[특허]Hydrofoil boat stabilizer

Marine Dynamics, Inc.

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Hydrofoil boat stabilizer

특허상세정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	B63B-001/24
미국특허분류(USC)	114/274; 440/066
출원번호	US-0826412 (2010-06-29)
등록번호	US-8312831 (2012-11-20)
발명자 / 주소	Templeman, Jon Becker, Wayne
출원인 / 주소	Marine Dynamics, Inc.
대리인 / 주소	McAfee & Taft
인용정보	피인용 횟수 : 4 인용 특허 : 49

초록

A hydrofoil boat stabilizer having a cross-sectional area with the configuration of a true hydrofoil is provided. The hydrofoil includes a slip-on yoke designed to compressively fit on a cavitation plate of a boat motor lower drive unit. The wings of the hydrofoil include at least one angle of attack, and preferably, a plurality of angles of attack. The hydrofoil is shaped to reduced drag and minimize cavitation. A low-drag surface is included on at least a portion of the outer surface of the hydrofoil.

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1. A slip-on hydrofoil comprising: a yoke including: a center body defining a longitudinal channel therein, wherein said longitudinal channel has a first and second side and is open to a front of said center body;a pair of open-ended slots oppositely disposed in each of said channel sides and extending along a substantial length of said sides, wherein said open-ended slots are capable of receiving a cavitation plate of a boat motor;a tail section integrally formed with said center body and covering a portion of said longitudinal channel;a contoured trailing edge defined by said tail section, said contoured trailing edge angles upwardly into a trailing edge peak;a pair of wings integrally joined with said yoke and projecting outwardly therefrom, said pair of wings having a leading edge and a trailing edge, wherein said trailing edge is seamlessly integrated with said contoured trailing edge of said tail section;a plurality of securing devices disposed through said center body securing said slip-on hydrofoil to a cavitation plate. 2. The slip-on hydrofoil of claim 1, wherein said portion of said longitudinal channel covered by said tail section is less than one-half of a length of said longitudinal channel. 3. The slip-on hydrofoil of claim 1, wherein said slots have sufficient size to slip-on and around a torque tab affixed to said cavitation plate. 4. The slip-on hydrofoil of claim 1, wherein said wings have a tip and a root, and said wings have a continuous cross-sectional shape, said continuous cross-sectional shape having the configuration of a true hydrofoil. 5. The slip-on hydrofoil of claim 4, wherein said wings have a plurality of angles of attack, wherein said continuous cross-sectional shape maintains the configuration of a true hydrofoil continuously therethrough and through said plurality of angles of attack. 6. The slip-on hydrofoil of claim 5, wherein said true hydrofoil is selected from the group consisting of hydrofoils having a designation of NACA 63-209, Eppler E817, Eppler E818, Eppler E836, Eppler 837, Eppler E838, Eppler E874, Eppler E904, Eppler E908, and Speers H105. 7. The slip-on hydrofoil of claim 1, wherein said wings have at least three angles of attack. 8. The slip-on hydrofoil of claim 7, wherein said angles of attack have a continuous cross-sectional shape therethrough and said continuous cross-sectional shape is in the configuration of a H105 hydrofoil. 9. The slip-on hydrofoil of claim 1, wherein said channel is adjustable, said channel being able to slip-on and be secured to said cavitation plates having different sizes. 10. The slip-on hydrofoil of claim 1, wherein said securing devices compressively engage an edge of said cavitation plate. 11. The slip-on hydrofoil of claim 1, wherein said hydrofoil has an exposed outer surface defining a low-drag surface finish on substantially all of said exposed outer surface. 12. The slip-on hydrofoil of claim 1, further comprising a connective device, said connective device supplementing said securing device to secure said slip-on hydrofoil to a cavitation plate. 13. A hydrofoil comprising: a yoke having a center body;a longitudinal channel defined by said center body, said longitudinal channel having oppositely positioned walls defining oppositely positioned slots therein; anda pair of wings having a wing tip, a root, and a trailing edge, each said wing having a cross-sectional configuration of at least one true hydrofoil from said wing tip to said root, wherein said pair of wings are joined to said yoke at said root;a tail section integrally formed with said center body, said tail section defining a contoured trailing edge terminating into a trailing edge peak wherein said contoured trailing edge seamlessly integrates with said trailing edge of said wings; andat least one non-invasive securing device for retaining said hydrofoil on a cavitation plate. 14. The hydrofoil of claim 13, wherein said tail section covers a portion of said longitudinal channel, and wherein said tail section defines a low-drag surface thereon. 15. The hydrofoil of claim 14, wherein said portion of said longitudinal channel covered by said center body is less than one-half of a length of said longitudinal channel. 16. The hydrofoil of claim 13, wherein said contoured trailing edge has an upward sloping top and bottom, wherein said upward sloping bottom is steeper than said top, thereby providing for less turbulent departure of water flowing over said hydrofoil from said contoured trailing and reducing drag imparted to said hydrofoil. 