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| Number | Title | Issue Date |
| 8051658 | Hydraulic element A hydraulic element, in particular for arranging in a pressure line between a master cylinder and a slave cylinder of a hydraulic clutch actuating arrangement, having a housing which has a master-cylinder-side hydraulic connection and a slave-cylinder-side hydraulic... | 11/08/2011 |
| 7694517 | Master cylinder, method for manufacturing a master cylinder, and check valve system of the master cylinder A master cylinder designed to facilitate an operation of assembling and adjusting a check valve is provided. A supply passage for supplying operating fluid from a reservoir 2 to a pressure chamber 6 is formed in a cylinder body 3 connected to th... | 04/13/2010 |
| 7404292 | Hydraulic system, in particular for motor vehicles In a hydraulic system for motor vehicles in particular, including a master cylinder, a slave cylinder, and a pressure medium line connecting them, an inexpensive pressure boost is achieved by the fact that the hydraulic system includes a pump having an inlet and an ... | 07/29/2008 |
| 7263831 | Air-to-oil intensifying cylinder A pressure intensifier for generating a relatively large force includes a plurality of pistons driven in advancing and retracting directions. The pressure intensifier includes a rod selectively drivable into a cavity to amplify the force acting on one of the pistons... | 09/04/2007 |
| 7231766 | High pressure intensifying piston valve The present invention includes a piston valve for charging and discharging a first fluid chamber. The piston valve includes a piston shaft and a ring comprising a seal element. The piston shaft has a first end and a second end with the first end including a counter ... | 06/19/2007 |
| 7219496 | Pressure-limiting device in a hydraulic path for clutch actuation A pressure-limiting device in the hydraulic path for a clutch including at least one restrictor member having a central restrictor bore for pressure reduction and a cup-shaped retaining ring to which pressure is applied by a spring and the bottom of which has a cent... | 05/22/2007 |
| 7202426 | Master cylinder position switch A clutch assembly having a master cylinder that includes non-contacting position switches is disclosed. The master cylinder controls a slave cylinder that shifts the release bearing of the clutch system. A cruise control interrupt switch and an ignition system inter... | 04/10/2007 |
| 7156183 | Electric hydraulic power unit and method of using same An apparatus includes a housing defining a chamber therein and defining an inlet port and an outlet port and a movable pressure barrier, disposed in the chamber, separating the chamber into first and second portions, the inlet port and the outlet port being in fluid... | 01/02/2007 |
| 7059283 | System and method of retaining hydraulic fluid in a hydraulic valve actuation system Methods and systems for retaining hydraulic fluid in a hydraulic valve actuation system adapted to be installed on an internal combustion engine are disclosed. The system may include a hydraulic fluid supply connected by one or more passages to a fluid accumulator a... | 06/13/2006 |
| 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 |
| 7021172 | Hydraulic throttle for vehicles A hydraulically operated throttle system that has the hydraulic system components installed entirely within the throttle grip on the handlebar. A regular throttle cable is run through the frame/handlebar where it connects to the hydraulic system. A three-piston syst... | 04/04/2006 |
| 6973857 | Hand tool adjuster An adjusting device for a tool includes a body with two ends and a fluid filled passageway, which extends between the ends, one end of the body cooperates with a work piece. An actuating member is movably connected to one end of the body, communicates with the fluid... | 12/13/2005 |
| 6952922 | Choke valve of clutch release cylinder A choke valve of the clutch release cylinder wherein the actuating oil is slowly discharged when the clutch pedal is released, and when the clutch pedal is depressed, resistance to the actuating oil is minimized for the actuating oil to be swiftly and smoothly suppl... | 10/11/2005 |
| 6908160 | Hydraulic brake apparatus for a vehicle The present invention is directed to a hydraulic brake apparatus provided with a pressure source for generating hydraulic pressure, a hydraulic pressure boosting device having a pressure regulating valve for regulating the hydraulic pressure generated by the pressur... | 06/21/2005 |
| 6895749 | Double-acting pressure intensifying cylinder and method for intensifying pressure in the cylinder A double-acting pressure intensifying cylinder and method, wherein a first cylinder a second cylinder are connected via an operation chamber in series. The first fluid chamber is provided with a first piston and the second fluid chamber is provided with a second pis... | 05/24/2005 |
| 6782796 | Hydraulic pressure control valve and vehicle brake device using the same A hydraulic pressure control device is provided which is capable of pressure reduction and pressure increase by electronic control without changing over hydraulic circuits, and which is reliable and simple in structure. A vehicle brake device using such a control de... | 08/31/2004 |
| 6775979 | Actuation device for an electrohydraulic braking system The present invention relates to an actuation device for an electrohydraulic brake system of the ‘brake-by-wire’ type which is configured as a tandem master cylinder with a first and a second piston that are respectively biased by a resetting spring in oppositio... | 08/17/2004 |
| 6647953 | Hydraulic system volume reducer A volume reducer for a hydraulic system, particularly useful for low pressure hydraulic systems such as used in engine compression braking systems. The hydraulic system has an actuator and a pressurizer, with a hydraulic line interconnecting the actuator ... | 11/18/2003 |
| 6588209 | Method and apparatus for optimizing the oil flow inside of a diaphragm compressor Method and apparatus for optimizing the oil flow inside of a diaphragm compressor concerns the previously non-organized oil flow in the head of a diaphragm compressor leading to the previous formation of pockets between the diaphragm and the cover curve, ... | 07/08/2003 |
