Rubber Block Reaction Means Patents (Class 91/369.2)
  • Patent number: 10286888
    Abstract: A vacuum brake booster for a motor vehicle brake system, comprising a displaceable force input member that is coupled to or can be coupled to a brake pedal, a chamber arrangement arranged in a booster housing having at least one working chamber and at least one vacuum chamber, which are separated from one another via at least one movable wall, a control valve assembly that can be actuated by the force input member, and a force output member for transmitting an operating force to a downstream brake system. The at least one working chamber can be fluidically connected optionally to a negative pressure source or the atmosphere by way of the control valve assembly. The control valve assembly comprises a control valve housing, in which an actuating piston that is coupled with the force input member s displaceably arranged, and a first valve seat, and a second valve seat.
    Type: Grant
    Filed: January 13, 2016
    Date of Patent: May 14, 2019
    Assignee: Lucas Automotive GmbH
    Inventors: José Manuel Calvo Martinez, Paul Warkentin, Kurt Wingender, Martin Hofmann
  • Patent number: 9878695
    Abstract: A pneumatic brake booster for a motor vehicle having a booster housing, the interior space of which is divided by at least one axially movable wall loadable with a pneumatic differential pressure into at least one working chamber and at least one vacuum chamber. The movable wall includes a diaphragm plate and a rolling diaphragm which is arranged sealingly between the booster housing and the control housing, having a control valve which controls the differential pressure, is arranged in the control housing, and which controls a connection of the working chamber to the vacuum chamber or atmosphere, having at least one extraction duct which is integrated into the control housing for connection of the vacuum chamber to the working chamber, wherein the extraction duct can be blocked by the control valve. A device is also provided between the vacuum chamber and working chamber to improve the noise behavior.
    Type: Grant
    Filed: September 17, 2013
    Date of Patent: January 30, 2018
    Assignee: Continental Teves AG & Co. oHG
    Inventors: Jürgen Faller, Ralf Jakobi
  • Patent number: 9533664
    Abstract: A method of manufacturing a plate plunger with which a reaction disc comes into contact and which determines a servo ratio of a vacuum booster, the plate plunger manufacturing method comprising primarily processing a plate plunger base material in such a way that an outer peripheral diameter of a reaction disc contact surface of the plate plunger becomes equal to or greater than an outer peripheral diameter, and forming the reaction disc contact surface of the plate plunger in such a way that it has an outer peripheral diameter corresponding to a desired servo ratio by secondarily processing a servo ratio determination surface.
    Type: Grant
    Filed: July 30, 2015
    Date of Patent: January 3, 2017
    Assignee: Bosch Corporation
    Inventor: Hiroyuki Yamaga
  • Patent number: 9499148
    Abstract: The present invention provides a dual-rate brake vacuum booster including a control valve body, a rubber reaction plate and a reaction rod, the rubber reaction plate being clamped between an end face of the control valve body and a base plate of the reaction rod, wherein accommodating spaces for accommodating an expansion deformation of the rubber reaction plate are respectively provided between a periphery of an end portion on one side of the rubber reaction plate and a periphery of the end face of the control valve body, and between a periphery of an end portion on the other side of the rubber reaction plate and the base plate of the reaction rod. The dual-rate brake vacuum booster prolongs the service life of the rubber reaction plate and can realize the dual-rate braking without using an additional element, thereby resulting in easy processing, simple structure and reduced cost.
    Type: Grant
    Filed: November 22, 2013
    Date of Patent: November 22, 2016
    Assignee: BWI (Shanghai) Co., Ltd.
    Inventor: Dongqiang Luo
  • Patent number: 9441592
    Abstract: An activation unit is disclosed having at least one actuator having a variable length disposed around at least one first axis. The activation unit operatively interacts with an activation element mounted so that it can be bi-directionally deflected along a second axis. The front side of the actuator is indirectly or directly engaged with a first piston, which can be deflected along the first axis in a mechanically positively driven manner. The first piston has a front side facing away from the actuator which axially borders at least regions of a transfer medium on one side. The transfer medium is radially surrounded relative to a first axis by a housing radially to the first axis, and axially borders at least regionally a front side of at least one second piston. The at least second piston can be deflected in a mechanically positively driven manner, and engages the activation element directly or indirectly.
    Type: Grant
    Filed: May 4, 2011
    Date of Patent: September 13, 2016
    Assignee: FRAUNHOFER-GESELLSCHAFT ZUR FORDERLUNG DER ANGEWANDTEN FORSCHUNG E.V.
    Inventors: Tobias Melz, Thorsten Koch, Holger Hanselka
  • Patent number: 9290168
    Abstract: A tie rod-type brake booster including a casing provided with a front cell and a rear cell, the front cell and the rear cell sealingly joining to each other, a tie rod caulked to the rear cell through the casing, a reinforcement plate to closely contact an inner surface of the front cell to enhance rigidity of the casing, the reinforcement plate being provided with a through hole penetrated by the tie rod, and a support member formed at a penetration portion of the front cell penetrated by the tie rod to fix the reinforcement plate, wherein the support member comprises a bent portion bent from the penetration portion of the front cell, and a pressing portion perpendicularly extending from the bent portion with respect to an axial direction of the tie rod.
