Covering for an architectural opening including multiple stage spring assembly
US10435945B2 · kind B2 · utility
5Cited by
33References
24Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 10, 2015 |
| Grant date | Oct 8, 2019 |
| Priority date | — |
| Expiry date | May 16, 2037 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE06B2009/405
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A covering for an architectural covering is provided. The covering may include a multiple stage spring assembly. The spring assembly may include a non-rotatable first member, a first spring including a first end portion and a second end portion, and a second spring including a first end portion and a second end portion. The first end portion of the first spring may be coupled to the first member. The first end portion of the second spring may be coupled to the second end portion of the first spring to rotate with the second end portion of the first spring.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.