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| Number | Title | Issue Date |
| 7429087 | Air system instalation to be applied in tractors, combine harvesters, crop-sprayers, sewers, grain augers, hoppers, trailers, wagons, carts and towing vehicles to support and transport different kinds of cargos such as cereals The present invention includes a pneumatic system for an agro-industrial vehicle including an air compressor, a dual circuit foot valve connected to the air compressor, and at least two air storage tanks connected to said dual circuit foot valve. The operation of th... | 09/30/2008 |
| 7367634 | Relay configuration for an electro-pneumatic train A relay valve configuration which can be used with various cars in an electropneumatic train and under the control of one of the electropneumatic brake control valves. The improved brake control valve includes a relay valve mounted at an interface of the manifold. T... | 05/06/2008 |
| 7350878 | Relay configuration for an electro-pneumatic train A relay valve configuration which can be used with various cars in an electropneumatic train and under the control of one of the electropneumatic brake control valves. The improved brake control valve includes a relay valve mounted at an interface of the manifold. T... | 04/01/2008 |
| 7337041 | Feedback control methods and apparatus for electro-pneumatic control systems Methods and apparatus related to feedback control for electro-pneumatic control systems are disclosed. An example electro-pneumatic control system comprises an electro-pneumatic controller and a secondary pneumatic power stage coupled to the electro-pneumatic contro... | 02/26/2008 |
| 7300118 | Electronic park brake valve system for air brakes vehicles A vehicle brake system includes a source of fluid pressure adapted to supply a braking force a brake actuator including a parking brake chamber, and a combination valve fluidly coupling the brake actuator to the source of pressure, the combination valve having an in... | 11/27/2007 |
| 7097261 | Modulator A modulator comprising an inlet, an exhaust and an outlet, the modulator comprising a piston moveable in response to a control pressure in a control chamber to vary to supply of fluid under pressure to the outlet, wherein the modulator comprises a first end face and... | 08/29/2006 |
| 7077481 | Spring brake modulating relay valve A combined spring brake modulating relay valve integrates the functions of a relay valve and a modulating valve. The housing includes a valve assembly movable in response to air pressure provided to selected ports in the housing. A relay piston selectively communica... | 07/18/2006 |
| 7018004 | System and method for brake pre-charging A system and method for brake pre-charging includes pre-filling brakes, based on proximity information from a forward-looking sensor, to reduce the initial delays associated with braking. By reducing the initial delay in converting driver brake pressure requests int... | 03/28/2006 |
| 6953228 | Actuating 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 |
| 6910744 | Control device for compressed-air brakes The invention relates to a control device for compressed-air brakes having a control valve, comprising a housing, a piston rod, a piston, a second piston, a double-seat valve, having a control element, having a supply air reservoir, having a control chamber, having ... | 06/28/2005 |
| 6866346 | Actuating 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 |
| 6769744 | Spring brake modulating relay valve A combined spring brake modulating relay valve integrates the functions of a relay valve and a modulating valve. The housing includes a valve assembly movable in response to air pressure provided to selected ports in the housing. A relay piston selectively communica... | 08/03/2004 |
| 6132009 | Remote brake application valve The present invention is a valve system for exhausting air from a brakepipe in a remote portion of a train. It has a pressure containment structure having a cylindrical bore and a piston mounted in the bore. A first valve chamber is on one side of the pis... | 10/17/2000 |
| 5934764 | Method for limiting brake cylinder pressure on locomotives equipped with distributive power and electronic brake systems Method and apparatus for limiting brake cylinder pressure in emergency braking of a locomotive consist connected to a train of railway cars. The apparatus includes a manifold device connected to a reservoir of pressurized fluid for operating pneumatic bra... | 08/10/1999 |
| 5897174 | Braking system A braking system for a vehicle includes a pressure relief valve which rids the -system of moisture and liquid therein. The braking system includes a controller which is in fluid communication with the vehicle brakes, an air source, and an air signal that ... | 04/27/1999 |
| 5666995 | Pilot relay valve including means to control flow through a balance orifice A pilot operated relay valve (10) for an air pressure braking system includes a relay piston (16) which is responsive to the pressure at a control port (20) to open the valve (10) so that it's inlet port (38) is in free communication with it's outlet port... | 09/16/1997 |
| 5564794 | Train brake pipe pressure exhaust control system and regulating valve therefor A brake pipe pressure control system for a railroad train including a regulating valve device under control of a microprocessor wherein the regulating valve device is housed in the existing end-of-train device and effects service and emergency reductions ... | 10/15/1996 |
| 5553928 | Simplified full-function valve for heavy duty brake systems A simplified integrated full-function valve for heavy duty brake systems comprising a valve body having individual ports for fluid communication with spring brake chambers, service brake chambers, pressurized-air reservoir and exhaust and for receiving pr... | 09/10/1996 |
| 5458402 | Fail safe work brake system A work brake system applies a reduced air pressure service brake application as a work brake to hold a heavy duty vehicle in place without actuation of conventional spring brakes during frequent start-and-stop operations of the vehicle, such as in refuse ... | 10/17/1995 |