    Type: Grant
    Filed: May 31, 2013
    Date of Patent: March 22, 2016
    Assignee: MANDO CORPORATION
    Inventor: Young Jun Son
  • Patent number: 9027340
    Abstract: A brake booster with regenerative brake force generation comprising a force input element coupled to a brake pedal. A chamber arrangement having a vacuum chamber and a working chamber that are separated from one another by a movable wall. A control valve actuated in accordance with a displacement of the force input element. The working chamber is connectable selectively to the vacuum chamber and the atmosphere to generate and reduce a differential pressure at the movable wall. The control valve has a control valve housing that is connected for joint movement to the movable wall. In a first actuation phase of the brake booster from its rest position, the force input element is displaceable relative to the control valve housing by an idle travel, in which the control valve remains non-actuated to suppress a build-up of a differential pressure at the movable wall.
    Type: Grant
    Filed: June 16, 2009
    Date of Patent: May 12, 2015
    Assignee: Lucas Automotive GmbH
    Inventors: Ludwig Friedsam, Stefan Klöck
  • Publication number: 20150090110
    Abstract: The present invention provides a dual-rate brake vacuum booster including a control valve body, a rubber reaction plate and a reaction rod, the rubber reaction plate being clamped between an end face of the control valve body and a base plate of the reaction rod, wherein accommodating spaces for accommodating an expansion deformation of the rubber reaction plate are respectively provided between a periphery of an end portion on one side of the rubber reaction plate and a periphery of the end face of the control valve body, and between a periphery of an end portion on the other side of the rubber reaction plate and the base plate of the reaction rod. The dual-rate brake vacuum booster prolongs the service life of the rubber reaction plate and can realize the dual-rate braking without using an additional element, thereby resulting in easy processing, simple structure and reduced cost.
    Type: Application
    Filed: November 22, 2013
    Publication date: April 2, 2015
    Inventor: Dongqiang Luo
  • Patent number: 8919239
    Abstract: Actuator piston (100) formed by an injection-molded piece (120) consisting of a cylindrical body (121) and a collar (122) to receive the hydraulic actuator (110) and the travel detector (160). The piece (120) comprises a shell (150) covering its front face and receiving the return spring (250) and the thrust rod (130). The actuator piston (110) includes lugs (115) engaged behind the lugs (125) of the body (121), by a pivoting movement about the axis. The rotational position is blocked by a locking and guiding sleeve (180).
    Type: Grant
    Filed: August 11, 2010
    Date of Patent: December 30, 2014
    Assignee: Robert Bosch GmbH
    Inventors: Philippe Richard, François Gaffe, Bastien Cagnac
  • Patent number: 8776665
    Abstract: Brake installation consisting of a master cylinder associated with a brake booster furnished with a motor driving an actuator piston and acting on the primary piston of the master cylinder by means of a reaction disk against which the piston rests. For a safety operation, the hydraulic actuator connected to the control rod actuated by the brake pedal rests on the rear face of the reaction disk. The actuator piston is combined with an auxiliary piston in order to interact with the reaction disk and it is guided by its sleeve-shaped portion in a bore of the body of the brake booster. An adapting shim is supported by the auxiliary piston in order to receive as a support the end of a rear rod, secured to the primary piston of the master cylinder. The thickness of the assembly formed by the adapting shim and the auxiliary piston is defined on mounting of the master cylinder and of the brake booster as a function of the free travel measured previously.
    Type: Grant
    Filed: October 18, 2010
    Date of Patent: July 15, 2014
    Assignee: Robert Bosch GmbH
    Inventors: Philippe Richard, Francois Gaffe, Bastien Cagnac
  • Patent number: 8671823
    Abstract: A pneumatic brake servo which can be acted on by a pneumatic differential pressure is described. The brake servo includes an actuable input member comprising a valve piston, an output member for acting on a master brake cylinder, and a control valve which is arranged in a control housing and which can be actuated by the valve piston for controlling the differential pressure. An elastic reaction element is arranged in a control housing recess and against which the output member bears. The input member acts with an input effective area A1 on the reaction element, and the output member acts with an output effective area A2 on the reaction element. The ratio of output effective area A2 to input effective area A1 determines the force boost ratio of the brake servo. Means are provided for adjusting the output effective area A2 in the assembled brake servo.
    Type: Grant
    Filed: April 19, 2007
    Date of Patent: March 18, 2014
    Assignee: Continental Teves AG & Co. oHG
    Inventors: Jürgen Faller, Klaus Lind
  • Publication number: 20130284012
    Abstract: In a vacuum brake booster, a valve mechanism having a negative pressure valve which communicates and cuts off between a negative pressure chamber and a variable pressure chamber according to a retractable movement of the plunger with respect to a valve body, and an atmosphere valve which communicates and cuts off between the variable pressure chamber and the atmosphere is assembled in a shaft hole of a valve body. In addition, the plunger and the key member are assembled in the shaft hole. In addition, in the vacuum brake booster, when the valve body is in the forward moving position and the plunger is moved rearward from the forward moving position, a protrusion tilting and holding the key member with respect to the valve body is provided.
    Type: Application
    Filed: April 25, 2013
    Publication date: October 31, 2013
    Applicant: ADVICS CO., LTD.
