Opening-closing device
US10933513B2 · kind B2 · utility
Assignees
Inventor
Key dates
| Filing date | Mar 9, 2017 |
| Grant date | Mar 2, 2021 |
| Priority date | — |
| Expiry date | Mar 9, 2037 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB25B7/22
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
The present invention provides an opening-closing device including a first component, a second component and a third component. The second component is rotatably connected with the first component, and the third component is rotatably connected with the second component. The present invention further includes a mode switching device for switching operating modes of the opening-closing device. The operating modes include a conventional mode and a labor-saving mode. When the opening-closing device is in the conventional mode, the third component is fixed relative to the second component. When the opening-closing device is in the labor-saving mode, the third component is rotated in the opening direction relative to the second component during opening of the opening-closing device, and the third component is rotated in the closing direction relative to the second component during closing of the opening-closing device.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.