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US 4,508,046 AGranted
Wind surfing hydrofoil apparatus
AssigneeMichael P. Shannon
InventorsJames C. Coulter, Michael P. Shannon
Life of this patent
Estimating the term…
Abstract
Wind surfing hydrofoil apparatus for enabling hydroplaning of a wind surfing board having a mast mounted centrally thereon between a front end portion and a rear end portion of the board, and comprising a front hydrofoil mounted on the board in juxtaposition to the mast for hydroplaning support of the board; and a rear hydrofoil mounted on the board rearwardly of the mast for hydroplaning support of the board and releasable mounting apparatus for clamping engagement with the board and a dagger board attached to the board between the front hydrofoil and the rear hydrofoil and extending rearwardly within the rear hydrofoil.
Claims77
Wind surfing hydrofoil apparatus for enabling hydroplaning of a wind surfing board having a mast mounted centrally thereon between a front end portion and a rear end portion of the board, and comprising:
- a front hydrofoil means for being mounted below the bottom surface of the board on the side edges of the board in juxtaposition to the mast for hydroplaning support of the board;
- a rear hydrofoil means for being mounted below the bottom surface of the board on the side edges of the board rearwardly of the mast for hydroplaning support of the board;
- and
- each of the front and rear hydrofoil means comprises:
- a pair of inclined lift-out wing members of surface piercing and board lifting cross-sectional configuration extending outwardly and downwardly from and relative to the board beyond the side surfaces of the board;
- a pair of inclined flying wing members of surface piercing and board lifting cross-sectional configuration extending downwardly and inwardly relative to and from the lift-out wing members with outermost uppermost portions located outwardly beyond the side surfaces of the board and with innermost lowermost portions located inwardly beyond the side surfaces and below the bottom surface of the board;
- each flying wing member having an upper elongated portion of uniform cross-sectional size approximately equal to the cross-sectional size of said lift-out wing members and a lower elongated tapered portion of uniformly downwardly inwardly varying cross-sectional size terminating in a lower end portion of lesser cross-sectional size than said upper elongated portion;
- a generally vertically extending support strut member fixedly mounted inboard of each of said pair of flying wing members and each of the associated ones of said pair of lift-out wing members and having a lower end portion thereof fixedly supportively connected to each of the associated ones of said flying wing members and having an upper end portion thereof fixedly supportively associated with the board;
- and
- mounting means for rigid attachment of the hydrofoil means to the side edge surfaces of the board.
7 more elements
Wind surfing hydrofoil apparatus for enabling hydroplaning of a wind surfing board having a mast mounted centrally thereon between a front end portion and a rear end portion of the board, and comprising:
- a front hydrofoil means for being mounted below the bottom surface of the board on the side edges of the board in juxtaposition to the mast for hydroplaning support of the board;
- a rear hydrofoil means for being mounted below the bottom surface of the board on the side edges of the board rearwardly of the mast for hydroplaning support of the board;
- and
- each of the front and rear hydrofoil means comprises:
- a pair of inclined lift-out wing members of surface piercing and board lifting cross-sectional configuration extending outwardly and downwardly from and relative to the board beyond the side surfaces of the board;
- a pair of inclined flying wing members of surface piercing and board lifting cross-sectional configuration extending downwardly and inwardly relative to and from the lift-out wing members with outermost uppermost portions located outwardly beyond the side surfaces of the board and with innermost lowermost portions located inwardly beyond the side surfaces and below the bottom surface of the board;
- a generally vertically extending support strut member fixedly mounted inboard of each of said pair of flying wing members and each of the associated ones of said pair of lift-out wing members and having a lower end portion thereof fixedly supportively connected to each of the associated ones of said flying wing members and having an upper end portion thereof fixedly supportively associated with the board;
- mounting means for rigid attachment of the hydrofoil means to the side edge surfaces of the board;
- a pair of spaced fence members mounted on each of said flying wing members;
- one of said fence members being mounted on an upper portion of each of said flying wing members and being located at the water line during operation and having a configuration such as to prevent ventilation at hydroplaning speed;
- and
- the other of said fence members being mounted on the lower end portion of each of said flying wing members and having a configuration such as to prevent cavitation.
