Boat hull tunnel extension

Details Boat hull tunnel extension Boat hull tunnel extension

2005-03-29

2005-03-29

Olson, Lars A. (Department: 3617)

Marine propulsion

Screw propeller

Having means to control flow around propeller

C114S271000

Reexamination Certificate

active

06872107

ABSTRACT:
A boat hull having a tunnel structure along the bottom of the hull in the form of a truncated hollow partial cone indentation and extension parallel to the keel of the boat. The tunnel has a cone shape and has a truncated end attached to the bottom of the hull near the keel and a constant radius extension to an open end attached to the transom of the boat. The tunnel encloses a propeller shaft extending from the boat interior at the truncated end is cone shaped to the position of a propeller partially within the tunnel and then has a constant radius extension to the transom of the hull. The tunnel extension directs the forces from the propeller to the stern of the boat and the increased area surface of the bottom in a manner that increase the lift on the stern to assist in getting the boat into planing attitude from a starting attitude.

REFERENCES:
patent: 835530 (1906-11-01), Huff
patent: 3515087 (1970-06-01), Stuart
patent: 3626894 (1971-12-01), Stuart
patent: 3793980 (1974-02-01), Sherman
patent: 3811399 (1974-05-01), Kobayashi et al.
patent: 4057027 (1977-11-01), Foster
patent: 4609360 (1986-09-01), Whitehead
patent: 6544081 (2003-04-01), Paulo

Affiliated with

Also associated with

Rating

Boat hull tunnel extension does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Boat hull tunnel extension, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Boat hull tunnel extension will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3441992