Abstract: A power divider for motor vehicles includes a housing, a primary shaft and a secondary shaft, wherein a friction clutch having an outer part that is rigidly connected to the primary shaft, and an inner part, derives torque from the primary shaft and delivers the torque to the secondary shaft by means of the inner part and a displacement drive. To ensure a sufficient supply of lubrication oil under all conditions, an oil reservoir, which at least partially surrounds the ramp ring, is fixed in the housing between the coupling and the displacement drive. The base of the oil reservoir comprises at least one opening, which is adjacent to the upper part of the periphery of the ramp ring, and the oil reservoir has at least one guiding device that extends into the centrifugal area of the displacement drive, through which the centrifuged lubrication oil is received in the reservoir.

Abstract: When an armature plate is attracted to a rotor so that the turning force of the rotor is transmitted to the armature plate, the turning force of the armature plate is transmitted to a main shaft via a plate spring. An angle (hereinafter referred to as a slope angle) formed between the plate spring and the armature plate is set so as to be not smaller than 10° and not larger than 63°. Therefore, since the slope angle is larger than the slope angle (about 3°) of the general electromagnetic clutch, the torque increase effect increases about 5 percent as compared with the general electromagnetic clutch, and also an excessive pressing force of the plate spring does not develop.

Abstract: A rotational coupling device for use as a clutch and/or brake is provided having structure to compensate for wear on braking surfaces. The device includes an armature coupled to an output member and movable between positions of engagement with a rotor and a brake plate. The brake plate is coupled to a stationary field shell that houses a conductor on one side of the rotor opposite the armature and brake plate. The brake plate is axially spaced from the field shell and a removable shim or adjustable spacer is disposed between the brake plate and the field shell. Removal of the shim or adjustment of the spacer permit movement of the brake plate towards the field shell to compensate for wear in the clutch and/or brake engagement surfaces of the device.

Abstract: A driving force transmitting apparatus includes: a first torque-transmitting member having a cylindrical portion and provided with a spline tooth; a second torque-transmitting member positioned inside the cylindrical portion and arranged coaxially rotatably relative to the first torque-transmitting member; a main clutch with a spline tooth; an actuator unit for actuating the main clutch to be engaged; and a controlling device for controlling the actuator unit so as to pressurize the main clutch plate in such a manner that torque is not substantially transmitted between the first torque-transmitting member and the second torque-transmitting member when the engagement of the main clutch is judged to be unnecessary.

Abstract: A clutch generating stress equally at a plurality of bridges parts of a driving side clutch plate to thereby prevent bridge parts from breaking easily during transmission of drive power, wherein a plurality of hole parts 13c and 13d are formed, arranged in a circumferential direction, respectively at the outer circumference side and inner circumference side of a driving side clutch plate 13b, and bridge parts 13e and 13f are formed adjacent in a circumferential direction between the hole parts 13c and 13d, the driving side clutch plate 13b comprises a friction surface 13a pressed to the driven side clutch plate 18 and an opposite friction surface 13h on the opposite side of the friction surface, and a thickness t1 of the inner circumference side is greater than a thickness t2 of the outer circumference side of the same with respect to the plate thickness between the friction surface 13a and the opposite friction surface 13h.

Abstract: An electromagnetic clutch includes a coil generating a first magnetic flux or a second magnetic flux depending on the direction of current flowing therein, a stationary core accommodating therein the coil, a stationary magnet providing a magnetic flux that opposes the first magnetic flux, a rotor rotatable concentrically with a rotatable shaft, a moving core fixed to the rotor, a moving magnet providing a magnetic flux that opposes the second magnetic flux, a sun gear fixed to the rotatable shaft, an internal gear fixed to the rotor, a planetary gear meshed with the sun gear and the internal gear, an arm supporting the planetary gear, a pulley rotatable concentrically with the rotatable shaft, a first armature being capable of coupling to the stationary core, and a second armature being capable of coupling to the moving core.

