Patent ID: 9637206
Date: 2017-05-02
CPC Classifications: B63B

Claim:
1. An adapter system for allowing a two-tabbed fin to be secured to a single-tabbed fin box, comprising a base unit, a two-tabbed fin, and a single-tabbed fin box, where the base unit is capable of fitting into the single-tabbed fin box, where the base unit comprises a front section, a back section, a bottom section, a top section, and two side sections, where the base unit additionally comprises two vertical slots, a front slot and a back slot, separated by a spacer, with each slot comprising two end sections, a bottom section, a back section and a front section, where the two end sections, the bottom section, the back section and the front section create a trapezoidal cavity in the base, where each of two trapezoidal cavities is capable of receiving a tab from the two-tabbed fin, and the spacer is slightly smaller than a space between two tabs from the two-tabbed fin, where the back section and the front section of each of the two vertical slots are set at a cant angle, where the cant angle projects a fin at an angle other than 90 degrees vertically from the top surface of the single-tabbed fin box, where the front section of the base comprises a front notch, where the front notch is located on the front section of the base, where the front notch has three angled faces, a first angled face that recedes back in a backwards direction from the top section of the base, a second angled face and protrudes in a forward direction, and a third angled face that recedes back in a backwards direction, where the first angled face is connected to the top section of the base and the second angled face, and the second angled face is connected to the first angled face and the third angled face, and the third angled face is connected to the second angled face and the bottom section of the base, and where the angle of the second angled face is 90 perpendicular to the angle of a threaded hole for single-tabbed fin box of the single-tabbed fin box, such that by screwing a fin box screw into the threaded hole for single-tabbed fin box of a single-tabbed fin box, a front end of the fin box screw can secure the second angled face and retain the base in the single-tabbed fin box, where the front section additionally comprises a lateral hole, where the lateral hole is threaded to receive a set screw, where the lateral hole extends from the front section to the front slot, such that once a tab from the two-tabbed fin is inserted into the front slot, the tab can be secured by tightening the set screw such that it presses against the tab, where the rear section of the base comprises a rear notch, where the rear notch extends from approximately ¼ the distance from the top section of the base to the bottom section of the base to ½ the distance from the top section of the base to the bottom section of the base, such that the rear notch mates with a retention member of the single-tabbed fin box, where the rear notch additionally comprises a lateral hole, where the lateral hole extends from the rear notch to the back slot, such that once a tab from the two-tabbed fin is inserted into the back slot, the tab can be secured by tightening the set screw such that it presses against the tab, where, when the two-tabbed fin is inserted in the base, the set screw in the front section and the set screw in the notch can be tightened to secure the two-tabbed fin into the vertical slots, and then the base can be inserted into the single-tabbed fin box, and the rear notch is slid around the retention member of the single-tabbed fin box, and the base is then pushed to a bottom of the single-tabbed fin box, and a fin box screw is inserted into a threaded hole of the single-tabbed fin box, where the fin box screw, when tightened, secures the second angled surface of the front section of the base unit to the single-tabbed fin box, thereby securing the two-tabbed fin in a single-tabbed fin box, where at least one of the side sections of the base has one or more cut-outs, where the one or more cut-outs comprises a rectangular hole in the at least one side section of the base.