Keyless entry system for automotive vehicle with power consumption saving feature
US4688036A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 28, 1984 |
| Grant date | Aug 18, 1987 |
| Priority date | — |
| Expiry date | Nov 28, 2004 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T70/5978
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A keyless entry system for an automotive vehicle allows operation of a vehicle device or devices without the need for an ignition key or other mechanical keys. A user can simply depress a single push-button or operate another suitable type of switch to activate the system and operate the desired vehicle device to the desired position. The system generally comprises a pocket-portable radio signal transmitter and a controller mounted on the vehicle and associated with the vehicle device. The transmitter has a small, long-life battery and the controller receives electric power from the vehicle battery. Power conservation for both the transmitter and the controller is achieved by activating them for limited periods in response to operation of the manual switch.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.