Abstract: Method and apparatus for separating components of a slurry comprising solid particles and liquid components, particularly where the slurry is under pressure. The components are separated in a hydrocyclone such that a solids-enriched slurry exits the separator via an underflow outlet while a solids-depleted slurry exits the separator through an overflow outlet and passes into a products vessel. Fluid communication is provided between the products vessel and the underflow outlet so that gas can circulate through the hydrocyclone. This gas circulation pathway may be achieved by enclosing the separation system in a housing or providing a gas circulation conduit between the products vessel and the underflow outlet of the separator or an optional solids vessel connected to the underflow outlet. Pressure within the separator apparatus may be adjusted and controlled at a negative, neutral or positive pressure while operating the hydrocyclone in balanced mode to achieve efficient separation.

Abstract: An adjustable wooden studio bench has four legs, the upper portions of which are connected by a pair of horizontal top rails provided with vertical openings through which the legs extend. A horizontal footrest rail like the top rails is mounted on the lower portions of the legs. The front legs are connected with the back legs by means of cross bars with vertical openings for the legs. The cross bars may support a tray. Each rail and bar has a vertical slot through each end extending from the opening out through the adjacent end to form a pair of horizontally spaced jaws that are drawn toward each other by a fastener extending through them to clamp the rails and bars to the legs. When the fasteners are loosened, the rails and bars can be moved vertically on the legs. The top rails support a seat that is slidable lengthwise of them.