With Multiple Master Cylinders Patents (Class 188/345)
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Patent number: 10946846Abstract: Disclosed herein is an electronic brake system and a method for controlling the same are disclosed. The electronic brake system includes a master cylinder for discharging oil according to displacement of a brake pedal, a pedal displacement sensor sensing brake pedal displacement, a simulation apparatus providing pedal pressure responsive to the sensed pedal displacement, a hydraulic pressure supply unit for generating hydraulic pressure using a motor that operates based on the sensed pedal displacement, a hydraulic circuit for supplying the hydraulic pressure generated from the hydraulic pressure supply unit to the caliper, a cut valve positioned between the master cylinder and the hydraulic circuit for transmitting or blocking the hydraulic pressure discharged from the master cylinder, and a controller for blocking at least one of the cut valve and braking control with a target pressure according to a pressure in the simulation apparatus when the simulation apparatus fails.Type: GrantFiled: May 29, 2019Date of Patent: March 16, 2021Assignee: MANDO CORPORATIONInventor: Sanghoon Kim
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Patent number: 10532723Abstract: A hydraulic device for controlling braking for farm tractors, earthmovers and like machines, comprises a master cylinder and brake booster. A piston of the brake booster defines first and second chambers which, under rest conditions, are in communication and, during braking, are cut off with the first chamber being put in communication with a discharge chamber of the master cylinder. The piston of the master cylinder is driven by a drive piston shaped to define with a plunger of the piston of the brake booster a hollow space through which the first chamber communicates with either the second chamber or the discharge chamber, depending on device operating conditions. In the plunger, a seat for a gasket-valve is arranged to cooperate with the drive piston, during braking, to prevent fluid leakage between the second and the first chamber as a consequence of the sliding of the drive piston caused by braking.Type: GrantFiled: December 7, 2016Date of Patent: January 14, 2020Assignee: VHIT S.P.A.Inventor: Leonardo Cadeddu
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Patent number: 10272889Abstract: A brake system for a vehicle includes a first brake device for braking a first wheel of the vehicle, a second brake device for braking a second wheel of the vehicle, a first brake pedal which is paired with the first wheel, a second brake pedal which is paired with the second wheel, a brake control valve which is designed to act on the first brake device and/or the second brake device, a first control valve for controlling a brake pressure in the first brake device, and a second control valve for controlling a brake pressure in the second brake device. The brake system further has an electromechanical switching module in order to block or at least reduce a braking effect of the second brake device while the first brake pedal is being actuated, and the switching module is designed to block or at least reduce a braking effect of the first brake device while the second brake pedal is being actuated.Type: GrantFiled: July 14, 2017Date of Patent: April 30, 2019Assignee: KNORR-BREMSE Systeme fuer Nutzfahrzeuge GmbHInventors: Florian Finkl, Andreas Buch, Michael Herges
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Patent number: 10059319Abstract: An actuating unit for a brake system, comprises a pedal connection element that charges a booster piston with an actuating force. An elastically deformable reaction disk, absorbs the actuating and boosting forces of the booster and releases the sum of said forces to a working piston. An electrically controllable pressure supply device outputs pressure which acts upon the booster piston. The actuating unit further comprises an extension arm for detecting the differential path between the pedal connection element and the booster piston and a sensor device that detects the differential path. An electronic control unit receives the signals from the sensor device and uses said signals for controlling the pressure supply device. Differential path information is transported by the extension arm to a location near the sensor device that is radially and axially offset by the reaction disk.Type: GrantFiled: April 10, 2015Date of Patent: August 28, 2018Assignee: Continental Teves AG & Co. oHGInventor: Stefan Drumm
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Patent number: 10029661Abstract: A recess is formed in a rear portion of a pressurizing piston, and a small-diameter rod is formed in a front portion of an input piston. A sleeve is disposed inside the recess, and the small-diameter rod is liquid-tightly and slidably fitted to the sleeve. A space between the small-diameter rod and the recess serves as a volume chamber, which is held in communication with a reservoir. The input piston and the pressurizing piston are slidably fitted to each other via the sleeve. Therefore, the generation of a frictional force between the input piston and the pressurizing piston can be made unlikely, and the pressurizing piston can be favorably prevented from advancing as the input piston advances.Type: GrantFiled: May 7, 2013Date of Patent: July 24, 2018Assignees: TOYOTA JIDOSHA KABUSHIKI KAISHA, ADVICS CO., LTD.Inventors: Hiroshi Isono, Akihiko Miwa