Abstract: An electromagnetic clutch according to the present invention includes a rotor unit (11) intended to receive power from an engine of a vehicle. The rotor unit (11) has a pulley (111) around which an endless belt is passed, and a rotor (112) disposed inside the pulley (111). The pulley (111) and the rotor (112) are integrally joined together by fitting dowels (111c) projecting from an inner cylindrical surface of an inner rim (111a) of the pulley (112), into holes (112d) in an outer cylindrical surface of the rotor (112) and caulking the dowels to join the dowels and the holes (112d) together.

Abstract: The present invention relates to a field coil assembly of an electromagnetic clutch for a compressor. The present invention comprises a core 210, and a coil 240 installed to the core 210 and formed by winding a unit wire 250. At this time, the unit wire 250 wound on the coil 240 is made of aluminum, and an area ratio R of an inner sectional area M of the core 210 to a cross-sectional area of the unit wire 250 is 400 to 640. According to the present invention as above, since the unit wire 250 used for the coil 240 is made of aluminum with a small specific weight and low price rather than copper, the weight of the field coil assembly 200 is decreased to improve fuel efficiency of a vehicle and decrease a production cost of the field coil assembly 200.

Abstract: A supercharger control system is installed at the bottom front end of the engine, directly onto the crankshaft. An accessory drive belt around the accessory belt pulley rotates continuously to keep vehicle accessories operating. A second belt around a larger pulley drives the supercharger blower. When the dashboard mounted switch is turned on, electricity from the engine energizes an electromagnet, which compels engagement of the rotating accessory pulley with the supercharger pulley by means of a slide plate. The belt around the supercharger pulley then rotates, operating the supercharger. If the driver does not require extra power and performance delivered by the supercharger, the switch is turned off, stopping the flow of electricity. This shuts down the magnetic field, causing the pulleys to be disengaged and disconnecting the supercharger, while still allowing the crankshaft to operate the accessories.

Abstract: A rotational coupling device for use as a clutch and/or brake is provided with improved retention of a drive key during shipping, assembly, and operation of the device. The device includes a rotor disposed about an input shaft. The input shaft is disposed about a rotational axis and the rotor and input shaft define opposed keyways. A key is disposed in the keyways and rotatably couples the rotor and input shaft. An armature is disposed about the axis and coupled to an output member and configured for selective engagement with the rotor. In one embodiment, the key and a support member in the device are shaped in a complementary fashion to limit radial and axial movement of the key. In another embodiment, an axial end of the key or rotor is deformed to axially align the axial ends of the key and rotor and limit axial movement of the key.

Abstract: The present invention is a magnetic clutch pulley, in which the welding deformation and the occurrence of beads can be reduced, thereby maintaining rotation balance. The invention includes: a hollowed housing 30 having belt grooves 31 formed on an outer circumferential surface thereof; and a rotor 32 provided with a disk 33 inserted into the housing 30 to form a space in which a field coil body 36 can be mounted and having a plurality of circular arc slots 34 formed along the same circumference of the disk 33, wherein the housing 30 and the rotor 32 are positioned on a concentric circle of the disk 33, and a plurality of connecting projections 35 are formed along a circumference of the disk 33 to be coupled to the housing 30.

Abstract: A rotational coupling device for use as a clutch and/or brake is provided having a construction enabling improved torque transfer characteristics. The device includes a rotor rotatably coupled to an input shaft and an armature coupled to an output member and configured for selective engagement with the rotor. The rotor includes a hub having a central bore into which the input shaft extends. A support member, such as a spacer or pulley hub is coupled to the rotor hub using an axially projecting lug and notch construction. The structure of the device provides greater clearance for the input shaft and may eliminate the need for keys on the support member.

Abstract: An electromagnetic friction clutch has at least two clutch parts that are mounted so as to be rotatable relative to each other and movable toward and away from each other and that touch each other with a contact force in the position of use. The clutch parts are located in a magnetic circuit, which is guided in the clutch parts in a soft magnetic material in sheet form. Positioned in the magnetic circuit is an electromagnet having a soft magnetic core and a coil. The magnetic circuit has air gaps between the soft magnetic core and at least one of the clutch parts. The flux density in the magnetic circuit, and thus the contact force, is modifiable via the current applied to the coil. The magnetic flux changes at least ten flux crossover points one after the other in the direction of flow between the clutch parts. The cross section of the magnetic flux in at least one air gap is at least five times greater than the smallest flux cross section in the soft magnetic material.

