Abstract: An air maintenance tire pump simulator that simulates the environment of an air maintenance tire system is provided. The simulator includes at least one pneumatic cylinder, a structure that forms a closed cavity, and a pneumatic conduit extending between and fluidly connecting the pneumatic cylinder and the closed cavity. A cam is operably connected to a motor, and is also operably connected to the pneumatic cylinder. Engagement of the motor actuates rotation of the cam, which in turn actuates operation of the pneumatic cylinder to increase a pressure in the closed cavity. A method of simulating an air maintenance tire system is also provided.

Abstract: A pump having at least two fluid drivers and a method of delivering fluid from an inlet of the pump to an outlet of the pump using the at least two fluid drivers. Each of the fluid drives includes a prime mover and a fluid displacement member. The prime mover drives the fluid displacement member to transfer fluid. The fluid drivers are independently operated. However, the fluid drivers are operated such that contact between the fluid drivers is synchronized. That is, operation of the fluid drivers is synchronized such that the fluid displacement member in each fluid driver makes contact with another fluid displacement member. The contact can include at least one contact point, contact line, or contact area.

Abstract: A rotary pump including: a housing having an inlet and an outlet for a fluid, and a delivery chamber connected to the inlet and outlet; a delivery rotor rotatable in the delivery chamber about a rotational axis has a structure which is central in relation to the rotational axis; and a setting structure surrounding the delivery rotor and with the delivery rotor forms delivery cells, delivering the fluid from the inlet to the outlet, can be moved back and forth relative to the delivery rotor, in order to adjust a delivery volume of the rotary pump. At least one of the setting structure and/or the rotor structure is a material composite structure including a molded region made of plastic and a functional region which is fixedly connected to the molded region and made of a functional material which has a different chemical composition to the plastic of the molded region.

Abstract: A variable displacement lubricant pump for providing a pressurized lubricant for an internal combustion engine includes a shiftable control ring, a hydraulic control chamber which directly actuates the control ring, a pump rotor comprising a plurality of slidable vanes which rotate in the control ring, a control chamber wall, a temperature control opening arranged in the control chamber wall, and a temperature control valve which connects or disconnects the temperature control opening to an atmospheric pressure. The temperature control valve comprises a valve plunger which is axially shiftable so as to block or leave open a lubricant passage, and a first bimetal actuator sheet which directly actuates the valve plunger. The first bimetal actuator sheet comprises a first switching temperature. The valve plunger is in an open position if a lubricant temperature exceeds the first switching temperature.

Abstract: An eccentric screw pump comprising an outer part (2) and an inner part (3) therein, one of the parts (2, 3) being driven rotatably and the other part (2, 3) being able to move eccentrically relative to the other part (3, 2). The screwthreads (5a, 5b) of the outer part (2) extend angularly over less than an entire helix along the axial length (L) of the part, so that during operation pumping chambers that are open to both ends are created, through which sudden pressure relief takes place.

Abstract: A scroll compressor is provided that may include a casing; a discharge cover fixed to an inner space of the casing, that divides the inner space of the case into a suction space and a discharge space; a main frame in the casing, and spaced from the discharge cover; an orbital scroll that performs an orbital motion on the main frame; a non-orbital scroll coupled to the main frame so as to be movable up and down with respect to the orbital scroll, that forms a suction chamber, an intermediate pressure chamber, and a discharge chamber together with the orbital scroll; and a back pressure plate provided between the discharge cover and the non-orbital scroll, that forms a back pressure chamber that communicates with the intermediate pressure chamber. With such a configuration, a bypass valve may be easily installed, and application of an overload minimized.

Abstract: A scroll compressor is provided. An interference prevention portion may be formed on a side wall surface of at least one of a fixed wrap or an orbiting wrap. With such a configuration, an end of the fixed wrap may not interfere with the orbiting wrap at an arc compression surface of the orbiting wrap, but rather, be inserted into the interference prevention portion. Accordingly, occurrence of a gap between the fixed wrap and the orbiting wrap may be prevented, and thus, compression efficiency enhanced.

Abstract: The present invention relates to a rotor for a vacuum pump 150 having a roots pumping mechanism, the rotor comprising at least two hollow lobes 160, 162, 164, 166, each lobe having an outer wall 208 which defines a lobe profile, a hollow cavity 210 generally inward of the outer wall, and at least one strengthening rib 226 located in the cavity to resist stress on the lobes generated during rotation.