| 5429426 | Brake cylinder pressure relay valve for railroad freight car A relay valve device for a relayed type brake system in which the compressed air of the auxiliary reservoir is connected to an equalizing reservoir instead of directly to the brake cylinder, as in a conventional system. Since the equalizing reservoir volu... | 07/04/1995 |
| 5409303 | Full function skid control braking system for vehicles A full function skid control valve assembly for use in an air brake system which provides for brake control utilizing a compact single assembly. The system provides for the maintenance of certain minimum operating pressures so that, when the air pressure ... | 04/25/1995 |
| 5346291 | Fluid pressure control valve with valve member mounted on guide pin slidably carried by piston A fluid pressure responsive valve includes a valve member mounted on a guide pin slidably carried by a piston. A valve guide is engaged by one side of the valve element, and the piston engages the opposite side. The piston controls the valve member. The v... | 09/13/1994 |
| 5340212 | Proportioning relay valve disabled by failed front braking circuit A fluid pressure braking system for a tractor-trailer combination vehicle includes a proportioning relay valve which controls communication to the rear wheel brakes of the tractor. When the tractor pulls a trailer, the proportioning control within the rel... | 08/23/1994 |
| 5340203 | Variable load control valve with dual diaphragms reinforced by washers and spacer members A diaphragm-type of variable load control valve device having a diaphragm piston assembly for effectively providing pressurized fluid to the brake cylinders of a railway vehicle in accordance with the brake demand established by a vehicle operator and at ... | 08/23/1994 |
| 5333941 | High pressure valve for railway car brake control valve device A spool type valve arrangement in which a booster spring is employed to overcome static friction of the spool valve O-rings and thereby assure prompt actuation of the spool valve member. The arrangement is such that the booster spring is only active throu... | 08/02/1994 |
| 5318354 | Proportional control valve with differential sensing area An electrically actuated valve for regulating a working pressure of a closed volume load includes an inlet valve (24) for controlling fluid flow between a supply port (16) and a working port (18) and an outlet valve (26) for controlling fluid flow between... | 06/07/1994 |
| 5277484 | Relay valve arrangement A relay valve arrangement useful in an ABS system comprises a relay valve, a source of control pressure, a control pressure circuit, a control chamber which receives the control pressure from the control pressure circuit and thereby determines the configu... | 01/11/1994 |
| 5261458 | Pilot relay valve with load piston A relay valve for a fluid pressure braking system includes a relay piston and a load piston which is responsive to the pressure at the inlet port of the relay valve to exert a biasing force on the relay piston loading the latter against the inlet/exhaust ... | 11/16/1993 |
| 5190357 | Air-actuated brake system for vehicles The preferred embodiment of the invention is a brake system comprised of a primary source of air under pressure, and independent secondary source of air under pressure, a primary relay, a secondary relay valve, a device for actuating the service brakes, a... | 03/02/1993 |
| 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 |
| 5046786 | Combination brake valve module A pressurized fluid control module is provided for a tractor-trailer brake system to effect the appropriate braking function. The pressurized fluid control module is combined with pressure inlet fittings for the introduction of a pressurized fluid, a plur... | 09/10/1991 |
| 5004300 | Electronic braking system A vehicle braking system wherein, for avoiding serious brake unbalance under fault conditions which would cause either loss of braking or excessive braking at one wheel, a small bore link pipe is arranged to connect the pressure control elements, for exam... | 04/02/1991 |
| 4941510 | Relay valve for pneumatic or hydraulic application A valve including a housing in which is disposed a relay piston. The relay piston has an upper control surface adjacent a control chamber leading to a control connection. The underside of the relay piston is in communication with a reaction chamber leadin... | 07/17/1990 |
| 4926907 | Relay valve for pneumatic or hydraulic application A valve including a housing in which is disposed a relay piston. The relay piston has an upper control surface adjacent a control chamber leading to a control connection. The underside of the relay piston is in communication with a reaction chamber leadin... | 05/22/1990 |
| 4915456 | Compact, integrated, multi-function brake valve The compact, integrated, multi-function valve employed in semi-trailer brake systems having a plurality of pressurized air reservoirs comprise a plurality of internal passageways and ports communicating externally, a plurality of internal control means fo... | 04/10/1990 |
| 4915458 | Relay valve apparatus A relay valve apparatus having two relay valves are located in a single housing with their longitudinal axes parallel to one another. The two relay valves each include a double seat valve and a relay piston. The two relay valves are located one behind the... | 04/10/1990 |
| 4856851 | Relay and booster valves for air brake systems The relay valve employs a body preferably of metal defining a central exhaust port and a pair of delivery ports on the bottom of the valve body as well as a supply port on the side thereof. The body defines a cylinder in which a spool or shuttle moves tow... | 08/15/1989 |
| 4786116 | Trailer control valve device for the trailer brakes of a tractor-trailer vehicle A brake pressure control valve for regulating the braking pressure in the trailer brake system of a tractor-trailer vehicle, so as to develop the trailer brake pressure to a preset level ahead of the braking pressure in the tractor brake system during a p... | 11/22/1988 |
| 4776648 | Relay valve assembly A relay valve is provided within a single housing and includes a brake cylinder relay valve with combined highway override, a dual pressure brake cylinder limiting valve responsive to load, highway supply line and rail supply line charge check valves and ... | 10/11/1988 |
| 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 |
