Shoe Construction Patents (Class 188/250B)
  • Patent number: 6162315
    Abstract: A friction material pad comprises a lamination of stacked sheets, each of which has a top edge forming the friction face that is generally parallel to the direction of relative rotation between the friction pad and an opposing rotary member. Each sheet is formed by a wet paper making process and has a plurality of unwoven fibers, platelets, flakes, or the like, more than half of which are oriented within 45.degree. of perpendicularity to the top edge, the sheets being bound together by a resin binder to form a lamination in which the sheet edges progress from inner to outer sheets to form the friction face of the pad, each sheet having the same blend of friction and lubricating particles, fibers and fillers in a resin matrix. Three groups of sheets are heat aged to different densities and have different friction, hardness and stiffness characteristics.
    Type: Grant
    Filed: April 30, 1999
    Date of Patent: December 19, 2000
    Assignee: Delphi Technologies, Inc.
    Inventor: Robert Anthony Lamport
  • Patent number: 6142263
    Abstract: An intermediate layer (4) of a relatively low thermal conductivity, high resistance to thermal degradation elastomeric material is interposed between a friction lining (3) and a relatively soft elastomeric layer (5), the latter being bonded to a backing plate (2).
    Type: Grant
    Filed: July 30, 1998
    Date of Patent: November 7, 2000
    Assignee: Ferodo Limited
    Inventor: Mahmoud Lotfipour
  • Patent number: 6135244
    Abstract: A plate device for supporting at least one brake pad for a vehicle disc brake, wherein a noise-preventing plate is assembled to a pad-carrying plate by a solid central boss of the supporting plate and inserted into a window of mating shape complementary of that of the noise-preventing plate.
    Type: Grant
    Filed: July 21, 1997
    Date of Patent: October 24, 2000
    Assignee: AlliedSignal Materiaux de Friction
    Inventor: Jean-Pierre Le Bris
  • Patent number: 6119827
    Abstract: A brake rotor includes a disc-shaped carrier and friction rings arranged on or on top of the carrier, so that the friction rings and carrier form a single piece construction. The carrier and friction rings are made from carbon/carbon materials and ceramic materials respectively. The carrier has a hat-shaped cross-sectional shape with a flanged outer edge and the friction rings are attached to each side of the flanged edge of the carrier. The brake rotor may be directly mounted onto the wheel flange via the carrier using bolts.
    Type: Grant
    Filed: June 12, 1998
    Date of Patent: September 19, 2000
    Assignees: DaimlerChrysler AG, SGL Carbon Composites, Inc., Hitco
    Inventors: Dino Militello, Manfred Roessler, Ruediger Lichnofsky, Tilmann Haug, Emil Naeumann, Karl-Heinz Roess, Andreas Soens, Detlef Sokolowsky, Claus-Peter Weidner
  • Patent number: 6109399
    Abstract: The present invention is directed to a brake shoe adapted for use in a braking mechanism that comprises a support member and a substantially metal free brake pad disposed on the support member. The brake pad may be composed of polymerized urethane as a major constituent thereof. More particularly, the brake pad may be composed of a mixture including urethane, a urethane reactant and a urethane curing agent. The durometer hardness of the brake pad may be between 80 and 95 on the A-scale. The support member may include a connector and a base plate, and the brake pad may be formed as an integral one-piece molded construction with the base plate being embedded in the brake pad. The brake pad may have a contact surface that is contoured so that the brake pad has varying thickness to differentially contact a moving surface.
    Type: Grant
    Filed: August 26, 1997
    Date of Patent: August 29, 2000
    Inventors: Ted G. Crawford, John F. DuVall
  • Patent number: 6105735
    Abstract: A brake device includes a shoe holder, and a brake shoe held by the shoe holder. The brake shoe has a plurality of outwardly projecting brake parts, a plurality of grooves each of which is formed between two adjacent ones of the brake parts and each of which is defined by a pair of groove walls, a plurality of flat contact faces formed on the brake parts, respectively, and spaced apart by the grooves, and a pair of buffer faces formed at two opposite ends of each of the contact faces to connect each of the contact faces to two adjacent ones of the groove walls. Each of the buffer faces extends inwardly of the corresponding one of the contact faces.
    Type: Grant
    Filed: January 28, 1999
    Date of Patent: August 22, 2000
    Inventors: Ah-Ping Lin, Jung-Hua Li
  • Patent number: 6068090
    Abstract: A brake device for a bicycle includes a mounting seat having a space and an opening that faces a bicycle wheel. A resilient member is mounted in the space. A brake piece is mounted in front of the space for braking the bicycle wheel. The brake piece is connected to the resilient member to move therewith. A connecting member includes a first end operably connected to the resilient member and a second end actuatable by a brake lever for urging the resilient member and the brake piece to brake the bicycle wheel.
