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.:
Date of Patent:
Dec. 28, 1982
Filed:
Nov. 14, 1980
Stanley M Golemo, Jr, West Lawn, PA (US);
Anthony J Izbicki, Reading, PA (US);
Hood and Co., Inc., Hamburg, PA (US);
Abstract
Thermostat metals combining properties of relatively high flexivity and good corrosion resistance are prepared by metalurgically bonding a corrosion resistant high expansive alloy (1) to a less corrosion resistant low expansive alloy (2) and capping the low expansive alloy (2) with a corrosion resistant, moderately low expansive alloy (3) of similar hardness to that of the low expansive alloy (2). The preferred high expansive alloy (1) is comprised of about 18 wt. % Ni; 11 wt. % Cr; and balance Fe. The preferred low expansive alloy (2) is Invar (36 wt. % Ni; balance Fe). The preferred corrosion resistant low expansive alloy (3) is comprised of about 20 wt. % Ni; 26 wt. % Co; 7 wt. % Cr; balance Fe. The preferred volumetric ratios of the metals is about 50% of the high expansive alloy (1), 30 to 40% of the low expansive metal (2) and 10 to 20% of the corrosion resistant low expansive alloy.