| Patent Number |
Title Of Patent |
Date Issued |
| 4004658 |
Sliding caliper retaining mechanism for a disc brake |
January 25, 1977 |
| In a disc brake of slidable-caliper reaction type of the caliper is located in a gap between spaced arms in a stationary member, and a resilient blade spring acts between one end of the caliper and one of the arms. The blade spring is interposed between the caliper and a key engaging wit |
| 4004657 |
Self-energizing disc brakes |
January 25, 1977 |
| In a spreading disc brake relative angular movement of the pressure plates to initiate the application of the brake is effected by a fluid pressure actuator acting on a pull-rod through a pivotal thrust coupling so arranged as to confine rocking movement of the pull-rod to a single plane |
| 4004425 |
Tandem master cylinders for hydraulic braking systems |
January 25, 1977 |
| In a tandem master cylinder main and secondary pistons are interconnected by a rigid sleeve. One end of the sleeve is secured to one of the pistons, and an inwardly projecting lip or flange on the other end of the sleeve provides an abutment for a head on an axial stem extending from the |
| 4003453 |
Sliding caliper disc brake |
January 18, 1977 |
| A vehicle disc brake of the sliding caliper reaction type including a caliper slidably mounted on a carrier wherein the carrier incorporates spaced arms extending axially in a direction away from the plane of the disc and providing spaced parallel guides with which complementary axially |
| 3999638 |
Brake slack adjusters |
December 28, 1976 |
| An automatic slack adjuster for a vehicle brake is disposed between a piston and another component, such as a counter piston, of a hydraulic actuator. The adjuster mechanism is housed in an encapsulating container which is positively attached to the piston. A strut, on which an auxiliary |
| 3995913 |
Actuator assemblies for vehicle hydraulic braking systems |
December 7, 1976 |
| In a pneumatically-operable actuator assembly for a vehicle hydraulic braking system a control valve assembly comprises a first valve responsive to a signal of deceleration for controlling communication between an inlet passage for connection to a supply of air under pressure and a modul |
| 3994538 |
Hydraulic control valve assemblies for vehicle anti-skid braking systems |
November 30, 1976 |
| An hydraulic control valve assembly for a vehicle anti-skid braking system incorporates a modulating piston for modulating the supply of hydraulic fluid between communicating ports in a housing, and a compression spring normally urges the modulator piston into an inoperative position. Th |
| 3994537 |
Actuator assemblies for hydraulic vehicle braking system |
November 30, 1976 |
| In a vehicle hydraulic braking system the supply of fluid from an hydraulic master cylinder to the slave cylinder of a wheel brake is controlled by an actuator assembly which includes a modulator assembly for controlling the supply to the slave cylinder in accordance with the deceleratio |
| 3994535 |
Master cylinder assemblies |
November 30, 1976 |
| 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 |
| 3994534 |
Anti-skid braking systems for vehicles with wheel driven pumps |
November 30, 1976 |
| In an hydraulically-operated braking system for vehicles a supply of hydraulic fluid under pressure from a pump is utilized for applying a wheel brake, and the pump is responsive to rotation of the braked wheel so that the brake applying force is dependent upon the speed of rotation of |
| 3994371 |
Vehicle brake actuators |
November 30, 1976 |
| In a wedge actuator the inner end face of one tappet which co-operates with the wedge member is made normal to the axis of movement of that tappet, and the line of action of the wedge member is inclined to the plane of that end face. |
| 3991573 |
Master cylinder assemblies for vehicle hydraulic braking systems |
November 16, 1976 |
| A master cylinder assembly for a vehicle hydraulic braking system comprises a pedal-operated valve assembly for controlling a supply of fluid under pressure to a power chamber in a housing on the opposite side of a piston to a pressure space which has an outlet for connection to a wheel |
| 3989312 |
Control valve assemblies for use in fluid pressure braking systems |
November 2, 1976 |
| A fluid pressure operated vehicle braking system includes a control valve assembly comprising an inlet and outlet, a normally-open valve having a valve member movable in response to a predetermined inlet pressure to control the flow of pressure fluid between the inlet and the outlet, and |
| 3983975 |
Lock assembly for a vehicle disc brake |
October 5, 1976 |
| A disc or drum brake fluid pressure actuator incorporates a lock actuator strut acting on an inner part of a telescopic piston assembly, of which the inner and outer parts are normally rendered effectively unitary by pre-stressed spring which can, however, deflect under excess pressure t |
| 3982611 |
Disc brake torque regulating structure |
September 28, 1976 |
| A disc brake includes a friction element which has a portion of increased axial thickness defining an initial friction surface, the center of pressure of this surface being radially offset from the center of pressure of the whole friction surface of the element so that a relatively large |
| 3980348 |
Fluid flow control valves |
September 14, 1976 |
| A diaphragm valve has a relatively long seating formed by a plurality of ribs which engage with one air operated diaphragm. An annular valve is provided by slotting the outer surface of an annular seating member which engages an endless diaphragm, alternate slots communicating with the i |
| 3980004 |
Piston and seal assemblies |
September 14, 1976 |