    Inventors: Yoshiyuki YASUI, Tomoyasu SAKAI
  • Patent number: 8267487
    Abstract: An actuator apparatus includes a booster creating an infinite boost ratio while a plunger valve does not contact with a reaction disc, and an oil reservoir and a pedal simulator unit forming a hydraulic circuit to follow hydraulic hysteresis characteristics. Therefore, it is possible to achieve insensibility of pedal changes transmitted from a master cylinder, minimize changes in pedal feel according to changes of pedal effort correspondingly generated, while blocking vibration transmitted to the pedal when achieving regenerative braking, and provide pedal feel following or simulating the hydraulic hysteresis characteristics.
    Type: Grant
    Filed: November 19, 2009
    Date of Patent: September 18, 2012
    Assignee: Hyundai Mobis Co., Ltd.
    Inventor: Jongsung Kim
  • Patent number: 8215226
    Abstract: In the negative pressure booster, when in operation, a reaction disc (35) deflects due to the reaction from an output shaft (34) and pushes a pin (28) backward, and the pin (28) pushes a vacuum valve seat member (21) backward via an arm (25). Thereafter, the vacuum valve seat member (21) pushes up a valve body (15) backward via a vacuum valve portion (17), and an atmosphere valve portion (16) moves backward relative to a valve body (4). The stroke of an input shaft (11) is shortened by an amount an atmosphere valve (20) and a vacuum valve (23) have moved backward. As the valve body (15) is pushed up backward, further, a balance position for the atmosphere valve (20) and the vacuum valve (23) shifts backward depending upon the output (input). Therefore, the stroke of the input member is shortened at the time of producing a large output.
    Type: Grant
    Filed: June 11, 2007
    Date of Patent: July 10, 2012
    Assignee: Bosch Corporation
    Inventor: Satoru Watanabe
  • Patent number: 8166865
    Abstract: A sensor feeler device for a brake booster. The sensor feeler device (4) includes an axially moveable cylinder (40), the movement of which can be controlled by the control rod which is itself controlled by the brake pedal, a sensor feeler piston (5) able to move axially in said moving cylinder (40), and a spring (44) that tends to push the sensor feeler piston (5) forward and keep its front face substantially in the same plane as the front face of the moving cylinder.
    Type: Grant
    Filed: November 6, 2008
    Date of Patent: May 1, 2012
    Assignee: Robert Bosch GmbH
    Inventors: Bruno Berthomieu, Francisco Carles, Joan Simon Bacardit
  • Patent number: 8050836
    Abstract: A method for determining whether a panic braking maneuver has been initiated in a vehicle with a brake pedal includes the steps of receiving brake pedal travel data, receiving brake pedal force data, determining a rate of change of acceleration of the brake pedal from the brake pedal travel data, determining a rate of change of acceleration of force applied to the brake pedal from the brake pedal force data, comparing the rate of change of acceleration of the brake pedal with a first predetermined value and a third predetermined value, and comparing the rate of change of acceleration of force applied to the brake pedal with a second predetermined value and a fourth predetermined value.
    Type: Grant
    Filed: October 17, 2007
    Date of Patent: November 1, 2011
    Assignee: GM Global Technology Operations LLC
    Inventors: Timothy M. Karnjate, William K. Manosh
  • Patent number: 7930969
    Abstract: A boosted brake having a booster with a decompression arrangement wherein an output push rod has a head with a plurality of openings that extend into a stem and create a plurality of arcuate grooves. The openings receive a plurality of projections that extend from a piston retained in a sleeve held in a movable partition. A spring acts on the projections and urges the piston into engagement with a reaction disc through which an actuation force is supplied a master cylinder. A predetermined reaction force from the master cylinder acts on piston and overcomes the spring to allow the reaction disc to expand and thereby modify the reaction force. The arcuate grooves in the stem allow for a maximum diameter for spring with a minimum diameter for stem that corresponds to a diameter of piston in order to creates a desired braking in response to an emergency brake application.
    Type: Grant
    Filed: July 31, 2008
    Date of Patent: April 26, 2011
    Assignee: Robert Bosch GmbH
    Inventors: Charles Horner, Robert Spaargaren
  • Patent number: 7698988
    Abstract: The invention relates to a brake booster intended to transmit handbrake commands. This booster essentially comprises a plunger (3) able to move axially under the command of the control rod (1). An enclosure (2) contains a working chamber (21) and a vacuum chamber (20) which are separated by a wall (22) able to move axially under the effect of the plunger (3) and/or of a difference in pressure between the vacuum chamber and the working chamber. A three-way valve (4) controlled by the plunger (3) allows the working chamber (21) to be connected either to the vacuum chamber or to atmospheric air. Finally, a bearing piece (17) controlled by the moving wall (22) allows the control rod (1) to be driven along.
    Type: Grant
    Filed: September 28, 2007
    Date of Patent: April 20, 2010
    Assignee: Robert Bosch GmbH
    Inventors: Bruno Beylerian, Aleksander Hurwic
  • Patent number: 7637200
    Abstract: A pneumatic brake booster includes a booster housing, subdivided into at least two chambers by at least one axially movable wall to which a pneumatic differential pressure can be applied, a control valve controlling the differential pressure and being arranged in a control housing, an operable input member, connected to a valve piston, an output member which applies a boosting force to a master cylinder, as well as an accommodating element, which accommodates a rubber-elastic reaction element and the output member abutting thereon in a radial direction, with the accommodating element being axially and radially supported on the control housing and being held in an axial direction by means of a holding element.
