Hydrodynamic fluid film bearing having a key-less foil

Details Hydrodynamic fluid film bearing having a key-less foil Hydrodynamic fluid film bearing having a key-less foil

2006-07-04

2006-07-04

Footland, Lenard A. (Department: 3682)

Bearings

Rotary bearing

Fluid bearing

C384S103000

Reexamination Certificate

active

07070330

ABSTRACT:
An improved and enhanced hydrodynamic fluid film bearing for rotatably supporting a shaft journal is provided and includes a stationary retaining member, at least two generally cylindrical foil elements attached to one another and forming an anti-rotation fin, and a generally cylindrical resilient backing member. The retaining member has an inner surface defining a cylindrical opening for receiving a shaft journal. The inner surface also includes a longitudinally extending slot in which the anti-rotation fin formed by the foil elements is mounted so that the foil elements line at least a portion of the cylindrical opening. The resilient member is also disposed within the cylindrical opening generally concentric to and radially outward from the foil elements. The foil elements may be discrete elements attached together to form the anti-rotation fin, or alternatively formed from a single foil with a bend defining the anti-rotation fin.

REFERENCES:
patent: 3615121 (1971-10-01), Barnett et al.
patent: 4415280 (1983-11-01), Agrawal
patent: 4415281 (1983-11-01), Agrawal
patent: 4549821 (1985-10-01), Kawakami
patent: 4950089 (1990-08-01), Jones
patent: 5634723 (1997-06-01), Agrawal
patent: 2005/0163407 (2005-07-01), Kang et al.
patent: 58-160619 (1983-09-01), None
European Search Report for Serial No. EP 05 002731 dated Dec. 20, 2005.

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