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. 03, 2015
Filed:
Apr. 30, 2007
Ronald Struziak, Longmeadow, MA (US);
Christopher Mcauliffe, Windsor, CT (US);
Brent Merritt, Southwick, MA (US);
Seth Rosen, Middletown, CT (US);
Ronald Struziak, Longmeadow, MA (US);
Christopher McAuliffe, Windsor, CT (US);
Brent Merritt, Southwick, MA (US);
Seth Rosen, Middletown, CT (US);
Hamilton Sundstrand Corporation, Windsor Locks, CT (US);
Abstract
A hydrodynamic bearing is provided that includes an annular main foil having axially spaced inner and outer surfaces. Bump foils are supported circumferentially on the outer surface. Top foils are supported circumferentially on the inner surface opposite the bump foils. In one example, spacers are arranged between the top foils and the main foils. The spacers can be provided by chemically etching the main foil, in one example. The bump foils include first and second corrugated portions respectively providing first and second axially heights. The first axial height is less than the second axial height and is arranged at a leading edge of the bump foil relative to the direction of airflow across the hydrodynamic bearing.