586results about "Fluid actuated brakes" patented technology

A disc brake assembly includes a rotor, a caliper, brake pads and an optional filter. The optional filter can be disposed within a shroud which covers at least about 70% of the distal side periphery on at least one of the two sides of the rotor. The disc brake also includes an impeller or other means for providing air flow to the disc brake assembly. The impeller can be provided by the rotor itself or it can be provided by a separate component which is powered either directly or indirectly by the rotor.

A fluid pressure operated friction coupling comprising a multiple friction disc assembly having a single piston actuator and having first and second springs operatively configured and arranged in response to pressurization of the piston actuator to selectively engage first and second sets plates and friction components for varying the gain of the coupling.

An apparatus for stabilizing a shaft in an essentially horizontal position while an anchoring object at one end of the shaft is replaced without removal of an object at the opposite end of the shaft that would otherwise tend to destabilize the shaft from its essentially horizontal position includes a half-spool member configured to clamp above and around the shaft to resist torque around the rotor, under supports configured to attach to the half-spool member and clamp an underside of the shaft below the half-spool member, and a hydraulic or mechanical brake configured to resist torque on the shaft when the brake is engaged.

An object is to make it possible to stably transmit torque of the rotary shaft to the respective planetary rollers without applying a preload to the planetary rollers with a negative gap between the radially outer surface of the rotary shaft and the radially inner surface of the outer ring member.

Planetary rollers 7 rotatably supported on their radially inner surfaces by respective support pins 6b are radially inwardly biased by radially compressible ring springs 18 enveloping the support pins 6b, thereby biasing and pressing the respective planetary rollers 7 against the radially outer surface of a rotary shaft 4. Thus, it is possible to stably transmit torque of the rotary shaft 4 to the respective planetary rollers 7 without applying a preload to the planetary rollers 7 with a negative gap between the radially outer surface of the rotary shaft 4 and the radially inner surface of the outer ring member 5.

A multi-wheel-driving vehicle including at least three parallel axles each of which is provided on both ends thereof with respective drive wheels and including power dividing means for permitting the rotary speed among the axles, is improved in its effect of braking so that the braking force of fewer brakes is effectively transmitted to all drive wheels of a vehicle according to a simple braking operation by a driver. The power dividing means, for example, a differential gear unit, includes an input member and a pair of output members, like differential side gears, each of which interlocks with at least one of the axles so as to differentially share a driving force received by the input member between the pair of output members. The multi-wheel-driving vehicle comprises a brake provided on one of the at least three axles, and locking means for locking the input member and the pair of output members together, so that when a driver operates a brake-operating tool for braking, the locking means is automatically operated to lock the input member and the pair of output members together.

A bicycle disc brake assembly is provided with a double disc brake rotor with a pair of floating discs and a bicycle disc brake caliper with four friction members. The center or intermediate friction members are floating friction pads. The bicycle disc brake caliper also has a caliper housing with a single piston unit. The housing has a frame mounting member sized to be coupled to a portion of a bicycle frame. The piston unit is movably coupled to the housing between a release position, in which the piston unit is spaced from a disc brake mounted to a wheel of a bicycle, and a braking position, in which the piston unit engages the disc brake of the bicycle wheel. The double disc brake rotor has a support member with first and second disc brake members movably coupled thereto. More specifically, the support member has an outer attachment portion and an inner attachment portion. The inner attachment portion is configured to be coupled to rotate with a hub about a center rotational axis. The first disc member is movably coupled to the outer attachment portions for a first amount of axial movement relative to the support member. The second disc member is movably coupled to the outer attachment portion for a second amount of axial movement relative to the support member. The second amount of axial movement is different from the first amount of axial movement. Preferably, the first amount of axial movement is preferably at least twice the second amount of axial movement.

A brake disc for cycle brake systems includes an outer peripheral portion, a hub portion, and an air circulating device attached to the brake disc, and inclined relative to the brake disc, to propel and circulate air around the brake disc when the brake disc is rotated. For example, the air circulating device includes a number of spokes or fan blades secured between the outer peripheral portion and the hub portion of the brake disc, and inclined relative to the brake disc. The fan blades may be secured to the spokes.

The present invention relates to a hydraulic vehicle brake equipped with a parking brake device, in particular for motor vehicles, including a brake housing in which a hydraulic service pressure chamber is delimited by a brake piston, wherein the parking brake device acts on the brake piston and, in the applied condition, can be locked by means of a locking device, and an energy accumulator cooperating with the brake piston is equipped with at least one integrated spring element. In order to realize a simple and low-cost parking brake function that complies with legal requirements, according to the invention, the parking brake device is operable by a pressure that is introduced into the service pressure chamber and enables charging the energy accumulator.

In various exemplary embodiments, the technology described herein provides a modular hydraulic brake caliper for use on automobile vehicles and motorcycles. A modular hydraulic disc brake caliper housing to house a piston block assembly includes one or more top bridge configured to stiffen and strengthen a disc brake caliper. The housing includes one or more caliper body configured to stiffen and strengthen a modular hydraulic brake caliper assembly, to securely receive the top bridge and to restrain a piston block assembly, and is configured with or without the use of an integral piston. The housing can include at least one side bridge configured to stiffen and strengthen the modular hydraulic brake caliper assembly. The housing can include at least one end bridge configured to secure one side bridge to another and to the top bridge. A modular hydraulic disc brake caliper assembly, a disc brake assembly, and associated methods are disclosed.

