Collapsible umbrella with reinforced rib structure
US5975099A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 9, 1997 |
| Grant date | Nov 2, 1999 |
| Priority date | — |
| Expiry date | Oct 9, 2017 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA45B25/22
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
A foldable umbrella includes a post; a stationary hub secured to an upper end of the post; a canopy centrally secured to the stationary hub; a sleeve slidably mounted on the post; a plurality of radially oriented ribs secured to the canopy in equiangularly spaced relation, each rib having a radially inner end and a radially outward end; a plurality of foldable strut assemblies, each strut assembly connected between the sleeve and a respective one of the ribs, each strut assembly including a first strut having one end pivotally connected at a first pivot point to the sleeve and a second end pivotally connected to a respective one of the ribs at a second pivot point spaced radially outwardly from the radially inner end of the rib, a second strut having one end pivotally connected at a third pivot point to the stationary hub and a second end pivotally connected at a fourth pivot point to an intermediate point of the first strut, and a third strut having one end pivotally connected at a fifth pivot point to an intermediate point of the second strut and a second end pivotally connected at a sixth pivot point to the respective one of the ribs, the sixth pivot point being positioned radia…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.