Common Anchor Pivot Or Abutment Patents (Class 188/328)
  • Patent number: 8640836
    Abstract: A device for supporting brake shoes of a drum brake of a vehicle, in particular of a utility vehicle or an agricultural machine, includes a brake carrier, a brake lining carrier and a bearing body, wherein the brake lining carrier is arranged on the brake carrier so as to be swivelable across the bearing body in such a way that the brake lining carrier can be pivoted along a plane of swiveling, the inclination of the plane of swiveling to the brake carrier being variable, and wherein the bearing body has a bearing surface which is rotation-symmetrical about its bearing axis and the front faces of the bearing body have fastening portions for arranging the bearing body on the brake carrier or on the brake lining carrier.
    Type: Grant
    Filed: June 16, 2010
    Date of Patent: February 4, 2014
    Assignee: SAF-HOLLAND, GmbH
    Inventor: Olaf Drewes
  • Patent number: 8596394
    Abstract: A brake structure for a wheel rotating device includes a motor provided in a wheel and is driven for rotating the wheel, and a braking mechanism for actuating brake to brake the wheel. The motor includes: a motor housing; a stator positioned in and fixed to the motor housing; and a rotor positioned in the motor housing and facing to the stator. The braking mechanism includes: a brake rotor to rotate with the wheel; frictional members to be in contact with the brake rotor for generation of braking force; a pressing force generating unit for generating pressing force of the frictional members so that the frictional members are urged to and pressed against the brake rotor by supplying brake fluid through a brake fluid passage to transmit fluid pressure; and a housing for the pressing force generating unit. The brake fluid passage is formed inside a wall of the motor housing, and is connected to a brake fluid supply port provided in the housing for the pressing force generating unit.
    Type: Grant
    Filed: March 31, 2011
    Date of Patent: December 3, 2013
    Assignee: Honda Motor Co., Ltd.
    Inventors: Tsutomu Yoshino, Koichi Oku
  • Patent number: 8490759
    Abstract: A drum brake (10) is provided which has a pair of brake pads (12), each pad being moveable generally radially outwardly into contact with a brake drum by a respective operating lever (14) which is acted on at one end by a brake applying means (15) and pivoted (16) at the other end from a backplate (11). Each pad is contacted by a portion (14c) of the respective operating lever intermediate the lever ends and is moved radially outwardly between a pair of circumferentially spaced abutments (45) which extend generally perpendicular to the backplate (11) and which react braking torque when the brake is applied. The required pad to drum clearance is established by knock-back of the drum on the pads (12).
    Type: Grant
    Filed: December 8, 2006
    Date of Patent: July 23, 2013
    Assignee: Automotive Products Italia (SV) S.R.L.
    Inventors: Marco Monopoli, Ivan Cecchelli
  • Patent number: 7975815
    Abstract: A two-piece brake shoe is disclosed wherein each piece of the brake shoe has a free end and an end portion opposite the free end that is designed to be inter-fitting with an end portion of the other piece of the brake shoe. Each piece of the brake shoe has a brake lining on its outer surface. The two pieces of the brake shoe can be assembled together to form a C-shaped brake shoe having a gap between the free ends of the two pieces of the brake shoe. An actuator enlarges the gap between the free ends of the two pieces of the brake shoe to apply a brake in which the two-piece brake shoe is installed.
    Type: Grant
    Filed: March 3, 2009
    Date of Patent: July 12, 2011
    Inventor: John Joseph Carney
  • Patent number: 7918323
    Abstract: A magnetic resistor control assembly for a body training machine comprises a main shaft; a rotor, a stator, an adjusting unit, a sliding block set and a controller. An inner disk and an outer disk clamp of the stator clamping the adjusting unit. The sliding block set has guide tracks, an outer lateral wall of each guide track having a track trench. A lower middle portion of the sliding block set has a round hole; the roller being installed and rollable in the guide track; and the retaining rod of the roller is placed within the track trench. A controller is installed at an outer side of the stator; the controller having a transfer pin which displace in the straight grooves. When the transfer pin drives the sliding block set to move in the straight grooves, the gap between permanent magnets and the magnetic isolation ring is changed.
    Type: Grant
    Filed: December 16, 2007
    Date of Patent: April 5, 2011
    Assignee: Sports Art Industrial Co., Ltd
    Inventor: Hai-Pin Kuo
  • Patent number: 7815019
    Abstract: The present invention provides a braking mechanism comprising a brake cable set, a spring, a connector, a pair of brake shoes, a brake band, a base, and a brake drum. The brake cable set makes the connector move downwards upon braking, such that the connector coupled to the pair of brake shoes rotates to contact the brake band and thus cause friction, whereby achieving the object of braking.
    Type: Grant
    Filed: November 30, 2006
    Date of Patent: October 19, 2010
    Assignee: Wonderland Nurserygoods Co., Ltd.
