Automatic tightening device with rolling and unrolling control functions
US10086744B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 31, 2016 |
| Grant date | Oct 2, 2018 |
| Priority date | — |
| Expiry date | Oct 31, 2036 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60P7/083
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
Provided is an automatic tightening device with rolling and unrolling control functions. A handle, a base, and a spool are pivotally connected together by a reel having an associated relationship with the spool and provided with a coil spring driving structure at an end. The handle and the base each has two parallel sidewalls. A movable pawl/stop pawl is mounted between the sidewalls of the handle/base. The two pawls can be in contact with any tooth around ratchet wheel sheets. A no-load webbing unrolling-rolling-stopping region, a safe lock position, a tightening operation region, and a load releasing region are provided at an edge of the base. The no-load webbing unrolling-rolling-stopping regions at the edges of the base are inclined surfaces, end surfaces of the stop and movable pawls are chamfers, and a no-load releasing cam rim and a load releasing cam rim are provided at an edge of the handle.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.