Telescopic tube of upper beam of vertical type venetian blind
US6945301B1 · kind B1 · utility
Inventor
Key dates
| Filing date | Feb 17, 2004 |
| Grant date | Sep 20, 2005 |
| Priority date | — |
| Expiry date | Feb 17, 2024 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE06B9/368
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A telescopic tube of an upper beam of a vertical type Venetian blind includes a major/minor telescopic upper beam, two rows of sliding clamp blocks, two linkage actuated members, and two guide straps wherein the major/minor telescopic upper beam has opposite grooved guide tracks symmetrically extending inwards at the open bottom side thereon for the guide straps to be adapted therein, and the sliding clamp blocks are serially linked via X-shaped linking bars each pivotally joined to the others in linkage connection. The linkage actuated member, inverted U-shaped, is precisely bridged at the opposite grooved guide tracks thereon. When the two rows of the sliding clamp blocks are activated by the X-shaped linking bars, clamping parts of the sliding clamp blocks disposed at the front section of each row thereof are sequentially displayed at a movement slot of the linkage actuated member therein till a clamping part located at a retaining hole of an adjustment block therein is pulled to activate the linkage actuated member moving smoothly forwards therewith along the guide straps at the grooved guide tracks therein. Thus, pulling force is synchronically formed at both the front and mid…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.