초록 ▼

A fin box for releasable attachment of a fin having at least one fin-tab, the fin box adapted for insertion into and retention within a water board, the fin box including: a generally elongate body provided with a substantially rectangular recess open at a first surface of the body, the recess exten

A fin box for releasable attachment of a fin having at least one fin-tab, the fin box adapted for insertion into and retention within a water board, the fin box including: a generally elongate body provided with a substantially rectangular recess open at a first surface of the body, the recess extending to a base proximal to a second surface opposite the first surface, and the recess having a forward end and a rearward end; wherein the structure is provided with at least one angled threaded hole extending from the first surface of the body to emerge at a point within the recess between the first surface and the base of the recess.

대표청구항 ▼

What is claimed is: 1. A method for releasable attachment of a fin of a water board, said method including: (a) providing at least a fin box embedded in said water board, said fin box comprising an elongate body with a recess longer than a length of a portion of the fin to be inserted into the rece

What is claimed is: 1. A method for releasable attachment of a fin of a water board, said method including: (a) providing at least a fin box embedded in said water board, said fin box comprising an elongate body with a recess longer than a length of a portion of the fin to be inserted into the recess, said recess open at a first surface if the elongate body, and said fin box further including a flange extending outwardly from the elongate body and proximate to the first surface, a buttress extending from the flange to a side of the elongate body and an angled threaded hole extending through the first surface, the buttress and the side of the elongate body, (b) withdrawing a screw provided in the angled threaded hole in said fin box to allow insertion of said portion of the fin into said recess, (c) adjusting the fin forward or aft in the recess to position the portion of the fin in the recess; (d) driving said screw into contact with the portion of the fin while said fin is in the recess. 2. A fin box for a water board, said fin box comprising: a generally elongate body provided with a substantially elongated recess open at a first surface of said body; a peripheral flange extending outwardly from said elongate body at said first surface; a buttress along at least one side of said elongate body, the buttress forming a projecting abutment between said flange and said at least one side of said elongate body; an angled hole extending through the flange, the buttress and the side of said elongate body, and a shaft seated in the angled hole and adapted to abut a side of a fin inserted in the recess of the fin box, wherein the shaft secures the fin to the fin box when seated in the angled hole and abutting the fin. 3. A fin box as in claim 2 wherein the peripheral flange is at least partially recessed below a finished bottom surface of the water board when the fin box is mounted in the water board. 4. A fin box as in claim 2 wherein the angled hole has threads to receive threads on the shaft. 5. A fin box as in claim 2 further comprising a removable insert having an outer shape adapted to fit snugly in the recess and having a receiving surface adapted to receive a first type of fin, wherein the insert further comprises an opening which is aligned with the angled hole when the insert is in the recess to allow the shaft to abut against the first type of fin. 6. A fin box for a water board, said fin box comprising: a generally elongate body provided with a substantially elongated recess open at a first surface of said body, wherein the recess is adapted to receive an end portion of a fin; a peripheral flange extending outwardly from said elongate body at said first surface; a buttress along a side of said elongate body, the buttress extending between the flange and the side of said elongate body; an angled hole extending through the first surface, the flange, the buttress and the side of said elongate body, and a shaft seated in the angled hole and adapted to abut a side of an fin inserted in the recess of the fin box, wherein the shaft secures the fin to the fin box and water board when seated in the angled hole and abutting the fin. 7. A fin box as in claim 6 wherein the elongated recess is substantially longer than the end portion of the fin to allow the fin to be positioned for and aft in the recess before the shaft secures the fin to the fin box. 8. The fin box of claim 6 adapted to form at least one of: a right hand fin box for retaining a fin at a right hand side of said water board and a left hand fin box for retaining a fin at a left hand side of said water board, and wherein at least one side wall of said recess of each of said fin box is provided with at least a portion of an outwardly sloping wall section. 9. The fin box of claim 6 wherein said fin box is of a length and width sufficient to support said fin entirely so that no portion of said fin is in contact with said body of said water board. 10. The fin box of claim 6 wherein said fin box further comprises a peripheral flange to be seated in a bottom surface of the board. 11. The fin box of claim 10 further comprising a buttressing rib extending between the peripheral flange and an outer sidewall of the body. 12. A fin box as in claim 6 wherein the peripheral flange is substantially orthogonal to the recess in the fin box and the buttress is a triangular section substantially orthogonal to the recess and the flange. 13. A fin box as in claim 6 wherein the peripheral flange is at least partially recessed below a finished bottom surface of the water board when the fin box is mounted in the water board. 14. A fin box as in claim 6 wherein the angled hole has threads to receive threads on the shaft. 15. A fin box as in claim 6 further comprising a removable insert having an outer shape adapted to fit snugly in the recess and having a receiving surface adapted to receive a first type of fin, wherein the insert further comprises an opening which is aligned with the angled hole when the insert is in the recess to allow the shaft to abut against the first type of fin. 16. A method for releasable attachment of a fin to a water board, wherein the water board includes an embedded fin box having an elongate body with at least one elongated recess open at a first surface of the body, a flange extending outwardly from said elongate body, a buttress between the flange and a side of the elongate body and an angled hole extending through the first surface, the flange, the buttress and the side, the method comprising: inserting an attachment portion of the fin into the recess in the fin box; adjusting the fin relative to the board by shifting the attachment portion forward or aft in the at least one elongated recess of the fin box; inserting a rod into the angled hole, whereby the rod moves sequentially