| Patent Number |
Title Of Patent |
Date Issued |
| RE31387 |
Anti-skid vehicle braking system |
September 20, 1983 |
| In a fluid pressure-operated anti-skid braking system for rail and other vehicles operating fluid from a supply for actuating a wheel brake is supplied to the brake through a fluid-flow control valve interposed in the line between the supply and the brake. Deceleration responsive sensors |
| RE30255 |
Sliding caliper disc brakes |
April 8, 1980 |
| In a disc brake such as a sliding caliper disc brake, the caliper is mounted for movement with respect to a torque plate by pin assemblies extending into aligned openings in the caliper and torque plate. The pin assemblies are of multi-part construction, parts of the pin assemblies w |
| RE29582 |
Disc brakes and mounting structure therefor |
March 21, 1978 |
| The invention concerns disc brakes of the kind in which only one of the friction elements is directly moved into engagement with the brake disc or other rotor, the other friction element being displaced as a result of reaction forces set up by such engagement and for this purpose being |
| RE28890 |
Actuator assemblies for hydraulic braking systems |
July 6, 1976 |
| In an actuator assembly for an hydraulic braking system the effective volume of a chamber through which hydraulic fluid under pressure is supplied to a wheel brake is adapted to be varied between a minimum and a maximum value by movement of a piston assembly working in a bore in comm |
| RE28881 |
Brake adjusters |
June 29, 1976 |
| An automatic adjuster comprises a mechanism of adjustable length operative between a hydraulic brake piston and either a cylinder or an opposed piston. A cam journalled in the cylinder or the opposed piston serves to apply the brake mechanically (hand brake) and act as a stop for the |
| D250948 |
Liquid reservoir primarily for use in a vehicle braking system |
January 30, 1979 |
|
| 4548037 |
Hydraulic power boosters for vehicles braking systems |
October 22, 1985 |
| In an hydraulic booster a load applied to a master cylinder assembly through the booster is fed back to a pedal-operated input piston through a reducer mechanism. This provides, when a booster chamber for operating a boost piston is pressurized by boost pressure, a reaction of "feel" at |
| 4474004 |
Power-operated boosters |
October 2, 1984 |
| A pedal-operated booster incorporates a valve mechanism for controlling pressurization of a boost chamber. The valve mechanism comprises a pedal-operated piston and a pressure-responsive valve spool which is coupled to the piston for limited relative movement in a longitudinal direct |
| 4382364 |
Hydraulic braking systems for vehicles |
May 10, 1983 |
| In a power braking system for a vehicle a supply of fluid from a power source is utilized to augment the output pressure to be supplied to a brake from a pedal-operated brake control valve assembly. The power source comprises a source of hydraulic fluid of a type different from that whic |
| 4377221 |
Hydraulic anti-skid systems for vehicle |
March 22, 1983 |
| In an hydraulic anti-skid braking system a pump having a liquid throughput which is adapted to increase with the rotational speed of the wheel is arranged to control operation of a modulator valve assembly for relieving the pressure supplied to the brake when the deceleration of a wheel |
| 4360238 |
Control valve assembly |
November 23, 1982 |
| A fluid pressure braking system is disclosed which includes an hydraulic actuator connected to a vehicle brake and a pressure actuator for operating the hydraulic actuator and which is connected to a fluid pressure reservoir via a brake control valve. An auxiliary valve having an inl |
| 4350230 |
Drum brakes for vehicles |
September 21, 1982 |
| A drum brake is disclosed in which at least two, and preferably four, friction pad assemblies are symmetrically arranged with respect to the drum. The pad assemblies are slidably guided for movement towards and away from the drum in a substantially radial direction on drag-taking abutmen |
| 4324101 |
Hydraulic master cylinders for vehicle braking systems |
April 13, 1982 |
| A tandem master cylinder is disclosed having primary and secondary pistons which are freely movable apart, the pistons defining one wall of respective pressure chambers connected to primary and secondary braking circuits. The ratio of the effective areas of the piston are selected to |
| 4320623 |
Fluid-pressure operated boosters for vehicle braking systems |
March 23, 1982 |
| In a servo-motor assembly for a vehicle braking system a valve controlling the servo pressure is operated by an operating assembly comprising an angularly movable rotary operating member, an axially movable transmission member for applying an operating force to the rotary member, and a c |
| 4314731 |
Control valve assembly |
February 9, 1982 |
| A control valve assembly for a vehicle braking system comprises an inlet, an outlet, a valve having a pressure operated relay member movable to open and close the valve to control communication between the inlet and the outlet, and an inertia-responsive device, preferably a pendulum, |
| 4313302 |
Hydraulic power boosters for vehicle braking systems |
February 2, 1982 |
| An hydraulic booster in which a control chamber is defined between an input piston and a second piston relative to which the input piston is movable, and recuperation valve for controlling communication between the control chamber and a reservoir is located in the control chamber. The |
| 4301895 |
Disc brakes for railway vehicles |
November 24, 1981 |
| A disc brake comprises a rigid caliper which straddles the peripheral edge of a rotatable disc, and friction pads for engagement with the disc are located in the caliper. One pad is applied directly to the disc by an actuator which is provided in adjacent limb of the caliper, and the oth |
