Abstract: An improved return line filter is provided for use with a fluid system having a fluid reservoir which is at least partly filled with a fluid. The return line filter comprises an elongated housing having an open top and a partially open bottom and in which the housing is positioned within the reservoir so that the lower end of the housing is submerged in the reservoir fluid. A fluid inlet is formed on the lower end of the housing. A filter assembly is provided for use with the housing and comprises a tubular filter element open at each end and a holder assembly which is detachably secured to one axial end of the filter element. The entire filter assembly is insertable through the open top of the housing so that the tubular filter element is positioned coaxially around and spaced radially outwardly from a portion extending upwardly from the housing thus forming an annular chamber therebetween.

Abstract: The invention is an improved cooling system for an internal combustion engine wherein an expansion and degasification tank is placed in the cooling system allowing the liquid containing gases to enter the degasification portion of the tank tangentially thereby creating a swirling vortex flow of the coolant containing gases. The coolant is permitted to leave the degasification portion through a peripheral annular gap in the lower part of the tank created by a conical deflector which collects the gases in the coolant and is arranged so as to permit the gases to pass to the expansion of the tank. A check valve mounted in the outlet of the expansion tank prevents any backflow of liquid. Further, the gases are allowed to escape into the atmosphere through a pressure release valve mounted to the top portion of the expansion chamber.

Abstract: A device comprises a cap formed by a body (4) provided with a base (8) which is biased outwardly by a spring (12) and carries an annular sealing element having a lip (10). The base is provided with a center orifice (14). Mounted on the outer face of the base (8) is a sealing element (20) which is also provided with a center orifice. A filtering element (18) is clamped between the element (20) and the lipped element (10) and closes the orifice (14) so as to substantially preclude the passage of the liquid while allowing the passage of air. The filtering element is formed for example by a tablet which may be partly protected by a thin and impermeable diaphragm (110).

Abstract: A drilling fluid circulation system for containing drilling cuttings, gas and drilling fluid in a closed loop. The system includes a separator having two sealed compartments, one for settling out drilling cuttings and one for holding clean drilling fluid. A fine solids separator is provided between the two compartments, and a gas exhaust line for conducting gas released from the returning drilling fluid is provided to conduct the produced gas to a safe location away from the working area. A solids discharge device is provided for removing settled drilling cuttings.

Abstract: A filter element utilizes a perforate inner filter tube sock tightly fitted within an outer perforate support tube sock, the two socks being sealably mounted at their open ends to a tube sheet with the support tube held in tension by the pressure differential across the filter tube during operation of the associated filter.

Abstract: A centrifugal microstrainer includes a closed cylindrical vessel with a cylindrical screen within, both rotating about a hollow shaft forming a common central axis. Liquid-solid admixture introduced through the shaft is flowed radially outward subjected to centrifugal acceleration, and forced back through the screen under pressure with particles too large to pass the screen remaining on its outboard side. The centrifugal force applied by the rotation of the vessel acts on these larger particles pushing them away from the screen thus preventing clogging and permitting substantially continuous operation. The device may be operated as a classifier by providing a plurality of concentric screens of decreasing mesh size spaced outwardly from one another in conjunction with properly sized chokes.

Abstract: A gravity flow disinfectant contactor adapted to enhance contact between a disinfectant solution such as chlorine and the water to be treated to effect a more rapid and efficient disinfection activity. The contactor is constituted by a rectangular conduit having a cross-sectional diffusion plane adjacent its inlet within which is an array of evenly-spaced diffuser tubes supplied with the disinfectant solution. The tubes each have a row of equi-spaced holes drilled diametrically therethrough to produce side-by-side opposing jets of disinfectant in the diffusion plane at right angles to the cross-flowing water stream. As a consequence, the water flowing through the conduit is subjected to a dense cross fire of multiple jets of disinfectant that are uniformly distributed throughout the diffusion plane and quickly interact with the water within a relatively short downstream distance.

Abstract: The silencer-separator described hereinafter includes a tank that has an inlet arranged to receive the discharge from a vacuum blower or the like, a discharge located at the opposite end of the tank, a partition located therebetween with hole extending therethrough to permit the gas to flow from the discharge of the blower to the discharge of the tank. At the lowermost end of the tank, there is provided a drain for the liquid that is separated as the air enters the tank from the blower. An overflow conduit extends from adjacent the lowermost portion of the tank, through the partition and is connected with the liquid drain. With the conduit arranged in this manner, water, which is used to seal the blower, is located in the conduit preventing sound, generated as the gas is discharged from the blower, from passing through the conduit to the atmosphere via the drain.

Abstract: A foam removal apparatus for a vessel which contains a liquid as well as foam bubbles has a cover inclined with respect to the horizontal, a screen, and a trough, the trough being located beneath at least a portion of the screen for removing foam pushed through said screen. The apparatus can be used in conjunction with any shaped vessel and requires no energy for foam removal. Either a rising liquid level in the vessel or a continuous generation of foam forces the foam against the inclined cover and through the screen which causes a substantial amount of foam bubbles to collapse and fall as liquid into the trough.

Abstract: A refill filter cartridge for a liquid fuel filter includes a semi-rigid plastic "blister" having an open end closed by a cover member to define a fluid receiving compartment. A pleated paper filter medium in the compartment divides the latter into inlet and outlet portions which communicate with openings in the cover member. The filter housing includes a base and a cup-shaped glass housing that cooperates with the base to define a chamber which receives the plastic blister when the refill cartridge is installed in the filter. The cover member defines cooperating surfaces which engage the base and the glass housing so that the glass housing clamps the cover member between the glass housing and the filter base. The plastic blister is shaped to conform to the inner walls of the housing so that the housing engages the walls of the blister throughout their entire area.

