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:
Aug. 10, 2010
Filed:
Sep. 15, 2006
Michael C. Roberts, Bristol, GB;
Michael C. Roberts, Bristol, GB;
Rolls-Royce PLC, London, GB;
Abstract
The present invention provides an actuating apparatus for moving relatively rotatable components. In one embodiment the apparatus comprises: a bearing () including first () and second () relatively rotatable bearing elements for mounting respective first () and second () rotatable components for relative rotation about a common axis; a pneumatic or hydraulic actuator having a pair of co-acting parts (), including a first part () fixed with respect to the said first rotatable element and a second part () fixed with respect to the said second rotatable element; and, means () for energising and/or de-energising said actuator means to effect movement of the said co-acting parts and thereby relative rotation of the said first and second bearing elements about the said bearing axis. The actuator may comprise at least one chamber () defined between a pair of relatively rotatable annular members () each having at least one dividing element () extending into the chamber to divide the interior of the chamber into separate circumferential regions (). Pressure differentials generated in the chamber across one or more of the dividing elements effect relative rotation of the first and second bearing elements.