through the flange, buttress and the side of the elongate body, and securing the fin in the fin box by advancing the rod in the angled hole to apply a bias force between a distal end of the rod and the attachment portion of the fin, wherein the bias force prevents forward and aft movement of the fin in the fin box. 17. The method of claim 16 wherein the rod includes at least one set-screw and: the step of adjusting the fin includes retracting the at least one set-screw provided in the angled hole, wherein the angled hole is threaded and the set-screw is retracted a distance sufficient to allow insertion of the attachment portion of the fin into the recess, and the step of securing the fin includes advancing the set-screw into contact with the attachment portion of the fin inserted in the fin box. 18. The method of claim 16 wherein the recess is elongated in a direction generally parallel to a longitudinal axis of the water board, and the recess is narrow in a direction perpendicular to the longitudinal axis of the board and wide along the longitudinal axis, and wherein: the adjustment step includes sliding the attachment portion of the fin forward or aft along the longitudinal axis, and the securing step includes advancing the rod into contact with the attachment portion along the direction perpendicular to the longitudinal axis. 19. The method of claim 16 wherein the attachment portion of the fin includes at least one fin tab and the adjusting step includes sliding the at least one fin tab forward or aft in the recess of the fin box. 20. The method of claim 16 wherein the attachment portion of the fin includes a plurality of fin tabs and: the adjusting step includes sliding the fin tabs forward or aft in the recess of the fin box, and the securing step includes advancing a plurality of rods each extending through a respective one of an angled hole and each rod biases against a respective one of the fin tabs. 21. A method for releasable attachment of a fin to a water board, wherein the water board includes an embedded fin box, the method comprising: embedding a fin box with an elongated recess in a board surface said water board such that a peripheral flange extending outwardly from said elongate body is adjacent the board surface and a buttress rib extending between the flange and a side of the elongate body extends into the water board in a direction generally perpendicular to the board surface; after embedding the fin box, inserting rod into an angled hole wherein the angled hole extends through the flange, the buttress and the side of the elongate body to open to the recess; inserting an insert into the recess; inserting an attachment portion of the fin in the recess of the fin box, wherein at least a portion of the insert is sandwiched between the attachment portion and an inner sidewall of the recess; longitudinally moving the fin in the fin box, while the shaft is not securing the attachment portion to the fin box, and securing the fin in the fin box by advancing the rod in the angled hole to bind the attachment portion and the insert against the sidewall. 22. The method of claim 21 wherein longitudinally moving the fin includes sliding the attachment portion forward or aft with respect to the fin box when the insert is inserted in the recess and while the insert is held by the rod to prevent forward and aft movement of the insert in the recess. 23. The method of claim 21 wherein the angled hole includes a pair of angled holes extending through buttresses on opposites sides of the recess, and securing the fin includes advancing the rod in each of the angled holes to bind the attachment portion from opposite sides of the recess. 24. The method of claim 21 wherein securing the fin includes supporting the attachment portion of the fin with the insert to minimize movement of the attachment portion in a direction perpendicular to a longitudinal axis of the fin box. 25. A fin box for a water board comprising: an elongate body having an elongated recess open at a first surface of said body, wherein the recess is adapted to receive an end portion of a fin and the recess is substantially longer than the end portion of the fin; a peripheral flange extending outwardly from said elongate body at said first surface, at least one buttress on a side of elongate body wherein the buttress forms a projection abutment between the flange and the side of said elongate body; an angled hole extending through the flange, the buttress and the side of said elongate body to emerge at the recess, and a shaft seated in the angled hole and adapted to abut a side of the end portion of the fin inserted in the recess of the fin box, wherein the shaft secures the fin to the fin ox and the water board when seated in the angled hole and abutting the fin, and an insert releasably secured in the elongated recess, said insert having a first side abutting an inner side wall of the elongated recess and a second side adapted to abut a side of the end portion of the fin. 26. The fin box for a water board as in claim 25 wherein the insert includes an opening through which the shaft extends. 27. The fin box for a water board as in claim 25 wherein the insert includes a sidewall and a thickness of the sidewall is tapered such that, while the end portion of the fin abuts the insert, the fin slants in the water board. 28. The fin box for a water board as in claim 25 wherein the insert is selected from a group including: a first insert having vertical parallel sidewalls adjacent a sidewall surface adapted to abut the attachment portion of the fin, and a second insert having at least one vertically tapered sidewall adjacent a sidewall surface adapted to abut the attachment portion of the fin. 29. A fin box for a water board comprising: a generally elongate body provided with a substantially elongated recess open at a first surface of said body, wherein the recess is adapted to receive an end portion of a fin, said recess is substantially longer than the end portion of the fin; a peripheral flange extending outwardly from said elongate body at said first surface; at least one buttress on a side of elongate body extending between the side and the flange; an angled hole extending through the flange, the buttress and the side of said elongate body, and a shaft seated in the angled hole and adapted to abut a side of the end portion of the fin inserted in the recess of the fin box, wherein the shaft secures the fin to the fin box and the water board when seated in the angled hole and abutting the fin; at least one sidewall of the elongated recess having a tapered portion to slant the attachment portion of the fin outwardly toward an outside rail of the water board; an angled hole extending through the first surface and a side of said elongate body, and a shaft seated in the angled hole and adapted to abut a side of a fin inserted in the recess of the fin box, wherein the shaft advances through the angled hole and abuts the side of the attachment portion of the fin located within the sloping portion of the recess.