Penetration hardness tester

Details Penetration hardness tester Penetration hardness tester

1997-03-21

2000-11-07

Raevis, Robert

Measuring and testing

Hardness

By penetrator or indentor

G01N 342

Patent

active

061420107

ABSTRACT:
A hardness tester is disclosed which conducts its hardness test through a penetrator impinging upon the surface of a test specimen. Enhanced accuracy and repeatability is achieved through the use of a closed loop system and directly mounting a load cell to the indentor, connecting a linear displacement transducer directly to the load cell and eliminating an elevating screw in initially positioning and applying load to the specimen to be tested.

REFERENCES:
patent: 4094188 (1978-06-01), Bellouin et al.
patent: 4111039 (1978-09-01), Yamawaki et al.
patent: 4671104 (1987-06-01), Fischer
patent: 4820051 (1989-04-01), Yanagisawa et al.
patent: 5067346 (1991-11-01), Field

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