    Inventors: Shun-Min Chen, Wen Qu Hu
  • Patent number: 7637361
    Abstract: A one-piece sheet metal combination retainer and anchor for use in a non-servo floating shoe drum brake assembly (10) having a pair of laterally extending ears (62, 64,94, 96) for axially retaining respective ends (22, 24) of a pair of brake shoes (12, 14), and a pair of rivet head reinforceable axially extending portions (58, 60, 82, 84) for anchoring the brake shoe ends during brake application. A base portion (50, 88) has one or more rivet (54, 56, 86, 90) or shaft (92) receiving apertures with the each of the axially extending portions abutted by a rivet head flat surface (70). The base portion has a transversely extending central region (76, 98) to provide, in conjunction with a brake assembly backing plate (52), a parking brake cable (80) retaining clamp.
    Type: Grant
    Filed: September 30, 2008
    Date of Patent: December 29, 2009
    Assignee: Robert Bosch GmbH
    Inventors: Djamel Charmat, Stefan U. Anger
  • Publication number: 20090283374
    Abstract: A drum brake apparatus is provided with a backing plate, a brake shoe, a shoe guide portion formed integrally with a backing plate by cutting-up, a guide surface on a rear surface of the shoe guide portion, an engagement projection that is formed on the brake shoe and slidably engages with the guide surface, and end portions that is formed on the shoe guide portion at both ends of the shoe guide portion in a circumferential direction of the drum brake apparatus and is continuous to the backing plate. Uplift of the brake shoe from the backing plate is prevented by engagement between the guide surface and the engagement projection.
    Type: Application
    Filed: May 12, 2009
    Publication date: November 19, 2009
    Applicant: AKEBONO BRAKE INDUSTRY CO., LTD.
    Inventors: Hironori AKADA, Masaki UCHIDA
  • Publication number: 20090218184
    Abstract: A two-piece brake shoe is disclosed wherein each piece of the brake shoe has a free end and an end portion opposite the free end that is designed to be inter-fitting with an end portion of the other piece of the brake shoe. Each piece of the brake shoe has a brake lining on its outer surface. The two pieces of the brake shoe can be assembled together to form a C-shaped brake shoe having a gap between the free ends of the two pieces of the brake shoe. An actuator enlarges the gap between the free ends of the two pieces of the brake shoe to apply a brake in which the two-piece brake shoe is installed.
    Type: Application
    Filed: March 3, 2009
    Publication date: September 3, 2009
    Inventor: John Joseph Carney
  • Patent number: 7568564
    Abstract: A parking brake having first and second brake shoes with first ends that engages an anchor on a backing plate and second ends that engages an adjuster. An actuator engages the first ends of the first and second brake shoes to apply an input force to move the first and second brake shoes into engagement with a drum to oppose rotation of a drum and effect a brake application. The adjuster is defined by a plurality of spring washers encapsulated in a cup and located between a first shaft connected to the first brake shoe and a second shaft connected to the second brake shoe. The spring washers yield to a predetermined resistance force greater than a input force such that a space between the first and second brake shoes is limited to a fixed distance and as a result a braking force to set at a predetermined maximum level.
    Type: Grant
    Filed: October 28, 2005
    Date of Patent: August 4, 2009
    Assignee: Robert Bosch GmbH
    Inventor: Djamel Charmel
  • Patent number: 7232014
    Abstract: In a motorcycle with a swing arm disposed on one side of a rear wheel for supporting the rear wheel. The swing arm is formed in a roughly triangular shape in a side view and a brake caliper of a rear brake is supported by the swing arm. The brake caliper is disposed relative to the rear brake so as to contrive a lowering of the center of gravity of the motorcycle and to enhance the rigidity of the swing arm. An opening portion is provided in a roughly central portion of a swing arm and a brake caliper is disposed in the opening portion.
    Type: Grant
    Filed: October 6, 2004
    Date of Patent: June 19, 2007
    Assignee: Honda Motor Co., Ltd.
    Inventor: Hirokatsu Nakaie
  • Patent number: 7070025
    Abstract: An automatic clearance adjusting device 10 that automatically adjusts the position of brake shoes (3, 4) based on the wear includes an adjuster gear that is rotatably depending on the amount of how much the brake shoes are parted from each other, a cam plate (25) rotated integrally with the adjuster gear (23) to drive the strut (27) that restricts the position of the brake shoes (3, 4), and an adjuster restricting lever (33) that restricts the rotation of the adjuster gear (23) based on the pressing force from the wheel cylinder (6) that parts between the pair of brake shoes (3, 4).
    Type: Grant
    Filed: September 20, 2004
    Date of Patent: July 4, 2006
    Assignee: Akebono Brake Industry Co., Ltd.
    Inventor: Toshifumi Maehara
  • Patent number: 7011194
    Abstract: A parking brake having first and second brake shoes each of which has a first end that engages an anchor post on a backing plate and a second end that engages an adjuster. An actuator that is located adjacent an anchor post engages a first end and an adjuster engages a second end of webs for the first and second brake shoes. A brake cable that is connected to the actuator provides a force for moving the first and second brake shoes into engagement with a drum to effect a brake application. The adjuster is characterized by the adjuster mechanism including a yieldable member for reducing the space between the second end engagement between the webs to limit braking force to a predetermined maximum. A strut of the adjuster compresses at loads above a predetermined set load to thereby reduces the effective braking diameter, input loads and hence output torque.
