Abstract: The present disk brake includes a braking force holding mechanism configured to restrict a rotation of a rotational shaft (a ratchet gear) to hold a braking force based on driving of a solenoid actuator. The braking force holding mechanism includes a holding member configured to move based on the driving of the solenoid actuator to restrict the rotation of the ratchet gear, and an engagement member coupled with this holding member. The engagement member is rotatably supported on a gear housing portion, and is configured to prohibit a movement of the holding member. Due to this configuration, an excitation force applied from outside to the holding member can be canceled out with the aid of the engagement member, and thus the disk brake can realize a size reduction and achieve cost saving.

Abstract: A lubrication mechanism is provided for a transmission unit having a balance piston. The lubrication mechanism is movable between a closed position when a clutch assembly is disengaged which prevents cooling flow of lubrication to a clutch pack of the clutch assembly, and an open position when the clutch assembly is engaged which provides for a cooling flow of lubrication to the clutch pack. In both positions, lubrication is supplied to a balance piston cavity between the clutch assembly and the balance piston.

Abstract: The present disclosure describes a brake system for a track section of a linear motor system. The brake system includes a housing receiving a brake flag of a mover and a first brake pad disposed within the housing and having a first tapered surface. The brake system also includes a second brake pad disposed within the housing and having a second tapered surface and a wedge disposed within the housing and comprising a third tapered surface. The brake system also includes an actuator that moves the wedge, wherein movement of the activation wedge causes the first brake pad to move and causes the second brake pad to move.

Abstract: A method of servicing a brake system, comprising: (a) moving an actuator of the brake system from a first position to a second position; (b) conducting a manual operation on the brake system when or after the actuator reaches the second position; and (c) after completing the manual operation, moving the actuator to a third position.

Abstract: A normally closed automotive clutch with hydraulic drive and having: a stack of driven and driving plates, which are mounted so as to rotate around a rotation axis; a pressure ring, which is mechanically coupled to the stack of plates and can axially slide so as to axially compress the stack of plates; at least one elastic closing element, which presses the pressure ring; a hydraulic actuator comprising an inner actuation chamber, which is suited to be filled with a fluid under pressure so as to generate an opening thrust, and a sliding piston, which is coupled to the inner actuation chamber and is mechanically connected to the pressure ring; and a box, which is provided with a lateral lid and houses the stack of plates, the pressure ring, the elastic closing element, and the hydraulic actuator.

Abstract: The invention proposes a friction coupling, in particular for use in motor vehicles, e.g. for controlling an air compressor, in which coupling at least two friction surfaces can be brought into frictional connection. According to the invention, two conical friction surface pairs are provided.

Abstract: A clutch control system of a clutch apparatus for a vehicle, includes a regulator valve switchable between a first mode in which a fluid pressure of a hydraulic fluid to a pressurized chamber is regulated to a first predetermined fluid pressure and a second mode in which the fluid pressure to a canceller chamber is regulated to a second predetermined fluid pressure, the regulator valve discharging a portion of the hydraulic fluid as a drain lubricant to the clutch portion, a switching valve switchable between a supply mode in which the hydraulic fluid is supplied to the pressurized chamber and a discharge mode in which the pressurized chamber is connected to a reservoir, and a control valve controlling the regulator valve to be switched between the first mode and the second mode and controlling the switching valve to be switched between the supply mode and the discharge mode.

Abstract: A multi-disc frictional engagement mechanism includes a plurality of driven plates and drive plates, a hydraulic piston, a spring which comes into contact with a pressure receiving portion of the hydraulic piston, an oil chamber which causes a hydraulic pressure to act on the pressure receiving portion, and a lock mechanism which restricts a movement of the hydraulic piston in a coupling direction toward the driven plates and the drive plates in a state where the hydraulic pressure is supplied to the oil chamber, the spring is compressed by the pressure receiving portion and the driven plates and the drive plates are not coupled.

Abstract: Some embodiments of a clutch system may drive an output portion to rotate at a first rotational speed when the clutch surfaces are engaged and to rotate at a second rotational speed when the clutch surfaces are shifted to a disengaged position. The viscous two-speed clutch system may employ a viscous drive system that causes the output portion to rotate even when the clutch surfaces are disengaged. In such circumstances, the cooling fan can be driven to rotate at a first rotation speed due to interconnection with a drive source and to rotate at a second rotational speed even when the clutch surfaces are disengaged. Thus, the clutch system facilitates the flow of cooling air both when the vehicle cooling system activates the fan (e.g. by causing the clutch surface to engage) and when the vehicle cooling system deactivates the fan (e.g. by causing the clutch surfaces to disengage).

Abstract: A force transmitting assembly 20 transmits force to engage and disengage a driven shaft 28. When the force transmitting assembly 20 is engaged, front and rear annular pressure plates 32, 34 frictionally retain a rotor 36 fixedly mounted on the shaft 28 and stops rotation of the shaft 28. The force transmitting assembly 20 maximizes torque and minimizes inertia by providing friction surfaces with friction material substantially engaging the entire working surface of the rotor 36. The force transmitting assembly includes an axially moveable housing 22 attached directly to a mounting flange 24.

Abstract: A dual-rotor force transmitting assembly includes a powerhead assembly having a spring housing, a plurality of first spring sets that generate a braking force for a first rotor and a plurality of second spring sets that generate a braking force for a second rotor. Using separate spring sets for each rotor ensures application of uniform and equal pressure on both rotors even if there is uneven friction surface wear.

Abstract: A compressor for generating compressed air in a vehicle includes a crankshaft and an interface area for fastening a clutch device by means of which the crankshaft of the compressor can be connected to or disconnected from a drive device. The interface area is configured to receive a crucible-shaped receptacle element. The crucible-shaped receptacle element can be a cylinder for receiving a piston that can be acted on by a pressure medium for actuating the clutch device.