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Patent number: 9956942Abstract: Provided is a reservoir in which an inlet for injecting a liquid from the outside into a reservoir chamber in which the liquid is stored is provided at one side of a vehicle, a communication path that extends from the inlet toward the other side of the vehicle is provided, and a communication opening that is capable of making communication between the communication path and the reservoir chamber is formed. A surface part that gets higher from one side of the vehicle toward the communication opening of the other side of the vehicle in a state in which the reservoir chamber is mounted in the vehicle is formed at an upper portion of the reservoir chamber.Type: GrantFiled: October 29, 2014Date of Patent: May 1, 2018Assignee: HITACHI AUTOMOTIVE SYSTEMS, LTD.Inventors: Naganori Koshimizu, Hiroshi Shimura, Ryoichi Yagi
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Patent number: 9903431Abstract: The invention relates to an operating apparatus for a brake, having an actuator unit with a linearly mobile actuator element, an actuating unit with a linearly mobile actuating element by means of which a braking element can be moved relative to a brake disc or a brake drum, and a transmission unit for transmitting a force from the actuator element to the actuating element. The transmission unit has a deflection device by means of which the force which is transmitted from the actuator element to the actuating element can be deflected from a first direction into a second direction.Type: GrantFiled: August 1, 2014Date of Patent: February 27, 2018Assignee: SAF-HOLLAND GmbHInventor: Olaf Drewes
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Patent number: 9873415Abstract: A system for controlling a brake of a unit hauled by a work vehicle may generally include a valve assembly. When a speed of the work vehicle exceeds a predetermined speed threshold, the valve assembly may be configured to allow the brake to be actuated when first and second brake pedals of the work vehicle are depressed, either individually or simultaneously. However, when the speed of the work vehicle is less than the predetermined speed threshold, the valve assembly may only be configured to allow the brake to be actuated when both of the first and second brake pedals are depressed simultaneously.Type: GrantFiled: February 23, 2016Date of Patent: January 23, 2018Assignee: CNH Industrial America LLCInventors: Christopher Hill, Jerry L. Brinkley, Kenneth McCabe
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Patent number: 9776609Abstract: A pressure supply device is provided for a hydraulic braking system of a vehicle including a first pressure chamber and a second pressure chamber, which are delimited by at least one piston of the pressure supply device, a motor and a gear unit, with the aid of which the at least one piston is displaceable at least in a first direction with the aid of an operation of the motor, an exceeding of a predefined maximum pressure difference between a chamber pressure present in the first pressure chamber and a reservoir pressure present in the brake fluid reservoir being preventable with the aid of a reservoir isolating valve, which is connectable to a brake fluid reservoir of the braking system, hydraulically connected to the first pressure chamber via an opening of the reservoir isolating valve. Also described here is a hydraulic braking system for a vehicle. In addition, a method is provided for operating a hydraulic braking system of a vehicle.Type: GrantFiled: June 15, 2015Date of Patent: October 3, 2017Assignee: ROBERT BOSCH GMBHInventor: Matthias Kistner
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Patent number: 9551363Abstract: Untreated bosses are formed in advance in two directions on a cylinder mechanism. The bosses on one side are formed as mounts to attach a motor cylinder device to a vehicle body, and the other bosses are formed as ports to connect to the cylinder mechanism. The mount bosses are formed on the outside in the width direction of the vehicle, and the port bosses are formed on the inside in the width direction of the vehicle.Type: GrantFiled: November 17, 2011Date of Patent: January 24, 2017Assignees: Honda Motor Co., Ltd., Autoliv Nissin Brake Systems Japan Co., Ltd.Inventors: Arata Inoue, Takaaki Ohnishi, Kazuaki Murayama, Takehiro Horiuchi, Makoto Sawai, Kaoru Akahane, Toru Mabuchi, Nobuyuki Kobayashi
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Patent number: 9475475Abstract: A hydraulic brake system includes: a plurality of hydraulic brakes; and a first hydraulic pressure generator including a first hydraulic pressure source and a first hydraulic pressure controlling portion that is configured to control an output hydraulic pressure of the first hydraulic pressure source to a target hydraulic pressure. The plurality of hydraulic brakes includes (a) at least one disk brake and (b) at least one drum brake. The first hydraulic pressure generator is in communication with a first brake cylinder that is the brake cylinder of each of the at least one disk brake, and is isolated from a second brake cylinder that is the brake cylinder of each of the at least one drum brake, in a case when a regenerative cooperative control is executed.Type: GrantFiled: March 28, 2011Date of Patent: October 25, 2016Assignee: Toyota Jidosha Kabushiki KaishaInventors: Daisuke Nakata, Takahiro Okano
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Patent number: 9296369Abstract: The invention is directed to a brake control system having an electronic control device, a brake pedal, via the actuation of which a braking intent in the form of a pedal travel and/or a pilot pressure and/or a pedal force is specifiable by the driver. The system further includes secondary braking components which are controllable decoupled from the brake pedal for setting pressure values in the wheel brake cylinders of a motor vehicle wheel. According to the invention, the brake pedal characteristic is variably specifiable as a function of defined conditions.Type: GrantFiled: October 15, 2014Date of Patent: March 29, 2016Assignee: Bayerische Motoren Werke AktiengesellschaftInventor: Thomas Toelge
