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| Number | Title | Issue Date |
| 7391309 | Braking monitoring system A monitoring system for driver's braking habits comprising a sensor connected to brakes of a vehicle provided to sense and evaluate the following levels of pressure being applied to the brakes by a driver: normal pressure, above normal pressure and an excessive pres... | 06/24/2008 |
| 7363127 | Air brake system monitoring for pre-trip inspection Vehicles equipped with air brake systems and compressed air systems for supporting operation of the brakes provide for automated inspection of the air compressor system using an onboard vehicle or engine management computers. During vehicle operation, the system con... | 04/22/2008 |
| 7250872 | Method and device for testing at least one LED strip A test device for at least one LED strip contains: a voltage source, by way of which a cold test voltage or a warm test voltage can be applied to a parallel circuit formed of a test resistor and the LED strip, and an evaluation unit which records the cold test curre... | 07/31/2007 |
| 7168771 | Methods of measuring pressure of hydraulic fluid, methods of evaluating soundness and hydraulic drive devices for carrying out the methods A condition of hydraulic fluid conducted from an accumulator to an operation device via a pressure control unit, is evaluated by determining a pressure (Pa) of the fluid in a flow path interconnecting the accumulator and the control unit, and determining a stabiliza... | 01/30/2007 |
| 7102495 | Method for preventing collisions involving motor vehicles A collision prevention method for motor vehicles is provided, in which method obstacles in front of the vehicle are detected by an on-board positioning system, a collision probability is calculated from the position data, and one or more responses to prevent a colli... | 09/05/2006 |
| 7089815 | Air brake system characterization by self learning algorithm Vehicles equipped with air brake systems and onboard vehicle management computers may be programmed to determine normal operating variables for the air compressor system used for maintaining air brake system pressure. The algorithm used determines normal compressor ... | 08/15/2006 |
| 7088227 | Alarm for a hydraulic system, hydraulic system, method of giving an alarm and vehicle incorporating a hydraulic system An alarm for a hydraulic system, a hydraulic system incorporating an alarm, a vehicle having a hydraulic system which incorporates an alarm, and a method of giving an alarm in a hydraulic system, where the hydraulic system comprises hydraulic fluid which is put in c... | 08/08/2006 |
| 7034673 | Method for monitoring an electrohydraulic vehicle braking system Method for monitoring an electrohydraulic braking system. The volume uptake is determined by the elasticity within the wheel brake that is subjected to certain fluctuations, on the one hand, and to a much greater degree by the clearance that is present, on the other... | 04/25/2006 |
| 6942304 | Electronically controllable brake actuating system The present invention discloses an electronically controllable brake actuating system for automotive vehicles, including an unpressurized pressure fluid supply reservoir, a pressure source actuatable by an electronic control unit, the pressure of which can be applie... | 09/13/2005 |
| 6927681 | Mixed air amount alarm device A mixed air amount alarm device is provided which determines the amount of air present in a hydraulic circuit between a hydraulic pressure source and an instrument driven by hydraulic pressure, and produces an alarm if the air amount is excessive, a situation is pre... | 08/09/2005 |
| 6753771 | Vehicle monitoring system A vehicle monitoring system for monitoring a condition of relatively moving vehicle components, particularly including the pushrod of a brake actuator, including a magnet on one of the components, a sensor on the other component within the magnetic field of the magn... | 06/22/2004 |
| 6650234 | Vehicular anti-theft system with brake line valve A vehicular anti-theft system with brake line valve including a valve mechanism connected to the plurality of brake lines between a master cylinder and the associated brakes of a vehicle. The valve mechanism includes a housing with a solenoidal valve ther... | 11/18/2003 |
| 6549126 | Dry interface corner actuator single sensor for lining wear and low reservoir detection The present invention provides a sensor system for detecting lining wear and fluid level in a dry interface corner actuator for a single wheel brake including a reservoir assembly. The reservoir assembly includes a reservoir for containing fluid for the a... | 04/15/2003 |
| 6297733 | Stable, reliable capacitive oil deterioration and level sensor A reliable capacitive oil deterioration and level sensor has a conductive housing member that includes a conductive shielding member defining a ground electrode, and a conductive inner member defining a measuring electrode. The shielding member protects t... | 10/02/2001 |
| 6198388 | Voice warning system for automobiles A voice warning system for automobiles includes a microprocessor connected with the battery of an automobile, a plurality of sensors arranged on different parts of the engine and connected with the microprocessor, and two voice integrated circuits for sto... | 03/06/2001 |
| 6119059 | Advanced warning device for monitoring the working conditions of hydraulic brakes system of motor vehicles An advance warning device for monitoring the working conditions of a hydraulic braking system of a motor vehicle is composed of a plurality of sensors and a controller in communication with the sensors for processing the signals transmitted by the sensors... | 09/12/2000 |
| 5767397 | Method and apparatus for testing the brake system of a vehicle In at least one operating situation, especially while the vehicle is stopped, pressure is built up in a defined manner and then released for test purposes without waiting for a steady state value to be reached. On the basis of the pressure-time or force-t... | 06/16/1998 |
| 5742230 | Apparatus for triggering a warning device An apparatus for triggering a warning device, in particular in a vehicle with an on-board controller to influence braking pressure and/or engine torque and/or steering as a function of the movement behavior of the vehicle wheels and/or of the vehicle, is ... | 04/21/1998 |
| 5677667 | Data communications apparatus for tractor/trailer using pneumatic coupler In combination with a tractor and a trailer, an apparatus and method are provided for monitoring various operating conditions of at least the trailer by a driver positioned on the tractor. The apparatus preferably has a pneumatic braking system carried by... | 10/14/1997 |