Abstract: An electro-slip clutch may include a friction stack for receiving input rotation from an input shaft and a surrounding hub and for attaching to an output member. A bearing surface may be provided adjacent the friction stack and a solenoid may further be provided. The solenoid may include a plunger in a first position pressing against the bearing surface with a first degree of force and in a second position different than the first position relative to the bearing surface. Thus, torque transmitted through the friction stack is adjustable by the solenoid. A method of operating a clutch mechanism may include providing a solenoid adjacent a friction stack and providing a first current level to the solenoid, the first current level energizing a coil of the solenoid and pushing a plunger within the solenoid towards the friction stack with a first degree of force.

Abstract: A rotational coupling device for use as a clutch and/or brake is provided having improved magnetic efficiency and structural integrity. A field shell and a rotor of the device each define radially spaced, axially extending inner and outer poles. The inner pole of the rotor is disposed radially outwardly of the inner pole of the field shell resulting in improved magnetic efficiency.

Abstract: A device for transmitting the movement to a fan for cooling the cooling fluid in a motor vehicle, mounted, by means of an idle support, on an axis parallel to the longitudinal axis (X-X) of the driving shaft of the vehicle, said device comprising movement generating means which are coaxial and integral with the driving shaft; means for transmitting the movement of the driving shaft to a first clutch; at least one first friction clutch with an electromagnetic actuating system, which is arranged on an axis parallel to the longitudinal axis (X-X) of the driving shaft and the rotor of which is connected to said movement transmission means and the engagement of which produces a rotation of the fan at a number of revolutions at least equal to that of the movement generating means.

Abstract: An electromagnetic clutch includes an armature plate connected to a shaft and being movable axially with respect to the shaft, a rotor being rotatable relative to the shaft, and a plurality of electromagnetic coils, wherein when at least one of the electromagnetic coils are energized a magnetic field will draw the armature plate into contact with the rotor such that the rotor and the shaft are rotatably connected. The magnetic coils are connected to a common power supply providing the magnetic coils a common, non-varying, voltage and a master control switch selectively supplies power from the power supply to the magnetic coils. The magnetic coils are connected to one another in parallel and each coil has a switch to allow each coil to be energized independently of the other coils, individually or in any combination to provide a magnetic field of varying strength.

Abstract: The present invention provides an electromagnetic clutch that can restrict output torque to a predetermined range against the variation of the voltage of the power supply and the environmental temperature. The electromagnetic clutch comprises: an armature; a rotor that attracts the armature; a plurality of slits that are formed in the armature and the rotor around circumferential directions thereof; and a plurality of annular attraction surfaces that are formed on the armature and the rotor which face each other. At least one of the circumferential sections cut in the circumferential direction at the position in the armature and the rotor where respectively face an inner slit wall of the other party, and at least one of the attraction surfaces are substantially equal to each other in area.

Abstract: A pulley integrally has a hub, an outer rim and a flange joining the hub and outer rim. A flux ring is press fitted to the inside surface of the outer rim. The flux ring has an inner diameter sized to closely encircle an electromagnetic coil mounted on a compressor housing. The pulley assembly provides a simple method of providing different sized pulleys for a compressor, enabling different sized engines to utilize a common compressor.

Abstract: An inexpensive electromagnetic clutch device with high precision, which can be manufactured by a simple method, is provided, which clutch device includes: a base member for supporting an entire clutch; a shaft securely fixed to the base member; a rotor arranged onto the shaft, rotatably relative to the base member around the shaft; an electromagnetic coil for causing an electromagnetic force on the rotor when energized; an armature attracted to the rotor and frictionally coupled with the rotor when electromagnetic coil is energized and a torque transmission member coupled to the armature and a member to be driven.

Abstract: An actuating device has an electric motor actuator, at least one output shaft coupled to at least one positioning element and a braking to stop device coupled with the electric motor actuator on the input side and with the output shaft on the output side or includes the output shaft. The braking to stop device has a brake body coupled with the output shaft and is arranged such that it is axially displaceable. The braking to stop device is constructed such that it makes it possible to convert a rotational motion on the input side into the axial lifting motion of the braking body for the displacement thereof from a braking position or positioning the braking body in a braking position. The braking to stop device is also constructed in such a way that it transmits the rotational motion on the input side to the braking body.