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Patent number: 9122301Abstract: A tractor steering and braking arrangement has a substantially vertically extending structural support column 11 for connection at a lower end 12 to a floor 13 of a tractor cab and carrying means 18 to support a steering wheel 15 at its upper end. At least one hydraulic master cylinder 29, 30 for operation of brakes of the tractor is supported within the column 11. The master cylinder 29, 30 includes an operating rod 27, 28 and an associated piston which is moved substantially vertically by an associated brake operating pedal 19, 20. The pedal is positioned at one side of the structural support column 11 and supported for pivoting from the column. Where separate left and right brakes are used, separate left and right master cylinders are mounted vertically within the support column 11. Both pedals are also mounted for pivoting from the column at a position 21 inside the column.Type: GrantFiled: May 21, 2012Date of Patent: September 1, 2015Assignee: AGCO International GmbHInventors: Klaus Brugger, Christoph Wintergerst, Herbert Kerler, Franz Erhard
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Patent number: 8979216Abstract: A vehicle power braking system has separate left and right brakes (11, 12) operable from a source of pressurized fluid (13) via relay valve means (16) controlled by separate left and right brake operating pedals (14, 15) to provide steering assistance during a turn. The relay valve means delivers a brake operating pressure proportional to the depression of the associated brake operating pedal to separate left and right shift valves (17, 18), each shift valve being connected with its respective operating pedal (14, 15) by a respective pilot line (19, 20) so that when each pedal is operated the associated shift valve is opened by the respective pilot line pressure to supply the proportional pressure from the relay valve means to the respective brake (11, 12).Type: GrantFiled: November 29, 2010Date of Patent: March 17, 2015Assignee: AGCO GmbHInventors: Martin Brenninger, Klaus Brugger, Hans-Peter Zeiler
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Patent number: 8944223Abstract: A hydraulic brake handle assembly, wherein the response time of the hydraulic brake caliper can be much improved, and the brake action can be carried out immediately. When the brake lever is pressed, the volume of the oil pushed by the piston is doubled due to the hydraulic brake handle assembly is provided with two piston portions inserted in two oil chambers. Since the response time of the hydraulic caliper of the present invention is improved, it allows the brake pads of the hydraulic caliper to be assembled at a relatively large distance from the brake disc, so that sand won't get struck between the brake pads and the brake disc, and the brake disc remains useful when they are bent out of plain rubbing after using.Type: GrantFiled: August 30, 2012Date of Patent: February 3, 2015Assignee: Tien Hsin Industries Co., Ltd.Inventor: Jason Miles
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Patent number: 8820855Abstract: A braking system for farm tractors and similar vehicles, has a differential braking system and a hydraulic system for the braking assistance forming a system unit (H) which includes two circuit branches (H1,H2), each circuit branch operating the braking with respect to one side of the vehicle. To the system unit are applied, through connection interfaces (36,37), two control units (C1,C2), each control unit including an electrovalve (20) and a distributor (24) operated by the electrovalve, each distributor controlling the operation of the system unit (H) with respect to one of the circuit branches, and each electrovalve being singularly controlled by an electronic control circuit (EL) provided with sensors of the main vehicle parameters, such as a sensor (V) of the vehicle speed, sensors (R) of the speed of singular wheels, sensors (P) of the positions of the braking pedals and a sensor (A) of the position of the accelerator pedal.Type: GrantFiled: July 12, 2010Date of Patent: September 2, 2014Assignee: VHIT S.p.A. UnipersonaleInventor: Leonardo Cadaddu
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Patent number: 8789668Abstract: The invention concerns a master cylinder assembly (10, 110) for balancing the braking of a couple of wheels (LBW, RBW) of a vehicle. Each master cylinder (12) has a hollow body (14), a piston (15) and a chamber (16) suitable for containing a fluid having a primary control pressure depending on a driving force applied on the piston (15) and intended to be transmitted to a utilizing device (LBB, RBB). The assembly further includes a balancing duct (58) into which the chambers (16) come out, and a plurality of normally closed balancing valves (60).Type: GrantFiled: July 13, 2010Date of Patent: July 29, 2014Assignee: Vhit S.p.A.Inventors: Luigi Alberti, Leonardo Cadeddu
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Patent number: 8777331Abstract: A brake booster for use in a hydraulic braking system having a brake pedal, a master cylinder, and a hydraulic control unit includes a housing, a screw drive arrangement positioned at least partially in the housing, a motor coupled to the housing for actuating the screw drive arrangement, and a piston assembly positioned in the housing. The piston assembly and the housing together at least partially define a first fluid chamber having an opening for providing fluid communication with the master cylinder, and a second fluid chamber having an opening for providing fluid communication with the hydraulic control unit. The screw drive arrangement is movable relative to a piston of the piston assembly between an engaged position, in which the first fluid chamber is isolated from the second fluid chamber, and a disengaged position in which the first fluid chamber is not isolated from the second fluid chamber.Type: GrantFiled: September 23, 2011Date of Patent: July 15, 2014Assignee: Robert Bosch GmbHInventor: Toshiaki Fukushima