    Type: Grant
    Filed: August 19, 2004
    Date of Patent: March 14, 2006
    Assignee: Robert Bosch GmbH
    Inventors: James E. Doolittle, William E. Sherman, II
  • Patent number: 6962241
    Abstract: A cable disengagement prevention configuration for a drum brake device that provides a simple and safe connection of a brake cable to a brake lever and reliably prevents disengagement of the brake cable after connecting the brake cable to the brake lever. The cable disengagement prevention configuration mainly comprises a bowfront portion (18f) of the brake lever (18) and a brake shoe (11). The bowfront portion (18f) is formed between a primary seating (18e) and a secondary seating (18g) and is positioned apart from the primary seating (18e) at an opening side of a U-shaped groove (18d). The cable disengagement prevention configuration allows a cable end fitting (28) to pass through a gap between the brake lever (18) and the brake shoe (11) only when rotating the brake lever (18).
    Type: Grant
    Filed: February 12, 2004
    Date of Patent: November 8, 2005
    Assignee: Nisshinbo Industries, Inc.
    Inventor: Takashi Ikeda
  • Patent number: 6877592
    Abstract: A drum brake operating device effectively eliminated the possibility of damaging a brake cable has efficient logistics, and excellent performance in engaging and disengaging the brake cable. A cable end 27a of an inner cable 27 is hooked and rested on a bending section 18c directly extending from a free end 18b of a brake lever 18, a through hole 18e through which the cable end 27a passes is formed on the free end 18b parallel to the shoe web 11b at an inner side of the brake relative to an inner circumferential edge of a shoe web 11b.
    Type: Grant
    Filed: November 26, 2002
    Date of Patent: April 12, 2005
    Assignee: Nisshinbo Industries, Inc.
    Inventor: Takashi Ikeda
  • Patent number: 6799664
    Abstract: This invention relates to a vehicle drum brake assembly adapted to selectively frictionally engage a brake drum. The drum brake assembly includes a backing plate supported relative to a vehicle component and having at least three openings formed therethrough, at least one brake shoe supported on the backing plate for selective movement into frictional engagement with the brake drum, and a brake mechanism for selectively moving the brake shoe into frictional engagement with the brake drum. The drum brake assembly includes a pair of fasteners extending through two of the three openings provided in the backing plate to secure the backing plate to a fixed, non-rotatable component of the vehicle.
    Type: Grant
    Filed: March 29, 2002
    Date of Patent: October 5, 2004
    Assignee: Kelsey-Hayes Company
    Inventor: Frank Connolly
  • Patent number: 6766887
    Abstract: A brake cable for a dual mode type drum brake functioning as a leading-trailing type during the service brake and as a duo-servo type during the parking brake, may be easily arranged at a lower side of axle. The first and second brake levers (118), (119) of a parking brake actuator (117) have proximal portions (118a), (119a) pivotally supported between two ends of a second brake shoe (3) and at a lower end thereof; free ends (118b), (119b) extend in opposed direction from the proximal portions (118a), (119a) in parallel to face and functionally engage each other; a strut (120) extends between the second brake lever (119) and the pivot lever (16); and a brake cable (23) pulled to activate the free end (118b) is arranged adjacent to the anchor (7).
    Type: Grant
    Filed: February 10, 2003
    Date of Patent: July 27, 2004
    Assignee: Nisshinbo Ind. Inc.
    Inventors: Junichi Ohnishi, Yoshihiro Tatsumi
  • Patent number: 6651789
    Abstract: A drum-in-hat park brake assembly for a vehicle wherein first and second brake shoes are retained and aligned on a backing plate by first and second pins. The first and second shoes are moved into engagement with a drum by a force applied to an actuator by a cable assembly. The backing plate is characterized by a flange having a slot therein and the cable assembly is characterized by a cable with a fitting on a first end that has a stem with an annular rib thereon. The stem passes is passed through the slot while the annular rib engages the flange to limit the movement of the first end of the cable toward the actuator and to limit the movement of the first end toward the actuator mechanism to prevent the lever from being axially moved past a position of rest and change the radial alignment between the first and second brake shoes and the backing plate by the action of a release spring.
    Type: Grant
    Filed: June 13, 2002
    Date of Patent: November 25, 2003
    Assignee: Robert Bosch Corporation
    Inventors: Phillip Ingmar Loken, Robert Lee Wagner
  • Publication number: 20030168297
    Abstract: This dual mode drum brake provides less stroke loss during the brake operation; a stable parking brake effectiveness; and a comfortable feeling for the operator during the brake operation. A wheel cylinder actuator (15) is positioned between ends (lid) and (12d) of first and second brake shoes (11), (12); an anchor block (16) is positioned between the other ends (11e) and (12e); a shoe clearance adjustment device (18) is extended adjacent to the wheel cylinder actuator (15); a parking brake actuator (23) is extended adjacent to the anchor block (16); a bent portion (22c), formed on one side (22b) of a pivot lever (22) pivotally supported on the first brake shoe (11), is inserted between the first brake shoe (11) and the shoe clearance adjustment device (18) while the other side (22d) of the pivot lever (22) functionally engages with the parking brake actuator (23).
