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| Number | Title | Issue Date |
| 7331641 | Braking stroke simulator The present invention is directed to a braking stroke simulator for use in a brake system, which comprises a simulator piston moved in response to operation of a manually operated braking member, and an elastic element for providing a stroke to the simulator piston ... | 02/19/2008 |
| 7175154 | Piston structure and liquid feeder valve Piston structure having a first side and a second side and in a recess (6) formed in an outer portion of the piston (1, 22) a resilient sealing element (5, 11, 21) is placed. The axial width and at least in some places the radial depth of the re... | 02/13/2007 |
| 7055323 | Oil pressure generator for a vehicle An oil pressure generator for a vehicle is disclosed, including a bar-shaped steering handle having a pipe structure, a lever pivotally mounted in the vicinity of an end portion of the handle, and a master cylinder for a hydraulic brake or a hydraulic clutch, the ma... | 06/06/2006 |
| 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 |
| 6966615 | Hydraulic braking pressure generating apparatus for a vehicle and a hydraulic brake device for a vehicle including a hydraulic braking pressure generating apparatus A hydraulic braking pressure generating apparatus for a vehicle includes a hydraulic pressure generator for generating a predetermined hydraulic pressure irrespective of a braking operation of a brake operation member and for outputting the predetermined hydraulic p... | 11/22/2005 |
| 6953228 | Actuating device for a brake unit of an electronically controlled vehicle brake system An actuating device for a brake unit of a vehicle EBS includes a tappet positioned in a housing of the brake unit for actuating a piston to operate a brake valve. A displacement sensor slide measures axial movement of the tappet. So that moving parts of the actuatin... | 10/11/2005 |
| 6905179 | Anti-lock braking system low pressure accumulator for protection master cylinder lip seals A braking system includes an accumulator positioned along the brake line between the wheel brake and a pump. The accumulator includes a cylinder defining a bore and a piston fitted within the bore. The cylinder defines an inlet and an outlet fluidically connecting t... | 06/14/2005 |
| 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 |
| 6655513 | Hydraulic brake device for a vehicle A hydraulic brake device for a vehicle includes an auxiliary piston having an effective cross-sectional area larger than that of a master piston, and a pressure transmitting chamber provided between the large diameter portion and the master piston. The au... | 12/02/2003 |
| 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 |
| 6568183 | Hydraulic brake device for a vehicle A hydraulic brake device for a vehicle includes a master cylinder having a master piston and an auxiliary piston for assisting the actuation of the master piston. The vehicle hydraulic brake device also includes a first valve mechanism for hydraulically c... | 05/27/2003 |
| 6564553 | Braking pressure intensifying master cylinder In a braking pressure intensifying master cylinder, as an input shaft (53) travels forwards in a braking maneuver, a control valve (54) is actuated to develop fluid pressure according to the input in a reaction chamber (38) and a pressurized chamber (35).... | 05/20/2003 |
| 6233932 | Fully hydraulic brake power generator/master cylinder unit with improved brake pressure feedback A fully hydraulic brake power generator/master cylinder unit (10) for a vehicle brake system has a housing (12) with a bore (14) which is formed therein and in which a primary piston (16) is arranged sealingly and displaceably. Located in the bore (14) is... | 05/22/2001 |
| 6062654 | Brake control valve A vehicle brake control valve includes a piston assembly which is movable a stepped cylindrical bore of a valve housing in response to an actuating force against the force of a spring. The piston assembly includes port control edges which control communic... | 05/16/2000 |
| 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 |
| 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 |
| 5544948 | Service and emergency brake system having a master cylinder with a travel simulator gas-filled spring A travel simulator having a progressive pedal characteristic to be in operation in a power-actuated service brake. The hydraulic brake system has a valve assembly for the switching of the brake system into operation as either a service brake or as an emer... | 08/13/1996 |
| 5234086 | Fluid pressure type booster device A fluid pressure type booster device is capable of feeding an output pressure of a fluid pressure source in a controlled manner by permitting a slide member to slide so as to balance the force acting in an advancing direction by a fluid pressure of a pres... | 08/10/1993 |
| 5211019 | Actuating unit for a hydraulic automotive vehicle brake system An actuating unit for hydraulic automotive vehicle brake systems, including a vacuum brake power booster, a master brake cylinder, and an operating element, configured to achieve a reduction of overall axial length and a simultaneous reduction of the weig... | 05/18/1993 |
| 5038564 | Pulsator-operated valving with reaction chamber accumulator for hydraulic booster system A fluid pressure booster device includes a booster body, a control piston in the booster body for forward and rearward movements to define a boosting chamber between the control piston and a rear surface of a master piston of a master cylinder, a valve pi... | 08/13/1991 |
| 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 |
| 5031404 | Pressurized air booster The invention provides a brake booster including in a preferred embodiment a housing, first and second annular flexible diaphragms spaced from one another forming a sealed second chamber within the housing and a sealed first chamber between the first diap... | 07/16/1991 |
