Door operation control apparatus
US4475069A · kind A · utility
14Cited by
4References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 4, 1981 |
| Grant date | Oct 2, 1984 |
| Priority date | — |
| Expiry date | Dec 4, 2001 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE05Y2900/106
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A motor driving a garage door is controlled by a controller, and the rotation of the motor in the normal and reverse directions is normally controlled in response to an actuating signal applied to the controller from a main push button switch. In a specific-mode in which an actuating signal is applied to the controller from an emergency push button switch, a mat switch or a fire sensor, the latter signal has priority over the former signal, and the motor is driven to move the garage door to its full-open position.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.