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| Number | Title | Issue Date |
| 8130436 | Flexure actuator Implementations of actuators that use flexures to provide support to the actuators and pivoting mechanisms to the actuators. Such actuators can be electromagnetically activated actuators that include a magnet stator and a coil rotor mounted on a flexure. ... | 03/06/2012 |
| 6470918 | Yarn processing system A yarn processing system which includes a yarn feeding device and an accessory device associated with the yarn feeding device. The accessory device has a device which is driven using a signal representing the rotational speed of a component of the yarn fe... | 10/29/2002 |
| 6184640 | DC brushless motor, magnetic bearing device and turbomolecular pump device A turbomolecular pump device having a DC brushless motor provided with a simplified rpm detection mechanism is provided. A pickup coil for detecting a magnetic flux produced by a permanent magnet of the DC brushless motor is built in the motor. Namely, a ... | 02/06/2001 |
| 6140723 | Vibration generating device and oral hygiene device using same An oral hygiene device comprises a rotating body 22 mounted to a rotating shaft 21 of an electric motor 14, an output shaft 11 resiliently supported via a resonance pin 25 to be swingable finely, a drive magnetic body 23 provided on the rotating body 22, ... | 10/31/2000 |
| 6084327 | Internal vibrator supplied with current from a transformer An internal vibrator for compacting concrete and having a vibrator housing in which is disposed an eccentric mass and an electric motor for driving the eccentric mass. The electric motor is supplied via a power supply cord with electric current having a f... | 07/04/2000 |
| 5982059 | Electric generator and lighting assembly A generator and lighting assembly is provided for use on a mechanism, e.g. a power driven tool, having a shaft that is rotated during use. The assembly includes a rotor assembly 122 including a rotor shaft 102 affixed to the mechanism shaft, and a permane... | 11/09/1999 |
| 5950995 | Ring laser gyroscope dither motor structure Disclosed is a dither spring structure and method of dither spring manufacture. The dither spring structure includes a central hub, an outer toroidal rim, a plurality of flexible reeds and a plurality of lobes. The reeds extend between the hub and the rim... | 09/14/1999 |
| 5925958 | DC motor utilizing permanent magnets A motor produces a rotary motion by synchronizing the attractive and repulsive magnetic interactions of magnetic fields. A stator magnetically interacts with a rotor, cycling through changes in magnetic phase. A minimum of energy is required to spin the s... | 07/20/1999 |
| 5793130 | Miniature electric generator and lighting apparatus A miniature electric generator and lighting apparatus is provided for use in a power-driven tool. The apparatus includes a rotor assembly 22 having a permanent magnet, and a stator assembly 24 within which the shaft and magnet are received. The stator ass... | 08/11/1998 |
| 5770933 | Blower motor with adjustable timing A brushless DC motor with an adjustable timing feature is provided. The timing adjustment allows a specific motor's performance to be optimized by compensating for individual variations both in the characteristics of the rotor position sensors as well as ... | 06/23/1998 |
| 5146125 | DC electric rotating machine using hall effect material An electric rotating machine, which can be operated as either a motor or generator, utilizes material exhibiting a Hall effect to replace the normal slip rings or mechanical commutation devices. Preferably, a slab of Hall effect material is curved to exte... | 09/08/1992 |
| 4480205 | Automatic brake control for rotary electric tools An automatic brake control for rotary electric tools such as saws, drills, sanders, grinders and the like comprises a pair of spring biased brake shoes positioned about the periphery of the brake drum of an electric motor which drives the tools. The brake... | 10/30/1984 |
| 4286125 | Electric switch with two switching parts acting at different times An electric switch comprises a switch housing having a contact arm pivotally mounted on a conductive bearing. The contact arm includes a movable contact which is disposed in the housing to engage with a fixed contact of the housing in one position of the ... | 08/25/1981 |
