Multihull vessels, including catamarans, with wave piercing hull configuration
Patent 5191848 Issued on March 9, 1993. Estimated Expiration Date: 
September 17, 2012. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
September 17, 2012. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References D305637 D321854 1133342 3090974 3541987 3656445 3665885 Displacement hull Asymmetric minimum resistance hull Patent #: 4811676 InventorAssigneeApplicationNo. 946156 filed on 09/17/1992US Classes:114/61.2, Having a specifically defined hull shape114/61.26, Having specific dimensional or speed ratio (e.g., Froude number, etc.)114/61.3And specific midbody (e.g., waist, etc.)ExaminersPrimary: Basinger, Sherman D.Attorney, Agent or FirmInternational ClassesB63D 001/06B63D 001/08 B63D 001/12 AbstractA catamaran vessel with a pair of spaced apart, parallel hulls which are made of sealed watertight configuration of composite marine material and interconnected by a deck and cabin structure with depending stilts joined to the hulls. The hulls have a wave piercing configuration in which the length to beam or fineness ratio of each hull is approximately 16.3:1 with a prow that is essentially knife-edged and vertical, the vertical section contours of the forward portion of the hull are elliptical and gradually transition to an essentially rectangular contour along the rear portion. The underside of the deck between the stilts has a convex undersurface which constitutes a planing hull structure above the top of the pair of hulls and between the stilts. The depicted vessel is power driven by motor-driven propellers at the stern of each hull. The specific hull configuration is a wave-piercing hull which can be combined in multihull ocean going vessels, such as proas (single main hull), catamarans (two hulls) and trimarans (three hulls).Other References
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