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:
Sep. 23, 2003
Filed:
Dec. 20, 2001
Alan R Jones, Derby, GB;
Rolls-Royce plc, London, GB;
Abstract
A fluid flow control valve ( ) comprises a valve seat ( ) and a valve stem ( ) which is movable towards or away from the valve seat ( ) to control the fluid flow through the valve ( ). A magnetostrictive element ( ) is arranged to move the valve stem ( ) towards the valve seat ( ) and a spring ( ) is arranged to move the valve stem ( ) away from the valve seat ( ). A valve wall ( ) encloses the valve seat ( ), valve stem ( ), spring ( ) and magnetostrictive element ( ). A magnetic coil ( ), a keeper ( ) and a permanent magnet ( ) are arranged around the valve wall ( ). The fluid flow control valve ( ) is used to modulate the supply of fuel to a gas turbine engine combustion chamber to reduce combustion noise especially in premixed lean burn combustion chamber. The advantage is that there are no seals in the valve wall where leakage may occur and the valve is modular.