Abstract: A scroll compressor that includes a housing and scroll compressor bodies disposed in the housing. The scroll bodies include a first scroll body and a second scroll body. The first and second scroll bodies have respective bases and respective scroll ribs that project from the respective bases. Further, the scroll ribs mutually engage such that the second scroll body is movable relative to the first scroll body to compress fluid. A drive shaft has an eccentric drive pin configured to engage a drive hub on the second scroll body. The scroll compress also includes a slider block that fits over the drive pin. The slider block has a first drive surface configured to engage a second drive surface of the drive pin. In particular embodiments, the slider block can tilt about one or more edges of the second drive surface when the drive shaft is deflected under load.

Abstract: A compressor having a compressor wall that has an interior surface that defines a compression chamber, in which a rotor or pair of rotors operates to compress a fluid. To do so, the rotors are in operative communication with the interior surface. The compressor also includes an injection port in the compressor wall and opening into the compression chamber, the injection port being in fluidic communication with a second fluid. The compressor can also include an insert in operative communication with the injection port, wherein the insert and the injection port define therebetween a gap through which the second fluid enters the compression chamber.

Abstract: The disclosure provides pumps that include improvements in construction, which involve bearing surfaces, recirculation paths, mounting footprints, impeller vane starting diameters, canister assemblies, and rotor assembly bushing configurations.

Abstract: A system and method for sensing level of a fluid associated with a submersible pump having an impeller driven by an associated motor include a fluid level sensor having a probe with a plurality of discrete resistive elements each having an associated contact pair substantially evenly spaced along a length of the probe and an associated switch powered by an induced voltage or current generated by power provided to the submersible pump motor and activated by the fluid conducting across the contact pair to shunt the associated discrete resistive element.

Abstract: Systems and methods for sump pump remote monitoring can include control circuitry integrated into a portable housing, with a backup sump pump connected to the control circuitry. The control circuitry can be powered by a line power and when the line power is not available, the control circuitry can be powered by a battery power. The control circuitry can be connected to a control panel, and the control circuitry can include a pressure transducer, the pressure transducer to measure a pressure in a fluid level sensor, and based on the measured pressure, the control circuitry to adjust the speed of the backup sump pump. A wireless controller can be connected to the control circuitry, the wireless controller for wirelessly receiving monitoring instructions and wirelessly transmitting backup sump pump status data, with the control circuitry providing an indication of the backup sump pump status data to the control panel.

Abstract: Provided is a well pump system that includes a pressure pipe, a rotatable shaft surrounded by a plurality of bearings, a pumping mechanism mounted to the pressure pipe and having a plurality of pump impellers mounted to a second end of the shaft, a rotating mechanism mounted to a first end of the shaft and configured for rotating it within the bearings, thereby causing the pump impellers to move the fluid in the pressure pipe, and at least one non-return valve configured for assuming at least two states including a first, opened state, in which the second pipe chamber is in fluid communication with the first pipe chamber, and a second, closed state, in which the non-return valve obstructs the fluid communication between the first and the second pipe chambers, thereby lubricating them.

Abstract: A centrifugal fan assembly includes an impeller assembly which has a fixed stator and a rotating impeller having a base plate, a hub connected to the base plate a plurality of backward curved first blades, and a plurality of backward curved second blades. Each first blade has an inner end which is connected to the hub. Each second blade has an inner end which is spaced apart from the hub and which tapers to a point. The first and second blades have different profiles or shapes. The axial length of the first blades is different from the axial length of the second blades. Each second blade forms an apex which projects axially from the base plate.

Abstract: A gas turbine casing made of organic matrix composite material includes reinforcement densified by an organic matrix defines an inside volume. On its inside face the casing has a structural part with a first face facing the inside face of the casing, and an opposite second face defining a flow passage portion. Recesses opening out into the inside volume of the casing are present between the inside face of the casing and the first face of the structural part facing the inside face of the casing. In the event of a fire, the recesses allow gas coming from degradation of the resin of the casing to be discharged into the flow passage.

Abstract: A flow machine with a rotor-side shaft includes: a stator-side housing in which the rotor-side shaft is mounted; a seal bushing configured to seal a gap between the stator-side housing and the rotor-side shaft; a retaining bolt configured to center the seal bushing at the stator-side housing in a heat-resilient manner; and a clamp configured to fix the seal bushing in a positively engaging manner at the stator-side housing while ensuring a radial displaceability of the seal bushing relative to the stator-side housing.

