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:
Nov. 29, 1977
Filed:
Nov. 04, 1976
Hugh M Davis, Trenton, NJ (US);
Alan H Miller, Philadelphia, PA (US);
De Laval Turbine Inc., Princeton, NJ (US);
Abstract
The disclosure relates to rotary machinery, including a wear ring seal member stationarily mounted in a holding member which extends generally coaxially about a rotatable cylindrical member in substantially sealing relationship with the surface of the rotatable member, the rotatable member being made of carbon steel. The improvement resides in providing the surface of the rotatable carbon steel member in sealing relationship with the ring seal with a fused alloy coating metallurgically bonded thereto, the coating being formed of a heat and corrosion resistant welding alloy composition containing about 10% to 30% by weight chromium and the balance at least about 60% nickel, such that the carbon steel member is protected against oxidation and ignition due to overheating.