Abstract: A centrifuge bowl for separating heavier particles from lighter particles and water comprises a first conical bowl wall leading to a pair of annular recesses at actually spaced positions. Each recess is generally re-shaped with an upper side wall, a lower side wall and a base. The base contains a plurality of angularly spaced discharge ducts each having a mouth projecting through the base into the interior of the bowl for collecting the heavier particles. A pinch valve is formed as an integral assembly with the mouth and duct and is mounted within a housing carried within the wall of the bowl. The housing, valve and duct can therefore be removed as a separate assembly by pulling from a chamber within the wall of the bowl. A compression fluid supply duct passes through the wall to communicate with the chamber.

Abstract: A tent structure convertible from a hanging tent to a ground-based tent is herein described. The tent structure includes a top portion having slots, T-shaped connectors stitched into the base portion and resilient rods having ends arranged to be inserted into either the slots or the T-shaped members. For use as a hanging tent, the ends of the resilient rods are inserted into connectors on opposite sides of the tent such that the resilient rods extend across the base portion of the tent and the tent is then hung from support structure(s). As a result of this arrangement, the base of the tent is firmly supported by the resilient rods and the tent is supported above the ground. For use as a ground-based tent, the connectors are pivoted such that the connectors are adjacent to the sides of the tent and the resilient rods are inserted one end into a connector and a second end into a slot such that the resilient rods extend along the sides of the tent and support the top portion of the tent above the ground.