Abstract: Some embodiments of an apparatus and system are described for a crossflow blower motor. An apparatus may comprise one or more motors operative to control a crossflow blower. The one or more motors may comprise one or more stator assemblies having a stator coil and a bent stator. The one or more motors may be configured to control a crossflow blower arranged to generate a flow of air in a direction substantially perpendicular to an axis of rotation of the crossflow blower. Other embodiments are described.

Abstract: A system may include a reversible fan module that creates an airflow. The reversible fan module may include a set of attachment members, disposed on a face of the reversible fan module, that secure the reversible fan module a first orientation or a second orientation. The system may further include a chassis that include a divider that divides an interior region of the chassis into a front compartment and a rear compartment, a window, disposed on the divider, that allows airflow between the front compartment and the rear compartment, a first opening in the chassis that opens the front compartment to a first external region, a second opening in the chassis that opens the rear compartment to a second external region, and a bay that receives the reversible fan module.

Abstract: An electrical submersible pump assembly has pump, motor and pressure equalizer modules. A first adapter, which secures to the first module, has an external set of first adapter threads. A second adapter, which secures to the second module, has an external set of second adapter threads. A collar has an internal set of collar first threads that engage the first adapter threads, and an internal set of collar second threads that engage the second adapter threads. The collar first and second threads differ from each other, such that rotation of the collar relative to the first and second modules pulls the first and second modules toward each other. The pitches of the collar first and second threads may differ. Or, the collar first and second threads may turn in opposite directions.

Abstract: A system includes a hydraulic energy transfer system configured to exchange pressures between a first fluid and a second fluid. The system also includes a motor system configured to power the hydraulic energy transfer system and a shaft coupling the motor system and the hydraulic energy transfer system. Additionally, the system includes a shaft seal disposed about the shaft. Further, the system includes a pressure compensator configured to reduce a pressure differential across the shaft seal.

Abstract: The present invention is a distributed piston elastomeric accumulator which stores energy when its elastomeric member stretches from its original length in response to the flow of a pressurized fluid. The stored energy is returned when the fluid flow is reversed and the accumulator discharges the fluid as its elastomeric member returns to its original length and moves the piston to its initial position. At least one part of the novelty of the invention is that the accumulator is not subject to radial strain gradients and the accumulator allows for precise pressure and linear position measurements. Accordingly, the invention allows for optimization of the energy strain storage capacity of a given elastomer.

Abstract: A fluid controller includes a valve housing having an inlet port, a return port, first and second control ports and a load sense port. The fluid controller further includes a fluid meter in selective fluid communication with the valve housing and a valve assembly adapted to provide selective fluid communication between the valve housing and the fluid meter. The valve housing includes a main flow path and a load sense flow path. The main flow path is adapted to provide selective fluid communication between the inlet port and the first control port. Fluid in the main flow path passes through the fluid meter. The load sense path is adapted to provide selective fluid communication between the load sense port and the main flow path. The load sense flow path includes a variable load sense orifice that substantially closes prior to a maximum rotational displacement of the valve assembly.

Abstract: A differential cylinder for a hydromechanical drive for actuating an electrical switch, for example a high-voltage switch, is disclosed which includes a first pressure region for applying a working pressure, a second pressure region, and a piston which is capable of moving in a movement region and which is movable depending on a pressure difference between the first and second pressure region. A damping device is provided which, in the event of a movement of the piston in the direction of the second pressure region, provides damping with respect to the movement of the piston in a section of the movement region, wherein the damping is adjustable.

Abstract: A valve (10) for the temperature-dependent control of at least one hydraulic load includes a valve housing (12) with a tank connection (T), a working connection (A), and a supply connection (P). A control piston (30) controls the connections (A, P, T), is moveable in the valve housing (12) and is preloaded by a working spring (74). A thermal element (62) can be supplied with a fluid at a specifiable temperature (TFIuid) and is actively coupled to the control piston (30). The control piston can be moved by control pressure present at the supply connection (P). The thermal element (62) interacts with the working spring (74) such that the thermal element causes a temperature-dependent change of the preload force acting on the control piston (30).

