Automatic door object sensing system
US4577437A · kind A · utility
34Cited by
6References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 26, 1984 |
| Grant date | Mar 25, 1986 |
| Priority date | — |
| Expiry date | Nov 26, 2004 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE05Y2900/132
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
Mechanism for automatic swing doors including three motion detectors, two associated with the approach side of the door and one on the swing side of the door, with the detectors on the approach side effective, when activated, to open the door and the detector on the swing side effective, when activated, to slow down the moving door.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.