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| Number | Title | Issue Date |
| 7430864 | Master cylinder and method of mounting stopper plate A master cylinder includes primary and secondary pistons both slidably mounted in the cylinder bore of a cylinder. A stopper plate is disposed in the cylinder bore behind the secondary piston. A groove having a larger diameter than the piston sliding surfaces is for... | 10/07/2008 |
| 7267088 | Valve-driving system of internal combustion engine A valve-driving system which is applied to an internal combustion engine having a plurality of cylinders for driving an intake or exhaust valve provided in each cylinder, including a plurality of valve-driving apparatuses provided for driving valves of different cyl... | 09/11/2007 |
| 7267040 | Booster with reduced dead travel and a braking system comprising such a booster A pneumatic brake booster with short actuating travel, comprising a skirt and a pneumatic piston that are rigidly connected and slideably mounted in a sealed casing to delimit a low-pressure chamber and a variable-pressure chamber and a three-way valve arrangement t... | 09/11/2007 |
| 7159696 | Hydraulic braking pressure generating apparatus for vehicles A pressure generating apparatus includes a first piston moved in response to operation of a brake pedal, an elastic member for providing a stroke of the first piston in response to braking operation force of the brake pedal, a second piston accommodated in a housing... | 01/09/2007 |
| 6984002 | Brake hydraulic pressure generator A brake hydraulic pressure generator is proposed in which the brake stroke fluctuate less when the amount of brake fluid consumed in the wheel brakes fluctuates. Even when the brake pedal force is increased after the brake assisting force has reached its maximum, th... | 01/10/2006 |
| 6966616 | Hydraulic brake apparatus for a vehicle A hydraulic brake apparatus is provided with a master cylinder, an assisting device for assisting the master piston to be advanced in response to operation of a brake pedal, and an auxiliary piston having a large diameter portion and a small diameter portion to defi... | 11/22/2005 |
| 6804960 | Fuse device for pneumatic brake booster A fuse device for a pneumatic brake booster, characterized by a hollow cylindrical first part (21) with a first end (25) having an inside diameter (d1) and a bowl-shaped second part (24) with a circular bottom equipped on its central exte... | 10/19/2004 |
| 6789857 | Vehicle brake hydraulic pressure generator An improved brake hydraulic pressure generating device is provided in which the hydraulic pressure supplied from a hydraulic pressure source is adjusted to a value corresponding to the brake operating force by means of a pressure adjusting valve which is activated a... | 09/14/2004 |
| 6732519 | Pressure holding valve and vehicle braking device using the same A pressure-responsive type pressure holding valve is proposed which serves to hold the hydraulic pressure in a circuit connected to a spool valve. A piston valve biased by a spring is mounted in a housing formed with a valve chamber, a small-diameter bore and a larg... | 05/11/2004 |
| 6434934 | Brake fluid pressure generating apparatus The object of the present invention is to provide a brake fluid pressure generating apparatus which has a master cylinder with supplemental pressure room which operates the master cylinder independently of a depression of a brake pedal without structure c... | 08/20/2002 |
| 6431662 | VEHICLE BRAKING PRESSURE SOURCE DEVICE WHEREIN FLUID COMMUNICATION BETWEEN PRESSURIZING AND BACK-PRESSURE CHAMBERS OF MASTER CYLINDER IS CONTROLLED BASED ON VEHICLE RUNNING STATE AND/OR ROAD SURFACE CONDITION A vehicle braking pressure source device including (a) a master cylinder having a pressurizing piston cooperating with a cylinder housing to define a pressurizing chamber and a back-pressure chamber on front and rear sides of the piston, and an input rod ... | 08/13/2002 |
| 6408738 | Assisted braking system with emergency braking function The brake force booster 1 with panic brake function includes a control valve, which is arranged in a control housing and operable by way of an input member, for controlling the boosting pressure in a working chamber, the said control valve including an at... | 06/25/2002 |
| 6324845 | Self contained, supplemental vacuum assist unit for vehicle brake booster A self contained, supplemental vacuum assist unit is provided for use with a vacuum brake booster and a source of vacuum in a motor vehicle. The unit includes, within a single housing, an electric motor, an air pump driven by the motor, a manifold definin... | 12/04/2001 |
