Famous Patents
3M employee and church chorister Art Fry needed something to temporarily mark pages in his hymnal. He was in luck because his colleague, Spencer Silver, accidentally developed a glue that was too weak for other purposes. After initially discouraging consumer response, Post-it Notes became a hit in 1979.
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 |
| 8390219 | Door operator with electrical back check feature A door operator with an electrical back check feature is disclosed. Embodiments of the present invention are realized by a motorized door operator that electrically creates a back check force for an opening door. The door operator simulates the back check normally c... | 03/05/2013 |
| 8368328 | Method for operating a motorized roller shade The present invention advantageously provides methods for manually and/or remotely controlling a motorized roller shade that includes a shade attached to a shade tube, a DC gear motor disposed within the shade tube and a microcontroller. One method includes detectin... | 02/05/2013 |
| 8344670 | Coupling for a movable furniture part The invention relates to a retraction device for a movable piece of furniture, having a pulling means windable on a roll, and an electric motor is provided for driving the roll. The retraction device also has a coupling for releasably connecting the movable piece of... | 01/01/2013 |
| 8310178 | Motor control apparatus and image forming apparatus A motor control apparatus for controlling a DC motor includes a detection unit configured to detect an angular speed of the DC motor, and a control unit configured to, when the DC motor is accelerated, increase a control value that controls a driving of the DC motor... | 11/13/2012 |
| 8299734 | High efficiency roller shade The present invention advantageously provides a motorized roller shade that includes a shade tube, a motor/controller unit and a power supply unit. The motor/controller unit is disposed within the shade tube, and includes a bearing, rotatably coupled to a support sh... | 10/30/2012 |
| 8154227 | Model train control system A model train control system providing a more realistic modeling of the movement, sound, smoke, and lighting effects of a model train is disclosed. A number of dynamic inputs are used to control such effects. Novel features include providing a dynamic variable speed... | 04/10/2012 |
| 8089228 | Computer activated gas cap An automated gas cap mechanism for opening and closing the fuel tank of a vehicle includes a housing with a filler compartment door mounted on a door support link that is coupled to an axle having first and second ends mounted in slots formed in the housing and conf... | 01/03/2012 |
| 7919941 | Semiconductor power converter A semiconductor power converter includes a power converter for converting direct current to three-phase alternating current or vice versa; a means for detecting a current in an alternating current side of the power converter; a means for providing a current referenc... | 04/05/2011 |
| 7834566 | Generic motor control system A method for controlling the operation of a motor utilizing a generic motor control module. The method includes sampling at least one motor operating criterion during operation of the motor and executing a generic control algorithm at a predetermined periodic interv... | 11/16/2010 |
| 7701156 | Electric motor drive control system and control method thereof A voltage command value of a converter is set by executing the step of determining a candidate voltage of a system voltage VH as a converter output voltage in a voltage range from the minimum necessary voltage corresponding to induction voltage of a motor generator ... | 04/20/2010 |
| 7550936 | Fan motor drive control apparatus A fan motor drive control apparatus comprises a plurality of drive circuits for driving respectively a plurality of fan motors, and a speed change-over control circuit for transmitting a control signal for changing over speeds of the fan motors, to the plurality of ... | 06/23/2009 |
| 7378810 | Method and apparatus for spindle motor control Information indicative of the placement of spindle motor components may be obtained and used to provide a correction to one or more BEMF-derived attributes used to control the spindle speed. In some implementations, first and second signals indicative of BEMF of dif... | 05/27/2008 |
| 7362065 | Regenerative breaking system for electric vehicle Several embodiments of electric vehicle control and control apparatus wherein the amount of regenerative braking of the vehicle and the type of braking is determined by current conditions to provide simpler and more effective control regardless of condition of the p... | 04/22/2008 |
| 7330010 | Method for operating a rotating electrical machine and apparatus for carrying out the method A method is specified for operating a rotating electrical machine (1), which machine (1) has at least two sets of stator windings (A, B), in each case one associated converter unit (2) being provided for each set of stator windings (A, B) and ea... | 02/12/2008 |
| 7242175 | Determining rotation of a freewheeling motor A device and method that determine a freewheeling rotation of an electric motor. The method includes steps of measuring first and second signals from respective first and second windings of an unenergized motor, and determining from the first and second signals whet... | 07/10/2007 |
| 7202624 | Self calibrating fan A self-calibrating, continuous variable speed fan for use in cooling electronic circuitry is disclosed. Upon initial power-up, in an environment of known temperature, the self-calibrating fan accommodates for the tolerances of its electronic components by reading a ... | 04/10/2007 |
| 7157871 | Intermittent drive control apparatus of motor Rotation of a capstan motor is detected by a frequency detector, and supplied to a CPU as a rotation detection signal CFG. The CPU derives a period of the rotation detection signal CFG, calculates an average rotational speed of the capstan motor on the basis of the ... | 01/02/2007 |
