Patent ID: 7997370

Claim:
A coupling system for connecting individual units of a multi-unit aquatic vehicle, the vehicle comprising: a plurality of individual units forming a unit for continuous movement in an aquatic environment, first and second ones of the individual units collectively providing a coupling system for attaching one end of the first unit directly to one end of the second unit, wherein the coupling system comprises a hinge pin system including a pin portion integrally attached to the one end of the first unit and pin receiving portions integrally attached to the one end of the second unit, the pin receiving portions providing a pair of receiving sections, the pin inserting portion having a plurality of pins each insertable into one of the receiving sections, the coupling system including at least one convex male portion protruding from the one end of one of the first and second units and at least one concave female portion provided at the one end of the other of the first and second units, the one end of the first unit and the one end of the second unit configured so that the convex male portion can be received within the concave female portion in a sliding relationship with the concave female portion, wherein: the convex male portion is movable about the concave female portion and the first unit is thereby movable with respect to the second unit when the first and second units are connected together by the coupling system.