Abstract: The electromagnetic clutch comprises a rotor connected to a drive source, an inner hub connected to a device that follows, an outer plate provided on the outside of the inner hub so as to enclose it, an armature coupled to the outer plate and opposing the rotor, an elastic member provided between the inner hub and the outer plate and adhered thereto, and an electromagnetic coil for, when magnetized, attracting the armature together with the outer plate to make them come into contact with the rotor, and when demagnetized, separating the outer plate and the armature from the rotor. Because of the configuration in which the armature and the outer plate are coupled in a heat-transmissible manner, a part of elastic member is formed so that heat is transmitted from at least a part of the armature to the part of the elastic member as if they are one piece.

Abstract: The outer peripheral portion of a drive shaft has a first restriction surface in an integrated manner. The inner peripheral portion of a boss has a second restriction surface in an integrated manner. The second restriction surface faces the first restriction surface in a radial direction. When the electromagnetic coil is not energized, there is a disconnection distance D between the first friction surface and the second friction surface. The distance between the axis and the outermost periphery of the second friction surface is the clutch radius R. A noise preventing space is provided at a point spaced from the bearing to the front by a beam size L2 between the first restriction surface and the second restriction surface. The size d of the noise preventing space satisfies d<D×(L2)/R. Accordingly, abnormal noises coming from the electromagnetic clutch are suppressed.

Abstract: To prevent coupling breakage between an elastic body and an outer ring due to friction heat of an armature and a rotor, an solenoid clutch coupling is provided with an elastic body (3) elastically coupling a hub (10) attached to a rotation shaft (6), and an outer ring (20) coupled to an armature (5) solenoidally moved close to and apart from a rotor (4), a sleeve (40) buried in an outer peripheral portion of the elastic body (30), a fit layer (32) constituted by a part of the elastic body (30) in an outer peripheral side of the sleeve (40) and attached to an inner peripheral surface of the outer ring (20), and non-cylindrical surfaces (21a) engaging with the fit layer (32) in a circumferential direction, and axial stoppers (23, 24) to an outer periphery of the elastic body (30) in a sleeve (21) of the outer ring (20).

Abstract: An electromagnetic clutch for separably coupling a drive source and a rotary shaft has a rotor to be disposed in the outside of the rotary shaft concentrically therewith. The rotor is rotated by a drive source and accommodates an electromagnetic coil. The electromagnetic clutch has an armature plate that is attracted toward the rotor by an electromagnetic force generated by the electromagnetic coil so as to adhere to the rotor. Furthermore, the electromagnetic clutch has a coupler for coupling the armature plate and the rotary shaft to each other. The coupler includes a center part to be coupled to the rotary shaft and an elastically-deformable outer part for coupling the center part to the armature plate, the outer part being extended from the center part and elastically deformed when the armature plate is attracted to the rotor.

Abstract: A rotational coupling device for use as a clutch and/or brake is provided having a construction enabling improved torque transfer characteristics. The device includes a rotor rotatably coupled to an input shaft and an armature coupled to an output member and configured for selective engagement with the rotor. The rotor includes a hub having a central bore into which the input shaft extends. A support member, such as a spacer or pulley hub is coupled to the rotor hub using an axially projecting lug and notch construction. The structure of the device provides greater clearance for the input shaft and may eliminate the need for keys on the support member.

Abstract: A driving apparatus for a movable member of an automobile comprises a housing, a drum for driving the movable member, the drum being rotatably supported on the housing, and a clutch for selectively transmitting a driving torque to the drum, wherein the clutch is accommodated in a space of the drum.

Abstract: An electromagnetic clutch 1 has a construction in which an armature 5 and a plate 7 sandwich an elastic member 9 between them. A spring portion 7d is formed in the plate 7 and an elastic member 9a is so disposed as to cover a front side of the spring portion 7d, too. Elastic members 9b, 9c and 9d are disposed in a thin film form on an inner surface of elongated holes 5a of the armature 5 and the innermost and outermost diameter portions 5b and 5c of the armature 5. The distal end of each elastic member 9b, 9c and 9d is extended to the same plane as an end face 5d of the armature 5 on the rear side or to a position somewhat protruding from the end face on the rear side.

