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The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.

The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.

Patent No.:

US 4013425 B1

PDFFull Text
Date of Patent:
Mar. 22, 1977

Filed:

Jun. 22, 1976

Thermometric bimetallic structure of high strength at high temperature

Applicant:
Inventors:

Horst Muhlberger, Frankfurt am Main, DT;

Manfred Ruhle, Offenbach, DT;

Assignee:

Metallgesellschaft Aktiengesellschaft, Frankfurt am Main, DT;

Attorneys:

Ross; Karl F.

Dubno; Herbert

Primary Examiner:

Arthur J Steiner

Int. Cl.
CPC ...
B32B / ; C22C / ; C22C / ; C22C / ;
U.S. Cl.
CPC ...
291955 ; 7512 / ; 7512 / ; 7512 / ; 7512 / ; 7512 / ; 7512 / ; 7512 / ; 7512 / ; 7512 / ;
Abstract

A thermometric bimetallic structure of high strength at elevated temperatures of, say, 500.degree. C to 700.degree. C, comprises an active component and a passive component secured together, the active component having a coefficient of thermal expansion of about 19 .times. 10.sup.-.sup.6 .degree.C.sup.-.sup.1 to 22 .times. 10.sup.-.sup.6 .degree. C.sup.-.sup.1 while the passive component has a coefficient of expansion of 3 .times. 10.sup.-.sup.6 .degree. C.sup.-.sup.1 to 12 .times. 10.sup.-.sup.6 .degree. C.sup.-.sup.1. The active component, which expands to a substantially greater extent than the passive component upon heating, consists of 0.4 to 0.9% by weight carbon, 0.03 to 0.1% by weight nitrogen, 10 to 14% by weight nickel, 3 to 7% by weight manganese, 0.2 to 1% by weight niobium and/or tantalum, 0.5 to 1.5% by weight vanadium, up to 1.5% by weight molybdenum, up to 1.5% by weight tungsten, up to 3.5% by weight chromium, up to 0.5% by weight silicon and the balance iron and unavoidable impurities resulting from the melting of the ingredients to form the alloy. The laminate of the two components can be cold worked to improve its hardness.

Find Patent Forward Citations

Muhlberger, Horst. (1977). Thermometric bimetallic structure of high strength at high temperature (U.S. Patent No. 4013425). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/4013425

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