Garden umbrella with upper and lower support ribs
US5836328A · kind A · utility
24Cited by
8References
5Claims
0Family size
Inventor
Key dates
| Filing date | Mar 25, 1998 |
| Grant date | Nov 17, 1998 |
| Priority date | — |
| Expiry date | Mar 25, 2018 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA45B2025/146
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
A garden umbrella includes upper and lower support ribs, a runner sleeved slidably on a pole, stretchers, and connecting rods pivotally interconnecting upper and lower support ribs. Each stretcher has one end pivotally attached to a runner and an opposite end pivotally attached to the corresponding upper and lower support ribs. As such, the pivotal attachments described above constitute a pantograph structure, thereby facilitating convenient stretching and collapsing operations.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.