| 6295919 | Reinforced impact-embrittled braking device A braking device having a flange (21) of master cylinder (2) secured to a pneumatic booster (1) by a nut (3) screwed onto a through-bolt (13) that extends through a front shell (111) and a rear shell (112). The through-bolt (13) has a threaded front end (... | 10/02/2001 |
| 6205783 | Reservoir assemblies for hydraulic vehicle braking systems A reservoir assembly for a vehicle hydraulic braking system includes two chambers (2, 3) for the storage of hydraulic fluid. The reservoir assembly is provided with a structure for increasing the effective volume of one of the chambers (2), for example a ... | 03/27/2001 |
| 6192685 | Master cylinder for motor vehicle electro-hydraulic braking installation A master cylinder (32) in a vehicle hydraulic braking installation uhydraulic-fluid supply device for actuating wheel brake cylinders (20). The master cylinder (32) being isolated from the wheel brake cylinders (20) by at least one shut-off valve (30). Th... | 02/27/2001 |
| 6142584 | Brake system having a plurality of operational sources A brake system (10) having a control member (12) through which a remotely located master cylinder (18) is selectively supplied with either a first operational fluid developed by a first pump (14), a second operational fluid developed by a second pump arra... | 11/07/2000 |
| 6109164 | Brake device for automobile A push rod of a vacuum booster includes an inner rod section, a pipe-shaped outer rod section which is slidably fitted over an outer periphery of a rear portion of the inner rod section and connected to a brake pedal, and a buffer member made of a synthet... | 08/29/2000 |
| 6079209 | Hydraulic power conversion device A hydraulic power conversion device includes a main oil container having an inlet for supplementing hydraulic oil, a pair of hydraulic pumps connected to the main oil container, a motor drivingly connected with the hydraulic pumps, a twin-circuitry hydrau... | 06/27/2000 |
| 6058705 | Hydraulic brake system The invention relates to a hydraulic brake system having a tandem master cylinder as the brake force set-point value transducer for braking by external force, downstream of which are disconnection valves for hydraulically disconnecting the master cylinder... | 05/09/2000 |
| 6052994 | Hydraulic brake apparatus for a vehicle The present invention is directed to a hydraulic brake apparatus for applying braking force to each wheel of a vehicle in response to depression of a brake pedal. An auxiliary pressure source is provided for pressurizing the brake fluid in the reservoir t... | 04/25/2000 |
| 5941071 | Boosted braking device with hydraulic reaction and improved safety A boosted braking device for a motor vehicle having a master cylinder (200) and a pneumatic booster (100). The master cylinder (200) is equipped with a primary piston (30) which receives an actuating force to increase pressure in a primary hydraulic circu... | 08/24/1999 |
| 5924284 | Hydraulic boosting device In a hydraulic boosting device of the present invention, when the pressure stored in an emergency accumulator is less than a set pressure, a stepped piston 70 moves downward, a throttle valve 72 is set in a first position where the throttle valve 72 is se... | 07/20/1999 |
| 5865510 | Brake pedal actuator for motor vehicle and actuation unit therefor A brake pedal (1) for actuation of a brake cylinder (10) of a motor vehicle, comprises a lever (2), having at an end portion of one lever (3) a stepping plate (4) for actuation by a driver, and an articulation location (5) for introducing actuation forces... | 02/02/1999 |
| 5839280 | Fluid-mechanical actuator having a piston with two sections A fluid-mechanical actuator has a cylinder housing and a piston which is guided movably in the cylinder housing. A working chamber can be filled with a fluid and is bounded by the cylinder housing and the piston. By filling the working chamber with fluid,... | 11/24/1998 |
| 5778673 | Brake cylinder means for a motor vehicle A brake cylinder means (1) for a motor vehicle, comprises a cylinder/piston means (2) adapted to be operated by a brake pedal means for generating pressure in a hydraulic brake system of the motor vehicle, characterized in that the cylinder/piston means (... | 07/14/1998 |
| 5577384 | Back-up pressure intensifier for master cylinder failure A braking unit includes an intensifier mechanism for intensifying a braking liquid pressure of a master cylinder upon failure of a liquid pressure booster. The braking unit comprises the intensifier mechanism for intensifying the braking liquid pressure o... | 11/26/1996 |
