Resumes
Resumes
Douglas Paulo Phones & Addresses
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20674 Forest Ave, Castro Valley, CA 94546 (510) 581-2947
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Hayward, CA
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Alameda, CA
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20674 Forest Ave, Castro Valley, CA 94546 (510) 703-4323
Work
Position:
Food Preparation and Serving Related Occupations
Education
Degree:
Associate degree or higher
Emails
Publications
Us Patents
Boat Hull Tunnel Extension
View pageUS Patent:
6872107, Mar 29, 2005
Filed:
Jul 29, 2003
Appl. No.:
10/629539
Inventors:
Douglas G. Paulo - Castro Valley CA, US
International Classification:
B63H005/16
US Classification:
440 69, 114271
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.
Boat Hull With Tunnel Structure
View pageUS Patent:
6544081, Apr 8, 2003
Filed:
Oct 10, 2001
Appl. No.:
09/974365
Inventors:
Douglas G. Paulo - Castro Valley CA, 94546
International Classification:
B63H 516
US Classification:
440 69, 440 70
Abstract:
A boat hull having a tunnel structure along the bottom of the hull in the form of a truncated hollow partial cone indentation parallel to the keel of the boat. The tunnel has a truncated end attached to the bottom of the hull near the keel and 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, the propeller shaft, a propeller and a rudder. The angle of the cone with respect to the keel places the propeller about 45% to 50% within the tunnel at planing attitude or speed. The combination of the tunnel placement along the hull and the axis of the propeller shaft increases the efficiency of the boat and reduces fuel consumption.