Celebrity Inventors
Comic actor Danny Kaye received patent D166,807 for the co-design of "Blowout Toy or the Like". It's similar to one of those toys that unravels when you blow into at a birthday party except Kaye's has three blowouts going in different directions, not just one.
PatentStorm News
Make the Most of Our Site
See this month's Top Inventors and Most Cited Patents.
Stay on top of the latest innovations by subscribing to an RSS feed.
Registered users: Manage your profile.
| Number | Title | Issue Date |
| 7888897 | Semiconductor integrated circuit for sensorless driving and sensorless driving system A semiconductor integrated circuit for sensorless driving of a brushless motor, has: an induced voltage detecting circuit which includes a comparator for comparing a voltage induced in an exciting coil by a rotation of a rotor of the brushless motor with a midpoint ... | 02/15/2011 |
| 7852027 | Method and circuit for testing motor A method for testing a motor having a rotor and a winding is provided. The method includes steps of (a) providing a power to rotate the rotor to a predetermined speed, (b) removing the power, (c) measuring a terminal voltage of the winding while a current within the... | 12/14/2010 |
| 7482772 | Motor stop control device utilizable for gaming machine and gaming machine using the same In the motor stop control device according to the embodiment, a main CPU is provided which executes any one of reel stop control process 1 and the reel stop control process 2 when the stop instruction of a stepping motor occurs. In the reel stop contro... | 01/27/2009 |
| 7372227 | Apparatus for braking a synchronous machine A method is proposed for braking a synchronous machine 1, with the armature windings (u, v, w) of the synchronous machine 1 being short-circuited, optionally by interposing at least one braking resistor. In order to keep the braking moment constant ove... | 05/13/2008 |
| 7369383 | Protective circuit A protective circuit (1), particularly for overvoltage-protecting an electronic motor control unit, comprises a signal connection receiving and/or emitting an electrical signal, a switching element (4) which activates or deactivates a protective interr... | 05/06/2008 |
| 7327587 | System and method for power conversion An ac-ac power converter system is provided for supplying power to an electrical load. The ac-ac power converter system provides an output voltage having variable amplitude and/or frequency. The ac-ac power converter system includes a boost inductor for applying a d... | 02/05/2008 |
| 7318121 | Synchronized mirrored data in a data storage device A data storage device mirrors data on a data storage medium. The multiple instances of data are synchronized in order to optimize performance of the reading and writing, and the integrity of the data. Preferably, a data storage device is allowed to defer writing mul... | 01/08/2008 |
| 7315144 | AC drive apparatus, vehicle control apparatus, and power conversion method and vehicle control method A motor is driven with variable frequency AC power converted from DC power, and an AC output power from the motor is converted to DC. In the conversion, an electromotive force regenerated by the motor is consumed by a plurality of resistors. When the consumption of ... | 01/01/2008 |
| 7227331 | Safety interlock and protection circuit for permanent magnet motor drive A circuit for protecting against controller failure wherein the controller provides control signals for controlling a DC to AC inverter fed by a DC bus and driving a permanent magnet motor, the circuit comprising a first circuit for monitoring the DC bus voltage and... | 06/05/2007 |
| 7224137 | Instantaneous fan stopping method and structure thereof The present invention provides an instantaneous fan stopping method and structure thereof. The method and structure can eliminate the inertial rotating state of the fan when the power supplied to the fan is cut off. In accordance with the present invention, a closed... | 05/29/2007 |
| 7161757 | Method and apparatus for controlling a disk drive under a power loss condition A method for controlling a motorized data-storage device, including extracting energy from a spindle motor to drive a positioning motor of the data-storage device and other components, such as circuitry. In normal operation of one embodiment, a disk is rotated at a ... | 01/09/2007 |
| 7129669 | Motor controller, semiconductor integrated circuit, indicating instrument and method for controlling a motor A motor controller comprising, a detector configured to perform a difference processing for information relating to a counter electromotive force and an induced electromotive force generated by a stepping motor, and to generate a driving control signal based on a re... | 10/31/2006 |