    Type: Grant
    Filed: July 1, 1999
    Date of Patent: May 30, 2000
    Inventors: Jack Chen, Robert Chang
  • Patent number: 6056091
    Abstract: The present invention relates to a brake shoe for a spot-type disc brake, in particular floating-caliper brake, which includes a lining carrier plate that has on its front side a brake lining intended for application to a brake disc and, in addition, is provided with a noise-damping means. To further improve noise damping, the lining carrier plate has a noise-damping radial layer made of an appropriate material on its radial contact points towards the brake carrier and/or the brake housing. Further, the noise-damping layer is provided by a deflected portion of the damping plate.
    Type: Grant
    Filed: October 5, 1998
    Date of Patent: May 2, 2000
    Assignee: ITT Manufacturing Enterprises Inc.
    Inventors: Holger Krug, Peter Schrader, Gunther Leopold
  • Patent number: 6032767
    Abstract: In a brake jaw (5) for disc brakes with partial linings having a brake disc (1), in particular for trucks, comprising a lining support plate (2) and a brake lining (4) fastened to the lining support plate (2), it is provided that for compensation of the radially different heat distribution in the brake disc (1), a radial profiling of the frictional power induced via the brake lining (4) is performed, the profiling being opposite to the heat distribution.
    Type: Grant
    Filed: December 9, 1997
    Date of Patent: March 7, 2000
    Assignee: Textar GmbH
    Inventor: Willmut Roehling
  • Patent number: 5975255
    Abstract: A brake shoe includes two rails each having an arcuate body with prong-receiving notches defined therein, as well as anchor-receiving notches defined therein. A strut-forming anchor element extends between the two rails and has threaded ends that extend through holes defined through the rail bodies in the anchor-receiving notches. Two brake pad supporting plates are mounted on the rails and each has two prongs adjacent to each rail body in position to be received in the prong-receiving notches. Anchors are mounted on the brake pad supporting plates to be received in the anchor-receiving notches and have holes defined therethrough. The ends of the strut-forming anchor elements are received through the holes in the rails and the holes defined through the anchors and have nuts threadably attached thereto to attach the strut-forming elements to the rails. One form of the rail has the anchor-receiving notches omitted and the prong-receiving notches defined completely through the rail body.
    Type: Grant
    Filed: May 9, 1997
    Date of Patent: November 2, 1999
    Inventors: James J. Monroe, Glenn Cunningham
  • Patent number: 5971112
    Abstract: In a drum brake for a vehicle in which a pair of brake shoes 4 and 5 having an identical size are pressed against an inner face of a brake drum 1 so as to effect braking, a natural frequency of one (4) of said pair of brake shoes 4 and 5 is made different from a natural frequency of the other (5). Due to the difference in the respective natural frequencies of the right and left brake shoes 4 and 5, coupled vibrations between the brake drum 1 and the two brake shoes 4 and 5 are hard to cause, whereby it is effective in drastically reducing opportunities of generating "judder.
    Type: Grant
    Filed: July 25, 1997
    Date of Patent: October 26, 1999
    Assignee: Tokyo Buhin Kogyo Co., Ltd.
    Inventors: Norihisa Okada, Takeo Moriya
  • Patent number: 5957245
    Abstract: In order to realize a two-piston floating caliper disc brake with a wide caliper, the axially outer side of the caliper is supported by radially extending protrusions shaped on the outer brake shoe. While the two protrusions have the same depth, they differ in their width. Corresponding circular grooves within the caliper around recess openings on the opposite side of the brake cylinders, however, are identical. Therefore, a radial support of the brake caliper can be carried out by both protrusions while a tangential positioning of the caliper is limited to the wider one of the two protrusions.
    Type: Grant
    Filed: August 5, 1997
    Date of Patent: September 28, 1999
    Assignee: ITT Manufacturing Enterprises Inc.
    Inventors: Stefan U. Anger, Daniel D. Keck, Jeffrey R. Skvarce
  • Patent number: 5941349
    Abstract: An arcuate brake lining apparatus for use with an arcuate brake drum is disclosed that includes a brake shoe table having an inner edge and an outer edge. There is an outer lip on the outer edge of the brake shoe table. A gripper is detachably attached to the brake shoe table. An inner lip is provided on the gripper. There is at least one brake lining segment having a braking surface configured for engaging an arcuate brake drum. The at least one brake lining segment has an inner edge and an outer edge, the inner edge being configured for engaging the inner lip of the gripper, and the outer edge being configured for engaging the outer lip of the brake shoe table. In the method of using the arcuate brake lining apparatus, when the at least one brake lining segment is to be replaced, the gripper is removed from the brake shoe table, and the at least one brake lining segment is moved in a direction from the outer edge toward the inner edge for disengaging the outer edge from the outer lip.
