Chair footrest ring positioning structure
US9835191B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Dec 2, 2016 |
| Grant date | Dec 5, 2017 |
| Priority date | — |
| Expiry date | Dec 2, 2036 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA47C7/004
- WIPO fieldFurniture, games
- WIPO sectorOther fields
Abstract
A chair footrest ring positioning structure includes a guide region tilting downward and concavely disposed on an outer surface of any one side of the lower segment of the tightening case, one or more anti-slip pads fixed inside an internal space of the tightening case, one or more grooves concavely disposed at a periphery of the tightening case, to facilitate insertion of a middle pipe of the chair, and a sleeve corresponding in shape to the middle of the footrest ring fitted around the tightening case. One or more bumps extending from an inner side of the sleeve are inserted into the grooves of the tightening case, respectively. When the middle pipe is rotated to move the tightening case by a predetermined distance, the guide region undergoes a displacement to drive insertion of the bumps, thereby pushing the tightening case inward.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.