Nonrotating billboard of rotation body
US6568110B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 29, 2002 |
| Grant date | May 27, 2003 |
| Priority date | — |
| Expiry date | Jan 29, 2022 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09F21/045
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
The present invention relates to a nonrotating billboard of a rotation body which is attached on a surface of a rotation center of a vertical rotation member such as vehicle wheel, fan, etc. for showing a nonrotating state of a pattern, emblem or advertisement irrespective of a rotation of a rotation body. The nonrotating billboard includes a housing rotated together with the rotation member, a billboard member having a surface on which a billboard is formed installed in the housing and rotatable relative thereto while maintaining an upright state through use of a weight member. The nonrotating billboard further includes a friction prevention unit for maintaining a free state of the billboard member such that the billboard is restricted from contacting the housing.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.