    Type: Grant
    Filed: February 26, 1997
    Date of Patent: August 24, 1999
    Inventor: Walter E. Krumm, Sr.
  • Patent number: 5934418
    Abstract: A brake lining for partial-lining disk brakes, particularly of rail vehicles, wherein several friction or lining elements are provided which can be fastened to a support plate individually or in groups, in which case several support plates are arranged either directly on the lining holder of the disk brake arrangement or on a lining support which can be fastened to the lining holder. For rendering the surface pressure generated during the braking uniform, the support plates are swivellably linked to the lining support or lining holder, in the case of a group-like assignment, several (at least two) lining elements being swivellably arranged on the support plate.
    Type: Grant
    Filed: March 28, 1997
    Date of Patent: August 10, 1999
    Assignee: Knorr-Bremse System Fur Schienenfahrzeuge GmbH
    Inventor: Xaver Wirth
  • Patent number: 5896955
    Abstract: A brake shoe having a metallic support or backbone member with a brake pad formed of at least two portions, each of a separate compound or composition, with each compound pre-selected to effect a separate result for each of the pad portions. The portions are configured, arranged and dimensioned so that each (and all) pad portions have a braking surface in contact with the rim generally simultaneously. The partitioned brake pad is formed of different combinations of multi-rubber or elastomers, not a particular combination, to improve wet and dry braking with one pad or the same pad. The selection of multi-rubber or elastomers could be used to stop squealing and grabbing, while also giving the pad stopping power at the same time; or a different combination could be used in wet and dry conditions, or a combination of compounds may be utilized for different partitions for racing conditions, or the like.
    Type: Grant
    Filed: October 6, 1997
    Date of Patent: April 27, 1999
    Inventor: Richard C. Everett
  • Patent number: 5890566
    Abstract: A lining is attached on a front surface of a back plate and a protrusion for the engagement with a caliper is formed on a back surface of the back plate, and a recess is formed at a tip end of the protrusion and the cross-sectional view of the protrusion is H-shaped.
    Type: Grant
    Filed: March 19, 1997
    Date of Patent: April 6, 1999
    Assignee: Akebono Brake Industry Co., Ltd.
    Inventors: Hirokazu Yoshida, Seiya Odaka
  • Patent number: 5842546
    Abstract: A brake pad assembly is provided having a split backplate design comprising a damping layer disposed between two metal plates which are mechanically fastened together such that the plates are slightly slidable relative to each other to allow independent vibration of the two plates. The two metal plates are provided with a ratio of the thickness of the plate farther from the friction material to the plate closer to the friction material of at least 1.50. The damping layer is formed of a non-compressible, non-metal, heat-resistant material such as glass fiber cloth, mineral fiber cloth, ceramic fiber cloth, aramid fiber cloth, or graphite fiber cloth, and preferably has a low coefficient of friction. The plates are mechanically fastened together by rivets, pins or the like.
    Type: Grant
    Filed: July 3, 1996
    Date of Patent: December 1, 1998
    Assignee: Prattville Manufacturing, Inc.
    Inventor: Chandi Biswas
  • Patent number: 5836428
    Abstract: A brake shoe assembly including retainer members which aid in retaining the brake shoe lining in position on the brake shoe table. The retaining members include distal flanges which abut beveled distal edges of the brake shoe lining and a central wedge which, when tightened to the brake shoe table, forces the brake shoe lining plates outwardly and into the distal flanges, holding the brake shoe lining plates in compression between the central wedge and the distal flanges.
    Type: Grant
    Filed: April 28, 1997
    Date of Patent: November 17, 1998
    Assignee: Rome Tool & Die Co.
    Inventor: Gordon Young
  • Patent number: 5799754
    Abstract: The present invention relates to marking friction linings for drum brakes or for single-block brake pads in which the friction lining and the support member are made together by moulding a single material. According to the invention, the back of the friction lining or the back of the single-block brake pad is provided with an insert that is not oxidizable and that withstands a temperature of greater than 200.degree. C., the insert having a surface that is visible outside the lining or the pad and that is suitable for acting as a medium to carry indelible information. Advantageously, the insert is in the form of a tongue, that projects towards the top of the brake calliper.