| 7122982 | DC motor rotation information detecting device A rotation information detection device detects rotation information of a DC motor based on a surge component waveform superimposed on a voltage waveform between the terminals of the DC motor or a current waveform of the DC motor, a circuit is provided which supplie... | 10/17/2006 |
| 7079350 | Circuit and method for controlling the parking and unparking of a read-write head A control circuit controls a motor assembly having a coil and a movable arm. The control circuit includes a drive circuit that is coupled to the coil and that generates a drive signal in response to a control signal and a speed signal. The control circuit also inclu... | 07/18/2006 |
| 7075257 | Method and device for braking a motor A method and apparatus for braking a motor has a braking circuit that intermittently shorts the windings of the motor to brake the motor. The braking circuit is powered by back EMF generated by the motor when power is disconnected from the motor. ... | 07/11/2006 |
| 7071645 | Braking device for an electric motor, electrical apparatus provided with the braking device, and a method of braking A braking device for an electric motor of a power tool has a short circuit switch for short circuiting an armature winding of the electric motor during a braking process, the short circuit switch for controlling its switch condition having a control input, a control... | 07/04/2006 |
| 7068007 | Stepping motor driving system and stepping motor driving process A stepping motor driving system and process according to the present invention controls a switching element in such a manner that motor supply current is passed through a motor coil until a coil current detection value reaches an upper limit set point, motor reflux ... | 06/27/2006 |
| 7042177 | Method and system for electronic braking of an electric motor having no permanent magnets System for braking either linear or rotary electric motor having no permanent magnets comprising at least one servo amplifier and an electronic circuit for generating a pulsed control signal for controlling the braking of the motor. The electronic circuit of the pre... | 05/09/2006 |
| 7033127 | Powered, folding ramp for minivan A drive mechanism under the floor of a minivan is coupled to the folding ramp by a rotating arm linkage, also located beneath the floor. The extension of the folding ramp is partially controlled by dynamic braking, i.e. using the electric motor as a generator and co... | 04/25/2006 |
| 7023157 | Stepping motor drive device and method The reference signal generation unit 110a integrates, in the integration circuit 3, a staircase signal generated by the staircase generation unit 2, and thereby generates a reference signal VCTA whose signal level changes continuously ove... | 04/04/2006 |
| 7014000 | Braking apparatus for a patient support A patient support including a propulsion device for moving the patient support. An automatic braking system is provided to selectively brake the patient support. ... | 03/21/2006 |
| 7005817 | Energy conserving disc drive A disc drive includes a disc mounted to a rotatable spindle, a motor coupled to the spindle, and motor control circuitry. The motor has a motoring mode in which it rotates the spindle and a braking mode in which is decelerates the rotating spindle and generates powe... | 02/28/2006 |
| 6977794 | Asymmetric seek velocity profile to improve power failure reliability for rigid disk drive with ramp A disk drive having a control system which adjusts seek velocity profiles is disclosed. The seek velocity profile is adjusted based on the direction of the seek and the location of the target track. If the seek is away from the ramp, the seek velocity profile is not... | 12/20/2005 |
| 6937429 | Magnetic disk storage apparatus and method for controlling magnetic disk storage apparatus In a magnetic disk storage apparatus, when power supply is stopped, a magnetic head can be retracted safely and quickly so as not to be damaged. There are provided a back electromotive a force detector that detects back electromotive forces developed in coils of a v... | 08/30/2005 |
| 6930869 | OR-diode inductive load spike suppressor The present invention is a method and system for preventing voltage spike feedback with switched inductive loads connected to isolated redundant power supplies. A voltage clamp circuit of the present invention may clamp the voltage spikes caused by inductive loads w... | 08/16/2005 |
| 6924612 | Three-wire reversing system A three-wire reversing system for a permanent magnet, reversible, brush-type, direct current (DC) motor has a three-wire alternating current (AC) input voltage source which supplies electrical current to at least one capacitive element. This capacitive element and t... | 08/02/2005 |
