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| Number | Title | Issue Date |
| 7219966 | Brake pedal feel simulator A brake pedal feel simulator is provided which eliminates the simulation force during emergency, non-assisted and failure conditions. The brake pedal feel simulator generally comprises a spring, a spring seat and a spring stop. The spring is operatively connected to... | 05/22/2007 |
| 7000633 | Flow amount control device A filter is annularly attached around a peripheral wall of a housing. The filter is composed of a filtering element that covers a fluid passage for inhibiting foreign objects from entering, a supporting portion for supporting the filtering element, and a connecting ... | 02/21/2006 |
| 6053205 | Valve arrangement An arrangement for use with a valve system permits facilitated adaptation to conditions where modified lever ratios are desired while an actuation force requirement remains unaffected, or where a modified actuating force requirement is desired while lever... | 04/25/2000 |
| 5116107 | Pneumatic braking system for tractor and trailer A pneumatic braking system for a tractor and trailer which delivers air to the trailer substantially first and in a greater amount than to the tractor but which continues to deliver to the tractor until the pressure at the tractor approaches the pressure ... | 05/26/1992 |
| 5056874 | Brake 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 |
| 4923254 | Hydraulic parking brake control system A hydraulic control valve for controlling the parking brakes of a vehicle hydraulic braking system having mechanically applied parking brakes which are released by hydraulic pressure includes a housing having a mechanically actuated control valve and a di... | 05/08/1990 |
| 4922120 | Brake system with slip control A slip-controlled hydraulic brake system with improved operational reliability during the slip control phase of operation has a master cylinder having shortened overall axial length. The master cylinder includes a valve-opening mechanism of one central co... | 05/01/1990 |
| 4838619 | Hydraulic brake system for automotive vehicles A brake system for automotive vehicles, comprising a tandem master cylinder (1) and a vacuum brake force booster (2). A pump (34) is connected to the supply chambers (10, 11) of the tandem master cylinder (1), which pump is actuated by an electromotor (35... | 06/13/1989 |
| 4803840 | Hydraulic brake system for automotive vehicles A hydraulic brake system is described including a tandem master cylinder whose working chambers are connected by separate brake lines to pressure control valves of a brake slip control apparatus, having the wheel brakes connected downstream of the control... | 02/14/1989 |
| 4793660 | Hydraulic brake system for automotive vehicles A hydraulic brake system for automotive vehicles has a master brake cylinder connected to an unpressurized reservoir and a brake line connected to a working chamber of the master brake cylinder and leading to pressure control valves of a brake slip contro... | 12/27/1988 |
| 4790414 | Railway deceleration controller for brake A controller for controlling the increase in fluid brake pressure as a brake is applied irrespective of how rapidly the operator applies the brakes. The controller includes a valve between inlet and outlet ports in a valve body, the valve having opposing ... | 12/13/1988 |
| 4775192 | Apparatus for the control of brake pressure An apparatus is disclosed for the control of brake pressure in a trailer pulled by a tractor. The apparatus includes a two-circuit controllable relay valve as the trailer control valve. The first circuit is controlled by the brake valve of the tractor wit... | 10/04/1988 |
| 4750787 | Relay valve for an air brake system A relay valve for use with a railroad car braking system includes a housing in which a control chamber is disposed between a delivery chamber on an upper side and an exhaust chamber on a lower side. A supply chamber is disposed above the delivery chamber.... | 06/14/1988 |
| 4741579 | Pneumatic distributor of the duplex type for motor vehicle braking systems The distributor includes a body with first and second inlet connectors for connection to two pressure sources, and first and second outlet connectors for connection to two separate brake circuits. Communication between the inlet connectors and the outlet ... | 05/03/1988 |
| 4724859 | Self-lapping type valve device A self-lapping type valve device having a construction in which the pressure force acting on the valve assembly is substantially the same when the valve assembly is in a lap condition following either a pressure-buildup phase of control or a pressure-rele... | 02/16/1988 |
| 4685748 | Control system for aircraft wheel brakes and method The invention provides a system and method for making the braking action more sensitive to pilot control, to provide a smooth stopping response to foot pedal movement by the pilot. A port control member (48) of a first stage metering valve (44) is mechani... | 08/11/1987 |
| 4678241 | Equalizer discharge valve for a railroad car air brake system An equalizer discharge valve for use on a railroad air brake system includes a valve housing having an equalizer chamber formed therein above a brake pipe chamber and separated by a piston, diaphragm configuration. The diaphragm is sealed on the outer cir... | 07/07/1987 |
| 4668021 | Brake feel augmentation valve and system Single and dual brake feel augmentation valves for use in a vehicle skid control system are disclosed. The brake feel augmentation valve has a first port which receives hydraulic fluid from a constant source, a second port which receives hydraulic fluid f... | 05/26/1987 |