    Type: Grant
    Filed: January 24, 1997
    Date of Patent: September 1, 1998
    Assignee: Ferodo Abex SA
    Inventors: Jean M. Kazuro, Jean-Pierre N. Caron
  • Patent number: 5794740
    Abstract: A dual type composition brake block member specifically designed for use in predetermined type brake systems. The brake block member consists of a brake surface having a predetermined configuration and a predetermined surface area. It further includes a first low friction type composition material having a predetermined friction range and extends over a first predetermined portion of the surface area of the brake surface. It further includes a second high static friction type composition material having a second predetermined friction range. The second high static friction type composition material extends over a second portion of the surface area of the brake surface.
    Type: Grant
    Filed: August 23, 1996
    Date of Patent: August 18, 1998
    Assignee: Westinghouse Air Brake Company
    Inventors: Raj Velayutha, John R. Travers
  • Patent number: 5791443
    Abstract: A brake shoe assembly for a drum brake of a vehicle is improved by the addition of a moisture-impervious coating material applied to the brake shoe, and especially the brake shoe table upon which a friction liner will be removably secured. This coating material is effectively bonded to at least the portion of the outer surface of the brake shoe table which will be covered by the friction liner before the friction liner is removably secured. The moisture-impervious coating material is substantially non-adhesively bonded to said friction liner and is preferably a cross-linkable polymeric material, especially an epoxy-based adhesive.
    Type: Grant
    Filed: April 24, 1996
    Date of Patent: August 11, 1998
    Assignee: Dana Corporation
    Inventor: Ronald T. Manz
  • Patent number: 5788027
    Abstract: A composition brake shoe is used in a railway freight vehicle for reconditioning a wheel surface of a railway freight vehicle. Such brake shoe includes a brake surface having a predetermined configuration and a predetermined surface area. The composition brake shoe consists of a first friction composition material extending over the surface area of such composition brake shoe. A second friction type composition material is formed as a discrete insert, having a predetermined shape, and is molded into the first friction composition material. Such second friction composition material initially is completely embedded within the first friction composition material. One surface of the insert is disposed facing the predetermined surface area of the brake surface of the composition brake shoe. Such one surface of the insert being incrementally exposed as the first friction composition material is eroded away due to frictional engagement with the wheel tread surface during normal braking operations.
    Type: Grant
    Filed: June 6, 1997
    Date of Patent: August 4, 1998
    Assignee: Westinghouse Air Brake Company
    Inventors: Bruce W. Shute, Joseph Formolo
  • Patent number: 5743361
    Abstract: A light-weight brake shoe for a rotary disc brake having a removable and replaceable friction pad. The brake shoe provides a thin-walled backing plate having a side wall for cooperatively engaging the friction pad. The side wall of the backing plate has a pair of raised lip portions for cooperatively engaging a complementary groove provided in the bottom wall of the friction pad. An irregularly shaped spring cooperatively engages a tapered groove provided in the top wall of the friction pad for biasing the friction pad into cooperative engagement with the side wall of the backing plate. The tapered groove of the friction pad provides a downwardly and inwardly biasing force in order that the friction pad maintains cooperative engagement with the side wall of the backing plate while also ensuring that the friction pad avoids dragging on the brake rotor of the vehicle when the brake is not activated.
    Type: Grant
    Filed: January 2, 1997
    Date of Patent: April 28, 1998
    Assignee: ITT Automotive, Inc.
    Inventor: Klaus Winter
  • Patent number: 5740891
    Abstract: A center brake for automobiles is disclosed. The brake has braking teeth (which may be triangular, trapezoidal or of other shape) formed on the outer surfaces of the brake shoes and on the inner surface of the brake drum for improved brake performance. Preferred brake drum material is cast iron and preferred brake shoe material is non-toxic to avoid health damage to those who come into contact with the brake. The mechanical structure of the preferred brake results in a system which reliably carries out its brake shoe return function even when there is a failure or malfunction of brake return springs or ice on the brake during cold weather. The preferred brake can be alternatively actuated by a switch or lever.
    Type: Grant
    Filed: November 12, 1996
    Date of Patent: April 21, 1998
    Inventor: Jae-hyou Song
  • Patent number: 5725077
    Abstract: A friction pad for a brake assembly including a backing plate having attached to it a pad of friction material containing at least 50% by weight of a ceramic material present in the form of relatively coarse particles of diameter 0.3 mm to 4 mm and a synthetic resin binder, together with a minor amount of a graphite lubricant and a minor amount of a ceramic material in the form of relatively fine particles in the size range 1 to 30 microns.
