Presence detector for a door assembly
US8510990B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 26, 2009 |
| Grant date | Aug 20, 2013 |
| Priority date | — |
| Expiry date | Jul 18, 2029 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE05Y2900/104
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A presence detector for a door assembly which includes a door closing a door entrance is described herein. The detector includes a transducer assembly mounted to the door assembly for emitting at least one ultrasound detecting beam adjacent the door entrance and for triggering a detecting signal indicative of a body located adjacent the door entrance when the body intersects the at least one ultrasound detecting beam and a controller for receiving information indicative of a position of the door and for controlling the emission of the at least one detecting beam accordingly with the position of the door. The detector assembly operates in crossing, ranging or dual modes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.