Hardness tester

Details Hardness tester Hardness tester

2006-06-27

2006-06-27

Raevis, Robert (Department: 2856)

Measuring and testing

Hardness

By penetrator or indentor

Reexamination Certificate

active

07066013

ABSTRACT:
A hardness tester includes a supporting frame having a guiding channel, a driving axle slidably disposed in the supporting frame, and a penetrating pin, having a pin head, coaxially disposed in the guiding channel in a slidably movable manner to coaxially align with the driving axle for the pin head to penetrate on a testing surface of a tested object. A linear displacement device includes a transmission shaft movably disposed in the supporting frame at a position universally contacting between the driving axle and the penetrating pin, and a displacement sensor supported at the transmission shaft, wherein when the driving axle is driven for applying a penetrating force to the penetrating pin through the transmission shaft, the linear sensor detects a linear displacement of the transmission shaft with respect to the penetrating pin for measuring the hardness of the tested object.

REFERENCES:
patent: 1544332 (1925-06-01), Mance
patent: 2372662 (1945-04-01), Dewey
patent: 2956432 (1960-10-01), Henrikson
patent: 3696662 (1972-10-01), Foltz et al.
patent: 4196616 (1980-04-01), Argabrite et al.
patent: 4245496 (1981-01-01), Napetschnig
patent: 4262525 (1981-04-01), Ernst
patent: 4534212 (1985-08-01), Targosz

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