17. The hydrofoil of claim 13, wherein said true hydrofoil is selected from the group consisting of hydrofoils having a designation of NACA 63-209, Eppler E817, Eppler E818, Eppler E836, Eppler 837, Eppler E838, Eppler E874, Eppler E904, Eppler E908, and Speers H105. 18. The hydrofoil of claim 13, wherein said slots are capable of receiving a cavitation plate of a boat motor and are sized to slip-on and around a torque tab affixed to said cavitation plate. 19. The hydrofoil of claim 13, wherein said wings have a first angle of attack, said first angle of attack being positioned outwardly on said wing. 20. The hydrofoil of claim 19, wherein said wings have a second angle of attack, said second angle of attack positioned closer to said root than said first angle of attack. 21. The hydrofoil of claim 20, wherein said wings have a third angle of attack, said third angle of attack positioned closer to said root than said second angle of attack. 22. The hydrofoil of claim 13, wherein said pair of wings have a plurality of lifting segments whereby each said lifting segment has an angle of attack separate from the angle of attack of said lifting segment immediately proximate thereto. 23. The hydrofoil of claim 13, wherein said yoke is adjustable, thereby allowing said center body to receive differently sized cavitation plates. 24. The hydrofoil of claim 14, wherein said non-invasive securing device compressively secures said center body to an edge of said cavitation plate. 25. The hydrofoil of claim 22, further comprising an additional securing device to supplement said non-invasive securing device. 26. The hydrofoil of claim 22, where the true hydrofoil shape includes at least two true hydrofoil shapes. 27. A minimum cavitation, low-drag hydrofoil comprising: a yoke including a longitudinal channel and a tail section, wherein said longitudinal channel has a pair of oppositely positioned slots disposed in oppositely positioned walls, wherein said tail section integrally covers a portion of said longitudinal channel;a pair of wings having a wing tip, a root, and a trailing edge, each said wing having a cross-sectional configuration of at least one true hydrofoil from said wing tip to said root, and each wing having at least one angle of attack, wherein said pair of wings are joined to said yoke at said root;a contoured trailing edge extending from said tail section and seamlessly integrated with said trailing edge of said wings, wherein said contoured trailing edge on said tail section is a juncture of a contoured flow surface area and an upward sloping bottom;a drag reducing surface; andat least one securing device for retaining said hydrofoil on a cavitation plate. 28. The minimum cavitation, low-drag hydrofoil of claim 27, wherein said slots are capable of receiving a cavitation plate of a boat motor and are sized to slip-on and around a torque tab affixed to said cavitation plate. 29. The minimum cavitation, low-drag hydrofoil of claim 27, wherein said drag reducing surface comprises of a plurality of small outward projections, said plurality of small projections varying across said drag reducing surface. 30. The minimum cavitation, low-drag hydrofoil of claim 27, further comprising a second angle of attack. 31. The minimum cavitation, low-drag hydrofoil of claim 30, wherein said first angle of attack is designed to provide lift to said hydrofoil at medium-to-high-speeds. 32. The minimum cavitation, low-drag hydrofoil of claim 30, wherein said second angle of attack is designed to provide lift to said hydrofoil at low-speeds. 33. The minimum cavitation, low-drag hydrofoil of claim 30, wherein said first angle of attack is closer to said wing tip than said second angle of attack. 34. The minimum cavitation, low-drag hydrofoil of claim 30, further comprising an angle of attack transition point positioned between said first and second angles of attack, wherein said angle of attack transition point has a plurality of angles of attack proximate to each other. 35. The minimum cavitation, low-drag hydrofoil of claim 27, wherein said true hydrofoil is selected from the group consisting of hydrofoils having a designation of NACA 63-209, Eppler E817, Eppler E818, Eppler E836, Eppler 837, Eppler E838, Eppler E874, Eppler E904, Eppler E908, and Speers H105. 36. The minimum cavitation, low-drag hydrofoil of claim 27, wherein said wings have a swept configuration. 37. The minimum cavitation, low-drag hydrofoil of claim 27, wherein said center body is adjustable, thereby allowing said center body to receive differently sized cavitation plates. 38. The minimum cavitation, low-drag hydrofoil of claim 27, wherein said securing device is non-invasive, thereby not damaging said cavitation plate. 39. The minimum cavitation, low-drag hydrofoil of claim 38, wherein said securing device compressively secures said center body to an edge of said cavitation plate. 40. The minimum cavitation, low-drag hydrofoil of claim 38, further comprising an additional securing device to supplement said securing device, wherein said additional securing device locks said center body about said cavitation plate. 41. The minimum cavitation, low-drag hydrofoil of claim 27, wherein the true hydrofoil shape includes at least two true hydrofoil shapes.

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Hydrofoil boat stabilizer

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