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Patent number: 8733515Abstract: There is provided a caliper body for a two system-type disc brake for a vehicle, which is reduced in size and has an improved air bleeding property by employing a simple structure. In the caliper body for the two-system disc brake for the vehicle, a communication path, which connects cylinder holes for a first brake system, and a first bleeder hole are formed rectilinearly on an outside, in a disc radius direction, of an imaginary line IL1 which rectilinearly connects inner edges, in the disc radius direction, of cylinder holes for a first brake system and a cylinder hole for a second brake system is provided on an outside, in the disc radius direction, of the communication path.Type: GrantFiled: February 10, 2010Date of Patent: May 27, 2014Assignee: Nissin Kogyo Co., Ltd.Inventors: Yoichi Hiramori, Toshihiro Kusano
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Patent number: 8696072Abstract: A hydraulic system for an aircraft includes a master cylinder, a wheel brake, a pressure supply, a reservoir, and a shut-off valve in communication with the master cylinder, the wheel brake, the pressure supply and the reservoir. The shut-off valve can include a seal that is configured to preclude fluid flow between the pressure supply and the reservoir through the valve. The shut-off valve can be operable in a first position which blocks fluid flow between the pressure supply and the wheel brake through the valve and a second position which allows fluid flow between the pressure supply and the wheel brake through the valve. Fluid pressure from the master cylinder can control operation of the valve between the first position and the second position. Failure of the seal can result in fluid flow from the brake pressure supply toward the master cylinder.Type: GrantFiled: October 12, 2010Date of Patent: April 15, 2014Assignee: Honda Patents & Technologies North America, LLCInventors: Hiroki Oyama, Michael Joseph Boland
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Patent number: 8670911Abstract: A vehicle stop control device is provided. The device is configured to perform a stop control for stopping a vehicle by adjusting a braking force for wheels and includes a target deceleration setting unit which sets a target deceleration as a target for stopping the vehicle so as to have a smaller value as a vehicle body velocity comes closer to zero, a deceleration obtaining unit which obtains a vehicle body deceleration of the vehicle, a control unit which performs the stop control of setting the braking force to have a smaller value as a subtraction value obtained by subtracting the target deceleration from the vehicle body deceleration is greater, and causing the set braking force to be applied to the wheels; and a determining unit which determines that a road surface is an ascent road when the braking force set by the control unit is zero.Type: GrantFiled: December 23, 2010Date of Patent: March 11, 2014Assignee: Advics Co., Ltd.Inventors: Shotaro Fukuda, Yukio Mori
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Patent number: 8522935Abstract: A balancing valve for balancing the braking system of a vehicle equipped with two separated master cylinders for the independent braking of the wheels situated at the two sides of the vehicle, wherein at least one of two ring packings which cooperate with the intake of a transfer channel connecting both master cylinders is housed within a containment space that allows a displacement of this packing to substantially increase the volume of the space located on the packing side communicating with the transfer channel.Type: GrantFiled: December 12, 2008Date of Patent: September 3, 2013Assignee: VHIT S.p.A. UnipersonaleInventor: Leonardo Cadeddu
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Patent number: 8424979Abstract: A reduction in size, weight and cost of a brake system of a motorcycle provided with a circulating-type ABS is achieved by a brake system provided with a circulating-type ABS and a by-wire-type brake system. In the brake system, solenoid valves, hydraulic pressure sensors, accumulators and pumps are integrated into a unit, and concurrently stroke simulators are attached to the unit as separate bodies.Type: GrantFiled: February 26, 2007Date of Patent: April 23, 2013Assignee: Honda Motor Co., Ltd.Inventor: Kazuhiko Tani
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Patent number: 8380412Abstract: A control device (10) for a brake-power-assisted brake system of a vehicle having a first input device (26) for a supplied first information item (28) relating to a supplied assistance force (Fu) of a brake booster (14) of the brake-power-assisted brake system, a second input device (30) for a supplied second information item (32) relating to a total force (Fg) comprising the assistance force (Fu) and a driver braking force (FI) supplied by activation of an activation element (12) of the brake-power-assisted brake system, an evaluation device (36) which is configured to define a third information item relating to a proportional relationship between the total force (Fg) and the assistance force (Fu) taking into account the first information item (28) and the second information item (32), and an output device (44, 50) which is configured to supply at least one control signal (46, 52) to at least one component (14, 54) of the brake-power-assisted brake system taking into account the defined third information iteType: GrantFiled: February 9, 2010Date of Patent: February 19, 2013Assignee: Robert Bosch GmbHInventors: Herbert Vollert, Remy Garnier, Reinhard Weiberle, Timo Jahnz, Volker Mehl, Frank Kneip, Dirk Mahnkopf, Jens Kolarsky, Stephan Hoenle
