Fluid thrust assembly with self-aligning thrust bearings

Marine propulsion – Jet drive

Reexamination Certificate

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C440S083000

Reexamination Certificate

active

06945833

ABSTRACT:
A thrust bearing assembly is described that includes a self-aligning thrust bearing used in fluid thrust assemblies where the thrust may become unevenly distributed, e.g. in a water jet propulsion unit. The thrust bearing is designed to be lubricated by water and to be self-aligning against uneven thrust forces applied to it. The self-alignment is achieved by the design of the bearing, which is in the form of an annular multi-layer plate. The bearing plate comprises a metallic central core layer, an interface layer of marine bearing material on one side of the core and a flexible backing layer on the other side of the core. The backing layer supports the thrust flange against a support face and is formed of a high resilience polymer material capable of being deformed under thrust action sufficiently to align the thrust bearing to correct for uneven thrust.

REFERENCES:
patent: 4319790 (1982-03-01), Thomson
patent: 5266009 (1993-11-01), Tasaki et al.
patent: 6193570 (2001-02-01), Ishigaki
patent: 6287162 (2001-09-01), Freitag et al.
patent: 6293836 (2001-09-01), Blanchard
patent: 6302047 (2001-10-01), Cannon
patent: 6358107 (2002-03-01), Roos
patent: 6875067 (2005-04-01), Tornblad et al.

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