Abstract: An aircraft hydraulic thermal management system utilizes fuel to cool hydraulic fluid by means of a heat exchanger. A hydraulic pump includes a case drain flow of hydraulic fluid at a first temperature to drive a hydraulic motor; the hydraulic motor circulates hydraulic fluid to a reservoir at a second temperature. The heat exchanger is positioned remotely of the fuel tank, and has first and second channels positioned in thermal communication to transfer heat from the hydraulic fluid to the fuel. The hydraulic motor is mechanically coupled to the fuel pump; the hydraulic motor, driven by case drain flow through the first channel, thus operates the fuel pump to move fuel through the second channel. The thermal management system is configured to assure that a) the hydraulic pump circulates hydraulic fluid to the reservoir at the second temperature, and b) the second temperature is always lower than the first temperature.

Abstract: Provided is a slewing drive apparatus for a construction machine capable of satisfactory pump-flow-rate control regardless of change in engine speed, including a variable displacement hydraulic pump, a slewing motor, a slewing operation device, a control valve, a relief valve, and a pump-flow-rate control device that performs a relief cut control and includes: a section for detecting an engine revolution number Ne and a slewing speed of a slewing body; a section for determining a target pump flow rate Qo that is a sum of a slewing-speed correspondence flow rate Q1 and a minimum required relief flow rate Qmin; a section for determining a target pump-tilt-angle qtg obtained by dividing the target pump flow rate Qo by the detected engine revolution number Ne; and a section for adjusting an actual pump-tilt-angle of the hydraulic pump so as to bring the actual pump-tilt-angle to the target pump-tilt-angle qtg.

Abstract: A system comprises a set piece, a threaded block, and a nut and is configured to support a panel in a railing system. The set piece comprises a block portion and a base portion. The block portion has a first planar surface and an opposing, second planar surface. The base portion is planar and extends from an edge of the block portion substantially perpendicular to the first and second surfaces of the block portion and away from the first surface of the block portion. The threaded block comprises a base and an extended circular portion. The circular portion comprises a threaded surface on the circumference, and the threaded block is configured to align with the set piece. The nut is configured to engage the threaded block. The nut comprises a corresponding threaded internal circular surface to rotatably engage the extended circular portion and move orthogonal to the threaded block base.

Abstract: An armrest lock may include a lever coupled to one side of the sliding cover, a rod provided in the sliding cover such that one side thereof is coupled to the lever, a trigger coupled to the other side of the rod and configured to operate in response to a motion of the lever, and a locking element coupled to the opening door and the armrest body and configured to be unlocked from at least one of the opening door and the armrest body when coming into contact with the trigger.

Abstract: An adhesive mounting article includes a flexible adhesive tape structure having a first major surface and a second major surface opposite to the first major surface. The flexible adhesive tape structure includes a peelable adhesive layer disposed on the first major surface and a first separable connecting member disposed on the second major surface. The peelable adhesive layer is capable of adhering to a mounting surface and thereafter being manually removable from the mounting surface by peeling. A rigid faceplate structure includes a rigid faceplate having a first major surface and a second major surface opposite to the first major surface, and a second separable connecting member disposed on the first major surface of the rigid faceplate. The first and second separable connecting members engage with each other to form a separable connection to connect the flexible adhesive tape structure and the rigid faceplate structure.

Abstract: The invention relates to an assembly for a motor vehicle comprising at least a first component and a second component, for example a carrier and a guide rail of a window lifter which are fixed together by means of at least one fastening element, in this case by a plurality of rivets. A fastening element engages into openings of which one opening respectively is formed in a receiving portion of the first component and one on a protrusion of the second component, wherein a protrusion respectively protrudes in an associated receiving portion and a flexible or elastic edge section of a receiving portion can be shifted in the direction of the associated protrusion.

Abstract: A selectively actuatable suction cup construction is configured to be incorporated into an article, such as a kitchen accessory (e.g., a combined trivet and oven mitt product) or other product and is configured such that it can be placed in either an “actuated mode” or an “inactive mode”.

Abstract: A hybrid shaft is provided, particularly a hybrid shaft for a vehicle, for transmitting a torque. The hybrid shaft includes a hollow shaft made of metal, wherein the hollow shaft has at least one reinforcement layer made of fiber-reinforced plastic on an outer surface of the hollow shaft in at least one reinforcement section. The hollow shaft has an external diameter varying in a longitudinal direction of the hollow shaft inside the at least one reinforcement section.