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Patent number: 8342615Abstract: A braking system having a master cylinder to which wheel brake circuits (I, II) can be connected, a first piston coupled to a brake pedal, a second piston by means of which the master cylinder is actuated, a third piston actuated by the first piston and connected in a force transmitting fashion to the second piston, a simulation device which gives the driver of the vehicle a pedal sensation, an intermediate space between the second piston and third piston, a pressure generating device which controls the pressure in the intermediate space, a pressure medium reservoir vessel which is under atmospheric pressure and which can be connected hydraulically to the intermediate space, and means for electrically controlling the pressure in the intermediate space.Type: GrantFiled: August 29, 2007Date of Patent: January 1, 2013Assignee: Continental Teves AG & Co. oHGInventor: Stefan Drumm
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Patent number: 8332113Abstract: A brake control apparatus for a vehicle includes four wheel braking apparatuses, a first hydraulic pressure generating apparatus, a front-wheel hydraulic circuit connecting the hydraulic pressure generating apparatus to the two of the wheel braking apparatuses, a rear-wheel hydraulic circuit connecting the hydraulic pressure generating apparatus to the other two of the wheel braking apparatuses, a second hydraulic pressure generating apparatus generating an auxiliary pressure, a braking operation variable detecting means, a reference amount determining means for determining a reference amount of auxiliary hydraulic pressure, an obtaining means for obtaining at least one of state quantities indicating a load condition, a driving condition and slipperiness of wheel, a target amount determining means determining a target amount of auxiliary hydraulic pressure of each hydraulic circuit to be equal to or greater than the corresponding reference amount of auxiliary hydraulic pressure, and a pressure regulating meanType: GrantFiled: April 9, 2008Date of Patent: December 11, 2012Assignee: Advics Co., LtdInventors: Yoshiyuki Yasui, Hiroaki Aizawa, Motoshi Suzuki
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Patent number: 8322799Abstract: A brake system, in particular a dual circuit brake system, for a motor vehicle, includes brakes which can be activated by a brake pedal operatively connected to a brake servo. Each brake engages one wheel. The brake system is designed such that a brake servo is assigned to each brake of at least one brake circuit, and the brake servos can be activated by the brake pedal.Type: GrantFiled: October 22, 2009Date of Patent: December 4, 2012Assignee: KNORR-BREMSE Systeme fuer Nutzfahrzeuge GmbHInventors: Robert Trimpe, Johann Baumgartner, Robert Gruber, Aleksandar Pericevic, Stephan Pitzing, Steffen Geissler
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Patent number: 8292051Abstract: A valve intended to disconnect, in specific circumstances, the braking of the front wheels, and/or of a trailer whose braking system is connected through a trailer braking valve, for the braking system of a farm tractor or similar vehicle which includes two master cylinders, operated by two separate braking pedals, directly controlling the braking of the rear wheels, and controlling the braking of the front wheels and/or the braking device of the trailer through the disconnection valve. The disconnection valve includes a body, first and second inlet connections connected to the two master cylinders, and a delivery connection connected to a braking circuit of the front wheels and/or to the trailer brake valve. The valve body has a bore wherein is installed one movable piston subjected to the action of pressure applied to the first inlet connection.Type: GrantFiled: May 10, 2007Date of Patent: October 23, 2012Assignee: VHIT S.p.A.Inventors: Leonardo Cadeddu, Luigi Alberti
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Patent number: 8251461Abstract: To improve brake force in front and rear combined brake control, a brake control device includes a front wheel brake caliper having at least two front wheel cylinders, and a rear wheel brake caliper having a rear wheel cylinder. A front wheel brake conduit is disposed between a front wheel master cylinder and one of the front wheel cylinders, and a rear wheel brake conduit is disposed between a rear wheel master cylinder and the rear wheel cylinder. A pressure amplification conduit branches from a first position in the rear wheel brake conduit and merges with the rear wheel brake conduit at a second position downstream of the first position. A combined brake conduit branches from a third position in the rear wheel brake conduit positioned downstream of the first position and is coupled to the other of the front wheel cylinders. A first switch control valve is disposed between the first position and the third position in the rear wheel brake conduit.Type: GrantFiled: January 16, 2008Date of Patent: August 28, 2012Assignee: Bosch CorporationInventors: Hiroaki Atsushi, Tohru Masuno
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Patent number: 8231181Abstract: In a brake system including a master cylinder and an electrically-driven hydraulic pressure generator with front and rear pistons, when the hydraulic pressure generator cannot be operated and a failure of a first hydraulic system linked to a rear fluid chamber of the generator occurs and makes a first hydraulic system open to the atmosphere, the brake-fluid pressure of a second hydraulic system transmitted from the master cylinder to a wheel cylinder via a front fluid chamber of the generator is used to perform braking. A forward-facing third front cup seal provided at an intermediate portion of the front piston prevents the brake-fluid pressure generated by the master cylinder from leaking out from a front supply port via the rear fluid chamber. At the same time, a stopper prevents the pressure of the front fluid chamber from moving the front piston excessively backward. The braking is accordingly secured by use of the second hydraulic system linked to the front fluid chamber of the motor cylinder.Type: GrantFiled: December 10, 2008Date of Patent: July 31, 2012Assignee: Honda Motor Co., Ltd.Inventor: Kunimichi Hatano
