Patent ID: 8640640
Filing Date: 2014-02-04
Classification: B63B

Abstract:
1. In a watercraft having first and second spaced apart and parallel inflatable hulls supporting a central body on legs there between and above the inflatable hulls, the improvement comprising: each inflatable hull having a longitudinal structural member extending over the top of the inflatable hull and fastened thereto; the body being supported with respect to each inflatable hull by a stern leg and a forward leg; the forward legs being coupled to the central body to allow at least a limited rotation of the forward legs as a unit with respect the central body; a lower end of each forward leg being coupled to a forward part of a respective longitudinal structural member through a spring mounted ball joint; an upper end of each stern leg being rigidly coupled to the central body; a lower end of each stern leg being coupled to a rear part of a respective longitudinal structural member through a joint that allows at least limited rotation about a vertical axis and about a horizontal axis perpendicular to a length of a respective longitudinal structural member, but not about an axis parallel to the length of the respective longitudinal structural member; wherein the stern legs are each coupled to a rear part of a respective longitudinal structural member through a ball joint assembly that allows at least limited rotation about a vertical axis and about a horizontal axis perpendicular to the length of a respective longitudinal structural member, the ball joint assembly including apparatus preventing rotation about an axis parallel to the length of the respective longitudinal structural member.