Abstract: In an electromagnetic clutch, an electromagnetic coil is energized to couple a rotor and an armature plate to each other. Each leaf spring extends in a direction so as to intersect at an obtuse angle with the rotating direction of the armature plate, and accordingly, when the power of the driving source is transmitted to the armature plate through the rotor, a compressive force acts upon the leaf spring. The leaf spring has an inclined portion, and the armature plate is pressed against the rotor by the compressive force. Each leaf spring has a first extended portion located between the first coupling portion and inclined portion thereof and a second extended portion located between the second coupling portion and inclined portion thereof.

Abstract: An electric power connection part of an electromagnetic clutch field coil assembly connected with an electric power connector at a side of a vehicle engine includes a housing assembly connected to the field coil assembly with electric wires, which is extracted therefrom, interposed therebetween; a discharge device for absorbing a surge voltage; and a magnetic field elimination device for eliminating a residual magnetic field are injection molded and combonined within the housing assembly. Accordingly, on the electric power connection part has an advantage in that it is not directly influenced by heat radiated from a field coil assembly so that electric/electronic devices can be prevented from being damaged; since an epoxy applying process for attaching electric/electronic devices such as a discharge device and a magnetic field elimination device is omitted, a manufacturing process is greatly simplified; and the number of components are reduced so that manufacturing process thereby decreasing costs.

Abstract: A rotating machine having an electro-magnetic clutch includes: a leakage magnetic flux path formed between the electro-magnetic clutch and a housing via the rotary shaft when a portion of the magnetic flux generated by the electro-magnetic clutch leaks out; a Hall-effect IC, which is arranged in the leakage magnetic flux path, for detecting an amount of the leakage magnetic flux passing in the Hall-effect IC; a variable leakage magnetic flux portion which composes a portion of the leakage magnetic flux path and is rotated by the rotary shaft; and an ECU for detecting a state of rotation of the rotating machine from a change in the leakage magnetic flux detected by the Hall-effect IC.

Abstract: An electromagnetic clutch includes an armature plate connected to a shaft and being movable axially with respect to the shaft, a rotor being rotatable relative to the shaft, and a plurality of electromagnetic coils, wherein when at least one of the electromagnetic coils are energized a magnetic field will draw the armature plate into contact with the rotor such that the rotor and the shaft are rotatably connected. The magnetic coils are connected to a common power supply providing the magnetic coils a common, non-varying, voltage and a master control switch selectively supplies power from the power supply to the magnetic coils. The magnetic coils are connected to one another in parallel and each coil has a switch to allow each coil to be energized independently of the other coils, individually or in any combination to provide a magnetic field of varying strength.

Abstract: The present invention provides an electromagnetic clutch for compressor which can reduce magnetic resistance between a core ring and a rotor without reducing a gap in the radial direction between the core ring and the rotor.

Abstract: The present invention provides an electromagnetic clutch for compressor which can align axial centers of a core ring and a rotor with high accuracy. In the present invention, since a support portion 22c for supporting a rotor 11 is provided integrally on a core ring 22, the core ring 22 can be formed coaxially with the support portion 22c, and the rotor 11 supported by the support portion 22c and the core ring 22 can be arranged on the same axial center without separate alignment. In this case, since a fixed portion 22b is engaged with an engagement portion 4c of a compressor body 4 so that movement in the radial direction is regulated, the core ring 22 is not displaced in the radial direction with respect to the compressor body 4, and the axial centers of the core ring 22 and a rotational axis 1 can be aligned with high accuracy. By this, a gap G between the core ring 22 and the rotor 11 can be made smaller, and the permeability between the core ring 22 and the rotor 11 can be improved.

Abstract: An electromagnetic clutch capable of reducing attracting noise generated when an armature plate is attracted to the friction surface of a rotor, wherein the thickness of the projected part (32) of an elastic member (31) in the state of being compressingly held by an inner plate (26) and the armature plate (12) is increased more than the thickness of the projected part (33) of the elastic member (31) in the state of being compressively held by an outer plate (17) and the armature plate (12), whereby the volume of the projected part (32) of the elastic member (31) can be increased relative to that of the projected part (33).

