Did You Know...
...that the x-ray was discovered purely by accident? When German physicist Wilhelm Konrad von Roentgen was experimenting with cathode rays in 1895, he put an activated Crookes tube in a book and went out to lunch. When he returned, he discovered that a key that had also been placed in the book showed up as an image on the developed film!
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 |
| 5819187 | Electric vehicle propulsion system and batteries therefor An initial output of a secondary battery on an electrically propelled vehicle is set to a value which is at least the sum of an established power output of a motor, an output reduction due to the memory effect of the secondary battery, and an allowable ou... | 10/06/1998 |
| 5819189 | Control system for a monorail vehicle A monorail vehicle used for material handling purposes comprises a number of cars which run on a track. The cars are linked together in one or more trains and each train has a master car and several slave cars. An embedded computer in the master car keeps... | 10/06/1998 |
| 5815824 | Navigation system for electric automobile A navigation system suitable for use in an electric automobile, especially hybrid electric automobiles, easily and properly controls charging state of a battery in the electric automobile while making use of characteristic features of the navigation syste... | 09/29/1998 |
| 5799262 | Constant speed control system for electric vehicle and the method thereof Disclosed is a system and method for controlling a vehicle speed of an electric vehicle so as to be operated at a designated constant vehicle speed. When the constant speed running mode is selected and the vehicle speed is designated to a given vehicle sp... | 08/25/1998 |
| 5790976 | Route selection apparatus for a motor vehicle A route finder device for a motor vehicle contains a data input unit for inputting one or more destinations for a journey, a road network memory for storing the locations on the network of roads which can be used by the vehicle, a computer unit for determ... | 08/04/1998 |
| 5778326 | Hybrid vehicle with battery charge control relative to a driving route A hybrid vehicle capable of efficiently regenerating a battery when the driving route is previously defined and of decreasing exhaust gases. A controller calculates a battery stored residual charge from the output of a battery current voltage detection se... | 07/07/1998 |
| 5771475 | Traveling control apparatus for electric vehicles A control apparatus by which a duty ratio in consideration of how energy stored in storage cells is consumed is set to ensure a steady traveling feeling, a regeneration brake which can produce stable braking forces regardless of how storage cells are cons... | 06/23/1998 |
| 5771476 | Power control system for a fuel cell powered vehicle A power control system for controlling the supply of a reactant gas, such as air, for reaction within a fuel cell stack used to power, for example, a motor vehicle is set forth. The disclosed system may be used to reduce or eliminate compressor revving an... | 06/23/1998 |
| 5734099 | Potential travel distance estimation system for electric automobiles A computer is responsible for information on a running speed of an electric automobile, information on a terminal voltage and a discharge current of a battery, stored data on a total capacity of the battery, and reference data for defining a minimum capac... | 03/31/1998 |
| 5730238 | Control method of electric car By processing in a control processor 71 signal indicating the amount or degree of pushing-down of the accelerator pedal 2a and signals indicating the non pushing down and full pushing-down of the acceleration pedal 2a, the control unit 7 executes the judg... | 03/24/1998 |
| 5726890 | Control apparatus for electric vehicle An electric vehicle control unit capable of position control so that the vehicle can be held in its stop position without vibration, even if an operator does not keep the brake pressed. The control circuit of the electric vehicle comprises a speed/torque ... | 03/10/1998 |
| 5725064 | Hybrid vehicle with pumping loss reducing function A hybrid vehicle having a function for reducing the pumping loss. When the shift is in the reverse position, when an appliance is to be driven while the vehicle is in its stopped state and when the electric motor alone is able to drive the vehicle, the fu... | 03/10/1998 |
| 5697466 | Hybrid vehicle A hybrid vehicle maintains its travel even if the motor driving system used therein suddenly encounters some problem in operation. The hybrid vehicle has an internal combustion engine and an electric motor with its output connected to an output axle. A cl... | 12/16/1997 |
| 5653315 | Automatic damper system An automatic damper system for an automobile which includes a plurality of shock absorbers (10). Each of the shock absorbers (10) having a pressure cylinder (48), a first valve member (100) for establishing the first plurality of flow passages, as well as... | 08/05/1997 |
| 5654887 | Braking force controller for electric vehicle A braking force controller for an electric vehicle properly carries out an anti-lock braking operation by keeping a slip ratio in a stable range. The vehicle has a motor 1 to drive wheels. A central controller 4 calculates regenerative energy according to... | 08/05/1997 |
| 5650931 | Generator output controller for electric vehicle with mounted generator An output memory unit 26a stores data for the necessary average output of a generator 20 for a pattern obtained from the past in-travel-pattern power consumption. Therefore, in the case of a travel pattern, the output of the generator 20 is set in accorda... | 07/22/1997 |
| 5646852 | Method and device for vehicle fuel cell dynamic power control A method and an apparatus are provided for controlling the power of an electric drive unit in a vehicle. The drive unit is supplied with electrical energy by a fuel cell in the vehicle. On the basis of a power request which is determined from the accelera... | 07/08/1997 |
| 5627758 | Vector control board for an electric vehicle propulsion system motor controller A vector control board for an electric vehicle propulsion system motor controller comprising a microcontroller for generating torque requests, a digital signal processor for receiving the torque requests from the microcontroller and for generating phase v... | 05/06/1997 |
| 5619417 | Battery monitoring system for an electric vehicle A battery monitoring system for an electric vehicle is provided in which an individual battery monitor is physically touching and electrically connected to each one of the battery modules in the string of series or parallel connected battery modules. The ... | 04/08/1997 |
| 5610814 | Control apparatus and method for electric vehicles A control apparatus of an electric vehicle for effectively limiting the operation of the vehicle when it is determined that a driver of the electric vehicle is not sitting in the seat and an accelerator opening of the electric vehicle is in a position cor... | 03/11/1997 |
