Abstract: Apparatus is described for controlling the volumes of water and headspace air in a water storage/delivery tank of an individual water well system that includes a pump for maintaining water within the storage/delivery tank and for maintaining the pressure in the tank within preselected limits. The apparatus enables the water level within the tank to be assessed, the air pressure within the tank to be assessed, and the respective volumes of headspace air and water within the tank to be adjusted independently of the pump. Three versions of the apparatus are described: a manually operated system, a semi-automatic system, and a fully automatic system. Use of the apparatus overcomes problems associated with the absorption of the air within the tank and resultant water-logging of the tank. Once this occurs, the pump is caused to switch on and off to an excessive extent.

Abstract: The liquefaction process comprises the stages of pre-cooling (3) the gas, of cooling it by heat exchange (6, 7, 8) and by fractional expansion (10, 11), under supercritical conditions, then of expanding it in a turbine (9) which delivers a volume of subcooled liquid (2). The process is especially applicable to the refrigeration of superconductive elements.

Abstract: An expansion chamber is attached between two air compression stages of an air compressor or between an air compression stage and the air holding tank of the air compressor. The expansion chamber has a cylindrically shaped wall with top and bottom portions attached so as to define an enclosed inner chamber. The enclosed inner chamber may have one or more baffle plates located therein. Various designs of baffle plate arrangements provide different air circulating patterns within the expansion chamber. Since the expansion chamber is exposed to the ambient environment, the compressed air heated in the compression process is cooled down in the expansion chamber. This cooling down of the compressed air as well as the expansion of the compressed air as it circulates within the enclosed inner chamber causes any moisture suspended in the compressed air to drop out and go to the bottom of the expansion chamber.

Abstract: The manual valve normally attached to the wet tank of an air pressure system in a motor vehicle which accumulates moisture is replaced by an automatic valve which has an inlet port connected to the drain line from the wet tank and an outlet port vented to the atmosphere. This valve is operable between an open position where the inlet and outlet ports are interconnected and a closed position where these two ports are isolated from each other. An air line which is used to activate the valve is interconnected to the parking brake of the motor vehicle and is operable to move the valving means to the closed position during normal operation of the vehicle and to the open position whenever the parking brake is engaged to thereby automatically drain moisture from the wet tank while the vehicle is parked.

Abstract: Net oil production from a low volume high watercut well or other source of a water-oil mixture is accurately metered with systems which include a separator vessel which allows a water-oil mixture to collect and form a separate oil layer on top of the water and which has liquid level sensors and an oil detector which measures the presence of an oil layer. The sensors are arranged in such a way with associated control circuits so that the vessel does not discharge oil until a significant accumulation of an oil layer occurs in the vessel. The systems each include a liquid discharge conduit and a motor operated control valve connected to a logic circuit which receives signals from the level sensors and the oil detector to provide cyclic operation of the valve to discharge water from the vessel repeatedly until a relatively large quantity of oil collects and then discharges all of the oil prior to resumption of the operating cycle.

Abstract: A valve has a housing having an inlet connection and an outlet connection d formed with a valve seat having spaced inlet and outlet ports connected to the respective connections and a valve element formed with a throughgoing passage having an upstream end and a downstream end. This valve element fits in the seat and is displaceable therein between an open position with its passage aligned between the respective inlet and outlet ports and a closed position with its passage out of alignment between the ports. The passage is formed upstream of its downstream end and downstream of its upstream end as a restriction and is of larger flow cross section at its downstream end than at the restriction so that on fluid flow through the valve from the inlet to the outlet pressure drops in the passage downstream of the restriction.

Abstract: Detent mechanisms are useful for retaining a stem of a control valve at predetermined operating positions. The ball type detents commonly used in control valves tend to slide thereby causing the operator to extend additional energy to overcome the sliding friction. The subject detent mechanism includes a roller rotatably disposed on a pin carried by a roller carrier. The roller has an annular arcuate surface in rolling contact with the peripheral surface of the stem. The arcuate surface increases the contact surface between the roller and the stem to thereby insure that the roller rolls on the stem and minimizes the lever effort necessary to move the stem.

Abstract: An apparatus for supplying a liquid under a constant pressure comprising a supply tank disposed at a higher lever than articles, i.e.

Abstract: A pulsator device includes a water chamber having a small inlet orifice for inletting pressurized water at a relatively low rate in a continuous manner, and a large outlet orifice. An outlet valve assembly controls the large outlet orifice to open it at a relatively high chamber pressure and to close it at a relatively low chamber pressure. The outlet orifice is one end of a hollow stem passing through a wall of the water chamber. The outlet valve assembly includes an expansible/contractible control chamber and a valve member effective, in the normal expanded condition of the control chamber, to close the one end of the hollow stem, and in the contracted condition of the control chamber to open the one end of the hollow stem, and thereby to output pulses of pressurized water through the hollow stem.

Abstract: A liquid treatment installation comprises apparatus for controllably treating a liquid with a liquid treatment substance. The apparatus comprises a body, a container for a liquid treatment substance in the body, and a removable closure member on the body. The installation also includes a liquid supply conduit connected to the liquid inlet of the apparatus, a liquid discharge conduit connected to the liquid outlet of the apparatus, and level control means for maintaining the liquid level in the container, thereby to dose liquid passing through the body accurately with liquid treatment substance.

