Crystal ingot lifting load measuring device
US4916955A · kind A · utility
16Cited by
3References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 10, 1988 |
| Grant date | Apr 17, 1990 |
| Priority date | — |
| Expiry date | Aug 10, 2008 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T117/1072
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
A load measuring device for measuring the pulling up load of a monocystalline rod (38) grown by the Czochralski method utilizes a strain gauge (20). The monocrystalline rod (38) is pulled up by wire rope (36) consisting of multiple strands. The pulley (34) guiding the wire rope between a drum (36) and a crystal holder (44) has a guide groove which has a cross-sectional shape which is substantially identical to a semicircle circumscribing the wire rope.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.