Deadrise-altering adjunct for marine hull bottom
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
B63B-001/00
B63B-003/08
B63B-003/10
B63B-017/00
B63B-059/02
B63G-009/02
출원번호
US-0456268
(2009-06-08)
등록번호
US-8166903
(2012-05-01)
발명자
/ 주소
Demmelmaier, Allan W.
Jacobson, Donald R.
출원인 / 주소
The United States of America as represented by the Secretary of the Navy
대리인 / 주소
Kaiser, Howard
인용정보
피인용 횟수 :
1인용 특허 :
22
초록▼
As typically embodied, the present invention's add-on device includes two wedge-shaped structural components that are oppositely congruent and symmetrically connected. In profile, the device describes a pair of nearly triangular quadrilateral figures that are enantiomorphs (mirror images) with respe
As typically embodied, the present invention's add-on device includes two wedge-shaped structural components that are oppositely congruent and symmetrically connected. In profile, the device describes a pair of nearly triangular quadrilateral figures that are enantiomorphs (mirror images) with respect to the linear bisector (mirror line) at which they join. The device's V-angular upper surface defines the same V-angularity (“deadrise”) as does a V-angular hull bottom, the device thus fitting beneath the hull bottom. The device's V-angular lower surface defines a different angularity, which is imparted to the hull bottom when the device is attached thereto. According to typical inventive practice, the device alters the hull bottom's V-angularity by at least 1° and, at least, covers approximately 100% of the hull bottom's widthwise expanse along approximately 50% or more of the hull bottom's lengthwise expanse. The device modifies a marine vessel's hydrodynamics and/or hydrostatics, and may provide armor and/or wear benefits.
대표청구항▼
1. An apparatus comprising a double-wedge-shaped adjunct for a marine hull, said hull having a rigid V-angular hull bottom that is characterized by a first deadrise angle, a hull bottom length, and a hull bottom width, said adjunct having a V-angular upper adjunct surface and a V-angular lower adjun
1. An apparatus comprising a double-wedge-shaped adjunct for a marine hull, said hull having a rigid V-angular hull bottom that is characterized by a first deadrise angle, a hull bottom length, and a hull bottom width, said adjunct having a V-angular upper adjunct surface and a V-angular lower adjunct surface, said upper adjunct surface being characterized by the first said deadrise angle, said lower adjunct surface being characterized by a second said deadrise angle, said adjunct being made entirely of a rigid and noncompressible material and being characterized by a shape capable of resisting deformation, said upper adjunct surface being conformal with said hull bottom to maintain continuous flush attachment of said adjunct underneath at least a portion of said hull bottom whereby said adjunct is coextensive with at least approximately half said hull bottom length and at least in part is coextensive with approximately the entire said hull width for at least approximately half said hull bottom length, said hull bottom being changed by said flush attachment so as to be characterized by the second said deadrise angle, the second said deadrise angle differing from the first said deadrise angle and thereby imparting a substantially different hydrodynamic character. 2. The apparatus of claim 1, wherein said adjunct is detachable from said hull. 3. The apparatus of claim 1, wherein said flush mounting is permitted whereby said adjunct is coextensive with approximately the entire said hull length. 4. The apparatus of claim 1, wherein the second said deadrise angle differs at least two degrees from the first said deadrise angle. 5. The apparatus of claim 1, wherein the second said deadrise angle is at least two degrees greater than the first said deadrise angle. 6. The apparatus of claim 1, wherein the second said deadrise angle is at least two degrees less than the first said deadrise angle. 7. The apparatus of claim 1 further comprising said hull, the apparatus thereby comprising the combination of said hull and said adjunct wherein said adjunct is attachable to said hull. 8. The apparatus of claim 7, wherein said adjunct is detachable from said hull. 9. The apparatus of claim 7, wherein said flush mounting is permitted whereby said adjunct is coextensive with approximately the entire said hull length. 10. The apparatus of claim 7, wherein the second said deadrise angle differs at least two degrees from the first said deadrise angle. 11. The apparatus of claim 7, wherein the second said deadrise angle is at least two degrees greater than the first said deadrise angle. 12. The apparatus of claim 7, wherein the second said deadrise angle is at least two degrees less than the first said deadrise angle. 13. The apparatus of claim 1, wherein said adjunct extends behind said hull bottom a distance in the range between approximately three percent and approximately ten percent of said hull bottom length. 