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| Number | Title | Issue Date |
| 7354116 | Vehicle brake hydraulic pressure generator In a brake hydraulic pressure generating device in which the brake operating force is applied to a pressure adjusting valve through a stroke simulator and the hydraulic pressure supplied from the hydraulic pressure source is adjusted to a value corresponding to the ... | 04/08/2008 |
| 7302796 | Hydraulic brake booster An hydraulic brake booster for an automobile hydraulic system comprising of a boost cylinder, a boost piston and a boost chamber defined by a boost piston working in a bore in a body and being adapted to apply an output force to an output rod in response to a pressu... | 12/04/2007 |
| 7073875 | Brake fluid circulation A brake circuit has a brake connected with a master cylinder via a brake application line. The brake master cylinder has a first chamber in which brake fluid is pressurized on movement of a first piston in a brake applying direction by an operating device. The first... | 07/11/2006 |
| 7052094 | Vehicle brake system A vehicle brake system includes a master cylinder having a housing defining a bore therein. A boost piston and a primary piston are slidably disposed in the bore. The master cylinder has a boost chamber defined at least in part by the boost piston and the housing. T... | 05/30/2006 |
| 6729132 | Remotely and directly pedal operated hydraulic compact booster for bi-directional braking A bi-directional braking assembly for a vehicle includes a hydraulic booster assembly for applying proportional fluid pressure to a brake assembly and is actuated by a forward pedal. A master cylinder actuated by a rear pedal communicates fluid to the hydraulic boos... | 05/04/2004 |
| 6606859 | Master cylinder A master cylinder (12,212) including a housing (40,40a) with a bore (42,42a) for retaining a piston assembly (100,200) to define a first chamber (54) that is connected to wheel brakes (14,14') in a first brake circuit and a second chamber (56) that is con... | 08/19/2003 |
| 6415605 | Brake system A brake system including an intensifying arrangement which allows a master cylinder pressure to be intensified by feeding a discharge pressure from a pump to an intensifying chamber. The brake system includes a master cylinder having a primary piston, on ... | 07/09/2002 |
| 6367254 | Master cylinder A master cylinder which includes a primary piston and a thrust piston disposed within a housing, and defines an intensifying chamber at a location rearward of the thrust piston. An input shaft has a front end which is disposed within the intensifying cham... | 04/09/2002 |
| 6161380 | Hydraulic pressure boosting apparatus A booster 3 has a structure that a return valve 14 is formed into a two-step throttle incorporating a first throttle valve 36 and a second throttle valve 37 formed continuously from the first throttle valve 36. When a valve spool 28 has been moved forward... | 12/19/2000 |
| 5735124 | Internally boosted master cylinder A brake system for use in connection with a vehicle including a hydraulic internally boosted master cylinder, a hydraulic pump, and hydraulic brakes wherein the master cylinder controls hydraulic fluid pressure to the brakes and has a primary or sensing p... | 04/07/1998 |
| 5079990 | Hydraulic pressure booster The invention relates to a hydraulic pressure booster which can be used to perform servo control of input and output at the preset servo ratio in, for example, a brake booster. In particular, the invention relates to a hydraulic pressure booster, which is... | 01/14/1992 |
| 5076056 | Enhanced pneumatic brake system In a brake system (10) having a fluid pressure servomotor (12) with a housing having an operational chamber (30) connected to an intake manifold (102) of a vehicle and a control chamber (32) connected to an accumulator (50). A wall (28) which separates th... | 12/31/1991 |
| 4899640 | Hydraulic booster A hydraulic booster has a boost piston (19) which receives the thrust of boost pressure generated in a boost chamber (15) to move the boost piston for urging a master piston (12) of a master cylinder in a brake applying direction. An input member (17) is ... | 02/13/1990 |
| 4887869 | Hydraulic braking system A pair of spaced apart large-diameter and small-diameter lands between which a fluid chamber is defined are formed on a second piston in a tandem cylinder to which an anti-skid device is added. Booster pressure is applied to the fluid chamber to act on th... | 12/19/1989 |
| 4850655 | Hydraulic booster A hydraulic booster including a power piston, a booster chamber for applying a boost pressure to the power piston, an input rod, an intermediate inlet chamber for introducing a power source pressure thereinto, a valve mechanism provided in a valve chamber... | 07/25/1989 |
| 4793660 | Hydraulic brake system for automotive vehicles A hydraulic brake system for automotive vehicles has a master brake cylinder connected to an unpressurized reservoir and a brake line connected to a working chamber of the master brake cylinder and leading to pressure control valves of a brake slip contro... | 12/27/1988 |
| 4753074 | Braking pressure generator for an automotive vehicle's hydraulic brake system A braking pressure generator consists of a hydraulic brake booster (2) actuatable by a brake pedal (16) and of a master brake cylinder (1) whose master cylinder piston (19) is actuatable by a booster piston (14) pressurizable with an auxiliary hydraulic p... | 06/28/1988 |
| 4741160 | Hydraulic multiple-circuit brake system A hydraulic multiple-circuit brake system is proposed, the brake amplifier of which has a multiple-chambered refill container. With an intake connection of its pump, an energy supply apparatus comprising a pump and a reservoir is connected at a predetermi... | 05/03/1988 |
| 4724674 | Hydraulic brake booster The hydraulic brake booster (12) includes a resilient member (96) disposed between an input member (94, 194, 294) and a pair of valve members (98, 101; 112) which control fluid pressure flow from an accumulator (14). When the input member (94, 194, 294) i... | 02/16/1988 |
| 4685297 | Hydraulic brake booster with quick take-up and full stroke The brake booster (12) includes a housing (30) with at least one piston (38) disposed in a bore (32) to separate a pressure chamber (42) from a work chamber (76). The piston (38) abuts a valve housing (79) containing therein a valve assembly (80) and the ... | 08/11/1987 |
