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7622872 |
Actuator driving apparatus
An actuator driving apparatus comprises the following. A start signal generator generates a start signal having a frequency substantially equal to the resonance frequency of the movable portion of...
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7612479 |
Scanner for equalizing torque constant and reducing torque constant variation
A scanner has a rotor, and a stator disposed in the outside of the rotor. The rotor includes a shaft, and a permanent magnet mounted on the outer circumferential side of the shaft. The stator...
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7598697 |
Electric motor and a method therefor
A motor and a method for serves finding the position of an armature in relation to a stator of the motor. In the method and the motor the armature is driven by an exciting field which is produced...
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7579793 |
System and method for efficient wide dynamic range coil drive
Methods and systems are provided for driving one or more force coils. A system for driving force coils is provided including a PWM drive coupled to a first coil and a linear drive coupled to a...
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7554225 |
Electric motor with a coil arrangement for providing oscillatory linear and rotational movement
An electric motor for a small-scale electrical appliance, such as a toothbrush or shaver. The electric motor includes at least one oscillatory motor component, a magnet arrangement having at least...
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7554224 |
Electromechanical generator for converting mechanical vibrational energy into electrical energy
An electromechanical generator comprising an electromechanical device for converting mechanical vibrational energy into electrical energy, the electromechanical device comprising a housing, an...
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7547136 |
Oscillating weight for recharging the energy source of a portable instrument
The oscillating weight includes a primary oscillating weight ( 10 ) secured to a drive arbor ( 6 ) and at least one secondary oscillating weight ( 20 ), which is mobile relative to the primary...
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7544003 |
Driving assembly of camera shutter and diaphragm
A driving assembly of camera shutter and diaphragm comprises a first stator, a second stator, a coil set and a rotor. The coil set is installed between the first stator and second stator. A first...
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7513703 |
Magnetic actuator and light quantity adjusting device
A magnetic actuator according to the present invention includes a stator yoke made of a magnetic substance and having projecting streaks on the inner circumference thereof to produce magnetic bias...
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7501726 |
Micro-electro-mechanical system (MEMS) and apparatus for generating power responsive to mechanical vibration
A micro-electro-mechanical system (MEMS) power generator employing a plurality of magnetic masses disposed to oscillate on spring elements in a manner that produces an unusually steep flux gradient...
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7495358 |
Vibratory linear actuator and electric toothbrush using the same
A vibratory linear actuator according to one embodiment of the present invention is comprised of a stator having a through hole therein and a winding wire therearound, a movable member having a...
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7485992 |
Armature type electrical generators for self powered cell phones
Self powered cell phones are provided with an armature which is supported to freely oscillate in swinging opposite motions and which includes a wire coil configured to intersect the magnetic flux...
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7485991 |
Ventilation apparatus
A ventilation apparatus includes a stator, a vibrator arranged close to the stator, a permanent magnet to generate a magnet flux to form a path of the magnet flux along the stator and the vibrator,...
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7482718 |
Enhanced internal electrical generator powered by hand-crank
Enhanced internal electrical generators are provided which include pole pieces that form air gaps flanked with conductive wire coils. Rotatable armatures supporting permanent magnets are arranged...
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7446445 |
Vibration motors and electronic devices utilizing the same
A vibration motor and an electronic device utilizing the same. The vibration motor is disposed in a housing to abut the housing. A first case is disposed in the housing. A second case is combined...
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7443060 |
Acoustic compressor with two resonators
A resonator of an acoustic compressor is provided at each side of an actuator so that the two resonators are arranged side by side. Two pistons are provided at the inner ends of the resonators and...
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7443059 |
Linear actuator for both vibrating and rolling movement and electric toothbrush using the same
The linear actuator for both vibrating and rolling movement according to one preferred embodiment of the present invention is comprised of a shaft supported so as to be movable reciprocally in an...
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7440689 |
Electromagnetically actuated adjusting apparatus for lens
An electromagnetically actuated adjusting apparatus for lens is disclosed. The adjusting apparatus comprises a body capable of furnishing a lens inside, at least one permanent magnet, a first...
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7436094 |
Rotary actuator
A rotary actuator has a stator having plural permanent magnets 1 a and 1 b ; a rotor having a rotor core 3 which plural salient poles 3 a and 3 b are formed at, and one or more rotor coils...
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RE40503 |
Hybrid rotary actuator
A rotary actuator ( 16 ) includes a rotor ( 48 ) which is disposed in a housing ( 34 ) between first and second pole pieces ( 42 and 44 ) of a stator ( 40 ). The rotor ( 48 ) is rotatable...
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7420449 |
Mirror actuating device for projection systems
A magnetic actuator utilizes a single magnet and two voice coils to rotate a mirror between two angular positions with respect to a rest state. A magnetic field assembly applies magnetic flux...
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7411321 |
Electromagnetic engine
An electromagnetic engine has inner and outer rotors having magnets of opposite polarity mounted thereon. Output is taken from the inner rotor, which is free to unidirectionally rotate. The outer...
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7402922 |
Acoustic wave generating apparatus and method
A tactile wave generating apparatus and method to generate amplified low frequency waves which are then transmitted as tactile waves into a structure and/or to a persons anatomy. There is a housing...
