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:
Oct. 30, 2007
Filed:
Jan. 10, 2005
Denis Amiot, Dammarie les Lys, FR;
Anne-marie Arraitz, Nandy, FR;
Thierry Fachat, Moissy Cramayel, FR;
Alain Gendraud, Vernou la Celle sur Seine, FR;
Pascal Lefebvre, Vulaines sur Seine, FR;
Delphine Roussin-moynier, Antony, FR;
Denis Amiot, Dammarie les Lys, FR;
Anne-Marie Arraitz, Nandy, FR;
Thierry Fachat, Moissy Cramayel, FR;
Alain Gendraud, Vernou la Celle sur Seine, FR;
Pascal Lefebvre, Vulaines sur Seine, FR;
Delphine Roussin-Moynier, Antony, FR;
Snecma Moteurs, Paris, FR;
Abstract
A clearance control device for controlling clearance between rotary blade tips and a stationary bushing of a gas turbine having a casing that is provided with at least two annular ridges, the clearance control device including a circular tuning unit that includes air circulation means for circulating air, said means being made up of at least three ducts; air supply means for supplying air to the air flow ducts; and air discharge means for discharging air on the ridges in order to modify the temperature, the air discharge means for each duct being made up of at least one top row having a number N of perforations disposed facing one of the side faces of the ridges and of at least one bottom row having a number 2N of perforations disposed facing a connection radius that connects the ridges to the casing.