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. 22, 1988
Filed:
Jun. 30, 1987
Raymond Smith, Monclova, OH (US);
Quentin Z Peregoy, Toledo, OH (US);
George E Richardson, Sylvania, OH (US);
Teledyne Industries, Inc., Los Angeles, CA (US);
Abstract
A turbine engine, having a cooling passage diverting a part of the airflow from the turbine compressor for impingement upon the turbine blades, includes a concentric pair of apertured rings disposed in the passage for variably obstructing flow through the cooling passage between zero and a maximal value. One of the rings is fixed to the turbine housing, while the other of the rings is rotatable with respect to the first ring and the housing. The mobile ring can be rotated by a pressurized cylinder and piston assembly, or by a biasing device causing abutment of a stop on the second ring against an abutment surface on a cam. The cylinder and piston are actuated, or the cam is rotated, in dependence upon an engine operating characteristic such as engine speed, pressure, temperature, flight condition or other determinable parameter.