14. A deadrise-altering device for association with a marine hull that is characterized by a geometric longitudinal centerline and that has a rigid V-angular hull bottom surface, said hull bottom surface being characterized by a hull bottom length, a hull bottom width, and a hull bottom deadrise angle, the device comprising an adjunctive structure made entirely of a rigid and noncompressible material and characterized by a shape capable of resisting deformation, said adjunctive structure including a pair of wedge-shaped sections that are mirror-imaged with respect to a geometric plane of symmetry, said adjunctive structure having a V-angular upper adjunctive surface and a V-angular lower adjunctive surface, said upper adjunctive surface being characterized by an upper adjunctive deadrise angle that equals said hull bottom deadrise angle, said lower adjunctive surface being characterized by a lower adjunctive deadrise angle that differs from said hull bottom deadrise angle and that thereby imparts a substantially different hydrodynamic character, said adjunctive structure maintaining continuous flush attachment beneath said hull bottom surface so that said geometric plane is vertical, said geometric centerline lies in the vertical said geometric plane, and at least a portion of said upper adjunctive surface adjoins said hull bottom surface across approximately all of said hull bottom width and along at least half of said hull bottom length, the flushly attached said adjunctive structure effectively altering said hull bottom deadrise angle so as to become said lower adjunctive deadrise angle. 15. The deadrise-altering device of claim 14, wherein said upper adjunctive surface is characterized by an upper adjunctive width, and wherein said upper adjunctive width at least approximately equals said hull bottom width. 16. The deadrise-altering device of claim 15, wherein said upper adjunctive surface is characterized by an upper adjunctive length, and wherein said upper adjunctive length at least approximately equals said hull bottom length. 17. The deadrise-altering device of claim 14, wherein each said section of said adjunctive structure is tapered in a direction toward said geometric longitudinal plane, and wherein said lower adjunctive surface is characterized by a lower adjunctive deadrise angle that is at least two degrees smaller than said hull bottom deadrise angle. 18. The deadrise-altering device of claim 14, wherein each said section of said adjunctive structure is tapered in a direction away from said geometric longitudinal plane, and wherein said lower adjunctive surface is characterized by a lower adjunctive deadrise angle that is at least two degrees larger than said hull bottom deadrise angle. 19. The deadrise-altering device of claim 14, wherein said adjunct extends behind said hull bottom surface a distance in the range between approximately three percent and approximately ten percent of said hull bottom length. 20. A method for modifying the hydrodynamic character of a marine vessel, said marine vessel having a rigid V-angular hull bottom characterized by a deadrise angle, a hull bottom length, and a hull bottom width, the method comprising: providing an adjunct for said marine vessel, said adjunct being made entirely of a rigid and noncompressible material and being characterized by a shape capable of resisting deformation, said adjunct including a V-angular upper adjunct surface and a V-angular lower adjunct surface, said upper adjunct surface being characterized by an upper surface angularity that is equal to said deadrise angle, said lower adjunct surface being characterized by a lower surface angularity that is unequal to said deadrise angle; andconverting said hull bottom to a different said hull bottom, the different said hull bottom being characterized by a different said deadrise angle and thereby imparting a substantially different hydrodynamic character, said converting including mounting said adjunct onto said hull bottom so that said upper adjunct surface is continuously maintained flush with said hull bottom and said lower adjunct surface faces generally downward, said mounted adjunct being coextensive with at least approximately half of said hull bottom length and at least in part being coextensive with approximately all of said hull bottom width for at least approximately half of said hull bottom length. 21. The method for modifying of claim 20, wherein said lower adjunct surface is characterized by said lower surface angularity that is at least one degree higher or lower than said deadrise angle. 22. The method for modifying of claim 20, wherein said mounted adjunct is coextensive with approximately all of said hull bottom length. 23. The method for modifying of claim 20, wherein said hull bottom is characterized by said deadrise angle that is constant along said hull bottom length, and wherein the different said hull bottom is characterized by plural stations along said hull bottom length, said lower surface angularity varying between adjacent said stations, the different said hull bottom thereby being characterized by a different said deadrise angle that is variable along said hull bottom length.
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이 특허에 인용된 특허 (22)
Hamby William E. (HCR 64 ; Box 1036 Locust Grove OK 74352), Boat bottom protector.
Mason ; Jr. John E. (123 Circle Dr. ; East Montgomery IL 60538) Mason Kenneth J. (123 Circle Dr. ; East Montgomery IL 60538), Boat keel/hull protector.
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