Abstract: An electromagnetic clutch comprises: a drive shaft of a compressor in an air conditioner for a vehicle in which a combustible refrigerant or a CO2 refrigerant circulates; a rotor which is rotated about the drive shaft by receiving a motive power from an engine or a motor of the vehicle; and a torque limiter connected to an armature disposed so as to face the rotor through an elastic member, the torque limiter being rotated integrally with the drive shaft, in which the torque limiter includes a transmission cutting-off portion for, when the state of a lock is caused in the drive shaft, perfectly separating the armature side from the drive shaft side, and for, unless the lock state is released, prohibiting the connection between the armature side and the drive shaft side from being recovered.

Abstract: To prevent coupling breakage between an elastic body and an outer ring due to friction heat of an armature and a rotor, an solenoid clutch coupling is provided with an elastic body (3) elastically coupling a hub (10) attached to a rotation shaft (6), and an outer ring (20) coupled to an armature (5) solenoidally moved close to and apart from a rotor (4), a sleeve (40) buried in an outer peripheral portion of the elastic body (30), a fit layer (32) constituted by a part of the elastic body (30) in an outer peripheral side of the sleeve (40) and attached to an inner peripheral surface of the outer ring (20), and non-cylindrical surfaces (21a) engaging with the fit layer (32) in a circumferential direction, and axial stoppers (23, 24) to an outer periphery of the elastic body (30) in a sleeve (21) of the outer ring (20).

Abstract: Autopilot control of an aircraft is accomplished using a servo wherein the input shaft and output shaft are collinear. In one embodiment, the output shaft is supported, in part, by the input shaft. In further embodiments an engage clutch mechanism is provided to allow decoupling of the motor from the output shaft, and a slip clutch mechanism is provided to limit the torque output of the servo to enhance the safety of operation. The collinear shaft arrangement enables the engage clutch mechanism and slip clutch mechanism to synergistically utilize components for multiple functions.

Abstract: Device for transmitting a rotating movement from movement generating means to a driven shaft, comprising at least one friction coupling and at least one induction coupling, arranged between said movement generating means and the driven shaft and coaxial with each other, said induction coupling being arranged on a middle diameter greater than the middle diameter on which the friction coupling is arranged.

Abstract: An electromagnetic clutch assembly of the leaf spring type has leaf springs the inner ends of which are fixed to a drive plate by conventional rivets, and the outer ends of which are fixed to the armature plate by special rivets having enlarged diameter shanks that extend through clearance holes in overlaying portions of the drive plate. Rubber damper rings are trapped beneath an enlarged head of the rivet, against the outer surface of the driver plate, without intruding into the radial clearance. The clearance holes allow the rubber rings to compress freely as the leaf springs flex when the clutch is activated. During operation, the transmission of torsional vibrations back through the drive plate and springs to the armature plate is dampened by the compressed rubber rings.

Abstract: In the disclosed electromagnetic clutch, a bent porion (15a) of a plate (15) comes into contact with an armature (6) attempting to move beyond a predetermined movable range, thereby restricting the movement of the armature (6). As a result, if an elastic member (14) is fused, a trouble is prevented which otherwise might be caused by the movement of the now-unsupported armature (6) beyond a predetermined movable range.

Abstract: An electromagnetic clutch assembly of the leaf spring type has leaf springs the inner ends of which are fixed to a drive plate by conventional rivets, and the outer ends of which are fixed to the armature plate by special rivets having enlarged diameter shanks that extend through clearance holes in overlaying portions of the drive plate. Rubber damper rings are trapped beneath an enlarged head of the rivet, against the outer surface of the driver plate, without intruding into the radial clearance. The clearance holes allow the rubber rings to compress freely as the leaf springs flex when the clutch is activated. During operation, the transmission of torsional vibrations back through the drive plate and springs to the armature plate is dampened by the compressed rubber rings.

