Measuring and testing – Hardness – By penetrator or indentor
Patent
1996-01-25
1997-04-01
Raevis, Robert
Measuring and testing
Hardness
By penetrator or indentor
G01N 342
Patent
active
056168578
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
Conti Richard
Merck, Jr. John J.
Wyman Jon
Instron Corporation
Raevis Robert
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