Electropneumatic door control system
US4827415A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 15, 1983 |
| Grant date | May 2, 1989 |
| Priority date | — |
| Expiry date | Feb 15, 2003 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02H7/093
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
An electropneumatic door control, particularly for the control of doors in public transportation, which includes for the purpose of detecting the respective position of the door linear motion sensors (1, 2) which are mounted on the pneumatic door cylinders (4, 5) or on the axes of rotation of the door wings, and whose output signals are evaluated by electronics (3). The electronics (3) include a computer which automatically detects the end positions as well as the motion behavior of the door or obstructions, respectively, and triggers a monitoring function, if necessary. The proposed door control increases reliability and eliminates previously used limit switches and electropneumatic differential pressure switches.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.