    Type: Grant
    Filed: March 6, 1996
    Date of Patent: March 10, 1998
    Assignees: Sab Wabco (Bromborough) Limited, Ferodo Limited
    Inventors: Alfred J. Taylor, Susan K. Taylor, David A. Hubbard, Mahmoud Lotfipour
  • Patent number: 5701978
    Abstract: A set of brake pads for a floating-caliper disc brake including a first brake pad with a first retaining spring for clamping engagement on a brake piston and a second brake pad with a second retaining spring for clamping engagement on an axially external leg of the floating caliper. The first retaining spring has two resilient tongues which are locked in a bore of the hollow brake piston, and the second retaining spring has identical resilient tongues which are locked in a recess of the external housing leg. According to the present invention, the distances between the respectively opposed resilient tongues are different in conformity with the different widths of the bore and the recess, respectively. The provision according to the present invention renders it impossible to attach the first brake pad to the external housing leg and the second brake pad to the brake piston.
    Type: Grant
    Filed: November 18, 1996
    Date of Patent: December 30, 1997
    Assignee: ITT Automotive Europe GmbH
    Inventors: Rolf Weiler, Wolfgang Schiel
  • Patent number: 5620062
    Abstract: A bicycle brake shoe assembly for eliminating the need for readjustment of the brake pad relative to the rim upon replacement of a pad with a like pad and having an elongate tubular stem secured with an opening in a stem clamp device of a brake lever, and an elongate brake pad. One end of the stem and an adjoining surface of the pad are provided with matingly configured portions for providing a fixed orientation of the pad relative to the stem. A bolt passes through the bore of the stem into engagement with a threaded opening in the adjoining surface to hold the parts together. In one embodiment, the parts are formed with an oval, or non-circular recess in the adjoining surface with the end portion of the stem being matingly configured. In another embodiment, the pad is provided with a generally cylindrical stub with a threaded opening, the stub having a diameter generally equal to the diameter of the stem. With the adjoining ends being V-shaped, one male and the other female.
    Type: Grant
    Filed: April 5, 1996
    Date of Patent: April 15, 1997
    Inventors: Richard C. Everett, Mark Rosenberger
  • Patent number: 5617935
    Abstract: A friction pad for a disc brake comprising a stationary pad which is fixed on a backing plate, and a rotatable pad which is rotatably attached to the backing plate, wherein the rotatable pad is rotatable along an axis which is perpendicular to the backing plate.
    Type: Grant
    Filed: August 30, 1996
    Date of Patent: April 8, 1997
    Inventors: William Chuang, King Y. K. Chuang
  • Patent number: 5607034
    Abstract: An improved brake shoe table includes the edges of the brake shoe table being bent radially inwardly relative to the remainder of the table by between 45 and 90 degrees. The bent edges increase the rigidity of the brake shoe and also reduce localized lining wear by bringing the lining into contact with a brake drum in a more uniform fashion. Moreover, the improved brake shoe design has unexpectedly decreased the operation noise associated with the use of a cam brake system.
    Type: Grant
    Filed: March 8, 1995
    Date of Patent: March 4, 1997
    Assignee: Rockwell International Corporation
    Inventors: David J. Edwards, Donn C. Knight, Jonathan L. Wemple
  • Patent number: 5595267
    Abstract: A composition type brake shoe for a railroad car in which the backing plate keybridge is filled with composition brake lining material to reinforce the keybridge. A recess formed in the braking face of the brake lining extends beyond the keybridge so that a relatively thin area of brake lining is formed between the recess and backing plate outboard of the keybridge opening, and to which thin section area cracks that may develop in the brake lining are encouraged to migrate in order to redirect backing plate flexure away from the critical keybridge area to a stronger area of the backing plate.
    Type: Grant
    Filed: June 11, 1996
    Date of Patent: January 21, 1997
    Assignee: Westinghouse Air Brake Company
    Inventor: Joseph C. Kahr
  • Patent number: 5586626
    Abstract: A brake having a brake element, such as a brake pad for engagement with the flat surface of a disc or like moving element of a brake system, has a relatively soft layer (4) of elastomeric material interposed between a layer of friction material (3) of the pad lining (1), and the backing plate (2) to which the lining (1) is secured. The elastomeric material is required to have a Rockwell value greater than 0.30 millimetre penetration. The elastomeric material may have a Rockwell value of a depth of penetration at least twice that of the friction material. Hot-spotting and thermal damage to the moving element are thus reduced, and so is wear of the lining (1) itself.
