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. 20, 2001
Filed:
May. 30, 2000
Martin A J Emery, Bristol, GB;
Kevin P Self, Bristol, GB;
Rolls-Royce PLC, London, GB;
Abstract
A hollow airfoil (,) has an internal air system in which a cooling gap (,) adjacent the internal surface (,) is formed by a liner insert (,) consisting of a shaped panel (,). At least some of the cooling air circulating through the gap (,) enters through a screening arrangement, comprising exclusion apertures (,), which removes particulates over a predetermined size (e). The air is fed into a plenum chamber (,) which may be formed by a pressing in the insert panel (,). There are two exits from the plenum (,): a first is through the screening arrangement to admit filtered air to the wall cooling gap (,), and a second is via apertures (,) in the airfoil wall (,) the sizes (d) of which apertures are large enough to pass the screened particulates into the gas path.