Propeller shaft apparatus

Details Propeller shaft apparatus Propeller shaft apparatus

2006-01-25

2008-10-21

Sotelo, Jesús D (Department: 3617)

Marine propulsion

Screw propeller

Shafting

C464S180000

Reexamination Certificate

active

07438612

ABSTRACT:
A paper tube of a propeller tube12is made by winding a single faced corrugated fiberboard16in which a wavy corrugating medium16bis fixed to one side of a flat linerboard16aso that the corrugating medium16bis oriented outwards, and the corrugating medium16bcontacts with an inner surface of the propeller tube12,so as to enhance a vibration controlling function. When winding the single faced corrugated fiberboard16,since the single faced corrugated fiberboard16cannot be wound in a direction oblique to a direction of ridges of the corrugating medium16b,there are no fears that the shape of the single faced corrugated fiberboard16is collapsed to taper axially, thereby it becomes possible to prevent a reduction in vibration controlling function that would otherwise be caused due to a change in the shape of the paper tube.

REFERENCES:
patent: 2751765 (1956-06-01), Rowland et al.
patent: 4012923 (1977-03-01), Lundgren
patent: 5924531 (1999-07-01), Stark et al.
patent: 6190263 (2001-02-01), Kimoto et al.
patent: 2405881 (2000-11-01), None
patent: 01-148621 (1989-06-01), None
patent: 08-105489 (1996-04-01), None
patent: 2601067 (1999-09-01), None

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