| 5024056 | Dual-circuit brake booster In a brake apparatus for a hydraulic two-circuit brake installation of a road vehicle with static brake circuits, an outlet pressure space is provided for one of these brake circuits in which the brake pressure that is coupled into a static brake circuit ... | 06/18/1991 |
| 4976105 | Hydraulic booster system with accumulator A hydraulic booster for a master cylinder in which an inlet valve is interposed between an output pressure chamber at the back of the booster piston and an input pressure chamber connected to a pressure source. Advance of the valve piston opens the inlet ... | 12/11/1990 |
| 4942738 | Pneumatic brake booster piston with sleeve defining quick-fill input chamber In a booster casing (12) a movable wall (14) separates two compartments (16,18) from each other. In inoperative position, a control valve (20) connects the two compartments (16,18) with each other, and separates them when in an operative position, connect... | 07/24/1990 |
| 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 |
| 4900103 | Brake system with anti-skid control for motor vehicles A brake system having anti-skid control for motor vehicles has a brake booster having a brake valve and an emergency brake piston, and a master brake cylinder, combined in one housing with the brake booster having a master brake piston and two separate br... | 02/13/1990 |
| 4875338 | Hydraulic brake booster arrangement with parallel master cylinders and common housing for pivotable rocker A brake unit having a hydraulic brake booster and twin master cylinders in a common housing. The brake booster comprises a drive cylinder between the master cylinders which can be subjected to the outlet pressure of a brake valve of the brake booster whic... | 10/24/1989 |
| 4843819 | Hydraulic brake booster with parallel booster pistons A brake booster has a first booster cylinder and a booster piston disposed in it for displacing a master cylinder piston to pressurize a brake circuit. A tappet displaces the first booster piston directly if boost fluid pressure is inadequate. A second bo... | 07/04/1989 |
| 4826254 | Hydraulic dual-circuit external power brake valve of tandem design A hydraulic dual-circuit external power brake valve of tandem design has a primary control piston and a secondary control piston, both of which are located in a valve bore of the dual-circuit external power brake valve. The control pistons are provided wi... | 05/02/1989 |
| 4736588 | Hydraulic brake booster with coaxial axially spaced booster pistons A brake booster has a first booster cylinder and a booster piston disposed in it for displacing a rod-like master cylinder piston of a master cylinder which supplies at least one brake circuit (I, II), having a tappet for mechanically displacing the first... | 04/12/1988 |
| 4732001 | Hydraulic booster with boost-pressure responsive valve A braking pressure generator (1,21) for a vehicular hydraulic brake system, wherein a booster piston (15) which is slidable by hydraulic pressure is displaceable in the actuating direction. The booster piston (15) is arranged as a stepped piston with a sm... | 03/22/1988 |
| 4732429 | Hydraulic brake system with slip control A hydraulic brake system with slip control comprising a master cylinder (2) pressurizable by a hydraulic power booster (1). A booster sleeve (52) is provided which annularly encloses the booster piston (4), and which is slidably accommodated in the booste... | 03/22/1988 |
| 4667476 | Booster An improved booster for use with a master cylinder in a brake system is proposed which includes a spring for keeping the input shaft away from the booster piston. The spring has one end abutting on a piston acted by the auxiliary pressure from the auxilia... | 05/26/1987 |
| 4649707 | Brake pressure generator having an improced master cylinder and booster for an automotive hydraulic brake system A brake pressure generator for an automotive hydraulic brake system, wherein a booster piston (13) which is displaceable by an auxiliary hydraulic pressure in the direction of actuation is adapted to mechanically strike an annular piston (18) and is displ... | 03/17/1987 |
| 4624108 | Hydraulic brake booster A hydraulic brake booster including main cylinders operative relative to a pedal stroke by which a sufficient pedal stroke is still available in the event of a failure in the pressure supply so that the brakes can be actuated by the pedal stroke and furth... | 11/25/1986 |
| 4586591 | Pressure-fluid-operable vehicle brake system A pressure-fluid-operable vehicle brake system is proposed, which is fed by an auxiliary energy supply system (3) and which comprises a master cylinder device (1), in which a booster piston (40) adapted to be acted upon by the auxiliary energy is slidable... | 05/06/1986 |
| 4543791 | Power brake unit A power brake unit for automotive vehicles comprising a valve adapted to meter fluid from an energy source into a booster chamber to act upon a booster piston arrangement. The booster piston arrangement includes a first booster piston and a second booster... | 10/01/1985 |
| 4468926 | Vehicle brake booster A vehicle brake booster comprises a brake master cylinder operable by a brake pedal, and a power valve including valve means operable by the brake pedal to admit fluid under pressure from a source to a boost piston for applying a boost force to the master... | 09/04/1984 |
| 4326379 | Hydraulic control device for a motor vehicle braking circuit The invention relates to a master cylinder for an automobile braking circuit which is suitable for dual-circuit or single-circuit application. The master cylinder has at least one chamber connected to the braking circuit, the pressure in the chamber being cont... | 04/27/1982 |
