Sun Been Kang

6964522, Nov 15, 2005

Jan 22, 2004

10/763775

Sun Goo Kang - Los Angeles CA, US
Marshall Saville - Torrance CA, US

Honeywell International Inc. - Morristown NJ

F16C032/06

384103, 384104, 384106

A high load capacity hydrodynamic journal foil bearing system is disclosed, which comprises a top foil and a plurality of undersprings. Preload forces are transferred from the undersprings to internal circumferential compressive forces within a top foil, resulting in low preload forces against the shaft, allowing the shaft to expand at high speeds without increasing the preload forces or overloading the fluid film. One underspring may have a different spring rate than another underspring. The top foil may be normalized to shaft shape and dimensions. These features may be accomplished with using less mechanical parts than other journal foil bearing system designs.

7108488, Sep 19, 2006

Mar 26, 2004

10/812281

Gerald Duane Larue - Torrance CA, US
Sun Goo Kang - Los Angeles CA, US
Werner Wick - Torrance CA, US

Honeywell International, Inc. - Morristown NJ

F02B 17/00
F02B 33/44
F16C 32/06
F02B 35/00
B61F 17/00

417407, 606051, 384103, 384105, 384106

A turbocharger includes a foil bearing assembly mounted in a center housing between a compressor and a turbine of the turbocharger. The bearing assembly forms a unit installable into the center housing from one end thereof, and the center housing is a one-piece construction. The bearing assembly includes a foil thrust bearing assembly disposed between two foil journal bearings. The journals foils are mounted in annular bearing carriers fixedly mounted in the center housing. A radially inner portion of a thrust disk of the thrust bearing assembly is captured between a shaft and a shaft sleeve of the turbocharger. The center housing defines cooling air passages for supplying cooling air to the foil bearings, and optionally includes a water jacket for circulating engine coolant through the center housing.

7553086, Jun 30, 2009

Jul 20, 2004

10/896099

Sun Goo Kang - Los Angeles CA, US
Marshall Saville - Torrance CA, US
Keith A. Hurley - Garden Grove CA, US

Honeywell International Inc. - Morristown NJ

F16C 27/02
F16C 17/02

384103, 384104, 384106

A journal foil bearing comprising a retaining member having an inner surface which defines a shaft opening within which a rotatable shaft is receivable for rotation; and a foil assembly affixed to and lining the inner surface and comprising a plurality of foil sub-assemblies each subtending a circumferential segment, of the inner surface. Each of the foil sub-assemblies may comprise an under foil sandwiched between a spring foil disposed radially outwardly of the under foil, and a top foil disposed radially inwardly of the under foil, the under foil, the top foil, and the spring foil each having a leading edge distal from a trailing edge in a direction of rotation of the rotatable shaft, and each of the under foil, the top foil, and the spring foil being affixed to the retaining member along their respective leading edge, their respective trailing edge, or both their respective leading edge and their respective trailing edge, wherein a radius of curvature of the top foil is less than a radius of curvature of the under foil. A method of supporting a rotating shaft is also disclosed.

20050271311, Dec 8, 2005

Jun 7, 2004

10/863869

Marshall Saville - Torrance CA, US
Keith Hurley - Garden Grove CA, US
Aileen Mah - Redondo Beach CA, US
Sun Goo Kang - Los Angeles CA, US

Honeywell International Inc. - Morristown NJ

F16C032/06

384106000

A hydrodynamic bearing set, for use with a thrust disk disposed between planar surfaces of a housing, includes first and second topfoils disposed adjacent first and second thrust disk axial bearing surfaces and removably secured to the housing. An underspring is secured between each planar housing surface and the corresponding topfoil. Dual-leaf spring pairs attached to at least one topfoil periphery function to urge the topfoils away from the thrust disk axial bearing surfaces by applying a force against a planar housing surface, another topfoil, or a spacer washer secured between adjacent topfoil dual-leaf pairs or frictionally retained within the housing. Alternatively, a wavy washer, a conical spring, a Belleville washer, or a coil spring can be substituted for the dual-leaf spring pairs.