| 6924956 | Head loading/unloading control system for use in disk drive apparatus A method for controlling head loading/unloading operations in a magnetic disk drive apparatus that can perform a head retracting operation by using a reserve power source in order to retract head elements to a predetermined rest position even when a primary power so... | 08/02/2005 |
| 6919702 | Systems and methods for passivation of servo motors Servo motor controls are disclosed for passivation in the event of failures with at least two independent control paths and validation of positional information. A sensor assembly generates signals indicative of the position of the motor rotor, and a signal validati... | 07/19/2005 |
| 6867561 | Electrical machine An electrical machine comprises a rotor without windings, a stator having an armature winding 24, 25 and a field winding 10 for generating a magnetomotive force in a direction extending transversely of the magnetomotive force generated by the armature ... | 03/15/2005 |
| 6812663 | Electric drive system including a stepper motor A vehicle drive assembly includes an electric motor directly coupled to a rotatable member for driving a wheel, for example, without gear reduction assemblies between the motor output and the driven wheels. A multi-phase, high pulse current stepper motor is used as ... | 11/02/2004 |
| 6316898 | Pulse modulated capacitive retract device for a voice coil actuator A capacitor powered electronic emergency device retracts and parks an actuator into a resistive parking position with a crash stop barrier. Due to variations of the kinetic status of the actuator at the begin of the retraction, the actuator reaches the re... | 11/13/2001 |
| 6140784 | Power off velocity control for disk drives A method and circuit for controlling a voice coil motor (VCM) for a disk drive actuator assembly such that the actuator assembly moves to a landing area at a constant velocity when the disk drive loses power. The circuit includes a sense amplifier for sen... | 10/31/2000 |
| 6094023 | Method and device for braking an all-mains motor A method and a device for electrical braking of an all-mains motor by which disconnection of supplied feed current to the motor causes an electric switching operation, whereby electric current arranged to cause a reversed rotary direction for the rotor (1... | 07/25/2000 |
| 6084377 | Voltage vector overmodulation technique considering counter electromotive force of motor A voltage vector overmodulation technique considering a counter electromotive force of a motor with respect to a voltage applied to the motor in a transient state during the operation of the motor, selects a voltage having the least logarithmic difference... | 07/04/2000 |
| 6078156 | Method and apparatus for improved electronic braking of a DC motor The present invention provides efficient dynamic braking of a DC motor to complement servo loop control. This invention uses a combined technique where, first, a reversed-torque signal is applied to a standard motor controller that then reverses armature ... | 06/20/2000 |
| 6005359 | Power down brake latch circuit for a brushless DC motor A power down brake latch circuit for dynamically braking a spindle motor in a disk drive system is disclosed. The power down brake latch circuit includes a reservoir capacitor, a smoothing capacitor, a timing circuit, and a logic circuit. The timing circu... | 12/21/1999 |
| 5898282 | Control system for a hybrid vehicle A control system for a hybrid vehicle ensures the best possible utilization of onboard energy resources for different operating conditions of the vehicle. The control system utilizes a strategy modified in real time depending on the input from sensors mea... | 04/27/1999 |
| 5838124 | Systems and methods for braking of actuator and brushless DC motor therein A brushless DC motor is controlled by determining a speed of the motor and a line voltage supplying drivers of the motor. Based upon these determined values and predetermined motor performance data, a maximum PWM on-time is determined for drive signals su... | 11/17/1998 |
| 5821717 | Method and circuit for driving a hard disk drive spindle motor A system for driving a hard disk drive spindle motor is disclosed. The system comprises a spindle motor control circuit (120) and a spindle motor power circuit (220). The system also includes at least one disk (22) attached to a rotatable spindle (21) and... | 10/13/1998 |
| 5659231 | Brake for DC brushless motor The present invention provides for electronic braking of DC brushless motors by developing a feedback signal based on the back EMF of the motor. This feedback signal is used to provide a signal to the motor permitting current flow from the motor into the ... | 08/19/1997 |
