Abstract: A building element suitable for use in supporting model building sets. The building element is configured to be removably secured to a plurality of like or similar building elements to form a modular substructure for supporting model building sets. To that end, the building element may include a plurality of connector fitting arrangements disposed on the surfaces of the building element. In one embodiment, the building element is configured to be separable into half-sections and quarter-sections.

Abstract: The present invention relates to an apparatus for attaching a pontoon to a watercraft. There is provided an a first quick-coupler adapted to be connected to the pontoon and a second quick-coupler, complemental with the first quick-coupler. adapted to be connected to the hull, wherein the first and second quick-couplers together have at least three of the following: (i) lugs that close back on themselves to form one of an open loop and a closed loop, (ii) multiple lugs arranged in a triangle, (iii) both a fixed hook and a latch, (iv) two hooks that engage the same lug and (v) two non-parallel hooks that engage the same lug.

Abstract: A vacuum cleaner current-carrying hose connection system is disclosed having a female connection end on a first vacuum cleaner current-carrying hose adapted for receiving a male connection end on a second vacuum cleaner current-carrying hose. The male connection has at least two male receptor plugs configured for inserting into female receptor holes in the female connection end. A vacuum cleaner hose connection system is further disclosed having a male connection end that has at least two male receptor plugs for transmitting current, a female connection end having at least two female receptor holes for receiving the male receptor plugs, and the male and female connection ends being rotatably movable, about the longitudinal axis of at least one of the female connection end and the male connection end, between an unengaged position and an engaged position.