| Patent Number |
Title Of Patent |
Date Issued |
| 4214775 |
Suspension assemblies for vehicles |
July 29, 1980 |
| An hydro-pneumatic suspension assembly for vehicles comprises a pressure chamber in a combination with an hydraulic suspension unit of the self-levelling type. The unit incorporates a spool valve for maintaining the length of the unit at a predetermined value irrespective of the load. |
| 4210370 |
Anti-skid vehicle braking systems |
July 1, 1980 |
| In a fluid-pressure operated anti-skid braking system operation of a brake applying relay valve is controlled by application pressure in an application chamber. A memory chamber is connected to the application chamber through a one-way valve and a restrictor permits pressure in the m |
| 4210229 |
Disc brake assemblies |
July 1, 1980 |
| A disc brake assembly includes one or more rotatable friction discs which are slidably keyed to a second portion of a two part shaft assembly and the second portion surrounds and is rotatable relative to the first portion which transmits drive directly to a wheel and drives the second |
| 4209203 |
Anti-skid brake control system |
June 24, 1980 |
| An anti-skid brake control system has a brake pressure control unit for producing a release signal to trigger the release of brake pressure and a subsequent re-apply signal to trigger the re-application of brake pressure in successive brake pressure release/re-apply cycles; and a change- |
| 4205734 |
Hydraulic braking systems for vehicles |
June 3, 1980 |
| 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 inde |
| 4203630 |
Brake control units |
May 20, 1980 |
| A brake control unit for a vehicle hydraulic braking system is adapted for incorporation between the master cylinder and the rear wheel brakes, with the front wheel brakes being applied by pressure from the master cylinder. The control unit incorporates an outlet connected to the rear wh |
| 4200340 |
Control valve assemblies for hydraulic braking systems |
April 29, 1980 |
| In a control valve assembly for a vehicle dual hydraulic braking system separate brake-applying valves in a common body are operable independently or simultaneously to cause hydraulic fluid from a distributor chamber to be supplied to one or both of a pair of outlets for connection to br |
| 4199941 |
Hydraulic systems |
April 29, 1980 |
| In an hydraulic system an unloader valve is located in a line between a pump and an hydraulic accumulator. The unloader valve is operative to prevent the accumulator from being overcharged and to allow the pump to re-charge the accumulator should the pressure stored therein fall below a |
| 4199044 |
Disc assemblies for vehicle disc brakes |
April 22, 1980 |
| In a disc assembly for a vehicle disc brake, the assembly comprises a rotor, with brake rings secured to one or both of a pair of opposite faces of the rotor by bolts passing through clearance openings in the rotor. Each brake ring comprises at least two segments, with clearances provide |
| 4193643 |
Anti-skid vehicle braking systems |
March 18, 1980 |
| In a fluid-pressure operated anti-skid braking system operation of a control valve is controlled by a force of which the magnitude is determined by utilization of the pressure in a memory chamber defined between a pair of relatively movable spaced pistons. The piston carries a head w |
| 4189191 |
Control valve assemblies for hydraulic braking systems |
February 19, 1980 |
| A control valve assembly for a vehicle dual hydraulic braking system in which hydraulic fluid from a distributor chamber can be supplied to one or both of a pair of outlets for connection to brakes on opposite sides of a vehicle. The assembly incorporates a pressure control valve operabl |
| 4189032 |
Hydraulically-operated disc brakes for vehicles |
February 19, 1980 |
| In a disc brake of the slidable reaction type in which an hydraulic actuator is located in a stationary member, a clamp member is guided for movement relative to the stationary member in a direction substantially parallel to the axis of the disc by means of a pin which is connected to |
| 4185750 |
Reservoirs for master cylinders |
January 29, 1980 |
| A reservoir of synthetic plastics material for a master cylinder is constructed from a base and a lid which are permanently connected together at their mating faces, for example by welding, along a join line which lies in a single plane. A partition is upstanding from the base and a |
| 4184717 |
Control valve assemblies for hydraulic braking systems |
January 22, 1980 |
| A control valve assembly for vehicle dual hydraulic braking systems is operated by a lever mechanism. The lever mechanism comprises first and second levers which are pivotally connected to each other by a first pivot. One lever acts on a valve mechanism for controlling pressurization |
| 4184574 |
Internal shoe drum brakes |
January 22, 1980 |
| In an internal shoe-drum brake a thrust transmitting member is interposed between a shoe-end and an abutment for that shoe-end. The thrust transmitting member has a planar face engaging with the abutment and an arcuate face which is received in a complementary recess of arcuate outli |
| 4181372 |
Modulator for anti-skid vehicle braking systems |
January 1, 1980 |
| In a pressure modulator for an anti-skid braking system a spring acts through a modulator piston to bias a piston assembly into a position in which an inlet for connection to a pressure source is connected to an outlet for connection to a wheel brake. Normally the spring force is aug |
| 4177883 |
Discs for disc brakes |
December 11, 1979 |
| In a rotor for vehicle brakes, for example, discs for disc brakes and drums for shoe-drum brakes, the braking member is carried from one side of a driving component for connection to a wheel or shaft. The outer face of the member remote from the driving component comprises a braking surf |