    Type: Grant
    Filed: October 7, 2005
    Date of Patent: December 29, 2009
    Assignee: Contential Teves AG & Co. oHG
    Inventors: Horst Krämer, Thomas Sellinger
  • Patent number: 7634960
    Abstract: A pneumatic brake booster for motor vehicles includes a booster housing, subdivided into at least one working chamber and at least one vacuum chamber by at least one axially movable wall to which a pneumatic differential pressure can be applied, a control valve controlling the differential pressure and arranged in a control housing to connect the working chamber to the vacuum chamber or atmosphere, the valve having two concentrically arranged sealing seats and an elastically deformable valve member, an operable input member connected to a valve piston whose movement is limited by a transverse member that can be introduced in a radial direction into the control housing, an elastic reaction element, an output member applying a boosting force to a master cylinder, and ventilating and bleeding ducts in the control housing.
    Type: Grant
    Filed: October 7, 2005
    Date of Patent: December 22, 2009
    Assignee: Continential Teves AG & Co. oHG
    Inventors: Horst Krämer, Michael Haber
  • Patent number: 7526992
    Abstract: A variable force rate vacuum booster including a reaction disk having an input surface and an output surface, the reaction disk being formed from a deformable material, an input rod position relative to the reaction disk to apply an input force to the input surface of the reaction disk, an output rod having a reaction surface generally engaged with the output surface of the reaction disk, the output rod defining a bore therein, and a plunger positioned in the bore and biased out of the bore by a biasing force, the plunger being adapted to resist deformation of the reaction disk into the bore until the input force reaches a threshold value.
    Type: Grant
    Filed: February 13, 2007
    Date of Patent: May 5, 2009
    Assignee: Delphi Technologies, Inc.
    Inventors: Patrick A. Mescher, Kiron Bhaskar, Roger S Sexton
  • Patent number: 7448308
    Abstract: A valve piston 8 of a vacuum type booster device is provided with a bypass passage 51 which is defined between a sound-absorbing member 27 and an input rod 23 to communicate directly with the atmosphere and a sliding-type plate valve 52 composed of three plate valve parts 53, 54 55 which are arranged around the input rod 23 to be relatively slidable in radial directions. When the input rod 23 is advanced beyond a predetermined distance relative to the valve piston 8, the sliding-type plate valve 52 is separated between two of the plate valve parts 53, 54, 55 to make the bypass passage 51 communicate with the inside of the valve piston 8.
    Type: Grant
    Filed: December 12, 2006
    Date of Patent: November 11, 2008
    Assignee: Advics Co., Ltd.
    Inventors: Yoji Inoue, Masaki Nakagawa
  • Publication number: 20080202327
    Abstract: A pneumatic brake booster with a booster housing, which comprises a first and a second housing shell and is subdivided into a working chamber and a vacuum chamber by an axially movable wall to which a pneumatic differential pressure can be applied, with the movable wall being formed of a diaphragm plate and a diaphragm abutting thereon that includes a radially inward sealing bead and a radially outward sealing bead for sealing the two chambers and the radially outward sealing bead is compressible between the housing shells. To improve the compression of the radially outward sealing bead, the radially outward sealing bead has a circumferential, uniform rib structure.
    Type: Application
    Filed: July 21, 2006
    Publication date: August 28, 2008
    Applicant: CONTINENTAL TEVES AG & CO. OHG
    Inventors: Jurgen Faller, Ralf Jakobi
  • Publication number: 20080190281
    Abstract: A variable force rate vacuum booster including a reaction disk having an input surface and an output surface, the reaction disk being formed from a deformable material, an input rod position relative to the reaction disk to apply an input force to the input surface of the reaction disk, an output rod having a reaction surface generally engaged with the output surface of the reaction disk, the output rod defining a bore therein, and a plunger positioned in the bore and biased out of the bore by a biasing force, the plunger being adapted to resist deformation of the reaction disk into the bore until the input force reaches a threshold value.
    Type: Application
    Filed: February 13, 2007
    Publication date: August 14, 2008
    Inventors: Patrick A. Mescher, Kiron Bhaskar, Roger S. Sexton
  • Patent number: 7370571
    Abstract: In a negative pressure type booster device, secondary passages 53 communicating directly with the atmosphere is formed between the internal surface of a sliding cylindrical portion 8b of a valve piston 8 and the external surface of a silencer 27, and communication means 60 is provided for being controlled to vary its path area in dependence on the advance amount of an input rod 23 when the same is moved beyond a predetermined distance relative to the valve piston 8. Thus, when a brake pedal 25 is stepped on strongly, the atmospheric air can be led from the secondary passages 53 through the communication means 60 to a variable pressure chamber 6, so that the property of the responsiveness in braking operation can be improved to a responsiveness enhancing property which varies in dependence on the manner of stepping the brake pedal 25.
    Type: Grant
    Filed: June 7, 2006
    Date of Patent: May 13, 2008
    Assignee: Advics Co., Ltd.
