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:
Mar. 22, 2016
Filed:
Jul. 18, 2012
Daniel Benjamin, Simsbury, CT (US);
Steve A. Mcleod, Rocky Hill, CT (US);
Daniel R. Kapszukiewicz, Plainfield, CT (US);
Larry James Timmons, Middletown, CT (US);
Paul D. Genereux, Stuart, FL (US);
Daniel Benjamin, Simsbury, CT (US);
Steve A. McLeod, Rocky Hill, CT (US);
Daniel R. Kapszukiewicz, Plainfield, CT (US);
Larry James Timmons, Middletown, CT (US);
Paul D. Genereux, Stuart, FL (US);
UNITED TECHNOLOGIES CORPORATION, Hartford, CT (US);
Abstract
A method is disclosed for manufacturing a tie shaft for aero or land based gas turbine engine. The method includes flow forming a tie shaft preform to produce a tie shaft. In one example, the tie shaft includes a nickel alloy cylindrical wall having a length to diameter ratio of at least 6:1, wherein the diameter is an average outer diameter. The wall includes a minimum effective strain of 0.3 in/in (7.6 mm/mm), and a grain size is in the range of G4 to G16 per ASTM E112. The wall includes a roll formed threaded surface having a thread roughness of less than 1260 μin (32 microns).