| 4295548 |
Brake actuator |
October 20, 1981 |
| A helical thrust bearing (14) is arranged between two rotatable cam components (12 and 13) of a brake actuator. The cam component (13) is turned first while the brake slack is being taken up and the brake-applying force is relatively low, the reaction to such force being transmitted |
| 4289358 |
Vehicle braking systems |
September 15, 1981 |
| An arrangement for varying a pre-load on a control valve of a vehicle braking system in dependence upon vehicle loading includes a low frequency vibration sensor or an accelerometer for sensing the oscillation frequency of a sprung part of the vehicle and providing an output signal, pref |
| 4283992 |
Servo boosters |
August 18, 1981 |
| A vehicle brake system in which an output member is axially displaceable by the application of differential fluid pressure, under the control of a valve operable by an input member, across a movable internal wall which divides a housing of the booster into a pair of fluid chambers. D |
| 4273516 |
Pumps for fluids |
June 16, 1981 |
| A pump assembly for an hydraulic braking system comprises a housing having an inlet for connection to a tank for liquid, an outlet for connection to an hydraulic accumulator, and a piston reciprocably mounted in a bore in the housing to draw liquid into a working chamber during an induct |
| 4273358 |
Suspension means for vehicles |
June 16, 1981 |
| An hydro-pneumatic suspension device comprises a pressure chamber and a working chamber which are separated from each other by a first diaphragm. The pressure chamber contains a trapped volume of gas under pressure for supporting the load on a wheel or axle, the working chamber contains |
| 4270808 |
Anti-lock brake control systems for multi-axle vehicles |
June 2, 1981 |
| Anti-skid brake control systems are described in which anti-skid brake control modules associated with the braked axles are each provided with a failsafe circuit and these failsafe circuits are connected in cascade fashion to form a chain so that an input signal applied to a first fa |
| 4270632 |
Internal shoe drum brakes |
June 2, 1981 |
| An internal shoe drum brake comprises a pair of brake shoes, an adjustable length strut extending between the shoes and having a ratchet movement of which adjusts the length of the strut, an actuating lever pivotally connected to one end of the strut and engaging one shoe, the lever bein |
| 4270353 |
Servo boosters for vehicle brake systems |
June 2, 1981 |
| In order to reduce the distortion of a servo booster housing in use the booster is provided with one or more force transmitting means which extend through the movable wall for transmitting reaction forces directly from the master cylinder housing to the vehicle bulkhead between which the |
| 4269454 |
Anti-skid brake control system |
May 26, 1981 |
| An anti-skid brake conrol system includes a sensor which produces a signal proportional to the acceleration of a braked wheel and a comparator that responds to the acceleration signal by producing a signal which undergoes a step change at set acceleration levels so as to divide successiv |
| 4261688 |
Hydraulic pressure converters |
April 14, 1981 |
| An hydraulic pressure converter comprises a differential piston which works in a stepped bore in a housing. A pressure space is defined in the housing at the end of a portion of the piston which is of smaller area so that reciprocation of the piston in the bore causes hydraulic fluid to |
| 4261443 |
Disc brakes for vehicles |
April 14, 1981 |
| In a vehicle disc brake of the single sided sliding reaction caliper type the drag on the friction pad assemblies is taken by a drag-taking member. The caliper is slidably mounted for movement relative to the disc on a guide in the form of a single pin which is located on the same side o |
| 4260201 |
Hydraulic anti-skid systems for vehicles |
April 7, 1981 |
| In an hydraulic anti-skid braking system a pump having a liquid throughput which is adapted to increase with the rotational speed of the wheel is arranged to control operation of a modulator valve assembly for relieving the pressure supplied to the brake when the deceleration of a wheel |
| 4260200 |
Anti-lock brake control system |
April 7, 1981 |
| An anti-lock brake control system for a vehicle with braked wheels comprises a sensor to produce a signal proportional to the deceleration/acceleration of the braked wheel, a deceleration sensing switch to respond to the deceleration/acceleration signal by producing a brake pressure |
| 4256016 |
Servo booster for vehicle braking systems |
March 17, 1981 |
| In a tandem servo booster provided with a pair of ties extending through the housing and diaphragm assemblies for transmitting braking reaction forces from the master cylinder housing directly to the vehicle bulkhead, the ties are tubular and are provided with axially spaced ports to pro |
| 4252599 |
Bonding of friction lining to shoe platforms |
February 24, 1981 |
| A fixture for use in bonding friction linings to platforms of brake shoes comprises an arcuate support against which the lining and the platform are compressed together by a spring assembly acting on the web of the shoe. The fixture preferably accommodates two opposed shoes simultaneousl |
| 4248328 |
Sliding caliper disc brake |
February 3, 1981 |
| The present invention is concerned with a sliding caliper disc brake having a torque member and a caliper incorporating at least one hydraulic actuator. The caliper is attached to the torque member for sliding movement relative thereto and is arranged to act on a pair of friction pad |
| 4246831 |
Fluid-pressure operated servo-motor assemblies |
January 27, 1981 |
