Abstract: A fluid flow regulator in which fluid is passed through an impeller chamber having a pressure differential-operated impeller piston for monitoring changing inlet and outlet fluid pressures to maintain a constant fluid flow rate. A needle valve mounted on the body at one end of the impeller chamber engages an orifice opening to precisely change the fluid flow rate.

Abstract: A ratio mixing valve for mixing first and second fluids in a constant volumetric ratio regardless of variations of supply pressures of the two fluids. The valve has an inlet passage for the first fluid that passes through a spool valve chamber, and an inlet passage for the second fluid that also passes through the spool valve chamber. Vent passages connect the two fluid passages to the ends of the spool valve chamber. The spool valve has a pair of annular grooves aligned with the two inlet passages. One groove partially blocks one of the inlet passages to form a variable orifice that responds to pressure changes in the incoming fluids by moving the spool valve to a position which adjusts the volumetric flow through the two passages to maintain a constant ratio between the fluids in the mixture.

Abstract: A fluid-flow controller having an internal impeller. The impeller is reciprocally mounted within an orifice sleeve and has a peripheral surface engaging the sleeve forming a segment of an imaginary spherical surface.

Abstract: A fluid mixer providing improved fine mixing of a rough mixture of liquid and gas. The mixer includes a plurality of grooved annular plates defining an annular array of flow passages leading inwardly from a delivery space receiving the rough mixture to an inner central outlet space for discharging the fine mixture. The gas is introduced into the liquid to define the rough mixture in the form of an annular stream directed toward an inlet opening delivering the liquid to a mixing space. The rough mixture is delivered through a transfer space to the annular space about the fine mixer. The annular inlet space has a relatively large volume to provide a low flow rate therethrough to the fine mixer. Confronting grooves of the fine mixer plates may cross, and in the illustrated embodiment, the grooves of one face cross a plurality of grooves of the opposite face. The grooved plates may be arranged in aligned relationship or may be randomly disposed as desired.

Abstract: A readily disassembleable fluid flow rate controller arranged for facilitated sanitizing whereby the controller is adapted for use in controlling the flow rate of fluid food products and the like. The controller includes an adjustable orifice device and a spring-biased regulating device. The orifice and regulating devices are removably installed in a separable housing. Removable securing structure is provided to permit facilitated disassembly and assembly of the controller for facilitated sanitizing of the elements thereof.