    Type: Application
    Filed: March 10, 2003
    Publication date: September 11, 2003
    Applicant: Nisshinbo Industries, Inc.
    Inventor: Takashi Ikeda
  • Patent number: 6581735
    Abstract: A drum brake device having a brake lever with sufficient rigidity, and securing a larger space at a central region of a brake in order to provide a long, effective brake lever stroke. A by-pass hole 60d, through which the shoe-hold pin 41 swingably rising from the back plate penetrates, is formed in the brake lever 60 positioned beneath the shoe web 20b of the brake shoe 20, and the bending sections 60e, 60f, 60g are integrally formed toward the back plate 10 at the outermost circumferential edge portion of the brake lever 60 surrounding the by-pass hole 60d.
    Type: Grant
    Filed: December 26, 2001
    Date of Patent: June 24, 2003
    Assignee: Nisshinbo Industries, Inc.
    Inventors: Seiji Asai, Takashi Ikeda
  • Publication number: 20030089561
    Abstract: A dual leading-shoe drum brake system includes two actuating levers that engage brake shoes. The levers are located between upper and lower anchors, with the bottoms of the actuating levers engaging the lower anchor as a fulcrum. A hydraulic cylinder is arranged to engage the upper ends of the levers to force them apart during braking. A brake shoe is positioned adjacent each lever so that the shoes are forced outward with the levers. The brake shoes selectively engage the upper and lower anchors during braking to receive the braking forces depending on the direction of rotation of the brake drum. The levers preferably float with respect to the backing plate, and the shoes are connected to the lever to float with them. A parking brake lever is arranged to engage an automatic adjusting link to provide dual leading-shoe operation during braking also.
    Type: Application
    Filed: November 13, 2001
    Publication date: May 15, 2003
    Inventor: Manuel Barbosa
  • Patent number: 6554110
    Abstract: A drum brake device having a brake lever with sufficient rigidity, and securing a larger space at a central region of a brake, to provide a large effective brake lever stroke. A by-pass hole 60d, which is freely penetrated by a shoe-hold pin 41 which swingably rises from the back plate is formed in the brake lever 60 positioned beneath the shoe web 20b of the brake shoe 20, and a section of the brake lever 60, surrounding the by-pass hole 60d, is formed in a hollow cavity 60e by drawing or in a groove 60f by bending to be positioned closer to and facing toward the back plate 10.
    Type: Grant
    Filed: December 26, 2001
    Date of Patent: April 29, 2003
    Assignee: Nisshinbo Industries, Inc.
    Inventors: Seiji Asai, Takashi Ikeda
  • Patent number: 6547047
    Abstract: A brake structure that prevents damaging the shoe-hold mechanism by way of securing a larger space at a central region of the brake and achieves a long effective and stable brake function. A by-pass hole 60d, through which the shoe-hold pin 41 is freely penetrating, is formed in the brake lever 60 positioned beneath the shoe web 20b of the brake shoe 20, and the stopper portion 60e contacting the shoe rim 20a is formed on the brake lever 60 so as to avoid the collision between the shoe-hold pin 41 and the by-pass hole 60d when the brake lever 60 is in operation.
    Type: Grant
    Filed: December 26, 2001
    Date of Patent: April 15, 2003
    Assignee: Nisshinbo Industries, Inc.
    Inventors: Seiji Asai, Takashi Ikeda
  • Patent number: 6454062
    Abstract: A mount bracket attached to a vehicle body is formed by pressing a metal plate to constitute a structure substantially in a shape of a flat plate having a circular plate portion overlapping a circular disc portion of a backing plate and a flange portion extended from an outer periphery of the circular plate portion as a portion attached to the vehicle body. A pair of brake shoes, a shoe drive mechanism and an anchor pin are constituted to be directly attached to the circular plate portion of the mount bracket without interposing the backing plate.
    Type: Grant
    Filed: February 19, 2002
    Date of Patent: September 24, 2002
    Assignee: Akebono Brake Industry Co., Ltd.
    Inventors: Masatoshi Arita, Hisanori Yokokura
  • Patent number: 6394237
    Abstract: It is an object of this invention to provide an automatic shoe clearance adjustment device for a drum brake mechanism designed to improve its durability by eliminating a gap, which is caused due to the manufacturing tolerances between the operating end surface of a brake shoe and the extended portion of an adjustment lever. To that end, a long hole (81) is formed to extend horizontally in the actuating direction of a service brake actuator (50); and the adjustment lever (80) is pivotally supported via a pin (14) with a capacity of making a rotation relative to the brake shoe (20) and a capacity of making a relative slide in approximately the same direction in which the service brake actuator (50) operates.
