Level vial with extender pitch range
US5003699A · kind A · utility
9Cited by
6References
13Claims
0Family size
Inventor
Key dates
| Filing date | Jul 19, 1982 |
| Grant date | Apr 2, 1991 |
| Priority date | — |
| Expiry date | Jul 19, 2002 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01C9/34
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A level vial for use in connection with a level instrument for determining angular relationships wherein the geometry of the internal vial components and, in particular, the bore and core surfaces co-act with the bubble to produce a level vial having an increased radius of curvature while maintaining standard sensitivity and having the capability of providing a visual measure of a relatively wide range of angular deflections from horizontal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.