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:
May. 20, 1997
Filed:
Apr. 05, 1996
Applicant:
Inventor:
Steven D Lawer, Derby, GB;
Assignee:
Rolls-Royce plc, London, GB;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F01D / ;
U.S. Cl.
CPC ...
415160 ;
Abstract
A power turbine includes pivotable vanes for a variable area nozzle which are accurately and consistently assembled in a first full throat area position by providing an abutment and an abutment surface on gear segment arms attached to spindles at the radially outermost ends of the vanes. When the first vane has been fitted in the 100% throat position by threading its aerofoil portion through a slotted aperture in the turbine casing 10, the remaining vanes are accurately angularly positioned by causing their abutments to abut the abutment surface on the previously fitted vane segment arm.