| 5431015 | Flexible bellows actuation system A closed loop fully self-contained actuation system for converting a mechanical input motion into a mechanical output motion, which actuates a device such as a flight control surface on an aircraft, comprises an input actuator including a first fluid pres... | 07/11/1995 |
| 5332302 | Master cylinder low/high pressure combination valve which operates independently of brake pedal position A brake pressure control device (1) is described in which a low-pressure valve (19) and a high-pressure valve (29) are both actuatable by a brake pedal, resulting in a brake circuit (36) being connectible alternatively either to a reservoir (23) or to a p... | 07/26/1994 |
| 5287700 | Flexible bellows actuation system A closed loop fully self-contained actuation system for converting a mechanical input motion into a mechanical output motion, which actuates a device such as a flight control surface on an aircraft, comprises an input actuator including a first fluid pres... | 02/22/1994 |
| 5185999 | Hydraulic brake booster and valve members A hydraulic brake booster (10) includes a housing (12) which defines a pressure chamber (16) and a piston (18) within the housing (12) is movable in response to pressurized fluid within the pressure chamber (16) to effectuate a brake application. The pist... | 02/16/1993 |
| 5065573 | Hydraulic power booster including backup actuator in addition to lever device, for booster control valve A hydraulic power booster having a lever device disposed in operative association with a reaction piston, a power piston and a valve spool, for moving the valve spool in one of opposite axial directions thereof for applying a pressure of a pressure source... | 11/19/1991 |
| 5052182 | Hydraulic brake booster system with check valve in brake fluid reservoir line A tandem master brake cylinder has first and second pistons, each piston associated with a fluid chamber and a pressure chamber. The pistons are displaced in response to actuation of a brake pedal. A hydraulic booster is coupled to a power source and is o... | 10/01/1991 |
| 5036665 | Hydraulic brake booster The hydraulic brake booster (12) of the present invention comprises a full power hydraulic brake booster (12) that provides false travel during full power operation and improved pedal feel during manual operation. The booster (10) has a housing (24) with ... | 08/06/1991 |
| 5031968 | Electronically controlled brake device An electronically controlled brake device for controlling a brake pressure according to a manual input. While the dynamic pressure line is functioning normally, the dynamic pressure acts on one end of a push rod associated with a brake pedal to give such ... | 07/16/1991 |
| 5027598 | Assembly composed of a pneumatic booster, a master cylinder and a reservoir having vacuum supply passage incorporated within The assembly is composed of a vacuum pneumatic booster (1), a master cylinder (3) and a reservoir (5) of fluid under low pressure which feeds the master cylinder, and is intended to convert a force exerted on a control pedal into a fluid pressure supplyin... | 07/02/1991 |
| 4918921 | Coaxial push rod and hollow screw ball nut drive for master cylinder An electrically driven master cylinder assembly and various vehicle control systems utilizing the master cylinder assembly. Several forms of master cylinder assemblies are disclosed. In the preferred form, the assembly includes an electric DC motor direct... | 04/24/1990 |
| 4914917 | Brake actuating device for automotive vehicles A brake actuating device for automotive vehicles comprises a hydraulic brake force booster and a hydraulic tandem master cylinder to which pressure is applied by the brake force booster and which is in communication with the hydraulic wheel brake circuits... | 04/10/1990 |
| 4858438 | Hydraulic booster device for braking circuit The hydraulic booster device controls a ball valve (25) to establish a communication between a source of fluid at high pressure (35) and a braking circuit (29) during a normal braking. In the event of failure of the high pressure source (35), the braking ... | 08/22/1989 |
| 4858737 | Hydraulic braking device for automobile vehicle The device comprises a tandem master cylinder, a booster high pressure fluid distributor, 2, a valve mechanism 4 to interconnect the master cylinder and the distributor selectively to a braking circuit. The high pressure circuit is connected to the pipeli... | 08/22/1989 |
