| 序号 | 专利名 | 申请号 | 申请日 | 公开（公告）号 | 公开（公告）日 | 发明人 |
|---|---|---|---|---|---|---|
| 161 | Electromagnetic clutch | US10188457 | 2002-07-02 | US20030019711A1 | 2003-01-30 | Yasuo Nekado; Masaaki Kusumi; Ken Onoe; Akihiro Iwazaki; Koji Matsubara; Shinji Ohkuma; Tatsuhiro Tomari; Shinichi Inagawa |
| Two sensors are provided on a clutch core. Sensor coils are driven at a high frequency by a high-frequency driving circuit. As the sensors sense a magnetic flux of a magnetic circuit including the clutch core and an armature, the impedance of the sensor coils changes. In accordance with the outputs from the sensor coils at this point, an impedance detecting circuit detects the impedance of the sensor coils. Then, an impedance combining circuit combines the impedance of the sensor coils. On the basis of the combined impedance, a current control circuit controls a current supplied to an exciting coil. Thus, the attracting force of the armature to the core excited by the exciting coil is controlled. | ||||||
| 162 | Bobbin for electromagnet of electromagnet clutch | US937600 | 1997-09-29 | US6069547A | 2000-05-30 | Yuki Sakamoto |
| A bobbin of an electromagnet of an electromagnetic clutch used for a refrigerant compressor for an automotive air conditioning system includes a cylinder and two flanges, each extending radially outward from the an end of the cylinder. The two flanges have several deep excisions at about locations at which weldlines would otherwise occur during the injection molding process for forming the bobbin. The excisions extend from outer fringes of the flanges inward direction almost reaching to the outer edge of the cylinder. By providing such deep excisions at the locations where the weldlines would otherwise occur, the occurrence of such weldlines is prevented, and the distortion stress, that tends to concentrate at such weldlines, may be reduced or eliminated. Accordingly, the warping of the flanges that tended to occur after the injection molding of the bobbin also may be reduced or eliminated. A plurality of shallow excisions also are provided along the outer edge of the flanges to enable the resin to spread in a laminar flow during the potting process of the core assembly which is composed of the core and coil assembly. | ||||||
| 163 | Electromagnetically actuated locking clutch for differential gears of motor vehicles | US882909 | 1986-06-25 | US4733577A | 1988-03-29 | Walter Griesser; Friedrich Schreiner |
| An electromagnetically actuated locking clutch for differential gears of motor vehicles having two concentrically disposed toroidal coils (8, 21) firm on a housing, one for a non-positive disk clutch (14) and the other for a positive claw clutch (26) concentrically disposed in respect thereto. Both clutches (14, 26) connect a hub (2) and a socket (3). The hub (2) and the socket (3) are each non-rotatably connected with a connecting member of the differential gear. The disk clutch (14) is closed by an automatic device when a limit value for a relative speed is exceeded. The claw clutch (26) is optionally closed and automatically opened when a limit value for an actuation period is exceeded. | ||||||
| 164 | Solenoid activated spring clutch | US147139 | 1980-05-06 | US4326613A | 1982-04-27 | Don M. Houlberg |
| A wrap-down spring clutch includes a drum and a spring which are selectively engaged by a solenoid. The solenoid has a coil, which when energized, extends a ferromagnetic plunger. When the coil is energized the plunger is extended out against the spring and urges the same into frictional engagement with the drum. The drum is also ferromagnetic, such that the activation of the coil simultaneously magnetizes the plunger, and creates a magnetic attraction between the plunger and the drum which further urges the plunger against the spring and the drum to produce a wrap-down pressure which effects quick and secure clutch engagement. | ||||||
| 165 | Electro-mechanical device | US734116 | 1976-10-20 | US4095922A | 1978-06-20 | James B. Farr |
