Spring assist system for a canopy frame
US10273711B2 · kind B2 · utility
7Cited by
10References
26Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jan 8, 2018 |
| Grant date | Apr 30, 2019 |
| Priority date | — |
| Expiry date | Jan 8, 2038 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE04H15/48
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A spring assist system for a canopy frame. The system including an extension spring, an upper center cap, and a lower center cap. One end of the extension spring is coupled to the upper center cap and the other end is coupled to the lower center cap. A force of the extension spring draws, in an axial direction, the lower center cap toward the upper center cap to decrease a length of the extension spring.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.