Vacuum chuck
US4184292A · kind A · utility
20Cited by
7References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 24, 1978 |
| Grant date | Jan 22, 1980 |
| Priority date | — |
| Expiry date | Mar 24, 1998 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB24B13/005
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A vacuum chuck for use in lens grinding having a vertical bore extending downwardly into the block to join a through horizontal bore provided with a venturi, so that by blowing air through the venturi a vacuum is created in the vertical bore to secure the lens placed on top of the block.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.