    Inventors: Kaoru Tsubouchi, Yoji Inoue
  • Publication number: 20080105116
    Abstract: The invention relates to a tandem pneumatic brake booster (1) for a vehicle. The objective is to prevent a blocking of a booster thrust rod (4) in the maximum travel position. The blocking appears following a sealed adhesion of a first plate skirt (12) on a seal (22) of the tandem booster. This seal blocks a vacuum in a first front chamber (5). To prevent this blocking, provision is made to crenelate a first lip (23) pressed against the pneumatic piston (3) of a seal. Merlons prevent a sealed adhesion of the plate skirt (12) over the whole seal (22). This absence of adhesion creates a leakage of air to the first front chamber (5) and allows a return to a rest position.
    Type: Application
    Filed: October 31, 2007
    Publication date: May 8, 2008
    Applicant: ROBERT BOSCH GMBH
    Inventors: Ignacio Diaz Bueno, Christian Ast, Christian Caquet, Jean-Pierre Michon
  • Publication number: 20080087163
    Abstract: A method of controlling a machine having a hydraulically actuated linkage includes lowering a load suspended by the leakage at least in part by leaking hydraulic fluid from a portion of a hydraulic actuation system, and generating a drift compensation control signal responsive to leaking hydraulic fluid. A machine includes an electronic controller in control communication with a valve, the electronic controller being configured to compensate for leakage induced drift of at least one hydraulic actuator of a machine hydraulic system by selectively commanding adjusting of the valve if drift criteria for the hydraulic system are satisfied.
    Type: Application
    Filed: October 17, 2006
    Publication date: April 17, 2008
    Inventors: Chad T. Brickner, Philip F. Lange, Dominik Skwarnicki
  • Publication number: 20070144339
    Abstract: A valve piston 8 of a vacuum type booster device is provided with a bypass passage 51 which is defined between a sound-absorbing member 27 and an input rod 23 to communicate directly with the atmosphere and a sliding-type plate valve 52 composed of three plate valve parts 53, 54 55 which are arranged around the input rod 23 to be relatively slidable in radial directions. When the input rod 23 is advanced beyond a predetermined distance relative to the valve piston 8, the sliding-type plate valve 52 is separated between two of the plate valve parts 53, 54, 55 to make the bypass passage 51 communicate with the inside of the valve piston 8.
    Type: Application
    Filed: December 12, 2006
    Publication date: June 28, 2007
    Inventors: Yoji Inoue, Masaki Nakagawa
  • Patent number: 7234384
    Abstract: A pneumatic brake booster (10) for a motor vehicle comprising a casing (12) within a moving partition (14) is secured to a moving piston (12) having an inlet valve (52) and a re-equalizing valve (50) with offset seats borne by first (136) and second (142) tubular sleeves, The first sleeve (136) is slideably mounted in the moving piston (22) with a travel (d) which is determined by first bayonet-fitting (154) that is interposed between the first sleeve (136) and the moving piston (22) and that are locked against rotation by the second sleeve (142).
    Type: Grant
    Filed: January 13, 2006
    Date of Patent: June 26, 2007
    Assignee: Robert Bosch Corporation GmbH
    Inventors: Jean-Charles Maligne, Ulysse Verbo, Philippe Richard
  • Patent number: 7207261
    Abstract: Reaction force from a reaction member is divided and transmitted to a front shaft portion of a plunger via abutment member and to a flange portion of the plunger via a spring unit. The spring unit includes a tubular first holding member assembled to the front shaft portion of the plunger and being engageable, at its front end portion, with the reaction member, a second holding ember assembled to a rear end portion of the first holding member and having a rear end portion which extends rearward from the first holding member for engagement with the flange portion, and Belleville springs held between the first and second holding members. When the reaction force transmitted from the reaction member to the first holding member exceeds the load of the springs, the first holding member moves while compressing the springs and engages with a stepped portion of a valve body.
    Type: Grant
    Filed: November 9, 2005
    Date of Patent: April 24, 2007
    Assignee: Advics Co., Ltd.
    Inventor: Kaoru Tsubouchi
  • Patent number: 7194946
    Abstract: A pneumatic servomotor (12) for power-assisted braking for a motor vehicle, which servomotor is of the type having a substantially cylindrical rigid casing (16) inside which a moving transverse partition (18) is movably mounted that has a peripheral skirt (28) which is made of sheet metal and which is covered, at least in the vicinity of its periphery (40), with a sealing diaphragm (30) made of an elastomer material and whose periphery (32) is fixed to the casing (16) in leaktight manner, said servomotor being characterized in that, in the vicinity of the periphery (40) of the skirt (28), the skirt is provided with a stamped annular recess (42) defining an internal groove (44) which serves to receive snugly a peripheral bead (46) which projects from the surface of the diaphragm (30) in order to fix the diaphragm (30) to the skirt (28) in leaktight manner.
    Type: Grant
    Filed: October 6, 2004
    Date of Patent: March 27, 2007
    Inventor: Juan Simon Bacardit
  • Patent number: 7159953
    Abstract: This invention mainly relates to a reaction-disk device, to its manufacturing process and to a pneumatic servomotor for an assisted braking, including such reaction device. A reaction device according to the present invention comprises a receiving cavity, fitted with a reaction disk made of incompressible or substantially incompressible materials, comprising: a) an applying surface for the plunger (or a similar member, connected to a member, actuated by the driver, such as the brake pedal, and advantageously connected to at least one element of the three-way valve of a pneumatic assistance servomotor); b) an applying surface for the push rod (or a similar member for a force transmission to the master cylinder, more particularly a tandem master cylinder); and c) a surface with a resilient response to the working pressures exerted on the reaction disk, so as to be elastically deformable on braking or, at the very least, during an emergency braking operation.
