The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 11, 2007
Filed:
Jan. 19, 2005
Applicants:
Donald P. Stubblefield, Lake Oswego, OR (US);
Jerry D. Stubblefield, Lake Oswego, OR (US);
Inventors:
Donald P. Stubblefield, Lake Oswego, OR (US);
Jerry D. Stubblefield, Lake Oswego, OR (US);
Assignee:
North Shore Partners, Lake Oswego, OR (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B63B 1/38 (2006.01); B64C 3/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
An apparatus and method for reducing surface friction drag on the hull of a surface vessel by entraining air into water flowing in the boundary layer flow along the hull. The apparatus creates a reduced pressure region by diverting a first portion of the flow away from the surface of the hull. An air pocket is formed in the reduced pressure region and a second portion of the flow is directed through the air pocket by nozzles, which acts as a plunging jet and entrains air into the boundary layer.