Windsurfing catamaran with dynamic shock dampened rig centering keel and hull support
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
B63H-009/00
B63B-001/10
출원번호
US-0279666
(2002-10-23)
§371/§102 date
20040713
(20040713)
발명자
/ 주소
Petrovich, Enrique
인용정보
피인용 횟수 :
5인용 특허 :
8
초록▼
A windsurfing catamaran with a self-stabilizing wing. The wing is moved to the correct position by counter balancing water pressure from a rotating central keel connected to a central mast. The keel rotates in the opposite direction of the wing when the wing is moved off center by wind. The keel rot
A windsurfing catamaran with a self-stabilizing wing. The wing is moved to the correct position by counter balancing water pressure from a rotating central keel connected to a central mast. The keel rotates in the opposite direction of the wing when the wing is moved off center by wind. The keel rotates such that a greater surface area is presented to water flow striking the keel. Water pressure on the keel offsets wind pressure on the sails and returns the keel and mast back to an upright position. This increases stability, lift, driving force, and speed. A central catamaran platform provides hinged struts and shock absorbers between the rear end of the central platform and planing hulls to reduce impact damage. The hinged struts and shock absorbers reduce water drag and the braking effect of repeated hull impacts with water resulting in a further increase in speed.
대표청구항▼
1. A windsurfing catamaran, further comprising:a central deck assembly; at least a first and second hull, the first hull and the second hull substantially parallel to one another and separated by the central deck assembly; an unstayed mast assembly attached to the central deck assembly between the t
1. A windsurfing catamaran, further comprising:a central deck assembly; at least a first and second hull, the first hull and the second hull substantially parallel to one another and separated by the central deck assembly; an unstayed mast assembly attached to the central deck assembly between the two hulls; and a central keel attached to the unstayed mast assembly and extending in a downward direction from the unstayed mast assembly, the central keel cooperatively connected to the unstayed mast assembly such that it moves with movement of the unstayed mast assembly; one or more wings attached to the unstayed mast assembly, the wings secured to the unstayed mast assembly such that they provide thrust under pressure of wind to move the catamaran; and the unstayed mast assembly further having means to tilt independently of the hulls in response to pressure from the wings, such that the hulls position is substantially independent of changes in orientation of the mast assembly; counter rotation means, the counter rotation means movably attaching the central keel to the unstayed mast assembly such that when the unstayed mast assembly is rotated under wind pressure away from a central position toward one side of the catamaran, the central keel is rotated toward the other side of the catamaran such that the flat side surface of the central keel is moved into the path of oncoming water flow, the oncoming water flow applies pressure against the central keel to move it back toward the central position; a central spar attached substantially along its longitudinal length to the wings, and attached at one end to the distal end of a mast support bar via an elevational pivot point, the central spar further having a rotational pivot point to allow the spar to rotate in response to shifts in wind pressure applied by the wings; the mast support bar further being pivotably attached to the central deck assembly such that rotation of its distal end in one direction will cause its proximal end to rotate in the same direction; a mast, the mast slidably attached at its upper end to the center spar such that the central spar can rotate under wind pressure applied via the wings, the mast attached at its lower end to the central keel, and the mast further having a mast aperture through which the mast support bar is slidably inserted and retained; whereby the unstayed mast assembly and the keel move in cooperation with one another, and the hulls are not pulled from the water when the wings are moved by wind pressure, and pressure from oncoming water flow is applied to the central keel to move it back toward a central position, and the central keel applies pressure to the unstayed mast assembly to simultaneously move it back to the central position, and the central spar can slidably rotate in relation to the mast and the mast can slidably and rotationally move in a forward and backward direction along a portion of the mast support bar. 2. A windsurfing catamaran, as in claim 1, wherein:the central deck assembly is pivotably attached on its starboard side to the first hull and pivotably attached on its port side to the second hull; a first shock absorbing means attached between the first hull and the starboard side of the central deck assembly, and a second shock absorbing means attached between the second hull and the port side of the central deck assembly; the first shock absorbing means providing force against the first hull such that pressure is applied to the first hull to maintain its best position in response to changes in the water surface caused by waves to stabilize the wing, mast, keel and central deck assembly, and the second shock absorbing means providing force against the second hull such that pressure as applied to the second hull to maintain its best position in response to changes in the water surface caused by waves to stabilize the wing, mast, keel and central deck assembly; whereby the first and second shock absorbing means provide independent control over the position of the first and second hulls, respectively, to stabilize the wing, mast, keel and central deck assembly. 