| A piston and seal assembly is adapted to work in a cylinder, particularly a master cylinder of a vehicle braking system, the seal having a lip which sealingly engages the cylinder bore on the pressure stroke, an inner portion mounted on the piston, and an interconnecting portion between |
| 3979153 |
Master cylinder assemblies for vehicle hydraulic braking systems |
September 7, 1976 |
| 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 relieved. |
| 3977500 |
Shoe drum brakes for vehicles |
August 31, 1976 |
| An internal shoe-drum brake in which arcuate shoes carrying friction linings for engagement with a rotatable drum are mounted on a stationary back-plate and the shoes are separated at one end to bring them into engagement with the drum by a service actuator for normal service braking |
| 3976334 |
Vehicle brake pressure control valves for use in dual pressure systems |
August 24, 1976 |
| A pressure control valve for a braking system having separate pressure circuits comprises a control member movable to control communication between an inlet and an outlet for connection in one of the circuits and spring biased to a valve open position. The control member has an exten |
| 3973578 |
Tandem control valve |
August 10, 1976 |
| A pressure control valve for a braking system having two separate pressure circuits comprises two valves for connection in the respective circuits. Each valve has a valve closure member, the members being axially aligned and coupled together for movement in unison for simultaneous openin |
| 3973473 |
Shoe-drum brakes for vehicles |
August 10, 1976 |
| In an hydraulic actuating assembly for a vehicle shoe-drum brake comprising first and second relatively slidable members, the first member is provided with a longitudinally extending bore which is closed at one end and in which works a portion of the second member, and a sealed hydraulic |
| 3973401 |
Power-operated boosters for vehicle braking systems |
August 10, 1976 |
| In a power-operated hydraulic booster for a vehicle braking system pressurization of a power chamber in a housing on one side of a boost piston is controlled by an assembly of at least two separate spool parts which work in bores in the boost piston and the housing, and a boost chamb |
| 3972190 |
Vehicle brake pedal arrangements |
August 3, 1976 |
| A brake actuating assembly for actuating a master cylinder having a power assistor comprises a brake pedal pivotable about a pivot point at one end and connected at a point intermediate its ends to an actuating member of the master cylinder, movement of the actuator member also actuating |
| 3966025 |
Hydraulically operated disc brakes for vehicles |
June 29, 1976 |
| A disc brake comprises a fluid pressure-operated actuator for urging two pressure plates carrying friction pads to opposite faces of a disc. In the actuator a piston movable in a housing is detachably engaged with a draw-bar which acts on one of the pressure plates, the housing acting |
| 3964806 |
Thrust devices |
June 22, 1976 |
| A thrust device of the kind in which an axial thrust is produced by relative angular movement between two substantially parallel thrust plates between which balls or rollers co-operate with inclined ramp surfaces, for use in a spreading type disc brake for example. Deformable means are |
| 3964581 |
Disc brake assembly having a releasable drag-taking member |
June 22, 1976 |
| A drag-taking member for a disc brake of the sliding caliper reaction type comprises a pair of circumferentially spaced arms which form drag-taking guide means for a directly actuated friction pad assembly. The radially innermost ends of the arms are separate from each other, and the arm |
| 3964579 |
Railway brakes |
June 22, 1976 |
| A vehicle brake comprises a plurality of elongated friction members for engagement with the brake rotor, the friction members being laterally supported close to their rotor-engaging ends, and an actuating mechanism having an elongated thrust-transmitting member substantially co-extensive |
| 3963225 |
Telescopic gas springs |
June 15, 1976 |
| A telescopic gas spring comprises a cylinder closed at one end, a piston slidable in the cylinder and a piston rod carrying the piston and extending sealingly through the other end of the cylinder. An auxiliary spring is disposed at the closed end of the cylinder and comes into opera |
| 3963100 |
Internal shoe drum |
June 15, 1976 |
| The invention is an improved adjuster for a shoe drum brake of the type having an operating arm for mechanical operation pivoted to one of the shoes, a strut of adjustable length extending between the shoes and including a ratchet, and a pawl lever having a first arm carrying a pawl |
| 3957074 |
Control valve assemblies for vehicle hydraulic braking systems |
May 18, 1976 |
| In a control valve assembly of the kind set forth for vehicle braking systems a valve-operating member for operating first and second valves is guided to slide in a bore in a piston. The valve-operating member is adapted to permit the second valve to close and the first valve subsequ |
| 3954306 |
Load responsive brake pressure control valves |
May 4, 1976 |
| A brake pressure limiting or reducing valve has its cut-off or operating pressure determined in accordance with vehicle loading through the agency of a simple tension spring connected directly between a movable member of the valve and a portion of the vehicle which is subject to vertical |
| 3954305 |
Actuator assemblies for vehicle brakes |
May 4, 1976 |
| An actuator assembly for a vehicle brake includes three axially aligned pistons, a first actuating piston for applying the brake hydraulically during normal service braking; a modulator piston movable for anti-skid purposes between a first position in which an inlet valve controlling the |
| 3954159 |
Brake slack adjusters |
May 4, 1976 |