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7365613 |
Method of determining resonant frequency
A method for operating a torsion oscillator at its resonant frequency. The method performs an open-loop frequency sweep starting with nominal operation parameters saved from the factory or from a...
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7355305 |
Small-size direct-acting actuator
A direct-acting actuator is provided comprising a stator section ( 16 ), an attachment section ( 6 ) secured to the stator section, micro-beams ( 8, 10 ) extending from the attachment section, a...
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7309933 |
Vibrator for acting on an object in a predetermined direction and apparatus for producing concrete blocks
The invention relates to a vibrator for acting on an object in a predetermined direction, comprising a casing and two identical, synchronously driven, electric linear motor coils arranged...
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7304407 |
Linear oscillating actuator
A linear oscillating actuator gives a smooth reciprocatory movement with a minimum of incidental vibrations or stresses. The actuator includes an oscillator carrying a permanent magnet as well as...
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7291944 |
Electromagnetic engine
An electromagnetic engine has an inner rotor and an outer rotor having magnets of opposite polarity mounted thereon. Output is taken from the inner rotor, which is free to rotate in a single...
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7288861 |
Inertial actuator with multiple flexure stacks
An inertial actuator for active vibration control utilizes a single cylindrical actuator module of the “voice coil” type. A moving armature assembly, including a soft iron shell with a tubular...
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7279816 |
Driving apparatus
The first magnetic body, second magnetic body and third magnetic body have S-pole at the left end and N-pole at the right end. The second magnetic body acts rightward attractive force on the first...
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7279815 |
Swing motor
A swing motor having an opening formed asymmetrically inside a stator. The swing motor is formed with an asymmetrical opening, in particular in a semicircular shape inside the stator. The opening...
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7262567 |
Actuator driving apparatus
An actuator driving apparatus comprises the following. A start signal generator generates a start signal having a frequency substantially equal to the resonance frequency of the movable portion of...
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7262535 |
Rotor shaft for limited rotation motors and method of manufacture thereof
A limited rotation motor system that includes a rotor is disclosed wherein the rotor includes a sleeve with a first open end and an a second end having an integral closed end element, and a...
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7256519 |
Linear actuator and pump device and compressor device therewith
A linear actuator includes a driving part having an inner yoke, an outer yoke and a coil for generating an alternating magnetic field and includes a movable body provided with a magnet disposed...
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7243734 |
Power tool with battery power supply
The present invention relates to a power tool with battery power supply comprising a main body and a detachable battery package which are connected with each other via a securing frame and a...
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7242123 |
Actuator, light quantity adjusting apparatus, and stepping motor
An actuator maintains high efficiency, can react to an increase in pole, has a high part fit, and can be manufactured at low cost while it is thinned. The actuator includes a magnet which is formed...
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7242103 |
Downhole electrical power generator
A downhole electrical power generator. A downhole electrical power generating system includes a flow restricting device which variably restricts flow through an opening, the restricting device...
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7239053 |
Vibrator motor
A vibrator motor has a stationary piece and a moving piece hinged at one end. The moving piece does not generate substantial internal spring forces under the influence of an electromagnetic field,...
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7218018 |
Actuator
An actuator includes a casing, a stationary member having a coil member and mounted in the casing and a movable member having a moving element and supported by the casing. The moving element has a...
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7170205 |
Internal weight type vertical vibrator
Disclosed is an internal weight type vertical vibrator including: a housing; a magnetic circuit unit placed in the internal space of the housing, and comprising a magnet perpendicularly placed and...
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7157816 |
Motor providing oscillating action for a personal care appliance
The motor assembly which produces an oscillating action for a personal care device includes a horizontally positioned U-shaped stator portion, and an armature portion which includes a torsion...
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7154198 |
Linear motor
In a linear motor having permanent magnets placed on a slider, the slider has slider blocks disposed in such a manner that relative positions between front ends of the slider blocks in a slider...
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7148591 |
Oscillating device
To provide a small-size oscillating device, a coil is disposed on a substrate.
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7126497 |
Self-powered switch initiation system
A self-powered switching system using electromechanical generators generates power for activation of a latching relay. The electromechanical generators comprise electroactive elements or magnetic...
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7122921 |
Top loading internal assembly for a power toothbrush
A first aspect of the disclosure concerns a driving assembly for a power toothbrush which includes a drive member, specifically an E-core electromagnet, a driven member which is responsive to the...
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7116018 |
Electric motor
An oscillating motor has a rotor rotation of about ±15° from a rest position. The rotor has two salient poles which face a respective permanent magnet across a small air gap. The stator has a...
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7106491 |
Split beam micromirror
A system and method of providing a micromirror pixel 400 that is highly resistant to bright failure states. The micromirror 400 uses an asymmetric yoke 402 to ensure the mirror is only...
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7102258 |
Manual electric generating device
The present invention discloses a manual electric generating device, which comprises an upper casing, a lower casing; a rotor, a fixed stand, a hollow cylinder, a coil for generating power supply;...
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7095156 |
Actuator
An actuator 100 of the type employing a two-degree-of-freedom vibration system includes: a pair of first mass portions 1, 11 ; a second mass portion 2 provided between the pair of first mass...
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7053507 |
Linear oscillating actuator system
A linear oscillating actuator system which is capable of canceling out the stator vibrations for driving a load with a minimum of vibrations. The system includes an oscillator carrying a permanent...
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