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| Number | Title | Issue Date |
| 7698893 | Pressure-medium cylinder with pressure intensification For many applications pressure-medium cylinders have to achieve high adjusting forces which often impairs the dynamics of such cylinders due to the large piston cross sections and cylinder volumes, and/or pressure medium has to be supplied at very high pressure. The... | 04/20/2010 |
| 7640742 | Device for monitoring the level of a container A device for monitoring the level of a supply reservoir, in particular of a hydraulic motor vehicle brake system, comprising a float that has a magnet for actuating a switch or a sensor. The float has a multipart design comprising a first part and a second float par... | 01/05/2010 |
| 7318313 | Switch A switch in particular for a master cylinder unit, for opening and/or closing an electrical circuit, for example, for switching on the brake lights, comprises a casing suitable for being housed in a compartment of the cylinder body, a first electrical contact fixed ... | 01/15/2008 |
| 7246636 | Hydraulic fluid reservoir and hydraulic system A hydraulic fluid reservoir and hydraulic pump combination has at least one hydraulic fluid port and includes a container with a hollow body having a top and a conduit having a bottom within the container and a top above the bottom. The conduit has an opening adjace... | 07/24/2007 |
| 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 |
| 7171982 | Hydraulic fluid reservoir and hydraulic system A hydraulic fluid reservoir and hydraulic pump combination has at least one hydraulic fluid port and includes a container with a hollow body having a top and a conduit having a bottom within the container and a top above the bottom. The conduit has an opening adjace... | 02/06/2007 |
| 7134327 | Pedaling force sensor and pedaling force detection device using the sensor A force-on-pedal sensor of the present invention includes a cylindrical substrate (11) whose one end is closed having: a hole part (11d) at a center of its side section (11c); and a strain resistance element (13) via an insu... | 11/14/2006 |
| 7104612 | Vehicle brake hydraulic pressure generator A brake hydraulic pressure generator is proposed which is simple in structure and can suppress fluctuations in the brake pedal operating amount due to fluctuations in the amount of brake fluid consumed in the brake circuit. The brake hydraulic pressure generator inc... | 09/12/2006 |
| 7063061 | Liquid quantity visual confirmation device and reservoir-forming member A liquid quantity visual confirmation device comprises a first reservoir-forming member, and a second reservoir-forming member forming a liquid reservoir in combination with the first reservoir-forming member. The second reservoir-forming member is at least partiall... | 06/20/2006 |
| 7044217 | Stuffing box for progressing cavity pump drive Progressive cavity (PC) pump drive heads require a stuffing box to seal crude oil from leaking onto the ground where the polish rod passes from the crude oil passage in the wellhead to the drive head. Because crude oil typically contains fine sand particles, alignme... | 05/16/2006 |
| 7018002 | Motor vehicle master cylinder with device for detecting actuation of a braking system The invention proposes a master cylinder 1 with a device for detecting actuation of a braking system. The detection device is fixed to a body 2 of the master cylinder 1 at a pressure chamber 5. The detection device comprises a magnetic ci... | 03/28/2006 |
| 7008023 | Hydraulic brake apparatus A hydraulic brake apparatus includes a brake master cylinder having a rod piston moving in response to a brake pedal; a separation valve provided in a hydraulic brake circuit in order to establish and shut off communication between the brake master cylinder and the ... | 03/07/2006 |
| 7004059 | Hydraulic master cylinder switch A switch adapted to be positioned on the pushrod of a hydraulic cylinder assembly and including a housing adapted to be positioned against an end of the hydraulic cylinder assembly and including a plurality of axially spaced electrical contacts, and a plunger mounte... | 02/28/2006 |
| 6996984 | 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 body having a cavity used as an internal fluid reservoir. Furthermore, a damping mechani... | 02/14/2006 |
| 6962166 | Hydraulic fluid reservoir and hydraulic system A hydraulic fluid reservoir and hydraulic pump combination has at least one hydraulic fluid port and includes a container with a hollow body having a top and a conduit having a bottom within the container and a top above the bottom. The conduit has an opening adjace... | 11/08/2005 |
| 6951104 | Hydraulic piston-and-cylinder arrangement A hydraulic piston-and-cylinder arrangement has a piston to which a signal element is assigned and which is accepted movably in a longitudinal direction in a cylinder housing, at which a position sensor is secured, by means of which an axial position of the signal e... | 10/04/2005 |
| 6886333 | Signal transmitter comprising a hall sensor integrated in a master cylinder The present invention relates to a position indicator for displaying the position of a piston within a cylinder as part of a piston-and-cylinder assembly in a brake system. The provision of a Hall element for a hydraulic generating cylinder is known in the art, with... | 05/03/2005 |
| 6732517 | Retainer for brake master cylinder travel sensor An assembly for sensing travel by a piston in a master cylinder comprises a magnet and a retainer for retaining the magnet proximate the piston. An orientation screw engages an axial slot in the piston to inhibit rotation of the piston. ... | 05/11/2004 |
| 6729450 | Electro-hydraulic brake booster A brake booster amplifies driver brake pedal input into an output force and travel for operating a master cylinder. A power unit builds and stores high pressure fluid to provide boost. Inlet and outlet solenoid valves regulate pressurized fluid to the amplifying mec... | 05/04/2004 |
| 6619039 | Brake master cylinder-sensor system and method A brake master cylinder-sensor system and method are provided. The system includes a master cylinder, a piston slidably positioned in the master cylinder, a magnet positioned on the piston, and a sensor disposed on the master cylinder. A change of piston ... | 09/16/2003 |