Abstract: A connecting rod (10) has a big end bearing eye (11) for attachment to a crankshaft, a small end bearing eye (12) for attachment to a piston, and an eccentric adjusting device (13) for adjusting an effective connecting rod length. The eccentric adjusting device (13) has eccentric rods (15, 16) that engage on an eccentric lever (14), an eccentric (36) that is guided in an aperture in the eccentric lever (14) and in the small end bearing eye (12) and an aperture for accommodating a piston pin (37). Lubricating oil bores (38, 39) are introduced into the small end bearing eye (12) via which a lubricating oil film can be built up between the small end bearing eye (12) and the eccentric (36). The small end bearing eye (12) has a larger radial wall thickness in those regions in which the lubricating oil bores (38, 39).

Abstract: A linking arm assembly incorporating an improved connection between an elongated rod portion and an engagement element such as a ball stud or the like adapted to join the linking arm to another structure. The linking arm assembly may incorporate an improved ball and socket connection. The socket may include an arrangement of flexible rib elements that are compressed when the ball stud is inserted so as to bias against the ball during use.

Abstract: A universal joint includes a first band and a second band which are separated by a slot, are cylindrical and coaxial with one another with respect to a common axis, a first stiffener whose ends are joined to the first band, and a second stiffener whose ends are joined to the second band. A stem extends between the first stiffener and the second stiffener. A crown is around the stem. Four torsion bars exist, of which two extend between the crown and the first band and two extend between the crown and the second band.

Abstract: The present invention discloses an active airbearing device, including a airbearing body, a gas film active adjusting unit, a support body detection unit and a drive control unit, wherein the support body detection device measures a state of airbearing, the drive control system generates a control signal according to a detection signal, drives and controls the gas film active adjusting device to generate an active action, and dynamically adjusts the form of gas films on a airbearing surface, so as to dynamically adjust pressure distribution of gaps between the gas films of the airbearing device, thereby improving dynamic stiffness characteristics of the airbearing.

Abstract: A rolling bearing with a rotation sensor includes an inner race and an outer race, one of which is a rotating race and the other of which is a stationary race. An annular magnetic encoder alternately magnetized in opposite polarities in its circumferential direction is mounted on the rotating race. A magnetic sensor configured to detect the changes in magnetic flux when the magnetic encoder is rotated is mounted in a resin sensor housing mounted on the stationary race. The sensor housing is made of a resin material including a resin composition containing polyphenylene sulfide, an inorganic filler, and glass fiber.

Abstract: A torsional vibration damper, including: an axis of rotation; a spring retainer plate including a plurality of openings passing through and wholly surrounded by material forming the spring retainer plate and a plurality of rivet tabs, each rivet tab including a respective portion aligned with a respective opening from the plurality of openings so that a line in an axial direction, parallel to the axis of rotation, passes through the respective portion and the respective opening; an intermediate plate; a plurality of rivets passing through the plurality of rivet tabs and connecting the intermediate plate to the spring retainer plate; and a plurality of springs engaged with the spring retainer plate.

Abstract: A variable stiffness structure configured to support a variable load, the variable stiffness structure including a shaft coupled to the variable load, a negative stiffness element, a clutch coupled to the negative stiffness element and configured to disengage and to engage the shaft, in response to a change in the variable load, while the structure supports the variable load.

Abstract: A torque limiter is configured from a ring body and a spring-form part provided in the ring body. The ring body includes a band-form metal plate and is bent approximately into a C-shape along the circumferential direction of a motor shaft and a lock holder. The spring-form part is formed so as to be capable of radial elastic deformation. The spring-form part is configured from main protrusions arranged in a compressed state between the motor shaft and the lock holder, and from sub-protrusions arranged in a non-compressed state. Further, grease is stored in a part or all of the concavities formed by the main protrusions and the sub-protrusions.

Abstract: A clutch assembly is disclosed having a clutch housing and a shaft. A clutch pack selectively couples rotation of the clutch housing and the shaft. The clutch pack includes a primary backing plate, a reaction plate, first and second friction plates disposed between the backing plate and the reaction plate, and a secondary backing plate disposed between the first and second friction plates. A first actuator selectively applies pressure to the reaction plate to move the reaction plate toward the primary backing plate. A second actuator controls movement of the secondary backing plate to switch the clutch pack between a low torque state and a high torque state. In the low torque state, the secondary backing plate cannot move longitudinally toward the primary backing plate beyond a locked position. In the high torque state, the secondary backing plate can move beyond the locked position.