| 7102309 | Apparatus for compensating for speed error of motor The present invention discloses an apparatus for compensating for a speed error of a motor which can reduce a speed ripple of the motor resulting from load characteristics, and which also can reduce vibrations and noises. The apparatus for compensating for the speed... | 09/05/2006 |
| 7102303 | Generic motor control system and method A method for controlling the operation of a motor utilizing a universal motor control module. The method includes sampling at least one motor operating criterion during operation of the motor and executing a universal control algorithm at a predetermined periodic in... | 09/05/2006 |
| 7095195 | Motor and disk drive apparatus In a motor and a disk drive apparatus in accordance with the present invention, a position detecting part 30 comprises a detection signal switching circuit 39A, a noise elimination circuit 38 and a detection circuit 39B, and the detection... | 08/22/2006 |
| 7075266 | Apparatus for controlling an a. c. motor A method controls a torque of an a. c. motor which does not cause a shortage of torque by using an economical current detection which estimates d- and q-axis currents Idc, Iqc from d. c. current IDC flowing through an input d. c. bus line of a power converter. A val... | 07/11/2006 |
| 6989650 | AC motor control system using parallel integrated sub systems A control system for a polyphase AC motor having a predetermined horsepower rating is provided comprising a plurality of integrated control systems each rated at less than the hoursepower rating for the motor and having a rectifier section, an inverter section, and ... | 01/24/2006 |
| 6979976 | Driving apparatus for driving a brushless motor A driving system for driving a brushless motor effects a rotation control of a rotor by sequentially switching application of a current to magnetic coils disposed in a stator in response to a detection signal from a pole-position detector. The driving system compris... | 12/27/2005 |
| 6952057 | Controller of vehicle A controller of a vehicle for igniting, i.e., starting-up an engine on the basis of a load condition. When a starting condition judging device judges that the vehicle is advanced, i.e., starts moving, during an idle stop, an engine water temperature detector and a l... | 10/04/2005 |
| 6946810 | Windscreen wiper system comprising two opposed wipers The invention relates to a windshield wiper system with two wipers (1, 2) that travel in opposite directions and can each be driven by a separate motor (MFS, MBS), wherein a regulating unit (7) is provided for triggering the motor... | 09/20/2005 |
| 6782759 | Anti-entrapment system An anti-entrapment system for preventing an object from being entrapped by a translating device includes a capacitance sensor positioned adjacent to the translating device. The sensor has first and second flexible conductors separated by a separation distance. The c... | 08/31/2004 |
| 6492741 | Motor control apparatus combined to engine A motor control apparatus is combined with an internal combustion engine and an electric motor to form a vehicle-propelling system. The motor is connected to a crank shaft of the engine and has both driving and power-generating functions. The motor contro... | 12/10/2002 |
| 5327054 | Controlling electronically commutated motor An electronically commutated motor is controlled by controlling the winding current of the motor. During an operational mode change of the motor, the winding current is first changed to a value in excess of the value needed to maintain a measured motor pa... | 07/05/1994 |
| 5245257 | Control system A plant controller calculates the updated value of a control parameter for a motor controller for controlling motors for driving process machines in accordance with the change in the operational condition of a process plant so as to transmit it to the mot... | 09/14/1993 |
| 5130617 | Inverter control device for driving an elevator An inverter control device for controlling an induction motor that drives elevators, has two induction motor coils that are electrically separate with inverters connected to each coil, and a control device that controls these two inverters with the same c... | 07/14/1992 |
| 4406979 | Fail-safe system for pulse-controlled three-terminal d.c. motor A pulse control circuit for a d.c. series motor having an armature and two oppositely-wound field windings, comprises a contactor in series with the motor, two main thyristors each connected in series with the armature and a respective one of the field wi... | 09/27/1983 |
| 4396876 | Motor control apparatus A motor control apparatus which includes a pulse generator for providing a first signal for specifying the operational condition of a motor, and a motor driver for providing a second signal for driving the motor when the first signal is at a first level a... | 08/02/1983 |
| 4388570 | Digitally controlled pulse width modulated motor speed control for servo positioning systems A digitally controlled pulse width modulated control system for a servo device is disclosed wherein the control transistors (46, 48, 50, 52) can be operated directly from the incoming voltage source. The system converts the input or feedback signal into d... | 06/14/1983 |
| 4384240 | Regenerative braking system for three-terminal d.c. motor A pulse control circuit for a three-terminal d.c. series motor having an armature and two oppositely-wound field windings comprises a respective main thyristor in series with each field winding, one or other of the main thyristors being operated at a vari... | 05/17/1983 |
| 4234832 | On-line switching between two control parameters A control method and circuit providing smooth transition between two regulating modes involving two regulating parameters, one active and one inactive. The method comprises the steps of providing a reference signal and developing a signal representing the... | 11/18/1980 |
| 4025830 | Motor control and web material drive system A motor switching and control circuit is disclosed in which the direction of transport of web material transferred between two reels is reversed by detecting a condition requiring reversal, generating a reversing signal in response to the detected conditi... | 05/24/1977 |
