Abstract: A brake control system for a landing gear of an aircraft is provided. The system includes a first control channel for providing brake control signals to one or more brakes on the landing gear, and a second control channel for providing brake control signals to another one or more brakes on the landing gear. At least one of the first control channel and the second control channel is configured to act as an executive in monitoring braking efforts applied by the one or more brakes as compared to braking efforts applied by the another one or more brake, and to cause the braking efforts of at least one of the one or more brakes or the another one or more brakes to be modified in an effort to equalize the braking efforts.

Abstract: A vehicle brake system includes: brakes provided for respective right-side wheel, left-side wheel, front wheel and rear wheel of a vehicle, and configured to restrain rotations of the respective wheels by activations of brake actuators of the brakes; and at least two energy sources independent from each other and configured to supply energy to the brake actuators. A first brake line includes (a) a first energy source as one of the at least two energy sources and (b) one of the brake actuators provided for the front wheel and activatable by the energy supplied from the first energy source. A second brake line includes (c) a second energy source as one of the at least two energy sources and (d) three of the brake actuators provided for the respective right-side, left-side and rear wheels and activatable by the energy supplied from the second energy source.

Abstract: A mechanism for reducing brake noise during braking of a vehicle. The mechanism includes controllers and methods that “hold” a currently applied braking torque rather than applying the operator-requested braking torque when a vehicle is traveling at a low speed and the operator-requested braking torque is within a predetermined range. The controllers and methods “release” the previously “held” braking torque and apply the operator-requested braking torque once the operator-requested braking torque is outside the predetermined range.

Abstract: In a dual-circuit hydraulic motorcycle brake system with two hand or foot-operated master cylinders, at the commencement of the pump operation in one of the brake circuits, the change-over valve (20) and/or the separating valve (19) of that brake circuit assume a switching position in which the pressure which can be generated by the pump (9) is prevented from causing a reactive effect on the associated hand-operated or foot-operated master brake cylinder (7, 13). To this end, the separating valve (19) in the brake line may be switched to a closed or throttling position, while the change-over valve (20) in the suction path is closed. Alternatively, both the change-over valve (20) and the separating valve (19) can be opened at the same time so that the pump conveys brake fluid in a circle.

Abstract: Disclosed herein is an electro-hydraulic brake system. The electro-hydraulic brake system includes a master cylinder having a first cylinder and a second cylinder, a hydraulic power unit to supply brake oil into the respective first and second cylinders, and a first wheel and a second wheel connected respectively to the first cylinder and the second cylinder. The first wheel and the second wheel are independently controlled by hydraulic pressure generated in the first cylinder and the second cylinder.

Abstract: This is a new brake system for minimizing the turning radius of a vehicle when it makes a U-turn or parks. The minimum turning radius of a conventional vehicle has a certain limit because a conventional vehicle takes the Ackerman-Jeantaud steering principle. The object of this invention is to overcome the limit of the minimum turning radius by introducing the new concept, the one wheel brake system. This invention utilizes the phenomenon that if one wheel is braked, the other wheel is driven by the differential gear. Hence the vehicle circles around a braked wheel as its pivot. So it turns much smaller than the minimum turning radius of the Ackerman-Jeantaud steering angle.

Abstract: A dual hydraulic booster assembly for a braking system of a tractor or like vehicle has a logic valve operable in a first mode to control the supply of pressure fluid for braking on one side of the vehicle to facilitate steering, and in a second mode of operation to control the supply of fluid pressure for braking on both sides of the vehicle for full vehicle retardation. A pressure amplifier valve may be provided to increase the pressure of the pressure fluid from the logic valve for braking in the second mode of operation. The logic valve and amplifier valve may be incorporated into the booster assembly to provide an integrated unit.

Abstract: A brake system for a motor vehicle selectively brakes single or multiple wheels. The brake system includes a hydraulic master cylinder which is actuated by a brake pedal and which is connected by an electrically controlled valve arrangement to hydraulically operated brakes on both sides of the vehicle. The brake system also includes an electric switching device for controlling the valve arrangement in order to selectively connect the master cylinder with the brakes of both sides of the vehicle or with a brake on one side of the vehicle The electrical switching device includes a manually operated, spring centered rocker switch which can be switched from a central position into two deflected positions.

