| Brake shoe -> Monitor Keywords |
|
|
  Brake shoeUSPTO Application #: 20070240949Title: Brake shoe Abstract: In a brake shoe (1) comprising a carrier plate (2) having arranged thereon first a dampening and noise-reducing intermediate layer (4) and then a friction lining (6), it is provided that the intermediate layer (4), on the side thereof facing towards the friction lining (6), comprises a three-dimensional surface structure, and that the friction lining (6) on the carrier-plate side is adapted to the surface contour (5) of the intermediate layer (4). (end of abstract) Agent: Diller, Ramik & Wight - Annandale, VA, US Inventors: Gerhard Kurz, Wilfried Schnell, Georg Eichner, Wolfgang Hoffrichter USPTO Applicaton #: 20070240949 - Class: 18825100R (USPTO) The Patent Description & Claims data below is from USPTO Patent Application 20070240949. Brief Patent Description - Full Patent Description - Patent Application Claims
CROSS-REFERENCE TO RELATED APPLICATIONS [0001] This application is a divisional application of U.S. application Ser. No. 10/332,529 filed on Jul. 2, 2003 and now U.S. Pat. No. ______. BACKGROUND OF THE INVENTION [0002] The invention relates to a brake shoe. [0003] It is already known to arrange a dampening intermediate layer between a carrier plate and a friction lining. This intermediate layer has a uniform layer thickness of 3 mm, for instance. This intermediate layer is useful, e.g., for bonding the friction lining to the carrier plate with high strength. [0004] In known brake linings, undesired accompanying phenomena will occur during braking, depending on the wear condition of the brake shoe. With increased wear, for instance, brake shoes are known to contribute to a heightened generation of brake noises because the friction linings tend to become harder and lose compressibility with increased service life and thermal stress. For this reason, the friction linings will become less capable to adapt to the brake disks which undergo geometric changes (e.g. shield formation) under the influence of heat. [0005] The generated noises can be characterized as follows: [0006] crumpling (broad-band noise: 200 Hz to 8 kHz) [0007] squeaking (1500 Hz to 15 kHz) [0008] juddering (20 Hz to 100 Hz) [0009] humming (200 Hz to 600 Hz), and [0010] wire-brush noises. [0011] Juddering effects such as vibrations of the steering wheel and pulsation of the brake pedal, as well as humming, can increase along with the progression of the wear condition. SUMMARY OF THE INVENTION [0012] It is an object of the invention to provide a brake shoe which makes it possible to keep the development of noise and the transmission of vibrations onto the steering wheel or the brake pedal continuously low throughout the lifespan of the brake shoes. [0013] According to the invention, it is advantageously provided that the intermediate layer, on the side thereof facing towards the friction lining, comprises a three-dimensional surface structure, and that the friction lining on the side of the carrier plate is adapted to the surface contour of the intermediate layer. The intermediate layer is provided to exert a favorable influence on the stiffness of the brake lining in the radial direction and the tangential direction of the brake lining relative to the brake disk by influencing the compressibility and the dampening of the brake lining. In this manner, brake noises and the transmission of vibrations onto the steering wheel and the brake pedal can be reduced to a minimum. [0014] A further objective resides in influencing the compressibility and thus the surface pressure in the axial direction. The influencing of the compressibility results in a high dampening of humming, squeaking and crumpling noises. [0015] Preferably, the friction lining is soft and elastic in the tangential direction. Thereby, the tendency towards juddering can be reduced so that noises, rotational vibrations of the steering wheel and pulsation of the pedal will be decreased. In this arrangement, the friction lining can be relatively stiff in the radial direction. [0016] The three-dimensional surface structure of the intermediate layer also influences the effective friction radius and the heat intake into the brake disk while the lining can optimally adapt to the geometric changes of the brake disk. [0017] It is provided that the intermediate layer comprises a material which is soft relative to the friction lining and is highly dampening. By means of the three-dimensional surface structure, it is made possible to adjust the stiffness and dampening properties within wide ranges without changing the friction material. In this manner, also the friction behavior and the wear can be favorably influenced. [0018] In a preferred embodiment, it is provided that the surface structure of the intermediate layer facing towards the friction lining comprises projections extending into the friction lining. [0019] According to one embodiment, it can be provided that the projections extend into the surface of the friction lining. [0020] The projections can have a bar-shaped, conical or sinusoidal cross-sectional shape. [0021] Alternatively, the projections can have a cylindrical shape. The three-dimensional surface structure of the intermediate layer can be oriented symmetrically relative to a radial axis of symmetry of the carrier plate. This radial axis of symmetry is related to the rotational axis of the wheel and the brake disk, respectively. Continue reading... Full patent description for Brake shoe Brief Patent Description - Full Patent Description - Patent Application Claims Click on the above for other options relating to this Brake shoe patent application. ###  How KEYWORD MONITOR works... a FREE service from FreshPatents1. Sign up (takes 30 seconds). 2. Fill in the keywords to be monitored. 3. Each week you receive an email with patent applications related to your keywords. Start now! - Receive info on patent apps like Brake shoe or other areas of interest. ### Previous Patent Application: Bicycle disk brake pad with titanium fiber friction material Next Patent Application: Setting device, particularly a motor vehicle parking brake Industry Class: Brakes ### FreshPatents.com Support Thank you for viewing the Brake shoe patent info. IP-related news and info Results in 2.35006 seconds Other interesting Feshpatents.com categories: Accenture , Agouron Pharmaceuticals , Amgen , AT&T , Bausch & Lomb , Callaway Golf |
||