    Type: Grant
    Filed: December 23, 1999
    Date of Patent: May 28, 2002
    Assignee: Nisshinbo Industries, Inc.
    Inventor: Seiji Asai
  • Patent number: 6390248
    Abstract: It is an object of this invention to provide a drum brake device which solves a problem of decreasing the strength of a back plate near an anchor block and reduces potential damage to the parking brake cable. A pivot lever 60 is pivotally mounted on one brake shoe 20. Upper and lower portions of the pivot lever functionally engage with the other brake shoe 30 via struts 81, 70. A parking brake actuator 90 which pivotally supports on the upper strut 81 and activates upon an activation of a parking brake is arranged to be adjacent to a service brake actuator which activates upon an activation of a service brake. Preferably an operational part of the parking brake actuator is projected out from the brake back plate.
    Type: Grant
    Filed: February 17, 2000
    Date of Patent: May 21, 2002
    Assignee: Nisshinbo Industries, Inc.
    Inventor: Takashi Ikeda
  • Patent number: 6364076
    Abstract: A wear insert is provided for receiving trunnions on the ends of pieces used in affixing brake shoes to a brake shoe assembly. A vehicle brake shoe assembly has brake shoes which may be urged outwardly against a brake drum when a S-cam is rotated. The brake shoe has an arcuate brake table on which friction liners are installed. A brake web, comprising a pair of brake web elements, extends inwardly from the brake table toward the center of radius of the arcuate brake table. Each of these spaced apart web elements has a first and a second end, and each of the ends is provided with a trunnion receiving slot. The trunnion receiving slots at one end receive the trunnions of an anchor pin, and the trunnion receiving slots at the other end receive the trunnions of a cam follower. The wear insert is removably seated in at least one of the trunnion slots to be interposed between the slot and the trunnion.
    Type: Grant
    Filed: December 15, 1997
    Date of Patent: April 2, 2002
    Assignee: Dana Corporation
    Inventors: David A. Braun, Jon Pidwerbecki
  • Patent number: 6354410
    Abstract: A brake assembly of a vehicle for enduring corrosive road effects is disclosed. The brake assembly includes a mounting bracket having a bore. An anchor pin extends through the bore of the mounting bracket to rotatably support a brake shoe of the assembly. More specifically, the anchor pin includes first and second end portions and an outer surface, and the brake shoe rotates about the first and second end portions of the anchor pin relative to the mounting bracket. A rubber layer is disposed between the outer surface of the anchor pin and the bore of the mounting bracket to permit rotation of the brake shoe about the mounting bracket in the event the brake shoe becomes corrosively bonded to the pin. In such an event, a flexural stiffness of the rubber layer enables rotation of the anchor pin relative to the mounting bracket, and since the brake shoe is bonded to the anchor pin, the brake shoe also rotates relative to the mounting bracket thereby maintaining operation of the brake assembly.
    Type: Grant
    Filed: January 20, 2000
    Date of Patent: March 12, 2002
    Assignee: Meritor Heavy Vehicle Systems, LLC
    Inventors: Keith J. Chapman, Richard Martin Bellingham
  • Patent number: 6354411
    Abstract: A drum brake device in which the brake shoe return smoothly when releasing the parking brake on a slope. The points of the circumferential edges of the linings 6, 6 of the brake shoes 2, 3 at the service brake actuator side are located on the normal radial line B passed through the point of abutment of shoe clearance adjustment device 12 with the brake shoes 2, 3 and the brake center or are located closer to the anchor 9 than the line B.
    Type: Grant
    Filed: June 12, 1998
    Date of Patent: March 12, 2002
    Assignee: Nisshinbo Industries, Inc.
    Inventors: Seiji Asai, Takashi Ikeda, Yasushi Kobayashi
  • Patent number: 6302245
    Abstract: A drum brake device which reduces the amount of non-effective stroke (play) and prevents noise for the long period of time. The first strut 12 of an automatic shoe clearance adjustment device is provided adjacent to the service brake actuator 8 and between both brake shoes 2 and 3. The parking brake actuator 19 is provided adjacent to the anchor block 9. The central region of the pivot lever 11 is rotatably supported with the central region of one brake shoe 2 as the fulcrum. Both ends of the pivot lever 11 functionally engage with the first strut 12 and the second strut 22 of the parking brake actuator 19 which comprises an automatic stroke adjustment device automatically adjust the stroke. When the brake shoes are opened by the service brake operation, one end 11c of the pivot lever 11 is elastically supported by the first strut 12 of the automatic shoe clearance adjustment device, and the spring applies spring force so that both pivot lever 11 and first strut 12 operate together with one brake shoe 2.
    Type: Grant
    Filed: April 21, 1999
    Date of Patent: October 16, 2001
    Assignee: Nisshinbo Industries, Inc.
    Inventor: Takashi Ikeda
  • Patent number: 6290036
    Abstract: A drum brake device including, a pair of brake shoes, a wheel cylinder, anchor pins, and a control lever. The control lever is disposed between a wheel cylinder and a secondary shoe and has a structure that the flanges and are raised from both ends of a plate-like lever body. The first flange is formed at one end of the plate-like lever body and includes a piston contact portion. The second flange is formed at the other end thereof. The surface of the second flange, which faces an anchor pin, is used as an anchor contact portion, and the surface of the second flange, which faces the secondary shoe, is used as a shoe contact portion.
