초록 ▼

A watersport board fin has a rigid body element with a leading edge and trailing edge, and a rigid ridge integral with rigid body and extending outwardly from the leading and trailing edges. The ridge has a number of through extending holes formed in it outwardly of the rigid body element, and has a

A watersport board fin has a rigid body element with a leading edge and trailing edge, and a rigid ridge integral with rigid body and extending outwardly from the leading and trailing edges. The ridge has a number of through extending holes formed in it outwardly of the rigid body element, and has an average thickness of about 16-25% (e.g. 18-22%) of the average thickness of the body element, preferably between about 0.1-0.14 cm (e.g. about 0.12 cm). The ridge is substantially completely covered by a flexible material soft enough to minimize injury to a person impacted by it, and flexible enough to be deflected during movement through the water to provide a rudder action. Preferably the flexible material extends along substantially the entire extent of the rigid body element, including the base of the body element, thereby enhancing the safety and rudder performance of the fin. The fin is connected to the bottom surface of a sport board, such as a surfboard, wake board, sail board, water ski, body board, etc. near the rear. The fin may be releasably attached to the board.

대표청구항 ▼

[ What is claimed is:] [1.] A watersport board fin comprising:a rigid body element having a leading edge and a trailing edge, and an average thickness;a rigid ridge integral with said rigid body and extending outwardly from said leading and trailing edges;a plurality of through-extending holes forme

[ What is claimed is:] [1.] A watersport board fin comprising:a rigid body element having a leading edge and a trailing edge, and an average thickness;a rigid ridge integral with said rigid body and extending outwardly from said leading and trailing edges;a plurality of through-extending holes formed in said ridge outwardly of said rigid body element;a flexible material covering which substantially completely covers said ridge of said rigid body element along said leading and trailing edges, and extends through said holes formed in said ridge to mechanically lock said flexible material to said ridge, said flexible material being soft enough to minimize injury to a person impacted by a leading or trailing edge of said fin, and being flexible enough to be deflected during movement through water to provide a rudder, anti-cavitation, action; andwherein said rigid body element comprises a base, a tip, and side faces; and wherein said side faces have an uneven contour at said ridge so that said ridge extends outwardly from said rigid body element widely varying distances along the extent thereof.