| A fluid-pressure operated servo-motor assembly transmits an effort from a pedal to a master cylinder for wheel brakes. The assembly includes in a housing, a pedal-operated input member, an output member acting on the master cylinder and a movable wall for transmitting the effort between |
| 4245868 |
Control valve assembly |
January 20, 1981 |
| A control valve assembly for a vehicle braking system comprises an inlet, an outlet, a proportioning valve having a control valve member movable to open and close the valve to control communication between the inlet and the outlet, and an inertia-responsive device, preferably a pendulum, |
| 4241583 |
Fluid-pressure operated servo-motor assemblies for vehicle braking systems |
December 30, 1980 |
| In a servo-motor assembly for a vehicle braking system a valve controlling the servo pressure is operated by an operating assembly including a rotary valve actuator positioned between a pedal-operated input member and an abutment member. The valve actuator is axially movable through a li |
| 4240330 |
Servo booster assemblies |
December 23, 1980 |
| Servo boosters for vehicle hydraulic braking systems are described which incorporate a novel arrangement for providing an increasing reaction force on the input member in response to an increasing output force. In the novel arrangement a first thrust assembly is interposed between the in |
| 4239296 |
Control valve assemblies |
December 16, 1980 |
| A control valve assembly for a vehicle braking system, comprises a valve controlling communication between an inlet and an outlet, the valve having a valve seat carried by a control piston and an inertia-responsive member, preferably a ball, movable into engagement with the valve seat to |
| 4236612 |
Friction pad assemblies for rail vehicle brakes |
December 2, 1980 |
| A friction pad assembly for a rail vehicle brake comprises a pad of friction material carried by a rigid backing plate, and the backing plate is detachably mounted on a shoe. A part-circular notch at one end of the shoe receives the stem of a headed stud which acts as an abutment for tha |
| 4234061 |
Disc brakes for vehicles |
November 18, 1980 |
| In a vehicle disc brake a pair of friction pad assemblies are adapted to be applied simultaneously to the respective inboard and outboard faces of each of a pair of relatively fixed, axially spaced, rotatable discs by an actuator assembly. The actuator assembly comprises a pair of first |
| 4233599 |
Malfunction detector for speed sensors |
November 11, 1980 |
| A system is disclosed for monitoring operation of a speed sensor which produces a pulse signal with a repetition frequency related to the speed being sensed.An analogue speed signal is derived from a pulse signal having a repetition frequency related to the sensed speed and is fed to an |
| 4232909 |
Vehicle load sensing assemblies |
November 11, 1980 |
| A vehicle load-sensing assembly for use with a vehicle fluid-pressure braking system comprises an input member subjected to a force in a road spring and a valve which has a movable valve member for controlling the flow of fluid through the valve. A thrust transmitting mechanism is lo |
| 4232520 |
Actuator assemblies for vehicle hydraulic braking systems |
November 11, 1980 |
| A power operated actuator assembly incorporates a stop mechanism for opposing movement of an actuating member if a booster fluid supply is operative. The stop mechanism comprises a chamber which is supplied with a metered proportion of pressurized fluid when the actuating member is moved |
| 4231224 |
Master cylinder assemblies for vehicle hydraulic braking systems |
November 4, 1980 |
| In a master cylinder assembly of the kind in which transfer chambers in pedal-operated master cylinders are connected by a transfer passage, each master cylinder has a transfer valve which is normally open and which is movable into a closed position to isolate the transfer chamber of tha |
| 4230376 |
Anti-lock brake control system II |
October 28, 1980 |
| In an anti-lock brake control system for a vehicle with braked wheels, a brake pressure release pulse is produced in a manner dependent on wheel deceleration and is processed so that it cannot exceed a preset maximum length and is spaced from any other brake pressure release pulses by a |
| 4225192 |
Antiskid control valve |
September 30, 1980 |
| A pendulum responsive to excessive deceleration operates a valve which creates a pressure differential across a pressure responsive member to close an inlet valve to the brake chamber and expand an outlet chamber to thereby reduce the rear brake pressure. The invention provides retaining |
| 4225017 |
Disc brake and support structure therefor |
September 30, 1980 |
| A disc brake having a caliper member which straddles a minor portion of the periphery of a rotatable disc and which is displaceable with respect to a fixed torque-taking member of the brake for applying friction elements to opposite sides of the disc. The caliper member is slidably mount |
| 4223957 |
Anti-lock brake control system I |
September 23, 1980 |
| An anti-lock brake control system for vehicles with braked wheels comprising a wheel speed sensor for producing a signal proportional to wheel speed; a first switch having an input connected to the sensor to receive the wheel speed signal and being adapted to respond to the rate of c |
| 4223954 |
Control valve assemblies for hydraulic braking systems |
September 23, 1980 |
| 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 |
| 4218882 |
Hydraulic power systems for vehicle braking and levelling systems |
August 26, 1980 |
| In an hydraulic power system for operating a vehicle levelling system and braking system, an accumulator supplies both the levelling system and the braking system. The accumulator is connected indirectly to the braking system through a pressure limiting device, which disconnects the brak |