9 more elements
Wind surfing hydrofoil apparatus for enabling hydroplaning of a wind surfing board having a mast mounted centrally thereon between a front end portion and a rear end portion of the board, and comprising:
- a front hydrofoil means for being mounted below the bottom surface of the board on the side edges of the board in juxtaposition to the mast for hydroplaning support of the board;
- a rear hydrofoil means for being mounted below the bottom surface of the board on the side edges of the board rearwardly of the mast for hydroplaning support of the board;
- and
- each of the front and rear hydrofoil means comprises:
- a pair of inclined lift-out wing members of surface piercing and board lifting cross-sectional configuration extending outwardly and downwardly from and relative to the board beyond the side surfaces of the board;
- a pair of inclined flying wing members of surface piercing and board lifting cross-sectional configuration extending downwardly and inwardly relative to and from the lift-out wing members with outermost uppermost portions located outwardly beyond the side surfaces of the board and with innermost lowermost portions located inwardly beyond the side surfaces and below the bottom surface of the board;
- a generally vertically extending support strut member fixedly mounted inboard of each of said pair of flying wing members and each of the associated ones of said pair of lift-out wing members and having a lower end portion thereof fixedly supportively connected to each of the associated ones of said flying wing members and having an upper end portion thereof fixedly supportively associated with the board;
- and
- mounting means for rigid attachment of each of said hydrofoil means to the side edge surfaces of the board comprising:
- a clamp member mounted on the upper portion of each of said lift-out wing members and having a cross-sectional configuration corresponding to the cross-sectional configuration of the side portions of the board for clamping engagement with the upper and lower surfaces of the board member along the side portions of the board;
- and
- adjustable strap means extending across the board between each clamp member of each pair of lift-out wing members and being engageable with the upper or lower surface
- of the board for strapping the hydrofoil means to the board.
10 more elements
Wind surfing hydrofoil apparatus for enabling hydroplaning of a wind surfing board having a mast mounted centrally thereon between a front end portion and a rear end portion of the board, and comprising:
- a front hydrofoil means for being mounted below the bottom surface of the board on the side edges of the board in juxtaposition to the mast for hydroplaning support of the board;
- a rear hydrofoil means for being mounted below the bottom surface of the board on the side edges of the board rearwardly of the mast for hydroplaning support of the board;
- and
- each of the front and rear hydrofoil means comprises:
- a pair of inclined lift-out wing members of surface piercing and board lifting cross-sectional configuration extending outwardly and downwardly from and relative to the board beyond the side surfaces of the board;
- a pair of inclined flying wing members of surface piercing and board lifting cross-sectional configuration extending downwardly and inwardly relative to and from the lift-out wing members with outermost uppermost portions located outwardly beyond the side surfaces of the board and with innermost lowermost portions located inwardly beyond the side surfaces and below the bottom surface of the board;
- and
- a generally vertically extending support strut member fixedly mounted inboard of each of said pair of flying wing members and each of the associated ones of said pair of lift-out wing members and having a lower end portion thereof fixedly supportively connected to each of the associated ones of said flying wing members and having an upper end portion thereof fixedly supportively associated with the board;
- releasable clamping means for mounting each of the hydrofoil means on the board;
- each of said vertical support strut members having an upper end portion fixedly connected to an associated one of said releasable clamping means;
- each of said releasable clamping means comprising an elongated metallic plate clamp member having a generally C-shaped curved cross-sectional configuration corresponding to the cross-sectional configuration of the side edge portions of the board;
- and
- each of said releasable clamping means further comprising:
- a mounting block portion fixedly mounted on said elongated metallic plate clamp member;
- and
- the upper end portion of the associated lift-out wing member being fixedly attached to said mounting block portion.
13 more elements
Dependencies are inferred from the claim text.