Pocketed spring assembly
US9370252B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 19, 2014 |
| Grant date | Jun 21, 2016 |
| Priority date | — |
| Expiry date | Jun 19, 2034 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA47C27/062
- WIPO fieldFurniture, games
- WIPO sectorOther fields
Abstract
A pocketed spring assembly comprises a plurality of parallel strings of springs, each string joined to an adjacent string, each string comprising first and second opposed plies of fabric and a plurality of pockets formed along a length of the string by transverse seams joining the first and second plies. At least one spring is positioned in each pocket. An upper end of each transverse seam is below the upper surface of the string so as to partially separate adjacent pockets within a string of springs. Each spring has two end portions and a middle portion. The convolutions of the middle portion are greater in diameter and pitch than the convolutions of the end portions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.