Drive shaft bearing structure for watercraft

Details Drive shaft bearing structure for watercraft Drive shaft bearing structure for watercraft

2005-03-29

2005-03-29

Wright, Andrew D. (Department: 3617)

Marine propulsion

Screw propeller

Shafting

C440S112000

Reexamination Certificate

active

06872108

ABSTRACT:
A bearing body for rotatably supporting a drive shaft for driving an impeller on a watercraft body includes a bearing chamber containing bearing members rotatably supporting the drive shaft. Seal members are disposed on both sides of the bearing members and partition the bearing chamber by making contact with an outside circumferential surface of the drive shaft. The seal members are disposed so that grease in the bearing chamber does not leak out through the contact portions between the seal members and the outside circumferential surface of the drive shaft, and a breather passage is communicated with the bearing chamber. Two bearing members within the bearing chamber have a space formed between the bearing members, e.g., to form a grease reservoir between the bearing members. The aforementioned bearing structure reduces the necessity of maintenance, e.g., supplying grease to a drive shaft bearing portion, or at least the reduces the required frequency of maintenance.

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patent: 5795198 (1998-08-01), Pedone
patent: 07112679 (1995-05-01), None

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