3. A windsurfing catamaran, further comprising:a central deck assembly; at least a first and second hull, the first hull and the second hull substantially parallel to one another and separated by the central deck assembly; the central deck assembly pivotably attached on its starboard side to the first hull and pivotably attached on its port side to the second hull; an unstayed mast assembly attached to the central deck assembly between the two hulls; and a central keel attached to the unstayed mast assembly and extending in a downward direction from the unstayed mast assembly, the central keel cooperatively connected to the unstayed mast assembly such that it moves with movement of the unstayed mast assembly; a first shock absorbing means attached between the first hull and the starboard side of the central deck assembly, and a second shock absorbing means attached between the second hull and the port side of the central deck assembly; and the first shock absorbing means providing force against the first hull such that pressure is applied to the first hull to maintain its best position in response to changes in the water surface caused by waves to stabilize the wing, mast, keel and central deck assembly, and the second shock absorbing means providing force against the second hull such that pressure is applied to the second hull to maintain its best position in response to changes in the water surface caused by waves to stabilize the wing, mast, keel and central deck assembly; counter rotation means, the counter rotation means movably attaching the central keel to the unstayed mast assembly such that when the unstayed mast assembly is rotated under wind pressure away from a central position toward one side of the catamaran, the central keel is rotated toward the other side of the catamaran such that the flat side surface of the central keel is moved into the path of oncoming water flow, the oncoming water flow applies pressure against the central keel to move it back toward the central position; a central spar attached substantially along its longitudinal length to the wings, and attached at one end to the distal end of a mast support bar via an elevational pivot point, the central spar further having a rotational pivot point to allow the spar to rotate in response to shifts in wind pressure applied by the wings; the mast support bar further being pivotably attached to the central deck assembly such that rotation of its distal end in one direction will cause its proximal end to rotate in the same direction; a mast, the mast slidably attached at its upper end to the central spar such that the central spar can rotate under wind pressure applied via the wings, the mast attached at its lower end to the central keel, and the mast further having a mast aperture through which the mast support bar is slidably inserted and retained; whereby the first and second shock absorbing means provide independent control over the position of the first and second hulls, respectively, to stabilize the wing, mast, keel and central deck assembly, and the hulls are not pulled from the water when the wings are moved by wind pressure, and pressure from oncoming water flow is applied to the central keel to move it back toward a central position, and the central keel applies pressure to the unstayed mast assembly to simultaneously move it back to the central position, and the central spar can slidably rotate in relation to the mast and the mast can slidably and rotationally move in a forward and backward direction along a portion of the mast support bar. 4. A windsurfing catamaran, as in claim 3, further comprising:the first shock absorbing means includes a shock absorber and a stabilizer strut; and the second shock absorbing means includes a shock absorber and a stabilizer strut. 5. A method of stabilizing a windsurfing catamaran, including the steps of:attaching an unstayed mast assembly to a windsurfing catamaran having at least two hulls such that changes in wind direction and/or wind speed will move the mast assembly away from a central position in relation to the catamaran hulls; using a central keel which is attached to the mast assembly such that when the mast assembly is moved away from the central position, the central keel is rotated such that it is moved into water flow under the catamaran and pressure from the water flow pushes the keel and the central mast assembly back toward the central position; controlling movement of the central keel in relation to the unstayed mast assembly by attaching the central keel to the mast such that the mast is slidably and rotationally attached to a mast support bar to provide lateral pivoting, and attaching the mast support bar to a central deck assembly such that the mast and keel move rotationally about a central pivot point such that when the unstayed mast assembly moves to one side of the catamaran, the keel moves to the opposite side of the catamaran; and the central keel, when rotated from the central position under, wind pressure applied to the unstayed mast assembly, is moved under pressure from water flowing under the windsurfing catamaran back toward the central position; pivotably attaching a central deck assembly to opposing hulls on the windsurfing catamaran such that each of the hulls can pivotably move in relation to the central deck; attaching the wings to a central spar substantially along the longitudinal length of the central spar such that movement of the wings will be directly translated to the central spar; rotatably attaching the central spar to a pivot point such that the wings can rotate in relation to the pivot point; attaching a mast support bar to the pivot point and further attaching the mast support bar to a rotational pivot point to allow the mast support bar and the central spar to rotate in relation to the hulls in response to shifts in wind pressure applied by the wings; whereby movement of the mast assembly away from a stable central position by wind pressure is at least partially counter balanced by water pressure applied against the movable central keel which moves in the opposite direction of the central mast assembly, and the central keel is rotated in relation to the central mast assembly such that when the central mast assembly is moved away from the direction of movement of the catamaran, water pressure under the catamaran forces the keel and the central mast assembly back towards a central position, and wind changes will cause the central spar to slidably rotate in relation to the hulls and rotationally move the keel into the flow of oncoming water. 6. A method, as in claim 5, including the additional step of:using shock absorbing means to attach a point on each of the hulls to a corresponding point on the central deck assembly such that, when the hulls move in relation to the deck assembly, the shock absorbing means will move the hulls independently to the best position in relation to water flowing under the windsurfing catamaran to stabilize the central deck assembly; whereby the position of each hull in regard to the surface of the water and deck assembly is independently maintained by the shock absorbing means. 7. A method, as in claim 6, including the additional step of:using a combination of shock absorbers and struts to form the shock absorbing means.
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