Printed wiring board inspection apparatus
US6429673B1 · kind B1 · utility
20Cited by
4References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 28, 1999 |
| Grant date | Aug 6, 2002 |
| Priority date | — |
| Expiry date | Oct 28, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R1/07328
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The pneumatic cylinder is fixed on between the lower member of the upper unit and the lower member of the lower unit. As the shaft of the pneumatic cylinder extends, the upper unit starts lowering by its own weight at first. When the upper unit reaches to the point limited by the stopper, the lower unit then starts rising and the lower unit stops in a state where the shaft has extended to its full length. In this state, the probes and are in contact with the printed wiring board as applying a specified pressure to it.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.