| 5555949 | Electricaly operable wheelchair having a controller responsive to different types of inputs An electrically operable wheelchair includes a pair of support wheels coupled with a pair of drive motors, one of a plurality of different types of user-operable input devices, and a controller responsive to input signals from the input devices for contro... | 09/17/1996 |
| 5539399 | Display device for electric vehicle A display device for an electric vehicle, which display device is capable of displaying a possible running range from a current location of a vehicle with a detected residual battery charge on a road map indicated on the display device screen, considering... | 07/23/1996 |
| 5534764 | Vehicle driving control system having function for suppressing vibration A vehicle control system for driving an electric vehicle having driving force generating means for driving the vehicle, accumulating means for accumulating driving energy for said vehicle, means for supplying the energy of said accumulating means to said ... | 07/09/1996 |
| 5532671 | Method and apparatus for informing a driver of the propulsive capability of a vehicle powertrain The accelerator command signal from an accelerator pedal sensor of an electric vehicle is mapped to a generally lower value in view of a reduced state of charge of the traction battery of the vehicle. The mapping requires the driver of the vehicle to depr... | 07/02/1996 |
| 5508924 | Driving force controller for an electric vehicle with electric motors provided for all driving wheels individually A driving force controller for an electric vehicle calculates the optimal driving force of each driving wheel based on a formula in response to the detected wheel acceleration and the difference between the wheel speed and the vehicle speed, or alternativ... | 04/16/1996 |
| 5498216 | Drive arrangement for an electric motor vehicle and process for shifting gears A drive arrangement for an electric motor vehicle comprises an electric motor, a control rectifier which is connected to and controls the output of the electric motor, a gear box having at least first and second gears, and first and second positively enga... | 03/12/1996 |
| 5492192 | Electric vehicle with traction control A vehicle traction control system comprising an electric motor and drive system for an electric vehicle, at least one driven wheel mechanically connected to the electric motor and drive system, at least one non-driven wheel, and a controller coupled to th... | 02/20/1996 |
| 5485375 | Protecting device of electromobile An electromobile includes a control device which, receiving as inputs a speed command signal outputted from an accelerator sensor and a present motor speed signal outputted from an encoder, calculates a torque command current corresponding to a difference... | 01/16/1996 |
| 5471384 | Electromobile An electromobile includes a motor; an output torque cutting commanding circuit for commanding the cutting of the output torque of the motor responsive to detection of a predetermined condition; and output torque command calculator for calculating an outpu... | 11/28/1995 |
| 5467275 | Control apparatus for electric vehicle An electric vehicle control unit capable of position control so that the vehicle can be held in its stop position without vibration, even if an operator does not keep the brake pressed. The control circuit of the electric vehicle comprises a speed/torque ... | 11/14/1995 |
| 5453930 | Drive system for electric automobiles A wheel motor drive system for electric automobiles comprises a car battery mounted on a vehicle body, at least two electric motors connected to vehicle wheels independently of each other, each of the motors having inherent torque characteristics with reg... | 09/26/1995 |
| 5450324 | Electric vehicle regenerative antiskid braking and traction control system An antiskid braking and traction control system for an electric or hybrid vehicle having a regenerative braking system operatively connected to an electric traction motor, and a separate hydraulic braking system includes one or more sensors for monitoring... | 09/12/1995 |
| 5446351 | False-creep generating device for electric vehicles A false-creep generator device for an electric vehicle equipped with a transmission controls an electric motor to cause the electric vehicle to creep when the accelerator pedal of the electric vehicle is not depressed, no brake is applied to the electric ... | 08/29/1995 |
| 5432416 | Driving apparatus for robot A self-propelled robot has a robot body on which a drive wheel is mounted. The drive wheel is connected to a member that can be turned about a vertical axis for steering the robot. A propulsion drive mechanism is mounted on that member for transmitting a ... | 07/11/1995 |
| 5376868 | Driving force controller for electric motor vehicle A driving force controller for an electric motor vehicle which suppresses changes in behavior of a vehicle when a right or left driving wheel experiences trouble and detects vehicle conditions to independently control the driving force of each wheel so as... | 12/27/1994 |
| 5376869 | Electric vehicle drive train with rollback detection and compensation An electric vehicle drive train includes a controller for detecting and compensating for vehicle rollback, as when the vehicle is started upward on an incline. The vehicle includes an electric motor rotatable in opposite directions corresponding to opposi... | 12/27/1994 |
| 5367455 | Running performance control apparatus and method for an electric vehicle A running performance control apparatus suitable for use in an electric vehicle, which is capable of restricting the running performance of the vehicle when the capacity of a battery of the vehicle is reduced to the preset residual capacity. The battery c... | 11/22/1994 |
| 5365431 | Control of electric vehicle motors responsive to detected vehicle speed and required total driving force An electric motor vehicle having a plurality of motors mounted thereon as a driving force source includes a detector for detecting the vehicle speed; a detector for detecting the load applied to the wheels; a calculating device for selecting a detected va... | 11/15/1994 |
| 5318142 | Hybrid drive system A hybrid drive system for use in an electric vehicle comprising an electric motor generator for moving the vehicle, plural electrical energy sources in electric contact with electric motor/generator and a control source in electrical contact with the plur... | 06/07/1994 |
| 5176213 | Driving force distribution system for hybrid vehicles In a hybrid vehicle in which the front or rear set of wheels is driven by an engine (7) and the other set of wheels is driven by a motor (8), a traveling mode deciding unit (4) is provided with a table for deciding engine throttle opening and motor output... | 01/05/1993 |
