Circuit for timed position control of device driven by a DC motor
US6252363A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | May 28, 1999 |
| Grant date | Jun 26, 2001 |
| Priority date | — |
| Expiry date | May 28, 2019 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60R1/07
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
The present invention relates to an electronic circuit that interrupts the application of electrical power to a motor after a predetermined period of time. The electronic circuit is disposed between a motor which drives a device from an initial position to a final position and a switch movable from a first position to a second position. A battery which supplies the electrical power for the motor is engaged with the switch. The control circuit includes at least two energy storage devices. Depending on the position of the switch, one of the energy storage devices will be fully charged by the battery source. Altering the position of the switch will cause the fully charged energy storage device to begin its discharge and the alternate energy storage device will be "instantly" charged. During the time that both energy storage devices have a significant charge on them, a control signal is generated. The control signal will be present until the discharging energy storage device falls below a threshold value. In response to the control signal, the electrical power source is applied to the motor and the motor will turn in the direction according to the polarity of the applied power source. …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.