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:
Feb. 28, 2017
Filed:
Aug. 21, 2012
Anthony Geoffrey Sheard, Colchester, GB;
Andreas Rhoden, Jonkoping, SE;
Anthony Geoffrey Sheard, Colchester, GB;
Andreas Rhoden, Jonkoping, SE;
Howden Axial Fans AB, Vaxjo, SE;
Abstract
An axial air movement fan having a plurality of variable pitch fan blades (), extending radially from a hub () rotatable about a main axis (), each blade () further being pivotable about its radial axis to vary the blade pitch. The blades () each are mounted on an associated bearing () mounted on said hub, the bearing comprising a ball bearing having a first radially inner race () fast the blade () and a second radially outer race () rotationally fast to the hub (). The balls () in the bearing are separated by separators (), each separator being generally cylindrical and having its cylindrical axis coaxial with the orbital axis () of the orbit of the balls () and being adapted to rotate about the said orbital axis (), the side faces of the separator each having a part spherical recess () adapted to receive a ball (). Rotation of the separator () about the orbital axis () is such as to entrain lubricant in the bearing and to bias the lubricant from adjacent the outer race () over the balls () towards the inner race ().