Abstract: The electromagnetic clutch comprises a rotor connected to a drive source, an inner hub connected to a device that follows, an outer plate provided on the outside of the inner hub so as to enclose it, an armature coupled to the outer plate and opposing the rotor, an elastic member provided between the inner hub and the outer plate and adhered thereto, and an electromagnetic coil for, when magnetized, attracting the armature together with the outer plate to make them come into contact with the rotor, and when demagnetized, separating the outer plate and the armature from the rotor. Because of the configuration in which the armature and the outer plate are coupled in a heat-transmissible manner, a part of elastic member is formed so that heat is transmitted from at least a part of the armature to the part of the elastic member as if they are one piece.

Abstract: Device for transmission of the movement to a fan (1) for cooling the coolant in a motor vehicle, comprising means (21;141;31a) for supporting the fan (1) on which the fan (1) is mounted by means of an idle support (1a), means (3) for generating the movement, a first electromagnetic clutch (30), engagement of which produces rotation of the fan (1) at a number of revolutions equal to that of the movement generating means (3); also comprising means (50;150;250;350;450) for stopping rotation of the fan (1) in its idle condition.

Abstract: A driving apparatus for a movable member of an automobile comprises a housing, a dram for driving the movable member, the dram being rotatably supported on the housing, and a clutch for selectively transmitting a driving torque to the dram, wherein the clutch is accommodated in a space of the dram.

Abstract: An electromagnetic clutch 1 has a construction in which an armature 5 and a plate 7 sandwich an elastic member 9 between them. A spring portion 7d is formed in the plate 7 and an elastic member 9a is so disposed as to cover a front side of the spring portion 7d, too. Elastic members 9b, 9c and 9d are disposed in a thin film form on an inner surface of elongated holes 5a of the armature 5 and the innermost and outermost diameter portions 5b and 5c of the armature 5. The distal end of each elastic member 9b, 9c and 9d is extended to the same plane as an end face 5d of the armature 5 on the rear side or to a position somewhat protruding from the end face on the rear side.

Abstract: An electromagnetic clutch capable of reducing attracting noise generated when an armature plate is attracted to the friction surface of a rotor, wherein the thickness of the projected part (32) of an elastic member (31) in the state of being compressingly held by an inner plate (26) and the armature plate (12) is increased more than the thickness of the projected part (33) of the elastic member (31) in the state of being compressively held by an outer plate (17) and the armature plate (12), whereby the volume of the projected part (32) of the elastic member (31) can be increased relative to that of the projected part (33).

Abstract: The subject invention improves the electrical connection in a clutch assembly for engaging a compressor in a vehicle air conditioning system. In accordance with the subject invention, a tab extends from the mounting plate and the second end of the ground lead is frictionally retained between the tab and the core winding housing. This is accomplished by turning a tab out of the plane of a mounting plate, placing the second end of the ground lead under the tab and bending the tab downwardly to clamp the second end of the ground lead between the tab and the core winding housing to frictionally retain the second end of the ground lead between the tab and the core winding housing.

Abstract: An electromagnetic clutch for separably coupling a drive source and a rotary shaft has a rotor to be disposed in the outside of the rotary shaft concentrically therewith. The rotor is rotated by a drive source and accommodates an electromagnetic coil. The electromagnetic clutch has an armature plate that is attracted toward the rotor by an electromagnetic force generated by the electromagnetic coil so as to adhere to the rotor. Furthermore, the electromagnetic clutch has a coupler for coupling the armature plate and the rotary shaft to each other. The coupler includes a center part to be coupled to the rotary shaft and an elastically-deformable outer part for coupling the center part to the armature plate, the outer part being extended from the center part and elastically deformed when the armature plate is attracted to the rotor.

Abstract: An electromagnet assembly for an electromagnetic apparatus has a ring member, a coil bobbin having an electrical wire wound a spool of the ring member, and a ring case. The ring member is disposed in an annular groove of the ring case. An opening is formed through the ring case adjacent to its closed end surface. A connector, which is disposed on the ring case and covers the opening, includes a case having a closed shape and a bottom, and a cap closing an open end of the case. Ends of the electrical wire and ends of a lead wire are joined in the connector. A projection portion is formed around a fringe portion of a first end surface of the cap and abuts an open end surface of the case. The cap is secured fixedly to the case after the projection portion is melted.