    Type: Grant
    Filed: November 13, 2001
    Date of Patent: January 9, 2007
    Assignee: Robert Bosch GmbH
    Inventor: Juan Simon Bacardit
  • Patent number: 7121186
    Abstract: A pneumatic servomotor for an assisted braking including an emergency-braking assistance device to increase the assistance ratio when an input force is applied to the control rod that is higher than a predetermined value through an extrusion of the reaction disk. The device (D) has a plastically-deformable first member (68) and second member (74) to accurately set a jump height of the servomotor and the activation force.
    Type: Grant
    Filed: December 17, 2003
    Date of Patent: October 17, 2006
    Assignee: Robert Bosch GmbH
    Inventors: Bruno Berthomieu, Juan Simon Bacardit, Fernando Sacristan
  • Patent number: 7100997
    Abstract: A boosted brake (10) having a booster (12) for activating a primary piston (54) of a master cylinder (14) by way of a feeler (42), a reaction disk (28) and a push rod (52). The push rod (52) that is housed a decompression piston (62) and returned elastically by a spring (70) to a position of rest has at least two radial branches (64) in order to provide two boost ratios which differ according to the intensity of the input force.
    Type: Grant
    Filed: January 26, 2004
    Date of Patent: September 5, 2006
    Assignee: Robert Bosch GmbH
    Inventors: Bruno Berthomieu, Juan Simon Bacardit, Fernando Sacristan
  • Patent number: 7089846
    Abstract: A negative pressure type booster device possesses a valve mechanism constructed to compensate for insufficient depressing force applied to a brake pedal upon emergency braking. Upon depression of the brake pedal, first negative pressure valves contact first negative pressure valve seats to block a variable pressure chamber from communication with a constant pressure chamber, and an atmosphere valve seat is separated from an atmosphere valve to communicate the variable pressure chamber with atmosphere. A partition member thus moves forwards depending on the pressure difference between the chambers to output a propelling force from an output rod. When the brake pedal is stepped on quickly, a valve member is urged backwards by a spring member causing second negative pressure valve seats to contact second negative pressure valves and move the valve member backwards. The atmosphere valve separates from the atmosphere valve seat, and the variable pressure chamber quickly communicates with atmosphere.
    Type: Grant
    Filed: May 7, 2004
    Date of Patent: August 15, 2006
    Assignee: Advics Co., Ltd.
    Inventors: Kaoru Tsubouchi, Nobuyuki Hirota, Kenichi Kobayashi
  • Patent number: 7086321
    Abstract: A brake system having a master cylinder (14) actuated by a moving piston (24) that is fixed to a moving partition (18) in a booster (12). Piston (24) has a front face (26) that acts on a primary piston (30) of the master cylinder (14) by way of a reaction disk (28) located between a rear end of the primary piston (30). The front face (26) has a feeler (44) that is fixed to a control rod (36) of the booster (12) and comes into contact with the reaction disk (28) to transmit a reaction force from the master cylinder (14) to the control rod (36). The front end (48) of the feeler (44) includes at least one stud (50) which projects parallel to the axial direction and engages the reaction disk (28) to provide for proportionality between the force that is transmitted between the control rod (36) and the force exerted on the primary piston (30).
    Type: Grant
    Filed: April 1, 2005
    Date of Patent: August 8, 2006
    Assignee: Robert Bosch GmbH
    Inventors: Ignacio Diaz Bueno, Christian Caquet, Maurice Gebauer
  • Patent number: 7086320
    Abstract: A brake booster, in particular for motor vehicles, having a control valve for controlling the boosting force generated by the brake booster. The control valve comprises a control valve housing, an input element, an output element and a thrust piece, which is disposed between the input element and the output element and acts upon the output element. The thrust piece in dependence upon a relative movement between the thrust piece and the control valve housing caused by the input element is supported releasably against the control valve housing by means of a coupling element biased by a spring. The spring and the coupling element are designed as an integral coupling component, which is fastened to the control valve housing.
    Type: Grant
    Filed: January 28, 2005
    Date of Patent: August 8, 2006
    Assignee: Lucas Automotive GmbH
    Inventor: Ernesto Bravo Villamayor
  • Patent number: 7077050
    Abstract: Pneumatic brake booster, in particular for a motor vehicle, comprising a reaction disk (30) interposed between a plunger (28) carried by a control rod actuated by the brake pedal and a thrust rod (32) acting on the primary piston of a tandem master cylinder, the reaction disk (30) being housed inside an annular metal part (36) which cooperates with a stop (50) of the thrust rod (32) by the intermediary of thermal expansion element (48) designed to compensate for the thermal expansion of the reaction disk (30) and its effect on a point of change of assistance ratio.