| 6612659 | Intelligent input push rod assembly An intelligent input push rod assembly for applying an input force from a brake pedal to a power booster of a brake system. The input push rod assembly includes a sensor that is capable of generating an electrical output having a magnitude that varies wit... | 09/02/2003 |
| 6564694 | Dual hall effect sensor for determining travel A non-contact Hall Effect position sensor integral to a master cylinder for an automotive hydraulic braking system provides reliable brake pedal position information without regard to the geometry and placement of the brake pedal input, decreasing the com... | 05/20/2003 |
| 6539853 | Smart card connector with retain and eject means A press that includes a push rod (12) that can be pushed downward to cut and mold miniature components, has a small size and a minimum number of components, and can be easily and precisely controlled. The push rod has a largely upwardly-facing shoulder (1... | 04/01/2003 |
| 6443535 | Deceleration and compensation for low vacuum levels in a brake-by-wire braking system A system or method for compensating for low vacuum levels in a brake-by-wire system includes continually monitoring the level of vacuum in a vacuum booster. The state or condition of the vacuum source is also monitored to determine whether it is on or off... | 09/03/2002 |
| 6422661 | Hydraulic brake master cylinder with integral pressure transducer A hydraulic brake master cylinder for a vehicle includes a pressure transducer mounted in the master cylinder primary piston for sensing hydraulic pressure applied to a brake circuit. Transducer signals are transmitted to the exterior of the master cylind... | 07/23/2002 |
| 6322164 | Braking device The pump is connected on its delivery side through an auxiliary passage to a primary passage connecting the master cylinder and brake cylinder to each other, and a pressure control valve is provided in a portion of the primary passage between the master c... | 11/27/2001 |
| 6109036 | Sealed hydraulic intensifier A sealed hydraulic intensifier has a sealed hydraulic cylinder actuator having a cylinder defining a piston chamber, a piston fitted in the piston chamber of the cylinder, and a piston rod connected to the piston, and a pressure controller disposed adjace... | 08/29/2000 |
| 5873247 | Vehicle brake system with an electronically controllable brake booster A vehicle brake system with an electronically controllable brake booster, comprising an actuation member (70, 80) transferring the actuation travel of a brake pedal to a master cylinder, which is allocated a travel limiting element (82) accepted between t... | 02/23/1999 |
| 5852936 | Pressure medium actuated operating device Pressure medium actuated control cylinder for wear compensation. A cylinder chamber includes two displaceable pistons. One piston has a first piston rod which extends outside the cylinder, and a second piston rod which extends into a through-bore in the s... | 12/29/1998 |
| 5758758 | Clutch assembly for a motor vehicle having an actuator cylinder for the engagement and release of the friction clutch assembly An actuator cylinder for the engagement and release of the friction clutch of a motor vehicle is described. The actuator has a device to indicate clutch engagement position, which is located outside the cylinder. A piston is disposed within the actuator c... | 06/02/1998 |
| 5533336 | Hydroelectric cylinder for improved power amplification and control The present invention describes an apparatus for achieving power amplification in general press and elevating systems with enhanced control and without the disadvantages of the pneumatic and angle-linked devices. A motor is coupled to a screw and nut for ... | 07/09/1996 |
| 5201178 | Hydra-jack screw A hydra-jack screw apparatus is provided for exerting a force against an object, for adjusting the magnitude of the force exerted against the object, and for providing a visual indication of the magnitude of the force exerted against the object. The appar... | 04/13/1993 |
| 5182911 | Hydraulic pressure actuating systems with pivotable mounting A hydraulic pressure actuating system has a master cylinder pivotally mounted to the dash panel in line with the actuator pedal, a remotely mounted hydraulic fluid reservoir assembly positioned at the high point of the system for self-bleeding, and an act... | 02/02/1993 |
| 5066940 | Brake pedal travel warning system A brake pedal travel warning system for use in an automotive vehicle includes a brake pedal and a master cylinder associated with the brake pedal through a connecting link. The master cylinder includes a fluid reservoir containing brake fluid and a housin... | 11/19/1991 |
| 5046313 | Master cylinder with fluid level and pressure failure detection A master cylinder (12) having a switch (70) which is activated by either a magnet (78) carried by a float (76) in a reservoir (40) or a pin (66) moved by a differential area piston (52). The switch (70) had a first blade (82) connected a source of electri... | 09/10/1991 |
| 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 |
| 4914916 | Tandem master cylinder with electromagnetic position sensors for each piston A brake failure warning system for a dual hydraulic master cylinder for use with a motor vehicle. The warning system employs a pair of Hall Effect magnetic sensors which are positioned on the exterior of a plastic cylinder in association with the two pist... | 04/10/1990 |
| 4911276 | Method of motor vehicle assembly A method of assembling a motor vehicle in which a multicontact switch is provided on the input rod of the master cylinder of a prefilled master and slave cylinder hydraulic apparatus; the master cylinder is positioned in the engine compartment of a vehicl... | 03/27/1990 |
| 4828333 | Slip-controlled brake system A system is disclosed including valves which are opened or closed dependent upon the position of master cylinder pistons. Upon commencement of slip control, pumps supply fluid either into the slip control cycle or into the working chambers depending upon ... | 05/09/1989 |
| 4815292 | Multi-part primary pressure-balanced proportioning valve with brake pressure failure switch The proportioning valve assembly may be screwed into a complementary-shaped opening in a master cylinder. The valve assembly includes a differential area piston biased by a spring toward the outlet which communicates with the rear brakes. The master cylin... | 03/28/1989 |