    Type: Grant
    Filed: May 11, 1999
    Date of Patent: September 18, 2001
    Assignee: Akebono Brake Industry Co., Ltd.
    Inventor: Toshifumi Maehara
  • Patent number: 6241061
    Abstract: The present invention is a drum brake shoe assembly having an improved support structure which limits the lateral travel of the leading brake shoe, to thereby reduce or eliminate audible impacts between the brake shoe and the backing plate of the drum brake assembly. In accordance with the invention, two or more spaced apart hold down devices are provided on the leading brake shoe while a single hold down device is used on the trailing brake shoe. Each of the hold down device includes a hold down pin connected at a first end to the backing plate of the drum brake assembly. The second end of each hold down pin extends through an opening in the web of the brake shoe. Springs such as coil springs or the like are disposed between the second ends of the hold down pins and the brake shoe web for urging the brake shoe against the backing plate.
    Type: Grant
    Filed: March 31, 1998
    Date of Patent: June 5, 2001
    Assignee: Hayes Lemmerz International, Inc.
    Inventor: Anwar R. Daudi
  • Patent number: 6223869
    Abstract: A drum brake device is provided which facilitates the pre-mounting of a long link, without increasing the number of components or the cost of the device. The long link (44) is pivotable on the central segment of one brake shoe (13). An engagement hook (48) protrudes from one or the other of the long link (44) or the one brake shoe (13). A notched groove (25) is formed in the other component thereof. The engagement hook (48) is inserted into the notched groove (25). The rotation of the long link (44) relative to the one brake shoe (13) will cause the long link (44) and one brake shoe (13) to be superimposable and detachable.
    Type: Grant
    Filed: January 28, 2000
    Date of Patent: May 1, 2001
    Assignee: Nisshinbo Industries, Inc.
    Inventors: Seiji Asai, Yasushi Kobayashi
  • Patent number: 6206148
    Abstract: A drum brake assembly (10) having first (12) and second (14) brake shoes retained on a backing plate (16). The first (12) and second (14) brake shoes have a first end (22,24) aligned on a hydraulic actuator assembly (26) and a second end (28,30) aligned on an anchor block (40). An adjustable strut mechanism (32) has an extendable shaft (33) with first end member (34) which engages the first brake shoe (12) and a second end member (36) which engages the second brake shoe (14). The first end member (34) is separated from the second end member (36) by a stem member (35). Stem member (35) has a threaded first end (39) which is mated with the second end member (36) and a smooth second end (31) which is retained in a bore of the first end member (34). The first (12) and second (14) brake shoes are urged toward the hydraulic actuator assembly (26) by a first resilient member (150) and toward the anchor block (40) by a second resilient member (48).
    Type: Grant
    Filed: January 29, 1999
    Date of Patent: March 27, 2001
    Assignee: Robert Bosch Corporation
    Inventors: Joseph Carl Capek, Norman Lee Hostetler
  • Patent number: 6131708
    Abstract: A shock absorber (13) is provided between the anchor (9) and the ends (2b, 3b) of the brake shoes (2, 3) facing the anchor (9) to reduce the impact noise between the brake shoe and the anchor.
    Type: Grant
    Filed: October 7, 1998
    Date of Patent: October 17, 2000
    Assignee: Nisshinbo Industries Inc.
    Inventor: Yoichi Fujiwara
  • Patent number: 6125976
    Abstract: A drum brake device that functions as a leading-trailing (LT) type when the service brake is applied, and as a duo-servo (DS) type when the parking brake is applied, in which the automatic shoe clearance adjustment mechanism functions precisely for a prolonged period, thereby generating no strange noise. This mechanism also eliminate any impact load applied to any of the components, thus enabling a lighter device. The middle segment of a long link 11 is pivotable in the middle of the one brake shoe 2.
    Type: Grant
    Filed: October 8, 1997
    Date of Patent: October 3, 2000
    Assignee: Nisshinbo Industries Inc.
    Inventors: Seiji Asai, Yasushi Kobay
  • Patent number: 6065571
    Abstract: A drum brake device is provided in which a stroke before effectuating the parking brake effect of the brake shoes is restricted so that any disconcerting feeling to the driver and any delay in effectuating the parking brake when in an emergency situation are eliminated. The drum brake device includes a pair of the brake shoes 20, 21, a pivot lever 36 pivotally provided at one of the two brake shoes 21, a shoe clearance adjustment device provided between one end of the pivot lever 36 and one end of the brake shoe 20, and a strut provided between the other end of the pivot lever 36 and one end of the brake lever 28, wherein the braking force is transferable between the two brake shoes 20, 21 through the connection with the pivot lever 36. This produces a duo-servo type of brake device. The brake shoe 21 functions as a trailing shoe in which the lining wears slower when the service brake is in operation.