    Type: Grant
    Filed: October 6, 2004
    Date of Patent: July 18, 2006
    Assignee: Robert Bosch GmbH
    Inventor: Juan Simon Bacardit
  • Patent number: 7063001
    Abstract: A pneumatic servomotor for power-assisted braking for a motor vehicle having a control rod (38) for opening and closing at least one axial inlet valve (52) that is interposed between a front chamber (16) connected to a pressure source having a pressure (Pa) greater than a first pressure (P1) and a back chamber (18) and at least one axial balancing valve (50) for actuating a moving partition (14) located between the front chamber (16) and the back chamber (18). The servomotor being characterized by one-piece floating tubular element (76) having axially offset transverse faces (78,80) that have sealing elements (82,84) for sealing the axial inlet valve (52) and the balancing valve (50) with the control rod (38) being activated by a dish-shaped washer (49) carrying two springs (40,122) of different stiffnesses.
    Type: Grant
    Filed: April 25, 2003
    Date of Patent: June 20, 2006
    Assignee: Robert Bosch GmbH
    Inventors: Jean-Charles Maligne, Philippe Richard, Stéphane Lacroix, Ulysse Verbo
  • Patent number: 7051640
    Abstract: A pneumatic brake booster with reduced dead travel comprising a skirt (10) which can move in a sealed manner in a casing, delimiting a low-pressure chamber and a variable-pressure chamber, with respect to a pneumatic piston (16) over a certain travel. The displacement of the pneumatic piston being controlled by the skirt in a first direction when the skirt comes into contact with a first face of an annular plate (100) which is arranged in the low-pressure chamber and is fastened rigidly to the pneumatic piston, and the displacement of the piston in a second direction is controlled by an elastic means mounted in the low-pressure chamber and bearing by one of its ends on a second face of the annular plate (100).
    Type: Grant
    Filed: October 6, 2004
    Date of Patent: May 30, 2006
    Assignee: Robert Bosch GmbH
    Inventor: Juan Simon Bacardit
  • Patent number: 7032496
    Abstract: A vacuum servo brake has an input member by which a valve arrangement may be acted upon at an input force to connect a working chamber selectively to the outside or to a vacuum chamber (separated from the working chamber by a piston which may be brought into operative connection with a main cylinder via an output member to generate a braking pressure). Provided on the piston is an elastomeric reaction member through which a reaction force may be applied to the input member. The output member has a stop which, with a predetermined input force, abuts against the working piston to alter an amplification ratio of the brake. Arranged adjacent to the reaction member is at least one volume take-up means into which part of the reaction member may be displaced in the event of the vacuum servo brake being actuated. Furthermore, the stop is preferably of resilient construction.
    Type: Grant
    Filed: September 22, 2003
    Date of Patent: April 25, 2006
    Assignee: FTE automotive GmbH & Co. KG
    Inventors: Horst Schramm, Rolf Seidi, Joachim Hoch
  • Patent number: 6978710
    Abstract: An elastic member is interposed between a reaction disk and a plunger. By moving the plunger to open a poppet seal such that atmospheric air is introduced into the variable pressure chambers, a pressure differential is created between the variable pressure chambers and constant pressure chambers (negative pressure). As a result, servo power is applied to an output rod, and a resulting reaction force is partly transmitted back to an input rod through the reaction disk. During a rapid braking operation, a piston is caused to retract by a pin, thus pushing the elastic member into an outer peripheral groove formed on the piston so that the elastic member is axially compressed. As a result, the movement amount of the plunger can be increased without receiving a reaction force, enabling the rapid development of servo power.
    Type: Grant
    Filed: July 28, 2004
    Date of Patent: December 27, 2005
    Assignee: Kabushiki Kaisha Hitachi Seisakusho
    Inventors: Toshio Takayama, Mitsuhiro Endo, Shuzo Watanabe
  • Patent number: 6976417
    Abstract: The subject of the present invention is a pneumatic brake booster comprising an envelope in which a skirt (2) slides in a sealed manner, a pneumatic piston (8) rigidly attached to the skirt, a three-way valve (20) actuated by a control rod (22) operated at a first end by a pedal, a plunger (32) mounted at a second longitudinal end which is the opposite end and slideably mounted in the body of the piston, the control rod and the plunger forming a brake control (33), characterized in that the said booster comprises means (68) of damping the relative and in particular oscillatory movement between the brake control (33) and the pneumatic piston (8).
    Type: Grant
    Filed: April 26, 2004
    Date of Patent: December 20, 2005
    Assignee: Robert Bosch GmbH
    Inventors: Cédric Leboisne, Teddy Rossi, Christian Rocher
  • Patent number: 6959637
    Abstract: A control valve for a brake booster having a first member with a first bore, a second member located in the first bore and having a second bore, a plunger located in the second bore and connected to an input member. A gear fixed to the second member with teeth that engage a first rack retained in the first body and a stationary rack within the brake booster. A force applied to the input member controls the development of a pressure differential that moves a wall during a brake application. Movement of the wall causes a rotative torque to be transmitted from the first rack into teeth such that the gear moves with respect to the second rack and the second body to separates from the first body and as a result the travel of input member is less than the travel of the wall during a brake application.
