Stick umbrella with reinforced frame
US6715504B2 · kind B2 · utility
Inventor
Key dates
| Filing date | Jun 11, 2002 |
| Grant date | Apr 6, 2004 |
| Priority date | — |
| Expiry date | Jun 11, 2022 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA45B2019/001
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
The present invention relates to a stick type umbrella with reinforced frame including a shaft, which connects with a frame having several sets, such as six sets or eight sets, of main ribs and stretchers. The frame is to provide with two different rib-set structures alternately on the frame. One set is to provide a cord between a middle position of the stretcher and an outer position of the main rib, and the other set is to provide a movable joint at the outer end of the stretcher positioned on the relative main rib between two fixed rings. As the cord pulls the main rib tight and the movable joint functions on the main rib to release wind pressure, the stick type umbrella with the present invention can be quite useful and is capable of avoiding breakage.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.