Abstract: An AND-type control valve useful in a vehicle braking system to prevent application of the vehicle brakes when only the right-hand or left-hand vehicle brakes are applied for the purpose of steering the vehicle. The control valve has two input flowpaths corresponding to the hydraulic braking circuit on different sides of the vehicle and a control output port for connection to the vehicle brake valve. Each input flowpath contains a non-return valve having associated therewith a flow sensitive device to provide a restricted flowpath which gives rise to a pressure drop which will tend to close or assist in closure of the non-return valve. A device is provided to prevent simultaneous closure of both non-return valves.

Abstract: A braking system for a vehicle having wheels provided with braking devices, the system causing carbon brakes to wear less than do conventional systems.

Abstract: An off-road vehicle has ground supports on each side which can be simultaneously braked, or independently braked to aid in steering. A braking system includes a brake valve device which feeds high fluid pressure to a pair of reversing valves. The reversing valves deliver the high pressure to respective wheel brake cylinders disposed on opposite sides of the vehicle. The reversing valves and brake valve device are controlled by a common pedal which comprises separately or simultaneously actuable half-pedals. Each half-pedal actuates the brake valve device and a respective reversing valve such that when both half-pedals are depressed the system operates in a dual-sided braking mode, and when only one half-pedal is depressed the system operates in a braked-steering mode. The system can be shifted directly from the dual-sided braking mode to a brake-steering mode by simply releasing one of the half-pedals without having to first release all braking action.

Abstract: In a motorcycle with a pair of left and right steps mounted in a projecting manner on a lower portion of a vehicle body, a pair of left and right brake pedals capable of independently operating the rear wheel brake are pivoted on the vehicle body in close vicinity to the left and right steps, respectively. When a driver turns the motorcycle in either left or right direction with his one foot being placed on the ground, the driver can operate the rear wheel brake using the opposite foot.

Abstract: A brake source select system for selecting one of a plurality of sources of pressurized hydraulic fluid for use in actuating a brake system. The brake source select system (10) includes a primary, secondary and reserve source (20, 22 and 24) of pressurized hydraulic fluid connected in fluid communication respectively to a primary selector valve (32), a secondary selector valve (96) and a reserve selector valve (102). Pressurized hydraulic fluid from the primary source (20) is applied to deselect ports (94 and 100) on the secondary and reserve selector valves, causing those valves to block fluid flow from their associated sources to the brake system, so long as the primary source is operative.

Abstract: According to the invention, the braking system includes two tandem master cylinders (100, 200), the first (100) having a first pressure chamber (110) connected to the left brake (132) of the tractor and a second pressure chamber (112) connected to the trailer brakes (300), and the second having a first pressure chamber (210) connected to the right brake (232) of the tractor and a second pressure chamber (212) likewise connected to the trailer brakes (300). The invention may be utilized with certain vehicles, in particular agriculture tractors.

Abstract: A selector valve for a vehicle braking system in which brakes mounted on opposite sides of the vehicle can be operated selectively either together or independently, comprises an operating lever (9) for displacing a valve spool (2) to control communication between inlet ports (3,4) and outlet ports (5,6), the lever being guided by a slot (8) which includes latching notches (20) in which the lever is engageable to preselect a particular steering mode of brake operation. The lever is automatically disengaged from the notches after each brake operation by a piston (15) which is actuated by the fluid pressure in a chamber (16) connected to an inlet port (4).

Abstract: A supplemental brake system operates in cooperation with a motor vehicle's extant emergency brake system for selectively slowing a spinning wheel. A selector valve communicates with the vehicle's vacuum system and conduits are sized to cause a delay in the slowing of the spinning wheel. Further, the system provides for the gradual extension of the emergency brake cables which is unaffected by changes in vacuum levels in the vacuum system. The operator has full control of the vehicle during the system's operation.

Abstract: A steering-brake control system for a vehicle in which solenoid operated control valves associated with the respective wheels of at least one axle are normally maintained in an open position, so long as the valve solenoid operators are deenergized. Braking pressure is produced when either one of a right and left brake pedal is operated. Switches associated with each pedal are effective to energize the solenoid of one wheel control valve to cut off brake pressure to that particular wheel, so that only the one wheel corresponding to the operated brake pedal is braked to cause the vehicle to turn in that direction for steering control in off-street operation. In the event both brake pedals are operated, the switches and valves operate to admit brake pressure to each wheel brake cylinder for normal braking during on-street operation.