    Type: Grant
    Filed: April 2, 1998
    Date of Patent: May 23, 2000
    Assignee: Nisshinbo Industries Inc.
    Inventor: Takashi Ikeda
  • Patent number: 6062353
    Abstract: A drum brake device is provided which facilitates the pre-mounting of a long link, without increasing the number of components or the cost of the device. The long link (44) is pivotable on the central segment of one brake shoe (13). An engagement hook (48) protrudes from one or the other of the long link (44) or the one brake shoe (13). A notched groove (25) is formed in the other component thereof. The engagement hook (48) is inserted into the notched groove (25). The rotation of the long link (44) relative to the one brake shoe (13) will cause the long link (44) and one brake shoe (13) to be superimposable and detachable.
    Type: Grant
    Filed: November 7, 1997
    Date of Patent: May 16, 2000
    Assignee: Nisshinbo Industries, Inc.
    Inventors: Seiji Asai, Yasushi Kobayashi
  • Patent number: 6003645
    Abstract: A drum brake device that functions as a leading-trailing (LT) type when the service brake is applied, and as a duo-servo (DS) type when the parking brake is applied, in which no strange noises are generated, nor is any impact load applied to any of the components, thus enabling a lighter device. The middle segment of a long link 11is pivotable in the middle of the one brake shoe 2. A shoe clearance adjustment device 12 is provided adjacent to a service brake actuator 8 between the other brake shoe 3 and the one end of the long link 11. A parking brake actuator 16 is provided adjacent to an anchor 9 and between the other brake shoe 3 and the other end of the long link 11. The force urging the second adjacent ends of the brake shoes toward each other, is greater than the force urging the first adjacent ends of the brake shoes toward each other.
    Type: Grant
    Filed: March 27, 1997
    Date of Patent: December 21, 1999
    Assignee: Nisshinbo Industries Inc.
    Inventors: Seiji Asai, Yasushi Kobayashi
  • Patent number: 5630484
    Abstract: A brake shoe for an internal shoe drum brake has an arcuate platform carrying a lining of friction material on its outer face. A web extends perpendicularly from the inner face of the platform and provides a shoe tip intended to be supported on an angled surface of the brake abutment. This shoe tip has a pair of differently directed surface portions. The invention also embraces an internal shoe drum brake incorporating a pair of the aforesaid shoes of which the abutment shoe tips are arranged so that the abutment is engaged respectively by non-corresponding ones of the shoe tip surface portions.
    Type: Grant
    Filed: July 10, 1995
    Date of Patent: May 20, 1997
    Assignee: Lucas Industries public limited company
    Inventor: Paul F. Ridealgh
  • Patent number: 5630486
    Abstract: A drum brake including a carrier plate (10) on which there are slidably mounted first and second shoes (12, 14) capable of being brought into frictional engagement against an internal face of the drum (20) by a hydraulic actuation device (22). A variable-length strut (40) which, in interaction with a tension spring (30), determines the separation of the shoes (12, 14) and which is located in the vicinity of the hydraulic actuation device (22). A brace (100) is located on the web (14a) of the first shoe (14) and includes an active part (114) interposed retractable between the first end of the web (14a) of the first shoe (14) and one end (79) of the force-transmission actuation device (60, 70).
    Type: Grant
    Filed: November 3, 1995
    Date of Patent: May 20, 1997
    Assignee: AlliedSignal Europe Service Techniques
    Inventor: Jean Charles Maligne
  • Patent number: 5445250
    Abstract: A brake shoe mounting for a vehicle drum brake hinges brake shoes to a brake anchor member to swivel around axes that are substantially parallel to the brake drum axis. To simplify the assembly and disassembly of the brake shoes and to improve the adaptation of surfaces of brake linings to the inner surface of the brake drum that expands under stress, the hinging of the brake lining shoes to the anchor member is achieved by ball bearings.
    Type: Grant
    Filed: November 3, 1993
    Date of Patent: August 29, 1995
    Assignee: Otto Sauer Achsenfabrik Keilberg
    Inventor: Hubert B. Koschinat
  • Patent number: 5398790
    Abstract: An internal shoe drum brake has a pair of brake shoes mounted on a backplate with one pair of adjacent shoe ends in sliding engagement with an abutment fixed to or integral with the backplate. An actuator disposed between the other pair of adjacent shoe ends is operable to move the shoes, in use, into braking engagement with the braking surface of the rotary brake drum. At least the actuator or abutment is provided with shoe tip engagement surfaces of arcuate form and the respective engaging shoe tips have a generally complementary arcuate form resulting in a generally even wear pattern for the shoes.
    Type: Grant
    Filed: October 18, 1993
    Date of Patent: March 21, 1995
    Assignee: Lucas Industries
    Inventor: Joseph H. McNinch, Jr.
  • Patent number: 5305861
    Abstract: A backing plate is formed by way of a liquid metal forging process or a die-casting process by using an aluminum alloy or an aluminum-based composite material. Essential portions to which forces are applied are formed with a large thickness, and the remaining portions with a small thickness. In addition, as another embodiment, iron pieces are embedded in portions to which forces are applied or which are liable to be worn.
