US Patent 8490335 Removable seats system

The removable seats system has a first vertically movable platform defining opposite upper and lower sides, a seat member comprising at least one seat and first and second complementary male-female engagement members respectively provided on the first platform and on the seat member. The seat member may be removably installed in an operative position on the upper side of the first platform through a releasable engagement of the first and second male-female engagement members with one another.