Patent · US Expired

Extensometer and support for an extensometer

US5537754A · kind A · utility

12Cited by

8References

12Claims

0Family size

Assignee

Deutsche Forschungsanstalt Fur Luft-Und Raumfahrt E.V. · DE

Inventors

Volker Bachmann · Eriskirch, DE
Claudio Dalle Donne · Bremen, DE

Key dates

Filing date	Nov 4, 1994
Grant date	Jul 23, 1996
Priority date	—
Expiry date	Nov 4, 2014

Classification

Technology area (CPC G)Physics
CPC primaryG01N2203/0623
WIPO fieldMeasurement
WIPO sectorInstruments

Abstract

The extensometer comprises a basic body (18) which carries two tap legs (12) which abut a specimen (16) to be measured so as to be frictionally locked thereto. Due to the frictional contact, the tap legs (12) move relative to each other when the specimen is subjected to external stresses. Via a signal transmitter (24), this movement of the tap legs (12) is detected. The extensometer (10) is floatingly supported by introducing gas in the clearance between a baffle body (36) connected to the extensometer (10) and a stationary support member (28) toward the baffle body (36). On the one hand, the upbuilding gas cushion presses the extensometer (10) with its tap legs (12) against the specimen (16) so as to be frictionally locked thereto and, on the other hand, permits pivoting of the extensometer (10) corresponding to the movement of the measuring points.

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