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US 8,944,872 B2Granted
Surfboard fin for generating surfboard lift and method of use
OwnerMark Aaron Hill, Andrew Steven Hillinventors
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OwnerMark Aaron Hill, Andrew Steven Hillinventors
Estimating the term…
The present invention relates to a lifted fin apparatus comprising one or more lifted fin elements with foiled tin components for a reduction of pressure and drag and an increase in surfboard lift as well as a method of achieving surfboard lift through, the use of said apparatus. Generally, the lifted fin apparatus comprises two or more lifted fin elements exhibiting a foil design on one or more of the fin surfaces. The individual fin elements may comprise a substantially vertical fin attached to a first edge of a base member and oriented at a substantially 90° angle in relation to the bottom surface of the surfboard or to the first edge of the base member. The fin elements may further comprise an angular fin mounted to a second edge of the base member at one end and the lower portion of the first, fin at the other end. In said embodiment, a bend or elbow is formed between a first fin component of angular fin and base member proximate the point of attachment at second edge of base member. Alternatively, the base member may not have a defined second edge representing the intersection between base member and a first fin component of angular fin, but rather the base member and the angular fin may be manufactured as a unitary structure with a bend or elbow between base member and a first fin component as described below.
A lifted fin apparatus for attachment to the underside of a surfboard, the lifted fin apparatus comprising at least one lifted fin element wherein said lifted fin element comprises a base member having at least a first edge, a first fin mounted to the first edge of the base member, and a second fin comprising a first fin component and a second fin component, and a first elbow between base member and first fin component and a second elbow between first fin component and second fin component, wherein said second fin component is affixed to said first fin.
A lifted fin apparatus for attachment to the underside of a surfboard, the lifted fin apparatus comprising two lifted fin elements wherein said lifted, fin elements each further comprise a base member having a first edge and a second edge, a substantially vertical first fin affixed to the first edge of the base member with a convex face facing the outer edge of said surfboard, and a substantially angular second fin having a first edge, second edge, a first fin component and a second fin component, wherein first fin component extends from said second edge of base member at a predetermined angle to said first fin and said second fin component extends from said first fin component at predetermined angle to said first fin and wherein said first edge of the second fin is affixed to the second edge of the base member and the second edge of the second fin is affixed to the first fin below the base member.
A method of achieving surfboard lift comprising the steps of attaching at least one lifted fin element to the underside of a surfboard said lifted fin element comprising a base member having at least a first edge, mounting a first fin to the first edge of the base member, and mounting a second fin comprising a first fin component and a second fin component, and a first elbow between base member and first fin component and a second elbow between first fin component and second fin component, and adjusting a plug system of the lifted fin element to the desired performance of the user.
Dependencies are inferred from the claim text.