Barrier
US6761205B1 · kind B1 · utility
Inventor
Key dates
| Filing date | Feb 15, 2002 |
| Grant date | Jul 13, 2004 |
| Priority date | — |
| Expiry date | Feb 15, 2022 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE06B11/00
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A flow device for location within an aperture (A) to regulate flow through the aperture on a path from a first location (5) on one side of the aperture to a second location (6) on the other side of the aperture wherein there is provided a barrier (1) defined by a sequence of vertical elements; device for driving the sequence of elements, so that the barrier serves to generate a predetermined wave form along the path such that the barrier serves to create in sequence: an entry region for occupation by at least one individual which entry region is initially open toward the one side of the aperture but isolated from the other side of the aperture; a traversing region (R) on the path generated from the entry region by progressive movement of the barrier, and an exit region open towards the other side of the aperture but isolated form the one side.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.