Inflatable and deflatable sign support
US5402591A · kind A · utility
19Cited by
16References
21Claims
0Family size
Inventor
Key dates
| Filing date | Jan 11, 1993 |
| Grant date | Apr 4, 1995 |
| Priority date | — |
| Expiry date | Jan 11, 2013 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09F15/0025
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An inflatable and deflatable support for a sign having advertising indicia thereon including an air inflatable, cylindrical member having an upper, inflatable, cylindrical cross member spanning a pair of upstanding inflatable legs which depend from opposite ends thereof. The legs are each open at the lower end and are sealed to a hollow cylindrical ballast plug. Mechanism is coupled to one of the legs and cylinders for admitting air under pressure to the cylindrical ballast plug to inflate and deflate the cylinder.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.