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Class 303/50 - MOTORMAN'S VALVES


Subclass of Class 303 - Fluid-pressure and analogous brake systems
Definition: Valves operated directly by a the motorman adapted to connect
No. of patents: 55
Last issue date: 10/17/2006


1    
NumberTitleIssue Date
7121154Load sensor having hourglass-shaped coil spring
A load sensor includes a load-input unit, an hourglass-shaped coil spring having one end coupled to the load input unit, a load-applying unit disposed at the other end of the hourglass-shaped coil spring, and a load detector for receiving the load from the load-appl...
10/17/2006
7073875Brake fluid circulation
A brake circuit has a brake connected with a master cylinder via a brake application line. The brake master cylinder has a first chamber in which brake fluid is pressurized on movement of a first piston in a brake applying direction by an operating device. The first...
07/11/2006
6984002Brake hydraulic pressure generator
A brake hydraulic pressure generator is proposed in which the brake stroke fluctuate less when the amount of brake fluid consumed in the wheel brakes fluctuates. Even when the brake pedal force is increased after the brake assisting force has reached its maximum, th...
01/10/2006
6953228Actuating 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
6866346Actuating 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...
03/15/2005
6513883Hydraulic brake for a vehicle
A hydraulic pressure brake device for a vehicle includes a first piston outputting brake pressure generated in a first pressure chamber and a second piston having a larger diameter than that of the first piston and provided rearward of the first piston an...
02/04/2003
6367886Brake pedal emulator system and method
A brake pedal emulator that produces a pedal characteristic not unlike conventional vacuum or hydraulic brake systems. The system includes an emulator housing, a damper positioned within the emulator housing, a shaft that is slidably received by the emula...
04/09/2002
6260932Handle extension of a valve
An extension handle for a manual valve connected at its first end to the stem of the valve by a pin which extends through the extension handle, the standard handle and the valve stem. A handle bracket may be mounted to the manual valve....
07/17/2001
6183050Braking system with remote boost valve
A brake system including a master cylinder for generating pressurized fluid, a wheel brake in fluid communication with the master cylinder, and a first valve for regulating the flow of fluid between the master cylinder and the wheel brake. The brake syste...
02/06/2001
5988771Pressure control valve equipped with a solenoid valve
A pressure control valve equipped with a solenoid valve, in which a main valve body is provided with an air-supply chamber connected to a pressurized air source, a control pressure chamber into which pilot pressure is input, an output chamber connected to...
11/23/1999
5831232Pneumatic emergency brake application valve and an associated electrical signaling switch
A manually operable pneumatic emergency brake valve and electric switch including a valve body having an inlet port and an outlet port, an internal valve assembly normally seated by the biasing force of a helical spring, a pair of pivotal levers for opera...
11/03/1998
5439276Tamper-resistant independent brake valve device for locomotive air brake equipment
A tamper-resistant independent brake valve device for use in a brake equipment on railway locomotives including a main body casing carrying a movable handle, a rotatable cam, a pivotal cam dog and an exhaust and supply valve assembly, a spring housing att...
08/08/1995
5395164Operating brake valve for an electrically and pneumatically actuated braking system in a motor vehicle
An operating brake valve for an electrically and pneumatically actuated braking system in a motor vehicle has a movable thrust piece (2) arranged within a housing (1) and a balance piston (4) actuated via a graduated spring (3), whereby a combined inlet/e...
03/07/1995
5307906Combined mechanically/hydraulically actuated braking system which provides tactile feed-back
A braking system for a vehicle. The braking system provides continuous tactile feed back through the brake pedal to the operator of the vehicle that conforms to the degree to which the vehicle brakes are being applied so that the tactile feed-back to the ...
05/03/1994
5275265Brake-booster with modulated reaction
The invention relates to a brake-booster (10) of a vehicle, comprising a casing (12) and a diaphragm (14) which divides in a sealed manner the interior of the casing into a front chamber (16) and a back chamber (18), a hollow piston (20) movable in the ca...
01/04/1994
5259666Double brake booster
The invention relates to a double brake booster for a motor vehicle, provided with a valve enabling the boost ratio to be varied as a function of the load of the vehicle. In addition to two pistons (64, 66) articulated to an arm (72), this valve comprises...
11/09/1993
5217280Pressure sensitive signal device for vehicle brake pedal
A brake pedal actuation sensor includes an optical coupler. In a preferred embodiment: the optical sensor is carried by a housing; a shutter is provided to interrupt the optical coupling according to the distance between the housing and a bearing; the shu...
06/08/1993
5056874Brake control valve
A brake control has a regulator valve to establish the pressure in the brake system during brake apply. A flow regulator valve permits a fast flow rate for filling of the system when brake apply is initiated and a slow flow rate when the brake system pres...
10/15/1991
5031968Electronically controlled brake device
An electronically controlled brake device for controlling a brake pressure according to a manual input. While the dynamic pressure line is functioning normally, the dynamic pressure acts on one end of a push rod associated with a brake pedal to give such ...
07/16/1991
5029951Hydraulic braking system for an automotive vehicle
A hydraulic braking system for an automotive vehicle having a power source for generating a hydraulic power pressure, a reservoir, a master cylinder having a master piston, a hydraulic booster for actuating the master cylinder in response to depression of...