| 4660381 | Hydraulic booster with electrically driven plunger pump A hydraulic booster including an input piston adapted to be actuated by a manually operated member such as a brake pedal. The input piston is axially slidable in a power piston which is in turn axially slidable in a booster casing. The power piston divide... | 04/28/1987 |
| 4603918 | Hydraulic dual-circuit tandem master brake cylinder A hydraulic dual-circuit tandem master brake cylinder intended for use in brake systems of motor vehicles is proposed, to which a closed brake circuit (I) and an open brake circuit (II), the latter reinforced by auxiliary pressure, are connected. In order... | 08/05/1986 |
| 4559780 | Power valve for a vehicle braking system A power valve for a vehicle braking system includes a main pressure chamber (4) defined between the body (1) and spool (2) and connected to the outlet (5), the spool being displaceable under an input effort to close communication between the chamber (4) a... | 12/24/1985 |
| 4489555 | Hydraulic dual-circuit brake booster A hydraulic dual-circuit brake booster in which two brake circuits are closed brake circuits. A dual-circuit tandem main cylinder is used in combination with a pedal push rod supported in a displaceable piston and exposed to the brake pressure directed in... | 12/25/1984 |
| 4483144 | Control arrangement for a hydraulic brake system with an antiskid control device An arrangement for controlling the supply of pressurized hydraulic fluid from a master cylinder and from a pressure source into hydraulic circuits leading to wheel brake actuating cylinders includes a valve device including a control piston acted upon by ... | 11/20/1984 |
| 4463561 | Braking-force booster A braking-force booster which contains a pressure source, a pedal operated control valve and at least one main brake cylinder; a piston which creates the brake pressure, is exposed to the pressure created in the main brake cylinder by means of the control... | 08/07/1984 |
| 4458490 | Dual power brake booster and method of generating brake actuating pressure A dual power brake booster assembly in which the hydraulic boost section is initially operated, the vacuum booster section is then operated to runout while the hydraulic section maintains a hydraulic boosted force level, the hydraulic section is then furt... | 07/10/1984 |
| 4444440 | Hydraulic boosters for vehicle braking systems An hydraulic booster has a housing provided with an input member, a boost piston, an output member, and connections to a source of pressure and a fluid reservoir. A force applied to the input member is transmitted to the output member and augmented by the... | 04/24/1984 |
| 4443040 | Hydraulic boosters for vehicle braking systems In an hydraulic booster for a vehicle braking system a boost piston provides an output force in response to pressurization of a boost chamber under the control of a boost valve mechanism, which controls communication between the boost chamber and a pressu... | 04/17/1984 |
| 4441319 | Brake booster A brake booster is provided with a housing (30) having a bore (32) therein receiving a piston (52) carrying a valve assembly (68). An end plug (50) cooperates with the piston (52) to form a work chamber (66) and an input member (84) extends through the en... | 04/10/1984 |
| 4407643 | Power fluid system embodying two-fluid pump A power fluid system for a vehicle embodying a two-fluid pump which utilizes an existing source of fluid under pressure is provided. The existing source of fluid enables a second source of fluid under pressure to be established through the two-fluid pump.... | 10/04/1983 |
| 4387569 | Hydraulic brake booster A hydraulic brake booster which has an input valve control member acting through a controlled rate spring and through a lever pivoted on the booster housing in the power chamber to move a spool valve in a bore parallel to the power piston so that the inpu... | 06/14/1983 |
| 4378676 | Booster for a hydraulic clutch system An air/hydraulic servomotor unit for providing power assistance for a clutch hydraulic operating system and comprising a compressed air cylinder, a hydraulic slave cylinder, a load proportioning means that determines what ratio of the unit output is deriv... | 04/05/1983 |
| 4362019 | Motor vehicle hydraulic system A motor vehicle provided with servo-assisted controls for the brakes and steering, has an hydraulic system of the type comprising a volumetric pump the input of which is connected to a reservoir, and first and second distributor devices the first of which... | 12/07/1982 |
| 4353209 | Hydraulic brake booster A hydraulic brake booster (10) includes a spring-balanced control valve (42) communicating pressurized fluid to a pressure chamber (14) in response to an operator input. The magnitude of the fluid pressure communicated to the pressure chamber (14) is a fu... | 10/12/1982 |
| 4254623 | Hydraulic control system for brake device A hydraulic control system for a brake device comprises independent first and second brake circuits, the first circuit communicating with a first chamber pressurized by movement of a master piston actuated by a brake pedal, and the second circuit communic... | 03/10/1981 |
| 4253496 | Heavy duty power valve A brake valve is disclosed, which is provided with an enlarged chamber, at one end of which is slidably disposed an annular piston. A reaction piston is carried on a valve rod; the reaction piston radially extends so as to cover the annular piston. When t... | 03/03/1981 |
| 4223533 | Device for the power-assisted control of a hydraulic transmitter A device for the power-assisted control of a hydraulic transmitter is disclosed which includes a transmitter cylinder having a first and second bore provided therein, a main piston with a bore hole, disposed in the cylinder, valve means disposed in the bo... | 09/23/1980 |
| 4208950 | Hydraulic power brake booster A hydraulic brake booster having a mechanical ratio changing mechanism between the booster input rod and one of the booster valve control members. The mechanism includes reaction levers pivotally mounted on the input valve control member and on a support ... | 06/24/1980 |
| 4203631 | Hydraulic servo-assisted braking system for motor vehicles A hydraulic servo-assisted braking system for motor vehicles has a master cylinder controlling two independent braking circuits through respective auxiliary cylinders each having an auxiliary piston with a central bore and an associated servo-piston with ... | 05/20/1980 |
