also described, a method and apparatus for monitoring a braking system comprising sensing a plurality of braking parameters having values dependent upon wear in the system and different faults of the system, and identifying and recording wear and faults based on combinations of values of said parameters.

Caliper assembly for disc brake system

A caliper assembly comprising: a brake pad comprising a carrier plate having two opposing faces and a top edge a bottom edge and two opposing side edges, wherein on one face is friction material and on the opposing face is a projection adapted to seat in a matched hole or recess in a caliper body, the two opposing side edges each having an ear which is adapted to seat in pad locator indentations in a support structure; a support structure comprising a recess for housing at least one brake pad and at least two pad locator indentations adapted for receiving the ears located on the two opposing sides of the brake pad and at least two caliper body locator indentations for seating two ears defined by the caliper body; and a caliper body having a hole or recess adapted for seating the projection on the opposing face of the brake pad and having two ears on each opposing side which are adapted to seat in the caliper body locator indentations of the support structure; wherein the ears of the brake pad are seated in the pad locator indentations of the support structure, the projection on the opposing face of the brake pad is seated in the hole or recess located in the caliper body, and a clip which engages the opposing face of the brake pad and the caliper body and holds the brake pad in position with respect to the caliper body and the ears of the caliper body are seated in the caliper body locator indentations in the support structure.

Melt-infiltrated pitch-pan preforms

InactiveUS20030180538A1Omission of costly CVD stepGood adhesionBraking discsCeramic layered productsPorosityCarbon fibers
Carbon-silicon carbide brake preforms are manufactured by carbonizing a blend of carbon (e.g., polyacrylonitrile) fibers and thermosetting pitch resin, optionally along with a lubricant such as graphite, to provide an intermediate product having open porosity and subsequently filling the pores of the intermediate product with silicon by a melt infiltration process. Molded articles that consist principally of carbon, that have relatively high strength and resistance to decomposition by frictional heat, and that are suitable for melt infiltration with silicon, are produced by, e.g.: coating randomly oriented polyacrylonitrile-derived carbon fibers, optionally mixed with finely divided carbon powder, with a thermosetting blend of (a) pitch and (b) an organic medium, at an elevated temperature to form a viscous molding compound; molding the compound at a low pressure and elevated temperature so that a solid compact is obtained; stripping a molded article made of said compound from the mold; optionally heating the molded article at gradually increasing temperatures to insure complete condensation within the article; and carbonizing the condensed molded article in an inert atmosphere at gradually increasing temperatures to produce a molded C/C intermediate article suitable for melt-infiltration with silicon. The preforms may be configured in the form of a disc brake rotor or a disc brake pad.

Master cylinder lever for a hydraulic disc brake having favorable handle pivot geometry

A bicycle hydraulic disc brake master cylinder includes a housing having a bar clamp at one end configured for fastening the housing to a bicycle handle bar, the bar clamp receiving the handle bar along a clamp axis. A handle is pivotably connected to the housing to pivot about a pivot axis in operative association with a piston train to impart a drive force on the piston train. The handle defines a finger receptacle receiving at least one finger of a user defining an effective force point at a select distance from a distal end of the handle. A select ideal finger actuation path for the at least one finger of a user begins at a start point at the effective finger force point with the handle at an engagement point where the handle begins to drive the piston train against operative fluid resistance and extends along a line from the start point at a select angle relative to the clamp axis. A pivotable connection is provided between the handle and the housing and is located on the housing relative to the clamp axis so that with the handle actuated by a force applied to the effective finger force point along this select ideal actuation path, a mechanical advantage to the user resulting from the handle actuation does not diminish more than three percent as the handle is pivoted between the engagement point and a fully actuated position.

Floating type train brake pad capable of replacing friction block

The invention discloses a brake pad which is applied to a disc type brake system of a high-speed train. A friction block constituted by the brake pad can be flexibly replaced. The brake pad comprises a brake pad back plate which is made of a metal material, an elastic supporting sheet, the friction block and a circular spring clamp, wherein the elastic supporting sheet is provided with a spherical supporting surface and a central guide hole; the lower part of the friction block is provided with a spherical supporting surface and a positioning and connecting shaft which is provided with a clamping groove; the connecting shaft can penetrate through the central guide hole and a back plate positioning hole of the elastic supporting sheet and is locked on the back plate by the circular spring clamp to realize floating connection; the friction block is provided with a polygonal block with a blind hole in the center; and every three friction blocks form an interlocking group, so that the rotation of the friction block during working of the brake pad is prevented. The brake pad can achieve the maximum contact friction area of the brake pad and a brake disc in a train braking process, so that the braking process is stable and the brake pad has the functions of damping, vibration reduction, noise reduction, heat dissipation and the like. The friction block is easy to replace, so that the train operation cost is lowered.
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