Portable screen assembly and expanding and contracting column and handing tool used therefor
US8159745B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 24, 2009 |
| Grant date | Apr 17, 2012 |
| Priority date | — |
| Expiry date | Apr 24, 2029 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03B21/58
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A portable screen assembly is small, light and easy to handle and enables easy extension and contraction of a column stretching a screen. The column has at least a first cylindrical body, a second cylindrical body, and a third cylindrical body, wherein the first cylindrical body slides within the second cylindrical body and the second cylindrical body slides within the third cylindrical body. The column also includes a first lock portion locking slide of the first cylindrical body, a second lock portion locking slide of the second cylindrical body, a lock release lever provided at an upper end portion of the first cylindrical body, and a release bar having an upper end portion pivotally connected to the lock release lever so as to be movable vertically within the first cylindrical body.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.