Abstract: A combined delivery and damping valve unit for a fuel system of a compression ignition engine comprises a body having a bore including a wider portion and a narrower portion. A spring abutment for the spring biasing the delivery valve member serves as a seating for a damping valve member. The abutment is retained against the step defined between the wider and narrower portions of the bore by locking members having a wedge section and biased by a spring.

Abstract: A pressure converter valve suitable for use in fluid flow systems. The pressure converter valve comprises a solid body having a plurality of interconnected bores formed therein with unidirectional flow devices located within certain of the bores to form parallel flow paths between the inlet and outlet ports of the pressure converter valve such that fluid flows in a first direction through one of the outlet ports and in a second direction through the other of the outlet ports regardless of the direction of fluid flow through the inlet ports. The pressure converter valve is adapted to have an auxiliary fluid control valve mounted thereto in fluid flow communication with the outlet ports of the pressure converter valve and, further, includes fluid flow paths connecting the outlet ports of the auxiliary valve to an auxiliary fluid operated device which is controlled by the auxiliary valve.

Abstract: A heat trap assembly to prevent heat loss in the cold water inlet and hot water outlet piping systems of hot water storage vessels. The assembly consists of a heat sealing member normally located against a seat within the piping system of the cold water inlet to close off loss of heat by thermal circulation from the hot water in the storage vessel when no cold water is flowing through the piping and into the storage vessel and a second heat sealing member located against a seat within the piping system of the hot water outlet to close off loss of heat by thermal circulation from the hot water in the storage vessel when no hot water is flowing from the vessel. The heat sealing members are moved from their respective seats when water is flowing through the piping and stops are provided which confine the longitudinal movement of the respective heat sealing members.

Abstract: A back flow preventing device is disclosed which prevents the reverse flow of water from a point of use into a water supply system. The device has a casing with coaxially aligned inlet and outlet openings, and containing coaxially aligned inlet and outlet check valves. The coaxial alignment of the inlet and outlet openings, and of the inlet and outlet check valves serves to minimize the pressure drop through the device. Between the inlet and outlet check valves is a diaphragm actuated relief valve which opens to drain the passage between the check valves if they should malfunction or if there is a drop in the supply line pressure sufficient to cause actual or potential reverse flow back toward the supply line. The internally-located inlet and outlet check valves are each removably secured in place by internally-located retaining rings.

Abstract: Disclosed is a valve assembly having a housing defining a flow passage with an inlet port and a shoulder surrounding the port. The shoulder is chamfered in an upstream direction. A valve seat formed of a gold material, preferably 24 karet gold, is disposed on the shoulder. The margin of the seat about its central opening is deformed in an upstream direction against the chamfer. A sapphire ball seats against the deformed seat to seal the flow passage through the valve assembly.

Abstract: A heart valve prosthesis has an annular valve body and two curved leaflets which are pivotally mounted for movement between open and closed positions. A 360.degree. groove is provided in the interior surface of the valve body, and spherical pivots projecting from opposite sides of the leaflets are pivotally received in the groove. The valve functions as a check valve, and the flow reversal which occurs during the pumping strokes of the heart causes the leaflets to pivot from one position to the other. As the leaflets pivot, they orbit about the axis of the valve eliminating localized wear which could otherwise occur at the locations in the valve body against which the rotating pivots would bear.

Abstract: A cleanout fitting has a tubular body adapted to be connected between a pair of conduits and having an upwardly open well defined between the upstream and downstream end of the body. This tubular body is formed internally with a downward upstream step and a downward downstream step. At its upstream step the body is also formed with a downwardly U-shaped abutment forming a downstream-facing upstream insert seat. At its downstream step the body has a plurality of ridges defining an upwardly open U-shaped seat. Inserts, normally check valves, have rings receivable in these seats and each have a valve flap engageable with the respective ring. A cover is sealingly engageable over the well, and also serves to hold at least the downstream insert in place in the respective seat.

