Process for monitoring a driven, movable door or the like
US4625291A · kind A · utility
53Cited by
7References
47Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Sep 9, 1983 |
| Grant date | Nov 25, 1986 |
| Priority date | — |
| Expiry date | Sep 9, 2003 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02H7/0851
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A process for controlling the movement of a motorized door is disclosed. Also, a control apparatus that has a close loop feedback system for use in controlling a motorized door is disclosed. The invention provides for improved safety by incorporating improved obstacle sensing thresholds through the use of a comparator system.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.