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Patent number: 8177306Abstract: A braking system for a vehicle having two pairs of wheels, has two master cylinders operating as pumps, wherein each master cylinder is operated by its own brake pedal and controls the braking on one rear wheel, as well as on the front wheels through a valve for the disconnection of the front vehicle braking. Each master cylinder is of the tandem type including two sections, the first section controlling the braking of the front wheels through the valve, whereas the second section controls the braking of that rear wheel, being a part of the pair of rear wheels, which is associated with the master cylinder. The first sections of both master cylinders are supplied by a first oil reservoir and the second sections of both master cylinders are supplied by a second oil reservoir at least partially independent from the first oil reservoir.Type: GrantFiled: March 20, 2006Date of Patent: May 15, 2012Assignee: VHIT S.p.A.Inventors: Leonardo Cadeddu, Luigi Alberti
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Publication number: 20120111678Abstract: The invention concerns a master cylinder assembly (10, 110) for balancing the braking of a couple of wheels (LBW, RBW) of a vehicle. Each master cylinder (12) has a hollow body (14), a piston (15) and a chamber (16) suitable for containing a fluid having a primary control pressure depending on a driving force applied on the piston (15) and intended to be transmitted to a utilising device (LBB, RBB). The assembly further includes a balancing duct (58) into which the chambers (16) come out, and a plurality of normally closed balancing valves (60).Type: ApplicationFiled: July 13, 2010Publication date: May 10, 2012Applicant: VHIT S.P.A.Inventors: Luigi Alberti, Leonardo Cadeddu
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Patent number: 8167381Abstract: A brake fluid pressure control device for a bar handle vehicle has a front wheel brake system which imparts a braking force to a front wheel and a rear wheel brake system which imparts a braking force to a rear wheel. At least one of the brake systems has a master cylinder which generates brake fluid pressure in accordance with an operation amount of a brake operation element, first and second wheel cylinders both of which impart the brake force on one of the front and rear wheels, a first hydraulic path which communicates the master cylinder with the first wheel cylinder, a second hydraulic path which is branched from the first hydraulic path and connected to the second wheel cylinder and a boosting unit which boosts the brake fluid pressure in the second wheel cylinder without boosting the brake fluid pressure in the first wheel cylinder.Type: GrantFiled: February 9, 2009Date of Patent: May 1, 2012Assignee: Nissin Kogyo Co., Ltd.Inventors: Motoyasu Nakamura, Takayuki Hamanaka
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Patent number: 7971941Abstract: In a dual-circuit hydraulic motorcycle brake system with two hand or foot-operated master cylinders, at the commencement of the pump operation in one of the brake circuits, the change-over valve (20) and/or the separating valve (19) of that brake circuit assume a switching position in which the pressure which can be generated by the pump (9) is prevented from causing a reactive effect on the associated hand-operated or foot-operated master brake cylinder (7, 13). To this end, the separating valve (19) in the brake line may be switched to a closed or throttling position, while the change-over valve (20) in the suction path is closed. Alternatively, both the change-over valve (20) and the separating valve (19) can be opened at the same time so that the pump conveys brake fluid in a circle.Type: GrantFiled: December 12, 2006Date of Patent: July 5, 2011Assignee: Continental Teves AG & Co. oHGInventors: Alfred Eckert, Oliver Hoffman
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Patent number: 7942482Abstract: What is disclosed is a brake system for a mobile machine, e.g., for a wheel loader, comprising two hydraulic circuits to each of which at least one respective wheel brake cylinder is associated. Control of the wheel brake cylinders is effected through a brake valve arrangement which, in accordance with the invention, is formed by two brake valves each realized with a hydraulic pilot control, wherein the braking pressure at the one brake valve is reported via a control line into a pilot control chamber of the other brake valve.Type: GrantFiled: February 27, 2004Date of Patent: May 17, 2011Assignee: Bosch Rexroth AGInventor: Hubertus Mies
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Publication number: 20100300823Abstract: A valve for balancing the braking system of a vehicle equipped with two separated master cylinders for the independent braking of the wheels situated at the two sides of the vehicle, includes two ring packings which cooperate with the intake of a transfer channel connecting both master cylinders, wherein at least one of the packings of the balancing valve is housed within a containment space suitable for allowing, in elastic conditions, a displacement of this packing that increases in noticeable manner the volume of the space which is located on the packing side communicating with the transfer channel. This packing may have a substantially usual shape, and the possibility of its displacement as a consequence of an elastic deformation of the packing may be entrusted entirely to the shape of the containment space, or a special shape of the packing itself. An elastic member brings the packing to its normal configuration when the cause of its displacement ceases.Type: ApplicationFiled: December 12, 2008Publication date: December 2, 2010Applicant: VHIT S.P.A. UNIPERSONALEInventor: Leonardo Cadeddu