    Type: Grant
    Filed: May 31, 1995
    Date of Patent: December 24, 1996
    Assignee: Ferodo Limited and British Railways Board
    Inventors: Keith D. Dolbear, Trevor W. Beamond, Kerry G. Schofield
  • Patent number: 5582277
    Abstract: A caliper disk brake for steel mill cranes includes a pair of armatures having an electromagnetic coil and a spring interposed between them to operate in a clamshell fashion. The spring urges the armatures apart, while actuation of the coil urges the armatures together. Each of a pair of caliper arms is pivotally connected to a respective one of the armatures at one end thereof, and has a pressure plate pivotally maintained at an opposite end. The pressure plates are maintained in juxtaposition to wear pads which are axially movable in apertures maintained in a pair of stationary plates. A disk, adapted for interconnection with the shaft of a steel mill crane hoist motor is positioned between the plates and wear pads.
    Type: Grant
    Filed: February 22, 1995
    Date of Patent: December 10, 1996
    Assignee: Power Transmission Technology, Inc.
    Inventors: David C. Heidenreich, Thomas L. Richards
  • Patent number: 5566793
    Abstract: An improved railway brake shoe member characterized by longitudinally tapered sidewalls of the brake shoe that provide adaptive response to braking under conditions of mis-alignment between the brake shoe member and the tread of a railway car wheel by facilitating wear-in of the mis-aligned brake shoe, thereby assuring brake shoe/wheel tread engagement and accordingly alleviating degradation of braking efficiency and undesirable thermal inputs to the wheel flange that otherwise results from such brake shoe mis-alignment.
    Type: Grant
    Filed: February 1, 1993
    Date of Patent: October 22, 1996
    Assignee: Westinghouse Air Brake Company
    Inventor: Joseph C. Kahr
  • Patent number: 5555959
    Abstract: A brake shoe having a metallic support or backbone member with a brake pad formed of at least two portions, each of a separate compound or composition, with each compound pre-selected to effect a separate result for each of the pad portions. The portions are configured, arranged and dimensioned so that each (and all) pad portions have a braking surface in contact with the rim generally simultaneously. The partitioned brake pad is formed of different combinations of multi-rubber or elastomers, not a particular combination, to improve wet and dry braking with one pad or the same pad. The selection of multi-rubber or elastomers could be used to stop squealing and grabbing, while also giving the pad stopping power at the same time; or a different combination could be used in wet and dry conditions, or a combination of compounds may be utilized for different partitions for racing conditions, or the like.
    Type: Grant
    Filed: January 18, 1995
    Date of Patent: September 17, 1996
    Inventor: Richard C. Everett
  • Patent number: 5551534
    Abstract: A pressure balanced brake disc stack provides brake discs of greater thickness at the ends and center of the stack and of a lesser thickness at the areas in between the centrally disposed disc and the discs at the end of the stack. The increased thickness of the discs at the end of the stack prevent deflection or distortion of those discs to more evenly distribute the braking pressure applied thereto throughout the stack so as to provide a higher braking coefficient. Additionally, the unique configuration of the brake stack allows for effective heat dissipation at the discs adjacent to the end discs of the stack.
    Type: Grant
    Filed: June 5, 1995
    Date of Patent: September 3, 1996
    Assignee: Aircraft Braking Systems Corp.
    Inventors: Joe E. Smithberger, Thomas E. Nemcheck, Kamran Z. Moradi, John M. Hall
  • Patent number: 5538104
    Abstract: A brake pad assembly comprises a backplate, a friction lining secured to one side of the backplate and a planar dampening sheet secured to the other side of the backplate. The dampening sheet has at least one embossed projection extending from the one side thereof and the backplate has at least one recess in the side thereof secured to the dampening sheet and which is of generally the same configuration as the projection in the dampening sheet to receive the projection. The projection is partially outlined by at least one cut in the dampening sheet forming a cut edge on the projection which extends outside the plane of the dampening sheet to abut against the wall of the recess and compensate for excessive shearing forces caused between the dampening sheet and the backplate during a braking operation utilizing the brake pad assembly.
    Type: Grant
    Filed: December 20, 1995
    Date of Patent: July 23, 1996
    Assignee: Eagle-Picher Industries GmbH
    Inventors: Matthias Katz, Friedrich Beck, Hans-Herbert Noack
  • Patent number: 5538108
    Abstract: It is proposed to mount single, cylindrical or polyhedron sintered friction elements (1) at the cantilevered ends of resilient metal plates (2); the metal plates are attached to a base platen (3) in such a way that each end of the plates acts as an independently movable bracket adapted to absorb any deformation induced by thermal forces, thereby enabling a uniform contact pressure to be exerted between the single friction elements and the brake disc.
    Type: Grant
    Filed: March 25, 1994
    Date of Patent: July 23, 1996
    Assignee: Frendo S.p.A.
