Balloon for lighted sign comprising an inflatable envelope with self-regulated internal pressure
US6966676B2 · kind B2 · utility
27Cited by
4References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 21, 2003 |
| Grant date | Nov 22, 2005 |
| Priority date | — |
| Expiry date | Feb 18, 2024 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF21V3/023
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A balloon includes an envelope inflatable by a gas, in particular air, an anemometer for detection of the wind speed outside the envelope, and a control circuit to control a fan so as to make the internal inflation pressure of the envelope vary according to the wind speed. The upper part of the mast passes vertically through the envelope to give the latter a static rigidity at the level of the diametrically opposed bottom pole and top pole. The mast is hollow and includes at least one air outlet orifice in its upper part to perform inflation of the envelope.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.