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Patent number: 7802661Abstract: A brake device for a motorcycle which includes a brake caliper for parking and which favorably ensures the followability of the swing arm in response to the fluctuation of a road surface. A brake caliper for braking and a brake caliper for parking are respectively arranged separately in the vertical direction with respect to the swing arm and, at the same time, are arranged in front of the rear axle. Here, the brake caliper for parking is arranged below the swing arm and the brake caliper for braking is arranged above the swing arm.Type: GrantFiled: September 14, 2005Date of Patent: September 28, 2010Assignee: Honda Motor Co., Ltd.Inventor: Shinichiro Ishida
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Patent number: 7614708Abstract: A vehicular brake hydraulic pressure control device includes accumulators that are connected to a first brake pedal and store brake fluid with a first master cylinder at atmosphere. A first brake system is operable to apply interlock control to a front wheel brake F of a second brake system. A switching unit switches a channel of brake fluid flowing to the first hydraulic pressure output channel of the first brake system, from the first master cylinder to the accumulators when a pump is in operation.Type: GrantFiled: March 30, 2007Date of Patent: November 10, 2009Assignee: Nissin Kogyo Co., Ltd.Inventors: Tetsuo Tsuchida, Motoyasu Nakamura
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Publication number: 20090071778Abstract: A valve intended to disconnect, in specific circumstances, the braking of the front wheels, and/or of a trailer whose braking system is connected through a trailer braking valve, for the braking system of a farm tractor or similar vehicle which comprises two master cylinders, operated by two separate braking pedals, directly controlling the braking of the rear wheels, and controlling the braking of the front wheels and/or the braking device of the trailer through the disconnection valve. The disconnection valve includes a body, a first and second inlet connections connected to the two master cylinders, and a delivery connection connected to a braking circuit of the front wheels and/or to the trailer brake valve. The valve body has a bore wherein is installed one movable piston subjected to the action of pressure applied to the first inlet connection.Type: ApplicationFiled: May 10, 2007Publication date: March 19, 2009Applicant: VHIT S.P.A.Inventors: Leonardo Cadeddu, Luigi Alberti
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Publication number: 20090008199Abstract: A hydraulic motorcycle brake system includes an accommodating member for the hydraulic connection of two master brake cylinders to the front-wheel brake and rear-wheel brake having several pressure channels for the front-wheel circuit and rear-wheel brake circuit, and allowing manufacture in a simplest possible manner, and a pair of wheel brake connections connectable to the rear-wheel brake and front-wheel brake open into a lateral surface of the accommodating member, the wheel brake connections being arranged between a pair of pressure connections that are connectable to the two master brake cylinders.Type: ApplicationFiled: September 28, 2005Publication date: January 8, 2009Inventors: Axel Hinz, Gunther Vogel
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Patent number: 7461905Abstract: The invention relates to an integral brake for a motorbike. The integral brake is designed in such a way that if the footbrake lever or the handbrake lever is additionally activated after the footbrake lever or the handbrake lever is already activated, an optimum distribution—corresponding to the aimed-at increased deceleration of the motorbike—of the braking forces applied to the front and rear wheels is brought about without influencing the pressure prevailing in the handbrake cylinder.Type: GrantFiled: October 12, 2005Date of Patent: December 9, 2008Assignee: Continental Teves Ag & Co. OHGInventors: Markus Hamm, Juergen Woywod
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Patent number: 7448697Abstract: A tractor braking device has a first hydraulic circuit for activating a rear left brake and a second hydraulic circuit for activating a rear right brake. Simultaneous activation of both hydraulic circuits actuates at least one front brake in addition to at least one rear brake.Type: GrantFiled: July 15, 2005Date of Patent: November 11, 2008Assignee: CNH America LLCInventor: Emiliano Brancolini
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Publication number: 20080223675Abstract: A brake system includes a master cylinder which generates brake fluid pressure by a braking operation of a driver, an electric motor-driven slave cylinder which generates brake fluid pressure based on an electric signal responsive to a braking operation of a driver, and a wheel cylinder for braking a wheel by the brake fluid generated in the master cylinder or slave cylinder. During normal operation of the brake system, the brake fluid generated in the slave cylinder is transferred to the wheel cylinder. During abnormal operation of the brake system, the brake fluid generated in the master cylinder is transferred to the wheel cylinder. The brake system also includes an opening and closing valve in a fluid passage connecting the slave cylinder to the wheel cylinder. When a problem occurs with the slave cylinder, the opening and closing valve is closed for a predetermined amount of time.Type: ApplicationFiled: March 11, 2008Publication date: September 18, 2008Applicant: Honda Motor Co., Ltd.Inventor: Kunimichi Hatano
