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| Number | Title | Issue Date |
| 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 |
| 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 |
| 5720170 | Master cylinder and emulator with apply assist A master cylinder and emulator includes a primary piston and a secondary piston which are movable to provide fluid pressure to effect wheel braking in a vehicle. In addition, the master cylinder includes an emulator assembly which supplies conventional pe... | 02/24/1998 |
| 5582009 | Air-oil intensifier An intensifier type of fluid actuator includes a body including a first manifold connected by a first tube to a second manifold to define an intensifier chamber, a third manifold connected by a second tube to the second manifold to define a reservoir cham... | 12/10/1996 |
| 5127506 | Clutch actuating system According to an illustrative example of the invention, a foot pedal acts upon a first master cylinder and with delay upon a second master cylinder. Both master cylinders are connected with a slave cylinder which acts upon a clutch releaser. In a first ran... | 07/07/1992 |
| 5083432 | Tandem master cylinder with a third piston and chamber A hydraulic braking system includes the third piston slidably disposed between the first piston and the second piston of the tandem master cylinder so as to define the third pressure chamber between the third piston and second piston. The third pressure c... | 01/28/1992 |
| 4993226 | Multi-piston air-oil pressure intensifier with automatically variable working stroke length A pressure intensifier comprising a housing incorporating a first floating piston-cylinder unit with means to supply a primary pressure fluid medium to one side of the piston to apply pressure to a fluid medium in contact with the other side of the first ... | 02/19/1991 |
| 4805966 | Slip-control hydraulic brake booster with braking-pressure responsive valve for fast-fill cylinder A hydraulic brake system includes a hydraulic power booster (11) and a master cylinder (12) connected downstream of the power booster (11). The pressure chamber (21) of the power booster (11) is pressurized by an auxiliary pressure which is dependent on t... | 02/21/1989 |
| 4741161 | Braking pressure generator for a hydraulic brake system for automotive vehicles A braking pressure generator with a master brake cylinder (2) and a hydraulic brake power booster (1) connected upstream thereof and comprising a piston (16) of larger effective surface which latter is incorporated axially movably within limits in a bore ... | 05/03/1988 |
| 4455828 | Hydraulic power unit A maximum displacement, reciprocating air operated demand only hydraulic power unit for supplying hydraulic fluid under pressure to one or more hydraulic motors, comprising a pneumatic power cylinder having a power piston therein, a hydraulic slave cylind... | 06/26/1984 |
| 4419862 | Hydraulic master cylinders A master cylinder for a hydraulic brake system includes a piston which divides a primary bore into a primary chamber and a secondary chamber. The piston rod sealingly slides in a secondary bore of smaller cross-sectional area than the primary bore. An exp... | 12/13/1983 |
| 4268007 | Valve actuating equipment Actuating equipment for a gate valve or penstock uses both compressed air and hydraulic oil to obtain the advantages of both. A control valve directs air to a hydraulic reservoir so as to drive oil at the air pressure into one chamber of a double acting c... | 05/19/1981 |
| 4253306 | Master cylinder A master cylinder for a hydraulic brake system of an automotive vehicle having front and rear sets of brake cylinders is disclosed, in which during the application of brake pressure above a predetermined value at which modulation and reduction of the rate... | 03/03/1981 |
| 4244185 | Master cylinder for hydraulic brake system A master cylinder includes a master cylinder piston which is slidable by a booster with a hydraulic transmission interposed between the booster and the master cylinder piston. The booster includes two booster pistons the first of which has the same effect... | 01/13/1981 |
| 4231543 | Controllable hydraulic valve mechanism for reciprocating engines or pumps A controllable hydraulic valve mechanism for reciprocating engines or pumps including a drive piston, operable by a cam is provided with control edges and projects into a drive cylinder; a working piston which operates the valve directly and is guided in ... | 11/04/1980 |
| 4225022 | Brake booster A brake booster includes a booster piston adapted to be acted upon by the pressure fluid metered through a valve device and displacing a master cylinder piston. A pressure chamber is formed between the booster piston and the master cylinder piston. An add... | 09/30/1980 |
| 4220007 | Servo-assisted hydraulic master cylinder A servo-assisted hydraulic master cylinder has a variable ratio effect so that brake fluid is initially displaced to the brakes at a high rate with respect to driver pedal movement and then at a low rate when an appropriate pressure has developed. A stepp... | 09/02/1980 |
| 4172364 | Servo-assisted hydraulic master cylinder A servo-assisted hydraulic master cylinder has a variable ratio effect so that brake fluid is initially displaced to the brakes at a high rate with respect to driver pedal movement and then at a low rate when an appropriate pressure has developed. A stepp... | 10/30/1979 |
