Propeller vent plug with fluid passage

Details Propeller vent plug with fluid passage Propeller vent plug with fluid passage

1997-11-17

1999-06-29

Avila, Stephen

Marine propulsion

Means for accomodating or moving engine fluids

Means for handling exhaust gas

416 93A, B63H 2110

Patent

active

059160039

ABSTRACT:
A propeller device is provided with vent apertures and plugs which fit into the vent apertures to be retained in position during use of the propeller device. The vent plugs are provided with openings therethrough so that fluids can flow from a region within a hub of the propeller device to a region proximate the outer cylindrical surface of the hub. The fluids flowing from the internal portion of the hub flow towards regions of low pressure near the propellers. The plugs can be changed to modify the size of the ventilation aperture without having to change the propeller device itself. One embodiment of the plug is provided with a moveable cover that closes the opening progressively in response to increasing rotational speed of the propeller device.

REFERENCES:
patent: 4545771 (1985-10-01), Iio
patent: 4802872 (1989-02-01), Stanton

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