Measuring and testing – Tire – tread or roadway – Tire inflation testing installation
Patent
1989-04-28
1990-04-24
Woodiel, Donald O.
Measuring and testing
Tire, tread or roadway
Tire inflation testing installation
7386204, G01M 1702
Patent
active
049189832
ABSTRACT:
In an apparatus for checking a motor vehicle tire the bead of a tire is subjected to a stretching effect by radially outwardly displaceable clamping jaws, and the compression force applied to the bead by the respective clamping jaws is measured by force measuring means. Each force measuring means comprises a radially movable frame structure in which a central force transmitting portion connected to the respective clamping jaw is supported movably in relation to outer portions of the frame structure by resiliently bendable support portions bearing strain gauges, in such a way that when a tire is clamped by the clamping jaws, the force transmitting portion is displaced, causing deformation of the support portions, such deformation being measured by means of the strain gauges. The force transmtting portion is supported in the frame structure in such a way that it is substantially insensitive to movements and transverse forces which can result from radial guidance for the clamping jaws.
REFERENCES:
patent: 1850223 (1932-03-01), Castricum
patent: 4297877 (1981-11-01), Stahl
Gebr. Hofmann GmbH & Co. KG Maschinenfabrik
Woodiel Donald O.
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