    Type: Grant
    Filed: April 13, 1992
    Date of Patent: April 26, 1994
    Assignees: Akebono Brake Industry Co., Ltd., Akebono Research and Development Centre, Ltd.
    Inventor: Shigeyoshi Kobayashi
  • Patent number: 5228545
    Abstract: An internal shoe drum brake having a generally C-shaped shoe return spring of which an intermediate portion is retained on the backplate and respective end portions respectively engage brake shoes. The intermediate portion of the spring is retained by a retention device secured to the brake backplate and has opposed tongues embracing a portion of the spring in such a manner as to retain the spring relative to the backplate in directions generally parallel to the latter. The retention device also retains the spring in a direction perpendicular to the backplate and may be associated with or embody a mounting device for an electrical component.
    Type: Grant
    Filed: November 6, 1991
    Date of Patent: July 20, 1993
    Assignee: Lucas Industries public limited company
    Inventor: Andrew J. Blewitt
  • Patent number: 5159998
    Abstract: A drum brake is provided of the leading-trailing shoe type in which a single piece spring installed as a part of the assembly holds down the brake shoe assemblies against the backing plate and also retracts the shoes after brake actuation. The single piece spring also retains the lower ends of the shoes against the anchor plate. This arrangement eliminates the need for separate shoe hold-down springs and separate upper and lower return springs, resulting in a significant reduction in parts and labor for assembly.
    Type: Grant
    Filed: August 2, 1991
    Date of Patent: November 3, 1992
    Assignee: General Motors Corporation
    Inventors: Douglas M. Copp, Robert W. Hyde, Frank W. Brooks, Sr., Gary G. Holliday, Michael W. Fanelli
  • Patent number: 5099967
    Abstract: A drum brake assembly has brake shoes 2 and 3 within a rotatable drum 1. The shoes 2 and 3 are displaceable to effect braking by an hydraulic ram 7 and free ends 9 of the shoes react against an abutment 10. This reaction is effected through a layer of viscoelastic damping material and metal plate laminate 110 which may be carried by either the brake shoes or the abutment 10. The viscoelastic layer may be bonded between steel plates and secured by a spring clip to either the brake shoe or the abutment 10. Alternatively the viscoelastic layer may be bonded to the abutment 10. The laminate 110 can be accommodated within a recess in the abutment 10. The provision of the viscoelastic layers through which the brake shoes react on the abutment 10 alleviates the development of noise or squeal during use of the brake assembly.
    Type: Grant
    Filed: July 7, 1989
    Date of Patent: March 31, 1992
    Assignee: BBA Group Plc.
    Inventor: Allan M. Lang
  • Patent number: 5096027
    Abstract: A drum brake including a backing plate adapted to be mounted on a non-rotatable member of a vehicle, the backing plate having a shaft hole formed therethrough at the center thereof for accommodating a shaft of the vehicle, a drum adapted to be mounted on a rotatable member of the vehicle, a pair of brake shoes mounted on the backing plate and arranged to be expandable in the radial direction of the drum, a connector connecting respective ends of each of the brake shoes together, an anchor with which the other end of each of the brake shoes are engageable, and mounting bolts for mounting the backing plate on the non-rotatable member of the vehicle. The mounting bolts are located outwardly of the shaft hole and close to each other. The anchor is also fixed to the non-rotatable member of the vehicle by the mounting bolts.
    Type: Grant
    Filed: December 20, 1990
    Date of Patent: March 17, 1992
    Assignee: Tokico Ltd.
    Inventors: Kinzo Kobayashi, Shinichi Izumi
  • Patent number: 5058713
    Abstract: In a hydraulic drum brake and parking brake assembly, when a hydraulic actuator is operated to engage an opposed pair of brake shoes with a brake drum after a predetermined amount of wear had occurred on the friction pads of the brake shoes, a torsion spring adjusts a cam in the parking brake portion of the mechanism to compensate for the wear. The parking brake will thus operate properly despite the wear.
    Type: Grant
    Filed: February 19, 1991
    Date of Patent: October 22, 1991
    Assignee: Kelsey-Hayes Company
    Inventor: Anthony C. Evans
  • Patent number: 5038898
    Abstract: The present invention involves an improvement in a conventional drum brake assembly which utilizes a pair of brake shoes separated by an adjustable strut. A parking brake lever is pivotally attached to one of the brake shoes and when it is rotated in a braking direction, causes both brake shoes to expand by interacting with the adjustable strut. A plate spring attached to a backing plate allows the parking brake lever to pass in the braking direction after assembly of the drum brake, thereby removing slack and properly adjusting the drum brake. The plate spring can be displaced from outside the drum brake to allow the parking brake lever to pass in the opposite direction for disassembly of the drum brake.
    Type: Grant
    Filed: May 16, 1990
    Date of Patent: August 13, 1991
    Assignee: Akebono Brake Industry Co., Ltd.
    Inventor: Takashi Inoue