    Type: Grant
    Filed: August 31, 2004
    Date of Patent: November 1, 2005
    Assignee: Robert Bosch GmbH
    Inventors: William John Penninger, Gary L. Doty, Richard Becker McClain, John Edmund Mackiewicz
  • Patent number: 6935705
    Abstract: A pneumatic brake booster (10) having a moving piston (22) for urging an actuating rod (34) of a master cylinder (28) in response to actuation of a plunger (56). The plunger has a front end that passes through the piston (22) that forms a first feeler (62) that penetrates a reaction disc (44) located between the piston (22) and the actuating rod (34) to transmit to the plunger (56) a reaction force of the master cylinder (28) and a second feeler (68) that is pushed by the plunger (56) when the control rod (46) is actuated at a rate higher than a determined rate and immobilized by a one-way engagement device (70) in an axial position that varies with respect to the piston (22) and then is driven by the piston to push the second feeler (68) into the disc (44) so that the first feeler (52) applies a braking force more rapidly.
    Type: Grant
    Filed: May 23, 2002
    Date of Patent: August 30, 2005
    Assignee: Robert Bosch GmbH
    Inventors: Juan Simon Bacardit, Bruno Berthomieu, Fernando Sacristan, Antony Auguste
  • Patent number: 6931979
    Abstract: A reaction device wherein a ratio of input force to output force for a brake booster is sequentially changed during a brake application. An actuation force derived from a pressure differential acts on a movable wall and is communicated through a cage as an output force to an push rod. The output force is a functional ratio of the input force as modified by a reaction disc and elastic means during a brake application. The reaction device functions as a rigid member until the input force reaches a first predetermined level Fd and a first boost ratio is in effect until a second predetermined force Fe is reached and a second boost ratio is in effect until a third predetermined input force level Ff is reached and a third boost ratio is in effect until a fourth predetermined fource level is reached.
    Type: Grant
    Filed: January 25, 2002
    Date of Patent: August 23, 2005
    Assignee: Robert Basach GmbH
    Inventors: Juan Simon Bacardit, Bruno Berthomieu, Fernando Sacristan
  • Patent number: 6907731
    Abstract: A master cylinder apparatus is provided with a master cylinder and a booster. The booster comprises a booster shell whose interior is divided into a variable and constant pressure chambers. The master cylinder comprises a master piston inserted in a cylinder body. The cylinder body includes an installation flange to which the booster shell is attached. When the brake pedal is operated, a pull mechanism operates a control valve to communicate the variable-pressure chamber with atmosphere. The master piston is moved by an output member of the booster to generate a fluid pressure in the master cylinder that is delivered to wheel cylinders. The installation flange of the cylinder body can be attached to a dashboard so that the booster shell is disposed in the passenger room or the engine room, with the cylinder body protruding into the other room.
    Type: Grant
    Filed: November 10, 2003
    Date of Patent: June 21, 2005
    Assignee: Advics Co., Ltd.
    Inventors: Tomoo Ogura, Katsuhiro Mita
  • Patent number: 6901843
    Abstract: A brake booster having a movable partition (6) through which an output force is carried through a first reaction device (24,25) to a brake system in response to an input force applied to a brake rod (9). A second reaction device (29-34) is located between the brake rod (9) and the first reaction device (24,25) and includes a first spring (34) that is compressed by a predetermined reaction force and the input force such that any further input force is carried through a second spring (32) into the movable partition (6) to provide and additional force in the development of an output farce corresponding to a desired a brake application.
    Type: Grant
    Filed: November 26, 2001
    Date of Patent: June 7, 2005
    Assignee: Robert Bosch GmbH
    Inventor: Jean-Pierre Gautier
  • Patent number: 6877416
    Abstract: This braking force amplifier with dual amplification ratios includes a thrust assembly (71) comprising a reaction rod (82) connected to the master-cylinder of the corresponding brakes and mounted to be axially displaceable under the control of a plunger (22) between a first braking state corresponding to a first ratio of amplification of the braking force, and a second braking state corresponding to a second ratio of amplification of the braking force, and a deformable reaction disc (96) interposed between a piston (70) and the plunger on the one hand, and the reaction rod on the other. The thrust assembly includes means (104) for absorbing the deformations of the reaction disc, the said deformations contributing to determining the braking force for which passage between the first and the second braking states takes place.
    Type: Grant
    Filed: January 17, 2002
    Date of Patent: April 12, 2005
    Assignee: Delphi Technologies, Inc.
    Inventor: Philippe Georges Castel
  • Patent number: 6843161
    Abstract: A vacuum brake booster (10) is described, comprising a vacuum chamber (16) and a working chamber (18) separated from each other by a movable wall (14), as well as a control valve (20) which comprises a housing (22) coupled workingly to the movable wall and which is capable of controlling the supply of atmospheric pressure or above-atmospheric pressure to the working chamber (18) in dependence upon the displacement of an input element (26) of the brake booster (10) to achieve a pressure difference at the movable wall (14). The vacuum brake booster (10) has a sensing disk (30), which is disposed in an axially displaceable manner inside the control valve housing (22), as well as a coupling device (66), which introduces forces acting counter to the actuating direction upon the sensing disk (30) in a coupled position into the control valve housing (22) and in an uncoupled position via an actuating piston (28) into the input element (26).
    Type: Grant
    Filed: October 18, 2002
    Date of Patent: January 18, 2005
    Assignee: Lucas Automotive GmbH
    Inventor: Peter Schlüter