Abstract: The invention generally provides a dynamic back pressure regulator. In exemplary embodiments, the back pressure regulator includes an inlet, an outlet, a seat disposed between the inlet and the outlet and defining at least part of a fluid pathway, and a needle displaceable relative to the seat to form a restriction region therebetween for restricting fluid flow between the inlet and the outlet. In some embodiments, the needle can be formed of a chemically resistant ceramic or have a metal plating to provide corrosion and/or erosion resistance.

Abstract: An aircraft-galley chiller, enclosed in a housing, including an evaporator condensate drying device. The galley chiller may operate on DC power and may be transported from one cart to another to provide chilled air to a particular cart.

Abstract: An aircraft-galley chiller, enclosed in a housing, including an evaporator condensate drying device. The galley chiller may operate on DC power and may be transported from one cart to another to provide chilled air to a particular cart.

Abstract: An umbrella support apparatus is designed to engage a fence having a railing which is supported by a plurality of fence posts. A railing jaw receiver is positioned over the fence railing and a post clamp receiver is positioned below the jaw receiver and clamped to the fence posts. A strut is engaged between the jaw receiver and the clamp receiver with the jaw receiver providing a ring adapted for passing an umbrella pole through. The umbrella pole is then engaged with the clamp receiver which provides an umbrella pole terminal end engagement fixture for restraining the umbrella pole vertically and laterally.

Abstract: The present invention provides a method and apparatus for fraction collection from a chromatographic system. One or more substances of interest from a sample are collected in high concentration with high efficiency.