Abstract: In a dual hydraulic braking system in which brakes on opposite sides of a vehicle can be applied simultaneously for retarding or independently for steering the vehicle, a dual control valve assembly ensures that the brakes on one side cannot be applied before the brakes on the opposite side. When the brakes on one side are to be applied independently, a stem carrying inlet and exhaust valve heads moves with a pedal-operated piston so that the exhaust valve head engages with a valve spool to close an exhaust passage. The spool moves with the piston and head until it is arrested by a stop face, whereafter a seating on the piston moves away from the inlet valve head to allow pressurized fluid to be supplied to the outlet for the brakes. When the brakes are to be applied simultaneously, a volume of fluid trapped in a transfer connection between the exhaust valve heads arrests movement of the spools to ensure that the inlet valves open simultaneously.

Abstract: Locking system for two brake pedals of a motor vehicle such as a tractor, for enabling joint and separate actuation of opposite wheel pairs of the type wherein a bolt is utilized to couple the pedals. In accordance with a preferred embodiment, the bolt is spring biased into a locked position and is operable by the foot of the driver so as to be shifted into an unlocked position. These positions are assumed through the use of stops that are staggered with respect to one another both radially and axially and are mounted so as to be brought into contact with a side wall of one of the pedals by rotational and axial movements of the bolt.

Abstract: A system for selectively controlling the flow of brake fluid to the brakes of a two or four wheel drive vehicle utilizes a separate solenoid valve on each brake fluid line leading directly to a driven wheel. The valves are normally open, and are operated by primary and secondary electrical switches arranged in series. The primary electrical switch must be physically depressed and held to be activated and the secondary switch which is separately connectible to each solenoid valve, is actuated by the primary switch in such a manner as to separately activate each solenoid valve to control the flow of brake fluid to the brake of each drive wheel.

Abstract: In a control valve assembly for vehicle hydraulic braking systems pressurization of a distributor chamber in a housing is controlled by a valve operating mechanism. The valve operating mechanism comprises a piston working in the distributor chamber, a recuperation port in the wall of the housing for connection to a reservoir for fluid and communicating with the chamber on one side of the piston, an axial bore through the piston providing communication between the recuperation port and an inlet passage for connection to a source of high pressure fluid, an axially movable valve member for alternate engagement with first and second axially spaced seatings, the first seating comprising a seating surrounding the opening in the piston and the second seating leading to the inlet passage, and a spring for urging the valve member normally into engagement with the second seating with the valve member spaced from the first seating.

Abstract: In a two-pedal hydraulic braking system for vehicles the pedals are operable independently or simultaneously to apply two sets of brakes and both pedals actuate a common master cylinder to apply fluid under pressure to the brakes. Two normally closed selector valves are operable independently to direct the fluid to either of the sets of brakes when one pedal is operated, and the valves are operable simultaneously to direct the fluid to both sets when the pedals are operated simultaneously. Each valve is urged directly into its closed position by its respective pedal, and each pedal in turn is urged by a return spring into a retracted position in which the valve which it operates is closed.

Abstract: A circulating system for hydraulic brakes having a master cylinder, reservoir for supplying fluid to the master cylinder, a wheel cylinder, and a fluid line connecting the master cylinder with the wheel cylinder. The circulating system includes a pump connected in a fluid line from the reservoir to the bleedoff port of the wheel cylinder. A check valve is connected between the pump and wheel cylinder to allow flow only in the direction from the wheel cylinder to the master cylinder. The pressure exerted by the pump is insufficient to cause braking. The check valve allows conventional braking by the master cylinder while the pump maintains a supply of fluid.

Abstract: A brake mechanism comprises a cylinder body having a large chamber and a small chamber, a power piston movably positioned in the large chamber and dividing it into a control chamber and a vacuum chamber in communication with each other, a hydraulic piston and a control valve having a communication orifice both of which are positioned in said small chamber of the cylinder body and moved by a power piston to divide the small chamber into a high pressure chamber communicating with a driving wheel brake cylinder, a buffer chamber having a communication opening for selectively communicating the buffer chamber with a brake cylinder in accordance with the operation of the control valve and a control chamber, a relay valve cylinder communicating at one end with air and at the other end with the vacuum chamber and having a communication orifice open to the control chamber in the large chamber, a relay valve piston provided within a relay valve cylinder such that it can be operated by a movable core of an electromagnet