| 4175795 |
Fluid-pressure operated anti-skid braking system for vehicles |
November 27, 1979 |
| In a fluid-pressure operated anti-skid braking system operation of a brake-applying relay valve is controlled by control pressure in an application chamber. A memory chamber is connected to the application chamber through a one-way valve and an orifice permits pressure in the memory |
| 4173866 |
Hydraulic systems |
November 13, 1979 |
| In an hydraulic system in which an hydraulic accumulator is charged with hydraulic fluid under pressure by means of an hydraulic pump which draws hydraulic fluid from a tank, and an unloader valve disposed in a supply line between the pump and the accumulator is operative to prevent the |
| 4170877 |
Reservoir assemblies for vehicle braking systems |
October 16, 1979 |
| In a reservoir assembly for a tandem master cylinder of a hydraulic braking system the container is separated into compartments by at least one baffle passages being provided for permitting limited communication between the compartments past the baffle. The arrangement is such that when |
| 4166431 |
Reservoirs for liquids |
September 4, 1979 |
| In a reservoir comprising a container for liquid at least one portion of the top wall of the container is depressed to form a window, the depressed portion and at least a part of the surrounding area being transparent or translucent so that the reservoir can be filled with a liquid until |
| 4162443 |
Speed measuring systems |
July 24, 1979 |
| The frequency of a pulse signal is measured by counting the number of complete pulse cycles and measuring the fractional value of any incomplete pulse cycle occuring during a fixed sampling period, and summing said number of complete pulse cycles and said fractional value of any inco |
| 4155603 |
Anti-skid vehicle braking systems |
May 22, 1979 |
| In a fluid pressure-operated anti-skid braking system for vehicles, operating fluid from a supply is supplied to the wheel brake through a fluid-flow control valve interposed between the supply and the brake. A deceleration responsive device responsive to a skid signal is incorporated |
| 4151899 |
Mounting assembly for a disc brake caliper arrangement |
May 1, 1979 |
| 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 |
| 4146276 |
Anti-skid system |
March 27, 1979 |
| An anti-skid brake control system which is adapted to control the brake of a wheel comprising a brake release switch that produces a control signal to release the brake on detection of the onset of skidding of the wheel, a sensor for producing an electrical signal proportional to the ang |
| 4139082 |
Disc brake structure permitting quick change of friction pads |
February 13, 1979 |
| In a spot-type disc brake the pads are insertable in a substantially peripheral direction through openings in an end of the brake. In service the openings are blocked by a closure member which has to block the two openings two limbs each extending through the openings to engage the pads. |
| 4134477 |
Sliding caliper disc brakes |
January 16, 1979 |
| A sliding caliper disc brake comprising a torque member which is adapted to be fixedly mounted adjacent a brake disc and which has portions lying on both sides of the brake disc which are connected by bridging portions positioned radially outwardly of the periphery of the disc. Directly |
| 4131325 |
Electrically controlled fluid brake system |
December 26, 1978 |
| A vehicle braking system employs a fluid pressure operated device for engaging the brakes. Flow of liquid under pressure to this device is controlled by a solenoid inlet valve and escape of fluid is controlled by a solenoid outlet valve both of which are normally closed. A demand signal |
| 4122920 |
Disc brakes for vehicles |
October 31, 1978 |
| In a disc brake including pad assemblies for engagement with opposite faces of a rotatable disc and a clamp assembly extending over the peripheral edge of the disc, the clamp assembly comprises pressure plates interconnected by spaced parallel limbs passing through superimposed openi |
| 4121845 |
Boot for slidably guided member |
October 24, 1978 |
| In a boot assembly for forming a dust seal between an axially movable guided member, such as a piston, and a guide member, such as a vehicle brake actuator housing, a seal which seals with the guide member is carried by a rigid carrier member and one part of the seal is movable relat |
| 4121704 |
Valve assembly for a piston of a telescopic damper |
October 24, 1978 |
| In a valve assembly for a telescopic damper, comprising a piston with flow channels controlled by valve members located on opposite sides of the piston, axially directed, annular valve seats which cooperate with the valve members are provided on separately formed seat members positioned |
| 4121703 |
Automatic slack adjusters for vehicle brake linkages |
October 24, 1978 |
| An automatic slack adjuster for a vehicle brake linkage comprising a housing constituting a lever in the linkage, and the lever is angularly movable about the axis of a shaft to impart to the shaft a brake-applying rotary movement which it transmits to it through a meshing worm and worm |
| 4121700 |
Disc brakes for vehicles |
October 24, 1978 |
| In a disc brake of the kind in which the clamping member straddling the disc consists of pressure plates located on opposite sides of the disc and interconnected at their outermost ends by draw-bars, each draw-bar is provided at one end with a threaded portion and the threaded portions a |
| 4121698 |
Sliding caliper disc brake |
October 24, 1978 |