07/09/1991
4993781Antijam brake-metering valve and method for its use
A port control member is depressed by either a mechanical force applied on it by the pilot, for moving it to meter pressure and flow from a supply pressure to the wheel brakes, or a hydraulic pressure force applied following take-off, to actuate the brake...
02/19/1991
4978177Signal mechanism responsive to force applied to vehicular brake pedal and the like
A vehicular brake lever arrangement is shown as having a brake lever pivotally supported at one end and a swingable other end provided with a pad for the application of a braking force thereto; a brake rod linkage leading to the vehicular braking system i...
12/18/1990
4938541Remote power assist hydraulic antilock braking system
A vehicle hydraulic braking system for applying the wheel brakes of an automotive vehicle comprising: a reservoir for holding a hydraulic brake fluid; a pump fluidly connected with the reservoir for pressurizing the fluid; at least one first valve fluidly...
07/03/1990
4923256Hydraulic booster
A resettable booster is disclosed including a booster chamber in communication with a resetting chamber through a closable connection. For pressure relief of the master brake cylinder, valves are switched so that the booster piston is pressure-balanced an...
05/08/1990
4875740Braking device for use in a motor vehicle
A braking device for use in a motor vehicle has a vacuum motor having a casing, a power piston displaceably mounted in the casing through a diaphragm which partitions the interior of the casing into a constant pressure chamber and a variable pressure cham...
10/24/1989
4861115Electrically-controlled motor vehicle brake system
An electrically-controlled motor vehicle brake system, which responds to fluid pressure supplied from a common source. The system includes an electronic control system to process information and issue brake commands. A brake cylinder, to apply and release...
08/29/1989
4850655Hydraulic booster
A hydraulic booster including a power piston, a booster chamber for applying a boost pressure to the power piston, an input rod, an intermediate inlet chamber for introducing a power source pressure thereinto, a valve mechanism provided in a valve chamber...
07/25/1989
4844553Dash control valve with differential trip
A control valve for a fluid pressure braking system includes a housing which receives a pair of identical plungers and corresponding springs acting on the plunger which activate automatically at different trip pressures. The differential trip pressures ar...
07/04/1989
4819996Automotive vehicle braking device
An automotive vehicle braking device comprises a hydraulic master cylinder (11) having at least one piston (21) for pressurization of the wheel cylinders connected thereto with hydraulic pressure and also having a vacuum brake force booster (12) inserted ...
04/11/1989
4818036Braking power transmitter
The present invention is a braking value transmitter with a pedal to modulate the braking pressure. The pedal is braced against a spring. The force exerted by the pedal or the position of the pedal is sensed by an electronic sensor. The output signal of t...
04/04/1989
4796958Integrated anti-lock braking system
An integrated anti-lock braking system includes a master cylinder, a modulator valve assembly, an electric motor pump, a brake proportioning valve, and a differential pressure valve all integrated into a common assembly. Primary and secondary fluid passag...
01/10/1989
4784442Brake pedal valve with setpoint adjuster including displacement and force sensors for electrically controlled brake system
A setpont adjuster for a brake pedal in a motor vehicle to control an electric brake system. The setpoint adjuster includes a displacement sensor and a force sensor in parallel-connection, in which the force sensor supplies the reference value. Electronic...
11/15/1988
4743071Hydraulic brake system for vehicle
In a hydraulic brake system for a vehicle of the kind comprising a fluid pressure source having a reservoir and a hydraulic booster having a power piston arranged to receive the pressure fluid of a control fluid chamber which is proportional to a stepping...
05/10/1988
4729609Slip-controlled brake system with fast-fill cylinder
For attaining an abrupt change in ratio, in a slip-controlled brake system for automotive vehicles, the chamber (11) of a fast-fill cylinder (4) is connected to a plunger chamber (41) of the braking pressure generator (1) which is acted upon by the booste...
03/08/1988
4691737Brake control valve
A control valve for a vehicle fluid pressure braking system includes a housing having an inlet port, an outlet port and a delivery port. A plunger is movable in the housing to control communication between the ports. The plunger is provided with a shoulde...
09/08/1987
4655511Hydraulic brake booster with travel simulator and associated anti-skid brake system
A method and a multi-circuit brake booster for feeding back disruptions of any arbitrary kind, even of an associated anti-skid brake system, to a then-changed brake pedal characteristic, the influence on the brake valve triggering being effected via a tra...
04/07/1987
4653813Device for monitoring a hydraulic brake system for vehicles
A brake system wherein the piston (2) of a master cylinder (1) is actuated by the pressure controlled by a brake valve (6), a monitoring device is provided for detection of fail conditions. The monitoring device comprises a switch (18) which is closed by ...
03/31/1987
4653811Relay valve device
A relay valve device which is actuated by the presence of a control signal pressure to a higher pressure supply into a consumer circuit than when the control signal pressure is not present. The relay valve device includes a first control surface and a sec...
03/31/1987
4444440Hydraulic boosters for vehicle braking systems
An hydraulic booster has a housing provided with an input member, a boost piston, an output member, and connections to a source of pressure and a fluid reservoir. A force applied to the input member is transmitted to the output member and augmented by the...
04/24/1984
4443040Hydraulic boosters for vehicle braking systems
In an hydraulic booster for a vehicle braking system a boost piston provides an output force in response to pressurization of a boost chamber under the control of a boost valve mechanism, which controls communication between the boost chamber and a pressu...
04/17/1984
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