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:
Dec. 02, 2014
Filed:
Aug. 05, 2013
Rolls-royce Plc, London, GB;
Ingo Henry Johannes Jahn, West End, AU;
Christopher Davies, Derby, GB;
Rolls-Royce PLC, London, GB;
Abstract
An intershaft seal is provided for inner and outer coaxial shafts which rotate relative to each other. The seal is located in an annular space between the shafts and maintains an axial pressure differential between a fluid pressure on a first side of the seal and a different fluid pressure on a second side of the seal. The seal includes first and second runners which project into the annular space from a first one of the shafts and extend circumferentially around the first shaft such that a cavity is formed between the runners. The seal further includes a sealing ring which is coaxial with the shafts and is located in the cavity.