    Inventor: Sergio Russo
  • Patent number: 5535858
    Abstract: A brake friction pad assembly is provided with a metallic backing plate element, a friction pad element having a mating surface, an air-dried and completely thermally cured elastomeric adhesive material film joined in cure-bonded relation to the mating surface of the friction pad element, and mechanical fasteners joining the friction pad element and adhered elastomeric adhesive material film to the backing plate element with the elastomeric adhesive material film in an intermediate position.
    Type: Grant
    Filed: June 26, 1995
    Date of Patent: July 16, 1996
    Assignee: Wagner Electric Corporation
    Inventors: Alan R. Hummel, John P. Kwolek
  • Patent number: 5535859
    Abstract: A friction material for a brake pad is disclosed which is used in a brake system to attenuate noise generated during a brake application. The friction material has double chamfers on its leading and trailing edges which extend from an engaging surface. Each of the double chamfers has a first surface area located in a first plane and a second surface area located in a second plane with respect to the engaging surface. The first surface area and the second surface area intersect to define an engagement contact edge where the friction material initially engages a rotating member such that path through which frequencies generated during a brake application are changed resulting in an acceptable noise level during a brake application.
    Type: Grant
    Filed: August 4, 1995
    Date of Patent: July 16, 1996
    Assignee: AlliedSignal Inc.
    Inventor: Li J. Zeng
  • Patent number: 5535860
    Abstract: A brake friction pad assembly is provided with a metallic backing plate element, a friction pad element having a mating surface, an air-dried and thermally cured elastomeric adhesive material film joined in cure-bonded relation to the mating surface of the friction pad element, and mechanical fasteners joining the friction pad element and adhered elastomeric adhesive material film to the backing plate element with the elastomeric adhesive material film in an intermediate position.
    Type: Grant
    Filed: August 14, 1995
    Date of Patent: July 16, 1996
    Assignee: Wagner Electric Corporation
    Inventors: Alan R. Hummel, John P. Kwolek
  • Patent number: 5515950
    Abstract: An improved disc brake friction pad assembly is provided with a metallic backing plate element, a friction pad element, and a noise-dampening shim subassembly positioned intermediate the backing plate element and the friction pad element.
    Type: Grant
    Filed: June 8, 1994
    Date of Patent: May 14, 1996
    Assignee: Pneumo Abex Corporation
    Inventor: John P. Kwolek
  • Patent number: 5509507
    Abstract: A multi-disc brake suitable for an aircraft has a stack of rotor and stator discs in which the discs of a set at one end of the stack each have a greater allowance for wear than the discs of a set at the other end of the stack whereby the group of discs are removed together from one end of the stack as a fully worn group at a brake servicing operation. An unworn group of discs is added to the other end of the stack.
    Type: Grant
    Filed: May 17, 1994
    Date of Patent: April 23, 1996
    Assignee: Dunlop Limited a British Company
    Inventors: Trevor C. Wells, Anthony J. Waring
  • Patent number: 5503256
    Abstract: A brake shoe assembly is formed by precision stamping a net shaped web blank having a series of tabs projecting outward therefrom and stamping a corresponding table member provided with tab receiving apertures and bending the table member into a semi-cylindrical segment. The web blank and the table are assembled causing the web tabs and table apertures to be interlocked securely locating the parts temporarily prior to the cooperating tabs and apertures being permanently joined together without any portion thereof extending substantially beyond the outer semi-cylindrical surface of the table.
    Type: Grant
    Filed: August 22, 1994
    Date of Patent: April 2, 1996
    Assignee: Eaton Corporation
    Inventors: Chrisopher A. Redgrave, Michael L. Silvasi, Dominic Licavoli
  • Patent number: 5503257
    Abstract: A brake shoe for an elevator safety device comprising a supporting body provided on a vertically moving body and having a front surface thereof facing a guide rail for being pressed toward the guide rail in the event of an emergency stop; the front surface having a plurality of bottomed holes provided therein; and a plurality of ceramic braking members disposed in the holes of the supporting body and each having a top portion thereof protruding from the front surface of the supporting body and each having an outer size smaller than a complementary size of each the hole. In the brake shoe, deformation, fusion, etc. on braking surfaces and breakage of the braking surfaces due to shocks during operation can be prevented, thereby achieving an improvement in safety and reliability. Further, an elevator speed can be increased and a device size can be reduced.