Abstract: A horizontal vacuum belt filter having an endless filter cloth on which a residue filter cake is, in use, formed; a filter head roller; a rotatable discharge roller located some distance forward of the head roller, a portion of the filter cloth passing over a segment of the cylindrical surface of the discharge roller and being in engagement therewith; a plurality of longitudinally directed and circumferentially spaced apart passages being provided in the discharge roller which are each in communication with a different segment of the cylindrical surface of the discharge roller via suitable bores; a first valve for directing a discharge liquid to those passages which are in communication, at any particular time, with that segment of the cylindrical surface of the discharge roller engaged by the filter cloth; and a plurality of second valves for permitting flow of discharge liquid only from those passages that are in communication with the said segment through the bores associated with those passages to the sai

Abstract: A bottom loaded filter assembly for filtering radioactive liquids through a replaceable cartridge filter. The filter assembly includes a lead-filled jacket enveloping a housing having a chamber therein for the filter cartridge. A track arrangement carries a hatch for sealing the chamber. A spacer plug supports the cartridge within guide means associated with the inlet conduit in the chamber. The plug and cartridge drop out of the chamber when the hatch is unbolted and move laterally of the chamber. During cartridge replacement, a new plug and cartridge are supported in the guide means by a spacer bar inserted across the track means under the chamber. The hatch is then slid under the chamber and bolted to the vessel, engaging an O-ring to seal the chamber.

Abstract: A detachably secured food straining screen is formed with lower and upper peripheral grooves for pressure fitting engagement with the top of a cooking pot and the bottom of a cover for that pot, respectively.

Abstract: A coaxial hydromagnetic device for inhibiting or reducing the adhesion of calcium and magnesium scale to heat transfer surfaces, boiler walls, and similar surfaces which must be kept free from undesirable scale deposits on exposure to "hard" water, the present hydromagnetic device comprises magnets mounted preferably within a non-ferrous receptacle, the magnets being preferably separated by plastic spacers. The respective adjacent poles of the magnets are of like polarity. The magnet-containing receptacle is supported within a water feed-line, an outer tubular envelope formed of non-ferrous material preferably containing the magnet-containing receptacle and being disposed in the water feed-line. In a particular embodiment of the invention, the outer envelope has a number of spaced annular constrictions formed therein, one or more permanent magnets being held within the central hollow cavity of the envelope preferably within a non-ferrous receptacle as aforesaid.

Abstract: This invention relates to an improved ditch water cleaning apparatus characterized by a partially covered open ended frame for insertion in the ditch, an upwardly and rearwardly inclined screen at the upstream end of the frame effective to interrupt the flow of water within the ditch and screen the debris therefrom, a propeller-like brush journalled for rotation about an axis normal to the plane of the screen and so located relative thereto that each arm of the brush successively sweeps the surface of the latter and removes any debris therefrom onto the covered portion of the frame lying immediately therebehind, and brush drive means operatively connected to the brush. The unit also includes a novel comb to pick the debris from the brush bristles preparatory to its moving onto the screen.

Abstract: A filter assembly is provided for fitting to an aperture in the wall of an oil tank of a hydraulic system with a disposable filter canister positioned substantially within the tank. The canister comprises a shell having an end wall and a generally cylindrical side wall, an end plate attached to the shell, a tubular filter element fluid-tightly fitted between the end wall and the end plate to define an outer chamber and an inner chamber between which the only flow path is through the filter element. The end plate has a central aperture communicating with the inner chamber and surrounded by a ring of apertures communicating with the outer chamber. A filter head is fluid-tightly fitted to the outer face of the tank wall in register with the aperture.

Abstract: Air-intake device for internal combustion engines in which the inlet end of an induction conduit is inserted into a hollow casing having a downward facing intake aperture in which a series of parallel baffle plates, by means of curved downstream end portions, deflect the induced air away from the inlet causing water droplets to collect on the casing roof and fall by gravity into annular water traps which have water discharge openings. The intake aperture is surrounded by an annular skirt, the upstream edge of which forms a drip-edge.

Abstract: The shell of a low temperature separator vessel has an inlet spinner structure mounted to absorb kinetic energy of fluids flowed into the vessel. A grating structure is placed over the outlet of the spinner to dissipate kinetic energy of the incoming fluids, divert the direction of fluid flow away from the gas outlet of the vessel, and distribute the fluids transverse their flow path from the vessel inlet to the vessel outlet.

Abstract: A blood reservoir comprises a rigid casing and a perforated tubular member positioned within the casing and extending between the edges thereof. An inlet aperture is at a position at the upper end of the reservoir in communication with the bore of the tubular member while an outlet aperture is positioned adjacent the bottom of the casing exterior to the tubular member. The bore of the tubular member contains first blood-defoaming means, and the tubular member carries a blood filter. In accordance with this invention, second blood defoaming means are positioned about the exterior of the tubular member to dissipate the fine bubbles without interference from the larger bubbles, which have been previously removed by passage through the first blood defoaming means.

Abstract: A compressed gas filter assembly having dual filter units each containing an adsorbent and alternating between filtering and regenerating cycles, the units alternately receiving compressed gas from a source for adsorbing a contaminant therefrom and having the adsorbent regenerated by reverse flow therethrough of filtered gas from the other unit and together providing an uninterrupted output of filtered gas from the assembly, and a regenerating line connecting filtered gas outlets of the units and having in each unit a restricted orifice centered on and directed toward a downstream end of a canister therein containing the adsorbent, each orifice alternately passing a metered flow of filtered gas under substantially constant pressure to the other unit and discharging filtered gas from the other unit as a substantially constant flow of gas at reduced pressure for regenerating and cooling the adsorbent in its unit.