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:
Aug. 02, 2005
Filed:
Nov. 01, 1999
Jörgen Ferber, Küssaberg, DE;
Bernhard Weigand, Lauchringen, DE;
Jörgen Ferber, Küssaberg, DE;
Bernhard Weigand, Lauchringen, DE;
Alstom, Paris, FR;
Abstract
A thermally highly loaded machine component (), which is protected from overheating by film cooling, is provided with conical cooling passages () of circular cross section. The cooling passages are designed so as to be divergent from the cold-gas side () toward the hot-gas side. The conical cooling passages, as compared with cylindrical passages with regard to the mass flow of cooling medium () fed through the cooling passages, are substantially less dependent on the pressure ratio between the cold-gas side () and hot-gas side () of the component. The straight conical cooling passages of round cross section throughout may be produced in a very simple manner by laser drilling, with a convergent cutting beam being used for the machining.