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:
Mar. 23, 1999
Filed:
Nov. 12, 1997
Joseph K Scharrer, Fair Oaks, CA (US);
Robert F Beatty, West Hills, CA (US);
Boeing North America, Inc., Seal Beach, CA (US);
Abstract
A foil bearing is used wherein the support for the foils are hydrostatically rather than mechanical spring supported. The bearing housing has a plurality of orifices for admitting hydrostatic fluid over the foils. The foils are then supported by the hydrostatic fluid. The hydrostatic foil bearing is stiffer, longer lasting, and easier to assemble than foil bearings with mechanical spring backings. Hydrostatically supported foil bearings also have variable spring rates depending on the pressure of the hydrostatic fluid, thus allowing the hydrostatic foil bearing to have adjustable capacity with speed. In addition the hydrostatic foil bearing damping between the rotor and housing is greater than foil bearings with mechanical spring backing.