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:
Jun. 11, 1991
Filed:
Dec. 28, 1987
John R Rosenberger, Centerport, NY (US);
Other;
Abstract
Four spars project downward and outward from a common juncture; a mast projects upward from the same juncture. Adjustable cables interconnect all the distal ends to each other. Thus a uniquely strong and light pentahedral-shaped space frame is provided. A unique system for cable length adjustment makes it practical to reconfigure the geometry of the vessel while underway. The vessel can be made tall and narrow for easier maneuvering, in light winds, or broad and low for maximum capsize resistance. Two hulls provide a suitable low speed displacement shape. When sufficient propulsion force is present, however, these two hulls can be split into four hulls, each of a planing shape and each connected to a spar. The wind drag, that is noramlly associated with frames of this nature, is transformed into useful forces by airfoil-shaped spars which are rotatable. These forces may be used to produce a downward push to prevent heeling over, a lift to reduce hydrodynamic drag, and a propulsive push.