    Type: Grant
    Filed: July 29, 1994
    Date of Patent: April 2, 1996
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Kazuhiko Sugita, Kazumasa Ito
  • Patent number: 5499705
    Abstract: A friction pad for use in a friction element used in a friction engagement device such as a brake or clutch, The friction element includes a carrier and a plurality of friction pads circumferentially spaced about the carrier, The pads may have a modular construction whereby pad portions are releasably secured to support portions. The pads may also be releasably secured to the carrier. Various friction pad constructions are contemplated including constructions in which the secondary support portion includes a membrane and the primary support portion includes a cylindrical member extending between the membrane and the friction pads. A continuous friction pad ring may be substituted for the discrete friction pads, The carrier may be provided with locator pins in the pad receiving bores to orient the pads properly. The carrier may have cuts and grooves formed therein to provide a flexible or even beam mounted support for the friction pads.
    Type: Grant
    Filed: November 23, 1994
    Date of Patent: March 19, 1996
    Inventor: Russell D. Ide
  • Patent number: 5494140
    Abstract: A brake shoe for spot-type disc brakes. The novel brake shoe incorporates a retaining spring which is fixed to the brake shoe's backplate and which is intended to engage a hollow portion of a brake piston. Preferably the backplate is coated with a silencing varnish paint for noise abatement. A fixing section of the retaining spring is formed with a step which is in abutment against the backplate in a range devoid of silencing varnish paint. The retaining spring is secured to safeguard against twisting. The operability of the retaining spring is preserved, independently of the accidental thickness of the layer of silencing varnish paint.
    Type: Grant
    Filed: January 26, 1995
    Date of Patent: February 27, 1996
    Assignee: Alfred Teves GmbH
    Inventors: Rolf Weiler, Dieter Bieraugel, Uwe Bach
  • Patent number: 5477944
    Abstract: A disc brake caliper has two limbs which, in use, straddle an outer periphery of a brake disc to support friction pads on each side of the disc. Each caliper limb supports at least two friction pads arranged side by side in a circumferentially sequential array with the trailing edges of each pad abutting the leading edge of any circumferentially adjacent pad in the array to transmit torque loads from one pad to the adjacent pad.
    Type: Grant
    Filed: May 5, 1994
    Date of Patent: December 26, 1995
    Assignee: Automotive Products, plc
    Inventors: Stephen Bryan, Robert Tyler
  • Patent number: 5474159
    Abstract: In the case of a friction lining, intended in particular for brake systems and comprising a friction element consisting of asbestos-free friction lining material and an abrasive element consisting of abrasive material with a thermosetting binder on the basis of natural or synthetic resin, it is provided that an abrasive element is incorporated in the friction element which, as wear of the friction lining advances, enables the frictional properties of the surface which presses against the lining to be regenerated at intervals.
    Type: Grant
    Filed: February 4, 1994
    Date of Patent: December 12, 1995
    Assignee: Textar GmbH
    Inventors: Hartmut Soennecken, Wolf Savary
  • Patent number: 5469942
    Abstract: Arcuate brake lining apparatus for use with an arcuate brake drum includes a brake shoe table having an inner edge and an outer edge. There is an outer lip on the outer edge of the brake shoe table. A gripper is detachably attached to the brake shoe table. An inner lip is provided on the gripper. There is at least one brake lining segment having a braking surface configured for engaging an arcuate brake drum. The at least one brake lining segment has an inner edge and an outer edge, the inner edge being configured for engaging the inner lip of the gripper, and the outer edge being configured for engaging the outer lip of the brake shoe table. In the method of using the arcuate brake lining apparatus, when the at least one brake lining segment is to be replaced, the gripper is removed from the brake shoe table, and the at least one brake lining segment is moved in a direction from the outer edge toward the inner edge for disengaging the outer edge from the outer lip.
    Type: Grant
    Filed: August 26, 1994
    Date of Patent: November 28, 1995
    Inventor: Walter E. Krumm, Sr.
  • Patent number: 5440796
    Abstract: The invention is directed to a method for manufacturing a brake shoe particularly for drum brakes of motor vehicles, having a carrier of the brake lining whose outside surface has the shape of a circular cylindrical section, and having an arcuate or sickle-shaped web arranged radially inwardly of the carrier of the brake lining and by which the actuation forces of the brake are transmitted onto the carrier of the brake lining. The new manufacturing method provides that a ring having a cylindrical outside surface and a T-shaped cross section is shaped from a blank by buckling and subsequent flattening or by cleaving and subsequent flattening. The ring is divided into two or more ring segments each of which forms a brake shoe.
    Type: Grant
    Filed: April 9, 1993
    Date of Patent: August 15, 1995
    Assignee: Dieter Kirschdorf
    Inventors: Wolf-Dieter Deggau, Dieter Kirschdorf