Blocking device and method
US11931849B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 26, 2021 |
| Grant date | Mar 19, 2024 |
| Priority date | — |
| Expiry date | Nov 14, 2042 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29D11/00942
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A blocking device and method for mounting a leap block to a lens by a lifting/lowering mechanism using a magnet and a wire is described comprising a blocking device housing having a guide; a movable leap block attachment part mounted on the guide of the housing; a spring having a lower end supporting the attachment part and an upper end supporting the blocking device housing, the spring pushing the attachment part downward, so that the attachment part protrudes below the lower end of the blocking device housing; a wire having one end connected to a pulley and the other end connected to the attachment part, so the wire pulling the attachment part upward when the pulley rotates; a leap block attached to the lower end of the attachment part by magnets; and a blocking arm coupled to the housing and to move the housing up and down.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.