A brake pad assembly provided for a disc brake apparatus. The brake pad assembly comprises a backing plate having a flat inner face and a flat outer face oriented opposite to the inner face, a friction member fixed to the inner face of the backing plate, and an anti-squeal shim attached to the outer face of the backing plate. The anti-squeal shim includes a flat support plate attached to the outer face of the backing plate and a straight flat flange plate. The support plate of the anti-squeal shim has a peripheral edge including opposite outer and inner edges and opposite side edges. The flange plate is in the form of a flexible cantilever formed integrally with the support plate of the anti-squeal shim and extends away from one of the outer, inner and opposite side edges of the support plate of the anti-squeal shim.

A disc brake includes a piston seal made of rubber that is shaped to fit into a seal groove on the inner surface of a cylinder of a caliper for a brake piston. To prevent braking effectiveness from being impaired, even if the temperature of a caliper rises in a disc brake for a vehicle, the piston seal and/or the seal groove is shaped to control and contain the effects of thermal expansion due to the heat of the disc brake. The clearance between the piston seal and the seal groove is removed and clearance is provided between parts of the periphery of the piston seal and the seal groove.

A boot-type seal having a seal and a valve. The seal has a first seal member, which is configured to sealingly engage a first surface, and a second seal member, which is configured to sealingly engage a second surface. The valve is coupled to the seal and is operable in a first condition, which inhibits fluid communication therethrough, and a second condition, which permits fluid communication therethrough. The condition of the valve changes from the first condition to the second condition in response to a fluid pressure exerted on a side of the seal that exceeds a predetermined threshold pressure. A brake assembly that incorporates the boot-type seal is also provided.

An object of the present invention is to provide a highly reliable disk brake. In a disk brake 1 according to the present invention, a connector portion 35 is provided at a housing 30. The connector portion 35 includes supply terminals 131 for supplying power to a motor 32. The supply terminals 131 of the connector portion 35 and motor terminals 32C of the motor 32 are connected to each other via bus bars 130 made of metallic plate. Further, the bus bars 130 are held in a loosely fitted state on another-side surface 138B of a plate-like portion 138 of a support member 135 attached to the housing 30.

An inlet, positioned to access the flow of air passing around and under a moving vehicle, may draw in air which is conveyed through a duct and discharged to cool a brake on a vehicle. The inlet has a closure. The closure is opened and closed on demand by a temperature-operated actuator incorporating an active or smart material under the direction of a controller. In embodiments, a sensor, suitably positioned to sense a temperature representative of the brake temperature, communicates the sensed brake temperature to the controller. The controller may respond to the sensed brake temperature, by triggering operation of the actuator. Typically the closure is opened to allow passage of cooling air to the brake when the sensed brake temperature exceeds, or is anticipated to exceed, a predetermined temperature.

A disc brake assembly is provided with heat insulators to reduce the heat transferred to the hydraulic fluid of the disc brake assembly during braking. The disc brake assembly includes a caliper housing, a first and a second friction member coupled to the caliper housing and one or more pistons movably coupled to the caliper housing to move one or both of the friction members. The first and second friction members form a rotor receiving slot. At least the first friction member is movably coupled to the caliper housing and the piston is movably coupled to the caliper housing to move the first friction member between a release position and a braking position. Each piston has an internal recess to partially receive the heat insulator. The heat insulator is disposed between the piston and the first friction member to prevent heat transfer from the first friction member to the piston. The heat insulator has a first end with a first end surface received in the recess of the piston, a second end with a second end surface spaced from the first end surface and a side wall extending between the first and second end surfaces. The second end is partially received in the recess of the piston and the side wall has a protrusion extending from the side wall to space the heat insulator from the piston. Alternatively, a heat insulator is provided that has a first end with a first end surface received in the recess of the piston, a second end with a second end surface spaced from the first end surface and a side wall extending between the first and second end surfaces. The second end is partially received in the recess of the piston and has a groove formed in the second end surface.

A plurality of rotating side brake disks and a plurality of non-rotating side brake disks are arranged outside in the radial direction from a motor shaft in a brake case while alternately overlapping with each other. A frictional material is provided on the non-rotating side brake disk, and an oil groove is provided in a frictional engaging surface of this frictional material. It is configured such that, when a braking force is applied by a brake piston to the motor shaft, lubricant oil flowing into the brake case from a lubricant oil inlet port flows from the outer diameter side to the inner diameter side between the rotating side brake disk and the non-rotating side brake disk only through the oil groove. As a result, the lubricant oil having flowed into the brake case efficiently cools the frictional engaging surface.

A heat shield assembly for a wheel and brake assembly (10) wherein the heat shield (40) is securable to the wheel and brake assembly (10) by one or more slots formed in a torque bar (24). The slots (44) secure the heat shield (40) against radial and circumferential movement. The heat shield (40) can be axially inserted and removed from the wheel and brake assembly (10) without removal of the torque bars (24).

The invention discloses a forklift travelling and parking integrated wet-type brake driving axle which comprises a main reducer assembly, an axle housing assembly, a left brake assembly, a right brake assembly, a left half axle, a right half axle, spline sleeves and fixing gear rings. A group of friction plates are arranged on each spline sleeve; a group of diaphragms are arranged in a groove of an inner hole of the left axle housing and a group of diaphragms are arranged in a groove of an inner hole of the right axle housing in the axle housing assembly; the friction plates and the diaphragms are alternately mounted; the left brake assembly and the right brake assembly are each provided with a parking brake mechanism and a travelling brake mechanism; hydraulic oil is guided into the left axle housing, and thus travelling brake and parking brake is completed in the parking brake mechanism and the travelling brake mechanism correspondingly under the action of the hydraulic oil. The friction plates are separated from the diaphragms through centrifugal force and inertia force after a vehicle moves. The influence on the parking brake from external factors like mud, water and oil is avoided, and the maintenance is convenient since the friction plates and the diaphragms can be maintained and replaced without disassembling an axle assembly.