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| Number | Title | Issue Date |
| 7857113 | Hydraulic clutch control system, comprising servo means which are disposed between the master cylinder and the slave cylinder of the system The invention relates to a system for the hydraulic control (10) of a clutch (12), e.g. a motor vehicle clutch, comprising an upstream master cylinder (14) which is connected to a down-stream slave cylinder (18) by means of a conduit (... | 12/28/2010 |
| 7442457 | Fuel cell system with compressor and also a method for operating such a fuel cell system A fuel cell system comprising a plurality of fuel cells combined together to form a fuel cell stack, with the fuel cell stack having an anode side with an inlet for a fuel and an outlet for non-consumed fuel and exhaust gases arising at the anode side as well as a c... | 10/28/2008 |
| 7159704 | Hydraulic system A hydraulic system in a motor vehicle for operating a friction clutch is described, including a slave cylinder acting upon a spring plate of the clutch, and a manually or automatically operated master cylinder acting upon the slave cylinder. The hydraulic system inc... | 01/09/2007 |
| 7043911 | Vehicle braking system master cylinder A master cylinder suitable for a vehicle braking system has an unusual capability to supply quantities of fluid and fluid pressures at its output in differentiated manner in dependence on the braking stage, preventing long transitory stages between an approach stage... | 05/16/2006 |
| 6928813 | Stroke gain device for a master cylinder A master cylinder wherein an input force applied to a bearing assembly pushes and rotates an input piston into a bore of a housing through the engagement between a helical groove on its outer surface and a pin on the housing to act on a primary piston in the bore th... | 08/16/2005 |
| 6655139 | Servomotor with a finger-forming locking sleeve A pneumatic servomotor for an assisted braking of a motor vehicle having a unidirectional clutch device (56). The clutch device (56) has a coaxial sleeve (58) that slides on a plunger (46), and a substantially ring-shaped key (60) that is arranged with a ... | 12/02/2003 |
| 6363720 | Master cylinder for automotive vehicle A master cylinder having variable input/output characteristics includes a cylinder body in which is formed a cylinder bore and a piston fitted in the cylinder bore and movable upon brake operation. The piston is divided into a front portion and a rear por... | 04/02/2002 |
| 6295813 | Press driven tool actuator module For a hydraulically actuated device a hydraulic power cylinder with an actuator slidably received for reciprocation within the cylinder and a piston slidably received for reciprocation within a sleeve of the actuator and defining a gas chamber on one side... | 10/02/2001 |
| 6282896 | Idle stroke shortening device in brake system A brake system 1 of the invention comprises a brake pedal 2, a booster 3 which boosts the input force applied by the brake pedal 2 and outputs the boosted force, a travel amplifying mechanism 4 which amplifies the travel of an output shaft of the booster ... | 09/04/2001 |
| 6231135 | Hybrid brake system A hybrid brake system for a vehicle propelled at least by a rotating electric motor powered by a storage battery and in communication with at least one ground-engaging wheel. The hybrid brake system includes a vehicle braking control device and an electri... | 05/15/2001 |
| 6195995 | Hydraulic brake system with device for active braking Hydraulic Brake System with a Device for Active Braking In order to enable a hydraulic brake system which has a self-priming return pump (14) to quickly fill the wheel brakes (5) in an active braking operation, the present invention discloses the provisio... | 03/06/2001 |
| 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 |
| 5916141 | Tandem master cylinder of brake system in an automobile A tandem master cylinder comprising first and second oil chambers having first and second pistons and first and second springs disposed in each of said respective chambers, the second piston being connected with a hydraulic push rod; a bypass chamber; and... | 06/29/1999 |
| 5649424 | Two-stage pressure cylinder A two-stage pressure cylinder having a work cylinder (17,100) with a work piston (18,108), and piston rod (20,110) for contact with a work piece, in which the work piston is movable, an oil cylinder (56,116) to contain hydraulic fluid (H), an oil piston (... | 07/22/1997 |
| 5396771 | Apparatus for transmitting hydraulic pressure A hydraulic pressure transmitting apparatus for energizing power cylinders of the kind useful in moving load-carrying platforms on vehicles or the like, being of extremely compact structure on account of a manifold constituted by an end section of a cylin... | 03/14/1995 |
| 5086688 | Hydraulic booster device with valve means for damping of input rod The hydraulic booster device for a brake circuit, comprises a body (30) pierced with a bore (32), in which slide coaxially a pusher (25) controlled by a brake pedal and a piston means (34) located between first (5) and second (33) chambers containing a br... | 02/11/1992 |
| 5079914 | Hydraulic brake system with fast-fill valve A hydraulic brake system comprising a master brake cylinder (10), a brake force booster (12) and a filling chamber (38) by means of which in the initial phase of a brake actuation the brake system on relatively short pedal travel is rapidly filled with hy... | 01/14/1992 |
| 5036664 | Fluid pressure actuator with removable piston and cartridge unit A fluid pressure actuator according to the invention is suitable for use as a master cylinder for a vehicle brake or clutch system. The actuator includes a housing having a bore extending therethrough and at least a primary piston movably disposed within ... | 08/06/1991 |
| 4874207 | Hydraulic braking system for an automotive vehicle A hydraulic braking system for an automotive vehicle having a power source for generating a hydraulic power pressure, a reservoir, a master cylinder, a regulator and a plurality of wheel brake cylinders for braking respective road wheels, which are divide... | 10/17/1989 |