| 5572187 | Air brake monitoring and safety system A monitoring and safety system for air-operated parking brakes and foot brakes on a vehicle employs electric contacts to provide alarms when movement of the actuators occurs in a manner indicative of failure or malfunction in the actuators or in the brake... | 11/05/1996 |
| 5570078 | Brake system for preventing unauthorized use of vehicle This invention relates to vehicle theft alarm and prevention devices, and in particular discloses a system that operates on the brakes of a vehicles to prevent the unauthorized use of a vehicle. Upon an unauthorized use of the vehicle, the system causes t... | 10/29/1996 |
| 5413404 | Method for detecting trouble in fluid pressure system and fluid pressure brake system for vehicle A method for detecting trouble in a fluid pressure system which has a fluid pressure source including a fluid pump, a pressure tank connected to the pump, a pressure detector for detecting fluid pressure in the pressure tank, and a control device for cont... | 05/09/1995 |
| 5132664 | Overload warning system for a trailer brake arrangement An overload warning system for a trailer brake cylinder of a trailer brake system having a nominal deceleration rate. It has been found that previous temperature sensing overdue warning systems have a disadvantage that undue delay occurs and that no warni... | 07/21/1992 |
| 5083274 | Railroad brake pressure recording A railroad brake pressure recorder for use with both analogue and digital break pressure manifolds monitors the signal on its analogue air brake pressure input connector. If the signal on this input exceeds a predetermined frequency, inputs are processed ... | 01/21/1992 |
| 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 |
| 5016442 | Master cylinder with fluid level and pressure failure detector A master cylinder having a housing with a first bore therein for retaining a pair of pistons which move in response to an input force and develop fluid pressure to effect a brake application. A second bore in the housing carries a differential area piston... | 05/21/1991 |
| 4937553 | Electrohydraulic device for continuously monitoring the pressure in a hydraulic brake system for automotive vehicles An electrohydraulic device is suggested for continuously monitoring the pressure in a hydraulic brake system for automotive vehicles, in particular for outputting electric control signals in dependence upon applied pressure signals, the said device being ... | 06/26/1990 |
| 4848847 | Pressure supply system especially for brake systems of motor vehicles A pressure supply system for the generation of the auxiliary pressure of a hydraulic brake system for motor vehicles comprises an accumulator, a hydraulic pump driven by electromotive force and a pressure switch (1) controlling the turning on and off of t... | 07/18/1989 |
| 4841158 | Safety relay circuit for switching on electric systems of automotive vehicles A safety relay circuit for operating electric systems of automotive vehicles is disclosed. The circuit includes two series-connected change-over relays connecting the vehicle's electrical system to the operative voltage. The change-over relays are actuate... | 06/20/1989 |
| 4824182 | Anti-lock hydraulic brake system for automotive vehicles An anti-lock hydraulic brake system which includes a brake pressure generator composed of a master cylinder, a brake power booster inserted upstream thereof and a pressure modulator interposed between the master cylinder and the brake power booster. A res... | 04/25/1989 |
| 4799048 | Accumulator An accumulator has a piston axially slidably disposed in a cylinder mounted in a casing, the cylinder and the piston jointly defining a reservoir communicating with an inlet/outlet port in the casing. A piston rod axially movably disposed in the casing ha... | 01/17/1989 |
| 4769554 | Electrical switching mechanism for circuits in automotive vehicles The present invention is concerned with an electrical switching mechanism for circuits associated with hydraulic systems in automotive vehicles. The switching mechanism comprises at least one switch (13, 15) disposed on a printed circuit board (1), which ... | 09/06/1988 |
| 4755803 | Air brake manifold all level reset An improved automatic train-line air brake pressure monitoring system includes circuits that emulate an automatic brake valve and cause an automatic brake manifold release whenever a four psi increase in pressure is sensed. The system includes a pressure ... | 07/05/1988 |
| 4708225 | Overload protection and/or warning arrangement An overload protection and/or warning arragement for a vehicle brake which is activated by brake pressure so that overload protection and warning indication occurs essentially without any time-delay. In one embodiment of the invention, it is proposed to compar... | 11/24/1987 |
| 4318091 | Self-resetting warning actuator for a dual circuit brake system A self-resetting warning actuator (42) for a vehicle brake system includes a housing (27) having a bore (44) which defines a recess (58). A pair of pressure responsive pistons (50, 54) are received in the housing bore and each is exposed to the pressure i... | 03/02/1982 |
| 4290045 | Brake system warning circuit A warning circuit which generates signals in response to selected conditions of a vehicle hydraulic brake system. The brake system includes an engine-driven main source of hydraulic pressure, a relay-actuated auxiliary source of hydraulic pressure, a flow... | 09/15/1981 |
| 4272659 | Hydraulic brake warning switch A differential pressure sensing switch for a motor vehicle has a piston axially slidable in a housing and exposed at each end to the pressure in separate brake circuits. At one end, the piston has a smaller diameter exposed to fluid pressure than at the o... | 06/09/1981 |
| 4262278 | Diagnostic brake system warning circuit A warning circuit generates warning signals in response to conditions of a vehicle brake system which includes main and back-up brake fluid pumps. The main pump is engine-driven and ignition-switch controlled. The back-up pump is relay actuated and batter... | 04/14/1981 |
| 4207565 | Piston overtravel indicator An overtravel indicator for a piston received in a cylinder having an end wall toward which the piston moves includes an elongated indicator rod slidably mounted through a dielectric bushing in the end wall. A conductive garter spring is compressed betwee... | 06/10/1980 |
| 4156864 | Pressure switch checking device for locomotives A device which facilitates the testing of pressure switches included in the brake systems of locomotives. An air line is tapped into the pressure line of each switch and is provided with a quick connect coupling conveniently located on a test panel. Anoth... | 05/29/1979 |