| A sliding caliper disc brake comprises a torque member, a caliper member slidably mounted on the torque member for straddling a minor portion of the periphery of a rotatable disc, and an actuator for directly urging a friction pad against one side of the disc to cause the caliper member |
| 4121696 |
Disc brakes for vehicles |
October 24, 1978 |
| A disc brake assembly for a vehicle comprises a first inboard and a second outboard rotatable disc which are both relatively fixed and spaced axially. Superimposed friction pads for engagement with opposite faces of the discs are guided in a common drag-taking member which takes the drag |
| 4114733 |
Automatic slack adjusters for vehicle brake linkages |
September 19, 1978 |
| An automatic slack adjuster for a vehicle brake linkage comprising a housing constituting a lever in the linkage, and the lever is angularly movable about the axis of a shaft to impart to the shaft a brake-applying rotary movement which it transmits to it through a meshing worm and worm |
| 4114145 |
Dual hydraulic braking system for vehicles |
September 12, 1978 |
| In a pressure differential warning actuator for detecting when a differential between the pressure of separate brake circuits of an hydraulic braking system exceeds a predetermined value, at least two separate pistons work in separate bore portions in a common housing and are movable |
| 4113317 |
Brake pressure reducing control valve |
September 12, 1978 |
| A pressure reducing valve for a vehicle braking system, comprises an inlet and an outlet communicating with each other through a radial port, and an elastomeric seal movable relative to the port between a closed position in which the seal covers the port and an open position. The seal is |
| 4113068 |
Hydraulically operated disc brakes |
September 12, 1978 |
| An hydraulically operated disc brake includes a yoke slidably mounted on a stationary member for movement in a direction parallel to the disc and two pistons for actuating the brakes. The first piston acts directly on a friction pad and the second piston acts directly on the yoke and |
| 4112682 |
Master cylinder assemblies |
September 12, 1978 |
| A booster operated master cylinder piston for use in an anti-skid braking system includes a modulator piston located between the master cylinder piston and the booster valve assembly. In the event of a skid the pressure of booster fluid acting on the modulator piston is equalized across |
| 4111285 |
Slidable caliper and pivotal mounting means therefor |
September 5, 1978 |
| A disc brake having a caliper mounted for sliding on a torque plate has a facility for forming a temporary pivotal connection between the caliper and torque plate so that the caliper may be supported by the torque plate when the sliding connection is released for servicing. The pivotal |
| 4108284 |
Railway brake assemblies including knock-back compensating means |
August 22, 1978 |
| A brake comprises a rotor which is permitted to float axially and a friction pad which is carried by a support. The support is movable towards and away from a braking surface of the rotor and is urged to a datum position under the action of a return force. A spring or other resilient |
| 4106821 |
Failure detection circuit for a vehicle anti-skid braking system |
August 15, 1978 |
| An anti-skid braking system including a plurality of independent solenoid energizing circuits which are controlled in accordance with the outputs of sensors on separate wheels of a vehicle, has a failure detection circuit comprising a timer triggered into operation each time any one of t |
| 4094389 |
Disc brakes |
June 13, 1978 |
| A disc brake caliper consists of a body member including a cylinder portion, and a bridge member attached to the body member by two bolts. The body and bridge members of the caliper abut one another at two pairs of parting faces lying in a common plane, aligned bolt holes for the two |
| 4093044 |
Sliding caliper disc brake |
June 6, 1978 |
| A sliding caliper disc brake comprises a caliper member adapted to straddle a minor portion of the periphery of a rotatable disc, a carrier member for fixing to a vehicle, guide means guiding the caliper member for sliding relative to the carrier member, and an actuator for directly urgi |
| 4090740 |
Load sensitive brake control valve assemblies |
May 23, 1978 |
| A control valve assembly for a vehicle braking system comprises a control valve having a control valve operating member operable to control communication between an inlet and an outlet, a pivoted lever arrangement subjected to an input force applied by a spring and applying an output |
| 4090533 |
Fluid valve assemblies |
May 23, 1978 |
| 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 variable throttling of flow through the |
| 4089392 |
Self-energizing disc brakes and actuator therefor |
May 16, 1978 |
| In a disc brake in which the brake applying mechanism is actuated by movement of a first pull rod, the hydraulic actuator which effects movement of the pull rod comprises an assembly of piston and cylinder members of which one is rigidly fixed with respect to a housing and the other |
| 4087663 |
Liquid level contents indicators for vehicle hydraulic systems |
May 2, 1978 |
| In a liquid level contents indicator for a vehicle hydraulic system of the float-operated electric switch type manually operable mechanism for testing the circuit comprises a push-button located in an end closure cap for a reservoir and the push-button acts on contacts of the electric |
| 4085830 |
Automatic slack adjusters for vehicle brakes |
April 25, 1978 |
| In an automatic slack adjuster for a vehicle brake, an adjuster member acts on a part of an adjustable strut assembly for maintaining a substantially constant braking clearance between a braking member and a rotatable braking surface, the adjuster member acting on the part through a driv |