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Publication number: 20080164113Abstract: A braking system for a vehicle having two pairs of wheels, has two master cylinders operating as pumps, wherein each master cylinder is operated by its own brake pedal and controls the braking on one rear wheel, as well as on the front wheels through a valve for the disconnection of the front vehicle braking. Each master cylinder is of the tandem type including two sections, the first section controlling the braking of the front wheels through the valve, whereas the second section controls the braking of that rear wheel, being a part of the pair of rear wheels, which is associated with the master cylinder. The first sections of both master cylinders are supplied by a first oil reservoir and the second sections of both master cylinders are supplied by a second oil reservoir at least partially independent from the first oil reservoir.Type: ApplicationFiled: March 20, 2006Publication date: July 10, 2008Applicant: VHIT S.P.A.Inventors: Leonardo Cadeddu, Luigi Alberti
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Patent number: 7182353Abstract: A turn brake includes a cylinder assembly coupled to a conventional front-wheel steering system of a multi-track vehicle. The cylinder assembly generates fluid power for applying differential braking force to left and right wheels of the vehicle in response to turning of a steering wheel of the steering system, thereby compensating for a loss of steering traction. Pressure generated in the cylinder assembly can exert a reaction force on the steering wheel to provide tactile feedback to the driver, which may help to avoid oversteer. An optional shutoff mechanism may be provided for selectively disabling or disconnecting the turn brake.Type: GrantFiled: November 26, 2002Date of Patent: February 27, 2007Assignee: Divers Contracting Services, Inc.Inventor: Ross Divers
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Patent number: 7168536Abstract: The present invention relates to a tandem master cylinder including two plunger pistons and its object is to design the cylinder as simple as possible and to render its assembly as economical as possible. This object is achieved by inserting circumferential annular grooves directly into the housing of the master cylinder in order to accommodate sealing sleeves, namely both the primary seal and, in an improvement of the invention, the primary seal of the piston at the end of the push rod as well as the secondary seals of both pistons. Collecting annular grooves at the level of the connecting outlets for the compensating reservoir are further favorable aspects of the invention.Type: GrantFiled: July 21, 2001Date of Patent: January 30, 2007Assignee: Continental Teves AG & Co. oHGInventor: Hans-Jörg Feigel
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Patent number: 6984000Abstract: A tank intended for an electrohydraulic braking system comprises, according to the present invention, a first chamber (7) for the supply of a primary hydraulic circuit of a master cylinder with brake fluid, a second chamber (9) for the supply of a secondary hydraulic circuit of the master cylinder (not shown) with brake fluid, a third chamber (11) for the supply of a hydraulic pump with brake fluid, and a fourth chamber (13), a measuring one, which accommodates a detection device, indicating when the brake-fluid level inside the tank is too low. The tank has a flow path for the interconnection of the first chamber (7), the second chamber (9) and the third chamber (11) when the hydraulic-fluid level is higher than a safety level, and for the fluid-tight separation of said chambers when the hydraulic-fluid level is lower than the safety level.Type: GrantFiled: October 23, 2002Date of Patent: January 10, 2006Assignee: Robert Bosch GmbHInventors: Emmanuel Fraisse, François Gaffe, Philippe Come, Jean-Pierre Delage
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Patent number: 6929104Abstract: A dual circuit pilot master cylinder for a full power brake system provides a minimally sized package for installation in a vehicle cab interior. The master cylinder utilizes a side-by-side disposition of the primary and secondary cylinders and a brake pedal linkage to the pistons allowing flexibility in location of the device.Type: GrantFiled: September 25, 2003Date of Patent: August 16, 2005Assignee: International Truck Intellectual Property Company, LLCInventor: James A. Thomas
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Publication number: 20040011614Abstract: The present invention relates to a tandem master cylinder (20) including two plunger pistons (2, 4) and its object is to design the cylinder as simple as possible and to render its assembly as economical as possible. This object is achieved by inserting circumferential annular grooves (16 to 19) directly into the housing (15) of the master cylinder (20) in order to accommodate sealing sleeves, namely both the primary seal (6) and, in an improvement of the invention, the primary seal (7) of the piston at the end of the push rod as well as the secondary seals (12, 14) of both pistons (1, 3). Collecting annular grooves (45, 46) at the level of the connecting outlets for the compensating reservoir (5, 10) are further favorable aspects of the invention.Type: ApplicationFiled: March 28, 2003Publication date: January 22, 2004Inventor: Hans-Jorg Feigel
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Patent number: 6616246Abstract: In an hydraulic braking system for vehicles a pedal-operated booster-assisted hydraulic master cylinder assembly (1) is adapted to apply a vehicle brake (2) by the supply of hydraulic fluid under pressure to a brake actuator for operating the brake, and a proportional valve (50) is arranged to provide a quick-fill function for the brake actuator in response to a proportional pilot signal (40) from the master cylinder assembly.Type: GrantFiled: June 11, 2001Date of Patent: September 9, 2003Assignee: Arvin Meritor, Inc.Inventors: Michael Williamson, Mark Batchelor