Patent · US Expired

Compact level

US4590682A · kind A · utility

23Cited by

6References

3Claims

0Family size

Inventor

Robert Koch · Munich, DE

Key dates

Filing date	Mar 21, 1985
Grant date	May 27, 1986
Priority date	—
Expiry date	Mar 21, 2005

Classification

Technology area (CPC G)Physics
CPC primaryG01C9/28
WIPO fieldMeasurement
WIPO sectorInstruments

Abstract

A level containing horizontal, vertical and rotatable bubble capsules is constructed using only two different housing parts. The main housing is comprised of two identical halves secured back to back. A cylindrical chamber which houses the rotatable bubble is also comprised of two identical halves secured back to back. The structure is simple and economical to produce.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.