Automatic assist for swing-door operator
US4952080A · kind A · utility
82Cited by
10References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 12, 1989 |
| Grant date | Aug 28, 1990 |
| Priority date | — |
| Expiry date | May 12, 2009 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S388/921
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A manual power assist control employs a magnetic encoder which is mounted to a shaft of the door operator. The encoder generates pulse trains which are indicative of an attempt to open the door in a given direction. The pulses are processed to generate a signal for opening the doors in the event a manual attempt to open the doors is detected.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.