Abstract: A vehicle lock-up clutch control device is provided to suppress engine racing when a lock-up clutch is engaged at the time a vehicle starts moving. The vehicle lock-up clutch control device is provided with a control unit that delays the rise in lock-up command pressure if a line pressure, which is the source pressure of the actual lock-up oil pressure, is rising when the lock-up clutch is engaged at the time the vehicle starts moving. The control unit executes a torque reduction in the engine at least during the delay in the lock-up command pressure.

Abstract: The invention relates to a method for avoiding safety-critical activation of a clutch in a hybrid module of a drivetrain of a motor vehicle, wherein the hybrid module is effective between the internal combustion engine and the transmission and has an electric drive, the clutch and a freewheel, and the clutch is used to start the internal combustion engine by transmitting a torque, supplied by the electric drive or the drivetrain, by a frictionally locking connection to the electric drive or the drivetrain, or for disconnecting the internal combustion engine from the drivetrain for purely electric driving. In a method for avoiding safety-critical activation of a clutch in a hybrid module in which safety-critical driving situations are reliably prevented, a critical interference torque of the clutch is set as a function of ambient conditions of the motor vehicle and/or peripheral conditions of the vehicle, in order to set a safety distance to be maintained by the open clutch.

Abstract: To provide a braking device that achieves unidirectionality without limiting the direction of rotation of a rotor. The present invention is characterized by being equipped with a housing (10), a rotor (20) provided inside the housing (10), brake shoes (30) provided between the rotor (20) and the housing (10), first protruding parts (40) that move together with the brake shoes (30), and second protruding parts (50) that move in conjunction with the rotation of the rotor (20), with the first protruding parts (40) riding up on the second protruding parts only when the rotor (20) rotates in the normal direction, and thereby generating greater friction between the brake shoes (30) and the housing (10) than the friction that can be generated between the brake shoes (30) and the housing (10) when the rotor (20) rotates in the reverse direction.

Abstract: The disk brake device comprises a caliper body including a cylinder part and a pawl part having a notch section connected together by a center bridge and side bridges with notch sections each interposed between the center bridge and side bridges, a support including guide pin guiding parts each interposed between the cylinder part and pawl part, guide pins respectively slidable to the guide pin guiding parts, and an outer side brake pad threadedly engaged with such surface of the pawl part as is opposed to a rotor on the rotor turn-in and turn-out sides of the notch section.

Abstract: A brake assembly having a brake carrier, a housing, and a bridge. The brake carrier may support at least one brake pad assembly. The housing may be disposed on the brake carrier. The bridge may be fixedly disposed on the housing. The bridge may extend over the brake pad assembly.

Abstract: A brake pad 10 can brake a rotation of a disc 200. The brake pad 10 includes a friction material 12 provided on the side of the disc 200 and a back plate 11 bonded to the friction material 12 on the opposite side of the disc 200. A thickness of a central region of the back plate 11 in a rotational direction of the disc 200 is larger than thicknesses of both end regions of the back plate 11 in the rotational direction of the disc. In the case where a minimum value of the thicknesses of the end regions of the back plate 11 is defined as “h1 [mm]” and a maximum value of the thickness of the central region of the back plate 11 is defined as “h2 [mm]”, h1 and h2 preferably satisfy a relationship of “h2?h1<3”.

Abstract: A brake pad (10) for fastening on a brake caliper (110) of a vehicle braking device (100), having a main body (20) and a brake lining (22) arranged over an extended area on the main body (20), wherein the main body (20) has at least two guide openings (24) to receive in each case one guide pin (112), wherein each of the guide openings (24) has a guiding portion (25), wherein the guiding portions (25) of all the guide openings (24) have a radius of guidance (FR) with a common center of guidance (FM).

Abstract: The invention relates to a disc-type brake which can use the energy of a transport machine during its traveling to brake, has a huge self-energizing action and is used for a motorcycle, a car, a truck, a train and an elevator. The brake has a very small control force (power), is simple and reliable and has a small volume. The brake is very easily designed as an electrically controlled disc-type brake system (EMB), the power and volume of an electrically controlled motor of the brake can be several times—more than a dozen of times less than that of an electrically controlled motor in the prior art, after its promotion, the brake can greatly improve the safety of the car and the motorcycle. The brake can reduce many parts, components and mechanisms and save much cost and bring us tremendous social and economic benefits and is a landmark brake.