| 4660894 | Proportioning brake valve with dual area secondary piston A dual circuit brake valve includes a relay piston (50) having primary (82) and secondary (84) areas which are normally communicated to the pressure level at the primary outlet or delivery port (18). The relay piston (50) responds to a pressure differenti... | 04/28/1987 |
| 4657046 | Brake valve A brake valve for feeding selectably different levels of fluid pressure into at least one pressure receiver, which is a component of a vehicle brake system. The brake valve includes a first, normally open valve having a ball and a second valve, which is n... | 04/14/1987 |
| 4606369 | Manually-operable fluid pressure regulating valve device A manually-operable pressure-regulating valve device, including a special handle mechanism and a self-lapping valve assembly having a feedback piston on which delivery pressure acts to urge the valve assembly actuating stem in a direction opposite handle ... | 08/19/1986 |
| 4553789 | Dual brake valve with brake proportioning A dual circuit brake valve for an articulated vehicle is responsive to a pressure signal provided by the system tractor protection valve to provide a full brake application in both the primary and secondary braking circuits actuating the front and rear wh... | 11/19/1985 |
| 4334713 | Hydraulic control system A hydraulic control system, for at least one hydraulic braking circuit, comprising a control unit, a brake pedal, an assisting hydraulic pressure plant having a fluid pressure source and a reservoir, a distributor valve having a slide fitted movably in th... | 06/15/1982 |
| 4324436 | Automatic load-dependent braking-force control device A load-dependent braking force control device operable responsively to initial brake actuating pressure for initiating a light brake application until such pressure attains a certain predetermined higher valve, whereupon the control device, which is subje... | 04/13/1982 |
| 4305623 | Hydraulic brake controller A hydraulic controller for providing regulated transfer of pressurized fluid between a tank (T), an accumulator (A) serviced by a source of pressurized fluid (PS), and the brakes (B) of a vehicle including a housing (36,37; 236,237), an actuator plunger (... | 12/15/1981 |
| 4291923 | Empty and load brake device An empty and load brake device for a railroad vehicle air brake system for controlling brake application pressure comprises a housing having an inlet connected to a pressure source and an outlet connected to an air brake cylinder. There is a first passage... | 09/29/1981 |
| 4260197 | Spool type brake valves Spool type brake valve for use in motor vehicle braking systems. The valve has an exhaust valve assembly and an inlet valve assembly. The former having a spool displaceable by a brake pedal or the like to disconnect the brake-port from an exhaust port and... | 04/07/1981 |
| 4236763 | Brake valve especially for motor vehicles A brake valve for a control piston actuatable at will, which shifts a double valve by way of a spring that closes off a flow connection between a working pressure space and a supply reservoir for pressureless brake medium and which during the further move... | 12/02/1980 |
| 4172619 | Follow-up hand control valve for use with hydraulic spring brakes A pressure control valve for controlling the operation of spring-actuated fluid pressure released brake units in vehicle braking systems. The valve described requires less operating effort than for conventional control valves of this kind even those inclu... | 10/30/1979 |
| 4134418 | Manual fluid pressure controller A manual fluid pressure controller has a handle with integral cam which mates with a non-rotating cam follower. Rotation of the handle causes displacement of the cam follower which transmits a force through a metering spring to a metering piston. The mete... | 01/16/1979 |
| 4113320 | Brake valve device This invention relates to a brake valve device having a fluid pressure operated relay valve device for varying the pressure in a train brake pipe in accordance with the degree of fluid under pressure supplied to an equalizing reservoir and the relay valve... | 09/12/1978 |
| 4090533 | Fluid valve assemblies In a power control valve assembly in which the position of an inlet valve member relative to its seat is controlled by a control rod extending through a passage terminating in the seat, an end portion of the control rod has a profile which gives a variabl... | 05/23/1978 |
| 4050746 | Inversion brake valve and system therefor A pneumatic brake system employing dual-diaphragm, spring-actuated, air-released brake actuators is provided with an inversion valve which, in the event of a brake system failure, prevents the brakes from being automatically applied while permitting contr... | 09/27/1977 |
| 4038999 | Hydraulic pressure control valve A hydraulic pressure control valve has a piston slidably disposed in a bore of a housing and having a supplying pressure chamber therein which is communicated with a source of hydraulic pressure, an actuating pressure space defined in the bore for communi... | 08/02/1977 |
| 3977425 | Hydraulic pressure control valve A hydraulic pressure control valve has a piston slidably disposed in a bore of a housing and having a supplying pressure chamber therein which is communicated with a source of hydraulic pressure, an actuating pressure space defined in the bore for communi... | 08/31/1976 |