| A pump such as a vehicle air conditioner compressor has a compressor shaft, a continuously engine-driven flywheel and means such as an electromagnetic clutch for selectively coupling the flywheel to the shaft to operate the pump. The flywheel also provides a permanent magnet field which field rotates with the flywheel and induces in the windings of a relatively stationary annular stator assembly an electric voltage in response to the rotating magnetic field. The pump shaft, annular clutch actuating coil, annular stator assembly, and permanent magnet flywheel are all generally concentrically disposed and in the order stated. The flywheel is driven any time that the engine is running thereby inducing a voltage in the stator windings and that flywheel also drives the exemplary compressor when the clutch is actuated. | ||||||
| 166 | Electro-magnetically actuated spring clutch | US48313074 | 1974-06-26 | US3905458A | 1975-09-16 | MEHRBRODT ALPHONSO W |
| The electro-magnetically actuated spring clutch has coaxially arranged input and output drums, coil spring, control sleeve and a field coil of an electro-magnetic device disposed and supported within a stationary housing. The coil spring is in engagement with the input and output drums to transmit rotation from the input drum to the output drum. The coil spring is also connected at one end portion to the control sleeve to cause, when the latter is held against rotation, the expansion of the coils of the coil spring and thereby interruption of transmission of rotation from the input drum to the output drum. An armature of washer-like configuration is spline connected to the housing to be fixed against rotation but capable of axial movement toward and away from the field coil and control sleeve. Biasing means is provided to urge the armature in a direction away from the field coil and control sleeve, this biasing force being overcome by the magnetic force generated upon energization of the field coil. The armature and control sleeve have stop members which alternately engage and disengage upon energization and de-energization of the electro-magnetic device and the consequent axial movement of the armature to thereby effect engagement and disengagement of the control sleeve and transmission or cessation of rotation from the input drum to the output drum.
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| 167 | Magnetic coupling devices | US3455419D | 1967-06-20 | US3455419A | 1969-07-15 | MIQUEL JOSEPH |
| 168 | Electromagnetic clutch | US3426875D | 1967-06-26 | US3426875A | 1969-02-11 | STURMER HANS |
| 169 | Electromagnetic clutch or brake with dual coils | US56268766 | 1966-07-05 | US3400797A | 1968-09-10 | HORN JOHN W; SPENCER GLENN S |
| 170 | Cylinder clutch | US11334861 | 1961-05-29 | US3129798A | 1964-04-21 | JACOB RABINOW |
| 171 | Fast response magnetic friction clutch | US87760 | 1960-01-06 | US3019876A | 1962-02-06 | JACOB RABINOW |
| 172 | Electromagnetic clutches and brakes | US78355258 | 1958-12-29 | US3016118A | 1962-01-09 | ZATSKY NORMAN C |
| 173 | Electromagnetic clutch | US65528457 | 1957-04-26 | US2951569A | 1960-09-06 | TOMPKINS RUSSELL E; EDGAR ROBERT F |
| 174 | Electromagnets and more particularly in electromagnetic clutches | US59070656 | 1956-06-11 | US2848085A | 1958-08-19 | RIGHETTO MANNAIONI |
| 175 | Magnetic clutch and control therefor | US27098552 | 1952-02-11 | US2774452A | 1956-12-18 | WISMAN FRANKLIN O |
| 176 | Electromagnetically actuated friction coupling with servo-action | US12365549 | 1949-10-26 | US2649941A | 1953-08-25 | ALBERT DOEBELI |
| 177 | Electromagnetic clutch | US44272930 | 1930-04-09 | US1891982A | 1932-12-27 | HODGSON HOWARD E |
| 178 | Electromagnetic clutch. | US1911608348 | 1911-02-13 | US1031081A | 1912-07-02 | MIRAM KURT; SEIDEL LOTHAR |
| 179 | Electromagnetic clutch. | US1906321867 | 1906-06-15 | US880266A | 1908-02-25 | AST HEINRICH |
| 180 | Magnetic clutch. | US1903168389 | 1903-08-05 | US821022A | 1906-05-22 | CUTLER HENRY H |
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