Abstract: A multiple-disk clutch has inner and outer clutch members, and a plurality of driving and driven friction disks. The driven and driving friction disks are arranged alternately. A first axially movable pressure member is biased to urge the driving and driven friction disks together in a compression direction. A first actuation system is connected to the first pressure member. The first actuation system is adapted release the compression force exerted by the first pressure member on the driving and driven friction disks. A second actuation system includes a second pressure member and is axially movable to compress the driving and driven friction disks together. The driving and driven friction disks are disposed between the first and second pressure members. The second actuation system is a centrifugal actuation system. The first actuation system is connected to and is axially movable with the second pressure member.

Abstract: The invention relates to a shiftable friction clutch (1a, 1b) for actuation with a pressure medium. Clutches of this type can be used, for example, to drive auxiliary assemblies such as fans (22) in vehicle construction. An especially compact construction is achieved through the use of a disk spring (6). A production method is furthermore proposed.

Abstract: A drive system for a vehicle includes an engine, a transmission, a clutch mechanism including first and second clutch portions, the clutch mechanism being switchable between connected and disconnected states, and a clutch operation mechanism switching the clutch mechanism between the connected and disconnected states, the clutch operation mechanism including a clutch drum forming a drum chamber, a piston dividing the drum chamber into a spring chamber and a pressurizing chamber, a control valve, a biasing member arranged in the spring chamber and exerting a biasing force in a direction in which the first and second clutch portions are engaged with each other, and a bore formed in the clutch drum, the bore discharging oil of the spring chamber to an outer side of the spring chamber in a state where a counteracting force against a centrifugal force acting in the pressurizing chamber is generated in the spring chamber.

Abstract: A clutch device for a vehicle includes an input shaft, an output shaft coaxially arranged with a rotational axis of the input shaft, first clutch plates, second clutch plates, a piston fitted to a cylindrical portion integrally formed with the output shaft or the input shaft, an elastic member arranged between the piston and the cylindrical portion, a hydraulic chamber defined by the cylindrical portion and the piston, a canceller chamber defined by the cylindrical portion and the piston to connect to an outer side of the cylindrical portion via a discharge hole formed at a portion of the cylindrical portion, the portion being located at a predetermined radial distance from the rotational axis, and a throttle hole formed in a portion of the piston to connect the hydraulic chamber to the canceller chamber, the portion being located at a radially inward side of the portion of the cylindrical portion.

Abstract: A vehicle drive device has an engine, a transmission, a clutch device and a clutch operating mechanism which operates the clutch device to drivingly connect the engine to the transmission. The clutch operating mechanism has a clutch drum secured to the outer circumferential surface of an input shaft of the transmission and holding a second clutch section which is engageable with a first clutch section held on an input member of the clutch device to which a driving power of the engine is transmitted. The clutch drum has a drum chamber, a fixed plate closing an opening of the drum chamber, a piston surrounded by the clutch drum and partitioning the drum chamber into a hydraulic chamber and a spring chamber, and an urging element provided inside the spring chamber to be surrounded by the clutch drum and urging the piston.

Abstract: A clutch system may include in certain embodiments a clutch body attached to a drive member such as a drive pulley, wherein the clutch body may be removed from the drive member without disassembling the clutch body. In various embodiments, the clutch body may include two clutch plates which enclose a spring-loaded pneumatic reciprocating assembly that in operation causes the plates to selectively separate and engage one another. In certain embodiments, the clutch body may be readily attached to a associated drive pulley in a single step by installation of a single set of fasteners.

Abstract: Some embodiments of a clutch system or method include a fan clutch device having a clutch shut-off system permits a cooling fan to continue to provide airflow even when the friction ring is worn down to a level that requires replacement.

Abstract: An automatic variable transmission with normally engaged disc clutches includes a main transmission pump connected to the transmission and at least one clutch located within the transmission. The clutch is in an engaged position when the main transmission pump is not operating. The clutch assembly includes a piston moveable between an engaged position and a disengaged position and at least one spring is operably connected to the piston. The piston is operable to move the at least one spring between the engaged position and a disengaged position. A plurality of clutch plates may transfer torque when the at least one spring is in the engaged position.

Abstract: A torque head for gripping tubular members, in at least some aspects, has a housing, grip mechanism secured within the housing, the grip mechanism for selectively gripping a tubular member, the grip mechanism including at least one jaw selectively movable toward and away from a portion of a tubular member within the housing, the at least one jaw having mounted thereon slip apparatus for engaging the portion of the tubular member, the slip apparatus including die apparatus movably mounted to the at least one jaw, the die apparatus movable with respect to the at least one jaw so that relative movement of the tubular with respect to the torque head is possible to the extent that the die apparatus is movable.

Abstract: The invention relates to a transmission module (10) for an engine-transmission unit, said module comprising an input shaft (11) for connecting to a heat engine, an output shaft (12) for connecting to a gearbox, and a clutch (30) connecting said two shafts. The inventive module also comprises: an independent casing (16) comprising a first half-shell (17) and a second half-shell (18), said two half-shells forming a sealed receiving element (22) containing the clutch (30) which is naturally in the engaged position; a mechanical element (35) for maintaining the clutch (30) in said engaged position by means of a piston in the form of a disk; a hydraulic control circuit (40, 41) for acting directly on the piston against the mechanical element, in the disengaged position of said clutch (30); and a hydraulic circuit (50, 52, 53, 55, 56) for lubricating and cooling the clutch. The invention can be applied to an engine-transmission unit for motor vehicles.