| An automatic slack adjuster for a vehicle brake is disposed between a piston and another component, such as a counter piston, of a hydraulic actuator. The adjuster mechanism is housed in an encapsulating container which is positively attached to the piston. A strut, on which an auxiliary |
| 3952845 |
Brake adjusters |
April 27, 1976 |
| A slack adjuster for a vehicle braking system includes first and second members having a normally reversible screw-thread connection therebetween. The first and second members are disposed between first and second pistons respectively of the braking system and excessive displacement of t |
| 3952844 |
Helical cam actuator for a disc brake |
April 27, 1976 |
| A reaction type disc brake is provided with a mechanical actuator in the form of a helical thrust bearing whose nonrotatable cam component is part of or fixed relatively to the caliper. The rotatable cam component is housed in the caliper and is axially displaceable as well as rotatable |
| 3952843 |
Spreading disc brake and cam actuator therefor |
April 27, 1976 |
| In a spreading disc brake recesses for co-operation with balls located between pressure plates comprise straight grooves of progressively varying depth in inserts mounted in the pressure plates for angular movement about axes normal to the planes of the plates. |
| 3951239 |
Plural disc brake systems |
April 20, 1976 |
| In a disc brake assembly of the type including first and second fluid pressure-operated actuators for applying friction pads to opposite faces of first and second axially spaced rotatable discs respectively, the first and second actuators are both disposed on the same one side of a disc |
| 3949845 |
Thrust transmitting assemblies |
April 13, 1976 |
| A thrust transmitting assembly, particularly useful as a shoe tip abutment for an internal shoe drum brake, has a cylindrical output member and a slidable input member in the form of a piston, the members being transmissively coupled by a fluent material, such as an elastomeric mater |
| 3946192 |
Method of manufacturing a friction disc |
March 23, 1976 |
| A method of manufacturing a friction disc for use, inter alia, in a disc brake, the friction disc including a metal backing plate and a plurality of friction pads carried by the backing plate. The method comprises the steps of providing a plurality of powder compacts of friction material |
| 3945688 |
Brake pressure control valves |
March 23, 1976 |
| A vehicle brake pressure control valve whose operating or cut-off point is determined by an external load applied to a movable member of the valve, is provided with means to ensure free fluid flow through the valve in the event of the external load diminishing or disappearing completely. |
| 3945261 |
Abutment assembly for shoe drum brakes |
March 23, 1976 |
| An abutment assembly for an internal shoe drum brake, particularly a vehicle wheel brake, comprising a pair of opposed abutment members for engagement with respective ends of the brake shoes and an arrangement for transmitting only part of the input force applied to one abutment member, |
| 3943829 |
Vehicle wheel brake actuators |
March 16, 1976 |
| A vehicle wheel spring brake actuator has a service braking piston and cylinder assembly and an auxiliary parking or emergency braking piston and cylinder assembly, the emergency braking piston being spring biassed towards a brake-applying position and normally held off by an opposing |
| 3941427 |
Anti-skid braking system for vehicles |
March 2, 1976 |
| An anti-skid braking system for vehicles includes a connection between a master cylinder and each wheel brake by-passing a modulator for modulating the braking pressure in the event of a skid. Each by-pass connection is controlled by a valve and all the by-pass valves are normally mainta |
| 3941222 |
Vehicle shoe drum brakes |
March 2, 1976 |
| The invention concerns shoe drum brakes and provides for such brakes, a replaceable shoe lining component which is detachably secured to the shoe platform or backplate, the latter remaining permanently in position in the brake assembly. The lining component preferably comprises a thin ca |
| 3941220 |
Railway brakes |
March 2, 1976 |
| A vehicle brake having a plurality of elongated, laterally supported friction members for engagement with the brake wheel. An adjustable actuating mechanism engages the members and includes a screw surrounded by a guide tube of friction material which engages the wheel. |
| 3941217 |
Vehicle brake adjuster |
March 2, 1976 |
| A vehicle wheel internal shoe drum brake has a pair of opposed brake shoes, an actuator acting between one pair of adjacent ends of the shoes and a two-part adjustable strut for adjusting the positions of the shoes relative to each other to compensate for wear. The strut has an elongate |
| 3941155 |
Hydraulic control valve assemblies |
March 2, 1976 |
| In a control valve assembly operation of inlet and exhaust valves is controlled by a valve-operating assembly which is common to both valves and which is responsive to movement of a piston, and a reversing mechanism incorporated in the valve-operating assembly is constructed and arranged |
| 3939945 |
Closed-loop type disc brake |
February 24, 1976 |
| In an hydraulically-operated disc brake of the single sided reaction type for a vehicle, an hydraulic actuator includes first and second pistons for applying friction pad assemblies to opposite faces of a rotatable disc, one piston acting directly on one friction pad assembly and the oth |
| 3939727 |
Mechanical actuating system |
February 24, 1976 |
| In a mechanical actuator system a primary lever is angularly movable about a first pivot on a secondary lever through a first range to apply a force to an actuated member, and the actuating force is then transmitted to the actuated member through a higher leverage by the secondary lever |
