Blue top setting device
US4567669A · kind A · utility
2Cited by
13References
16Claims
0Family size
Inventor
Key dates
| Filing date | May 8, 1984 |
| Grant date | Feb 4, 1986 |
| Priority date | — |
| Expiry date | May 8, 2004 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01C15/06
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A first rod includes a relative elevation scale and a first fluid container vertically adjustable with respect to the relative elevation scale to a position corresponding to a desired elevation relative to the base of the first rod, and a second rod includes a second fluid container of substantially lesser cross sectional area than the first fluid container, a predetermined level of fluid in the second fluid container indicating that the base of the second rod is at a desired elevation relative to the base of the first rod.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.