| 4729609 | Slip-controlled brake system with fast-fill cylinder For attaining an abrupt change in ratio, in a slip-controlled brake system for automotive vehicles, the chamber (11) of a fast-fill cylinder (4) is connected to a plunger chamber (41) of the braking pressure generator (1) which is acted upon by the booste... | 03/08/1988 |
| 4671066 | Hydraulic power booster A hydraulic power booster, for the actuation of a master cylinder in an automotive vehicle brake system, in which a booster piston and a brake valve are essentially arranged in parallel with the booster piston. In dependence on the actuation force applied... | 06/09/1987 |
| 4667466 | Quick fill type master cylinder An improved quick fill type master cylinder having a structure in which a piston consisting of a smaller diameter piston portion and a larger diameter piston portion is slidably fitted into a stepped cylinder bore to define a hydraulic pressure chamber as... | 05/26/1987 |
| 4659152 | Hydraulic brake system with slip control A vehicle hydraulic brake system with slip control, wherein a master cylinder (2) is pressurizable by a hydraulic poser booster (1). Valve means (23, 24, 29, 28, 32, 33, 34, 35) are inserted between the master cylinder (2) and the wheel brakes (25, 26, 30... | 04/21/1987 |
| 4642989 | Hydraulic power booster The present invention relates to a hydraulic power booster, in particular for the actuation of a master cylinder in an automotive vehicle brake system, wherein there is a booster piston and a brake valve arranged essentially in parallel to the booster pis... | 02/17/1987 |
| 4643488 | Hydraulic vehicle servo brake A hydraulic vehicle servo brake comprises a master cylinder (11) accommodating at least one stepped main-piston assembly (12). A booster piston (12') is provided which is acted upon by a controlled pressure with the controlled pressure being delivered by ... | 02/17/1987 |
| 4474004 | Power-operated boosters A pedal-operated booster incorporates a valve mechanism for controlling pressurization of a boost chamber. The valve mechanism comprises a pedal-operated piston and a pressure-responsive valve spool which is coupled to the piston for limited relative move... | 10/02/1984 |
| 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 |
| 4455830 | Master cylinder A master cylinder includes a sleeve (31) which defines fixed positions for a pair of seals (30, 32). A pair of pistons (36, 38) cooperate with the seals (30, 32) to form pressure chambers (40, 42) which communicate fluid pressure to brake circuits during ... | 06/26/1984 |
| 4455831 | Differential master cylinder A differential master cylinder adapted for use as fluid pressure generating source in a brake system comprises a cylinder body having a stepped cylinder formed therein; a stepped piston arranged to be slidable within the stepped cylinder; a first chamber ... | 06/26/1984 |
| 4294071 | Hydraulic booster travel ratio check valve The present invention is an improved hydraulic booster in which there is a ratio chamber between a power piston and a slave piston. The ratio chamber communicates with a low pressure fluid source through a check means which allows fluid from the low press... | 10/13/1981 |
| 4274521 | Synchronized hydropneumatic control of clutch and gearbox The object of the invention is a synchronized hydropneumatic control of clutch and gearbox. In accordance with the invention a hydropneumatic servomotor clutch control has been provided which includes a jack the piston of which is assisted by a pneumatic ... | 06/23/1981 |
| 4254624 | Two-stage master cylinder and valve member therefor A two-stage master cylinder includes a housing with a stepped bore for receiving at least one piston. The one piston cooperates with the housing to substantially define a primary chamber communicating with a brake circuit and an auxiliary or fast- fill ch... | 03/10/1981 |
| 4229940 | Hydraulic master cylinder A twin-piston (e.g. tandem) master cylinder is provided for a split braking system having disc brakes on some wheels of a vehicle and drum brakes on others. A delay valve is incorporated in the master cylinder for the supply to the disc brakes, the delay ... | 10/28/1980 |
| 4175791 | Hydraulic brake pressure control apparatus for motor vehicles An apparatus for controlling hydraulic pressure delivered to brake cylinders for rear wheels of a motor vehicle in dependence on load states and deceleration thereof comprises a first hydraulic chamber communicated with a master brake cylinder operable by... | 11/27/1979 |
| 4170386 | Control for a two stage master cylinder A two stage master cylinder having a bore with a first diameter and a second diameter separated by a shoulder. A first piston is located in the first diameter of the bore to establish a first chamber. A second piston has a first section located in the fir... | 10/09/1979 |
| 4086770 | Dual circuit quick take-up master cylinder A master cylinder of the dual pressurizing chamber type for pressurizing brake fluid in separate brake actuating circuits has the primary piston reciprocably mounted in a stepped bore so that the piston rear land moves within a larger bore section than do... | 05/02/1978 |
| 4078385 | Brake power boosting mechanism A brake force booster installation with a mechanical, pneumatic or hydraulic actuating mechanism acting on a servo- and adjusting-unit, which in turn acts on the master cylinder, with filling devices and with control- and shifting-devices; the filling dev... | 03/14/1978 |
| 4051877 | Gas compression apparatus Apparatus for transferring gas from a first container to a second container of higher pressure comprising a free-piston compressor having a driving piston and cylinder, a smaller diameter driven piston and cylinder, and a rod member connecting the driving... | 10/04/1977 |
| 4050251 | Hydraulic booster The invention relates to a hydraulic servomotor comprising a housing provided with a bore slidably receiving two pistons separating an actuating chamber from an utilization chamber, said pistons including an annular outer piston and an inner piston receiv... | 09/27/1977 |
| 4028891 | Booster brake unit A hydraulic transmission is provided between the booster piston and the master cylinder piston which is automatically interrupted if the booster power is not present. In this arrangement, when booster power is not present, a sufficient pressure can be gen... | 06/14/1977 |
