Apparatus for checking the internal surface of a pipe or the like
US4557598A · kind A · utility
21Cited by
4References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 9, 1982 |
| Grant date | Dec 10, 1985 |
| Priority date | — |
| Expiry date | Dec 9, 2002 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01M3/005
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An improved apparatus for checking the inside of a pipe or the like is proposed. Two reflex mirrors are provided, one for reflecting the light from a source of light and the other for reflecting the light from the object being checked. Because respective mirrors are provided for the source of light and for the light from the object, the inside of the object can be checked clearly.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.