| 6581380 | Master cylinder with improved piston guidance A master cylinder formed of a forward plastic part snapingly secured to a rearward plastic part. The forward part has a tapered draft angle bore and the rearward part has a purely cylindrical bore aligned with the draft angle bore of the front part and co... | 06/24/2003 |
| 6546727 | Hydraulic system An hydraulic system that includes a master cylinder, a slave cylinder, a fluid conduit extending between the cylinders, and a pressure relief valve within the conduit between the cylinders. The pressure relief valve includes at least one port that is clos... | 04/15/2003 |
| 6454073 | Apparatus for hydraulically operating clutch A flow limiting device provided between a clutch master cylinder and a clutch operating cylinder has a first fluid chamber on one axial side in communication with the clutch master cylinder, a second fluid chamber on the axially opposite side in communica... | 09/24/2002 |
| 6343541 | Damping device for hydraulic adjustment devices in motor vehicles A damping device for installation in a hydraulic adjustment device such, for example, as for motor vehicle clutches. The hydraulic adjustment device has a cylinder that is either an input cylinder or actuator or an output cylinder. The input cylinder or a... | 02/05/2002 |
| 6338286 | Control device Apparatus for controlling the gears of a motor vehicle comprising a pivotable gear lever for pivoting between gear positions corresponding to the gear positions for the motor vehicle transmission, a primary hydraulic piston/cylinder arrangement coupled to... | 01/15/2002 |
| 6296324 | Brake fluid pressure generating device for a vehicle A brake fluid pressure generating device includes a master cylinder piston slidably disposed in a cylinder body, a pressure chamber and a power chamber formed in the cylinder body, a master cylinder that generates a master cylinder fluid pressure in respo... | 10/02/2001 |
| 6276137 | Brake master cylinder with dual check valve compensation through secondary piston A master cylinder provides separate flow paths through its secondary piston to provide greater fluid flow capacity from the reservoir to both the primary and secondary pressure chambers in response to the removal of brake fluid from the brake lines fed by... | 08/21/2001 |
| 6269641 | Stroke control tool for subterranean well hydraulic actuator assembly A stroke control tool for controlling the position of a subterranean well hydraulically actuated double acting piston and cylinder actuator assembly. The tool includes hydraulic fluid measuring means positioned adjacent the well and is connected to the ac... | 08/07/2001 |
| 6267456 | Brake master cylinder and pedal feel emulator A master cylinder (12) and pedal feel emulator (10) useful in a brake-by-wire system. A bore (18) of the master cylinder contains three pistons (22, 34, and 28), in tandem, that divide the bore into various zones (26, 24, 32, 30). The emulator contains a ... | 07/31/2001 |
| 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 |
| 6185937 | Master cylinder with hydraulic reaction independent of viscosity A master cylinder with hydraulic reaction. The master cylinder having a housing with a working chamber (12) therein in which slides a hollow main piston (3). The main piston (3) has a bore (130) for retaining a reaction piston (14) to define a reaction ch... | 02/13/2001 |
| 6141963 | Master cylinder There is provided a master cylinder in which a large quantity of working fluid can be supplied rapidly, the air bleeding takes less time in the manufacturing process, and satisfactory performance can be provided when traction control is operated. For the ... | 11/07/2000 |
| 5960630 | Hydraulic brake apparatus for a vehicle The invention is directed to a hydraulic brake apparatus which includes a master cylinder having a cylinder body and a master piston slidably disposed therein for defining a pressure chamber ahead of the master piston and a power chamber behind the master... | 10/05/1999 |
| 5946913 | Tandem master cylinder with an improved sealing function A tandem master cylinder with a bore (1a) for retaining primary (3) and secondary (4) pistons. The secondary piston (4) has a bearing surface (40) for retaining a ring (10) slideably located between a first spring (8) and a seal (4b). The ring (10) pushes... | 09/07/1999 |
| 5937988 | Throttle device for hydraulic actuator systems and for hydraulic actuator systems of clutches of motor vehicles A throttle device for the directionally-dependent influencing of the flow velocity of the fluid in hydraulic actuator systems, in particular of friction clutches in motor vehicles, with a throttle located between a master cylinder and a slave cylinder in ... | 08/17/1999 |
| 5927074 | Hydraulic brake apparatus for a vehicle The invention is directed to a hydraulic brake apparatus which includes a master cylinder having a cylinder body and a master piston slidably disposed therein for defining a pressure chamber ahead of the master cylinder and a power chamber behind the mast... | 07/27/1999 |
| 5918464 | Pressurized in-line master cylinder A manually operated in-line secondary master cylinder can be configured for use with any hydraulic system which accommodates multiple manual input forces, and which requires the secondary input device to operate independently of the primary input device. ... | 07/06/1999 |
| 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 |
| 5899068 | Hydraulic brake apparatus for a vehicle The invention is directed to a hydraulic brake apparatus which includes a master cylinder having a cylinder body and a master piston slidably disposed therein for defining a pressure chamber ahead of the master piston and a power chamber behind the master... | 05/04/1999 |
| 5887432 | Brake master cylinder with axially movable sleeve A brake master cylinder with a plunger piston is acted upon by a brake linkage. A floating piston is arranged between two working spaces and separates the first and the second working space fluidically from one another. Each of the two working spaces open... | 03/30/1999 |
| 5878573 | Hydraulic brake system In a hydraulic brake system of the present invention, the communication between a power chamber 30 of a hydraulic booster 2 and wheel cylinders (WCY) 58, 59 is allowed by a switching valve 64 when fluid pressure of an accumulator (ACC) 46 exceeds predeter... | 03/09/1999 |