Abstract: In a co-rotational scroll apparatus having two interleaving scroll wraps secured to end plates rotating about parallel, non-concentric axes, a precharging device affixed to one end plate and substantially enclosing the scroll wraps and the second end plate. Preferably, the precharging device includes a cup-shaped drive housing secured to one end plate and enclosing the scroll wraps, and a flexible torque-transmitting member connecting between the enclosure member and the second end plate. Apertures are provided in the enclosure member to permit fluid flow into the space enclosed by the enclosure device, with vanes disposed adjacent the apertures to force fluid into the enclosed space during rotation of the scroll wraps. Fluid thus forced into the enclosed space is precharged prior to entering the scroll wraps, being at higher pressure than fluid exterior the enclosed space, improving the operating efficiency of the scroll apparatus.

Abstract: In the cooling of UV high-power radiators, the cooling of the inner electrodes (5) which are at high tension potential is critical insofar as it is necessary to use fully demineralized water or oil for this purpose. Since a cooling body (9) must in any event be employed for the external cooling, this cooling body is utilized at the same time as heat exchanger for the internal cooling.

Abstract: A pressure relief valve (1) has a relief piston (5) for a large stream of oil and a precontrol piston (11) for a small stream of oil for influencing the point of actuation of the reliefing piston. Both pistons (5 and 11) are part of seat valves. The pressure relief valve is to be constructed so that the maximum pressure adjusted at high oil viscosity declines. In that way, the hydraulic apparatus containing the pressure relief valve is protected against overloading at low temperatures. For that purpose, the precontrol piston (11) has a bushing-shaped extension (26) that projects into a drilled hole (25) that is connected with an outlet (23). Furthermore, a ring surface (A1) is provided at the precontrol piston (11) that acts in the direction of opening. By means of the extension (26), a pressure-regulating section (27) that is dependent upon viscosity comes into play that generates a dynamic pressure that acts upon the ring surface (A1) when the oil is cold.

Abstract: A check valve wherein the housing has an inlet and a seat at one end and an outlet at the other end. The other end can receive a removable and reinsertable cage which serves to confine a selected one of several spherical and/or otherwise configurated valving elements to movements between a sealing position of engagement with the seat to seal the inlet from the outlet and an inoperative position in which the housing, the selected valving element and the cage define a path for the flow of a fluid from the inlet toward, through and beyond the outlet. The inserted valving element is biased against the seat by a spring or by the fluid when the pressure of fluid at the outlet exceeds the pressure of fluid at the inlet.

Abstract: A rotary slide valve, especially for auxiliary-power steering devices for motor vehicles, has a rotary slide (2) rotatable opposite a control bushing (1). The control bushing (1) and the rotary slide (2) have guiding longitudinal grooves (3, 4, 7, 8) that work together for directing a pressure agent from a pressure agent source to and from a servomotor. Guiding edges (5 and 10 and 6 and 11) of the guiding longitudinal grooves (3, 4, 7, 8) of the control bushing (1) and the rotary slide (2), working together, are placed parallel with each other. The guiding edges (5, 6) of the guiding longitudinal grooves (3, 4) of the control bushing (1) and the guiding edges (10, 11) of the rotary slide (2) are positioned conically with respect to each other longitudinally.

Abstract: Control apparatus and method for controlling the flow of fluid across a valve includes a differential pressure measurement across the valve and a flow meter for measuring the flow, and the information from the differential pressure and from the flow meter is compared to predetermined parameters, and in response to the comparison, the valve is modulated to provide the desired flow.

Abstract: A plate structure including conduit and reagent delivery means for a fluid delivery system is provided to deliver precise volumes of a plurality of fluids in sequence to a treatment reservoir. Fluid channels are formed in the plate structure to provide a means for delivering fluids from a plurality of fluid reservoirs attached to the plate structure to one or a plurality of treatment reservoirs attached to the plate structure. Each fluid is delivered by a system comprising a check valve in fluid communication with a fluid reservoirs, a positive displacement pump in fluid communication with the check valve and an injector in fluid communication with the positive displacement pump all of which are attached to the plate structure. A partition switch attached to the plate structure is provided to direct fluid to the desired treatment reservoirs or pressure reservoirs.

Abstract: A freeze wheel is provided with an outer skin on which a food or other type product is placed to be frozen. A chamber is formed adjacent the outer skin and a plurality of nozzles project into the chamber for directing a refrigerant onto the inner surface of the skin. The refrigerant flow is controlled to provide a uniform flow pattern along the inner surface to strip away a boundary layer of fluid and maximize heat transfer across the outer skin. The nozzles are arranged in a series of concentric rings with the nozzles in alternate rows lying in common radial planes. An interior portion of the wheel is closed off by one or more doors which may be opened to allow cleaning of the wheel.

Abstract: This invention relates to a free float steam trap which comprises a trap casing having an inlet port and an outlet port and a valve chest formed therein, a valve seat member attached to the lower portion of the valve chest and having a valve orifice opened through which the valve chest communicates with the outlet port, a float valve arranged in a free state in the valve chest, rising and descending in accordance with the water level in the valve chest to directly open and close the valve orifice and a means for dispersing and passing condensate flow downward, provided at a fluid inlet through which the inlet port communicates with valve chest.

Abstract: This invention relates to a pneumatic control device having an operating mode selecting means for operating in either the manual or automatic modes. Pneumatic pressure is regulated in the manual mode by a hand operated leakport, and in the automatic mode by a voice coil or other pressure regulating device. The pneumatic input supply, manual pressure regulating means and voice coil all communicate at a common surface. The mode selecting means slides across this common surface to connect together the pneumatic input supply with one of the selected pressure regulating means.