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. 20, 2011
Filed:
Feb. 08, 2007
Alex Habibvand, Orange, CA (US);
Alex Habibvand, Orange, CA (US);
Roller Bearing Company of America, Inc., Oxford, CT (US);
Abstract
In a rotary wing aircraft tail rotor head assembly having a ball bearing on a spindle at the head of a rotor wing, the ball bearing contains slug ball separators between the balls in the bearing. The separator may be made from PEEK, PTFE, or polyimide. The ball-to-ball separation between two balls of like diameter provided by the separator may about 3.2 to about 64% of the diameter of one of the balls. A separator may have an annular configuration that defines a passage therethrough, the passage having two ends and the interior of the separator being tapered to define a maximum diameter at each end and a minimum diameter therebetween. The taper of the chamfered surface of the slug ball separator may define a conical angle of about 75° to about 120°. A ball bearing as described herein may also be used in a rotary wing aircraft swashplate having a stationary plate, a rotating plate; and a thrust bearing between the stationary plate and the rotating plate.