Abstract: The invention provides a high flow rate standing valve for oil wells of the type employing a plurality of check valve units disposed in parallel between inlet and outlet passages, the flow area of the inlet or outlet passage each being not in excess of the total flow areas of the individual check valves so that no significant pressure drop is produced by fluid flow through the check valves in their open position. Specifically, the invention provides an improved configuration for such standing valves permitting the convenient manufacture and assembly of the valve components. In a modification of the invention, the standing valve housing is constructed so that its lower end is mounted on and co-operates with a conventional well safety valve.

Abstract: The invention contemplates a combined closure spring and upstop having particular application to check valves having multiple valve members. The invention is illustrated by one embodiment involving two valve members hinged on a single axis oriented diametrically of the valve-flow passage, and by another embodiment involving more than two valve members hinged on separate axes oriented tangentially of the valve-flow passage.

Abstract: A multiple valve assembly for use in the medical field includes a pair of flexible valve discs which are essentially co-planar with each other. A pair of tube connectors are oriented to be at an essentially right angle with respect to each other, and fluid communication between the interior of a hollow body and the tube connectors is controlled by the valve discs. An aspiration procedure has one valve disc in an open position and the other valve disc in an occluding position, and an injection procedure reverses the positions of the valve discs.

Abstract: Two identical check valves assemblies are connected in series with a zone between them. A differential control valve vents this zone to atmosphere whenever the downstream pressure approaches the upstream pressure within a predetermined magnitude. The action of the differential control valve is responsive to differential pressure across the upstream check valve.

Abstract: A back flow preventing device which prevents the reverse flow of water from a point of use into a water supply system. The device has a casting with coaxially aligned inlet and outlet openings, and containing coaxially aligned inlet and outlet check valves. The coaxial alignment of the inlet and outlet openings, and of the inlet and outlet check valves serves to minimize the pressure drop through the device. Between the inlet and outlet check valves is a diaphragm actuated relief valve which opens to drain the passage between the check valves if they should malfunction or if there is a drop in the supply line pressure sufficient to cause actual or potential reverse flow back toward the supply line.

Abstract: A closing member for a ring valve is a flexible reed of substantially semicircular form comprising an outer ring portion with mounting points at its ends, and a plurality of inner ring portions connected to the outer ring portion by at least one radial web.

Abstract: A smoothly acting adjustable fluid flow check valve comprises an adjustably spring biased ball valve member, a piston upstream of the ball valve member and having a stem acting as an actuator for the ball valve member and as a further valving member actually controlling the volume of fluid passing through the check valve, the piston and ball valve member moving under the influence of a dashpot disposed so as to damp their movement. The valve may be incorporated into a conventional faucet structure.

Abstract: A check valve with a mounting ring body defining an orifice and having valving means comprising two pivotal valve members mounted on one face thereof. Each valve member is configured to comprise a segment of a cone which is movable between a closed and an open position over the orifice by the flow of fluid. The strength of the valve members and the flow of fluid therethrough when the valve members are in their open position is maximized by providing the concave inner surface of each valve member with an ellipsoidal segment form. The mounting ring body is also provided with stops against which the valve members abut in their open position for reducing fluttering thereof during fluctuating flow rates and resulting surges in fluid pressure.

Abstract: A liquid atomizer includes a housing having a gas flow passage therein and a constriction in the passage, a flow restrictor bearing against the constriction at the downstream side thereof, and a carrier member located upstream of the constriction. The carrier has an axial extension thereon projecting through the constriction, and the flow restrictor is spring mounted on this extension. Thus, any interference with the desired uniform liquid atomization from the passage is completely avoided.

Abstract: A combination pressure reducer and flow control valve which includes a valve body and cover means having an upstream port and a downstream port, and two parallel fluid flow passages interconnecting said ports. An adjustable differential pressure valve means is operatively mounted in a first one of said two parallel fluid flow passages for reducing the upstream pressure of fluid entering the upstream port to provide a reduced downstream pressure at the downstream pressure port. A check valve means is operatively mounted in the second one of said two parallel fluid flow passages and it is operative to check the flow of fluid through said second one of said two parallel fluid flow passages when fluid is flowing through said first one of said two parallel fluid flow passages, and to allow flow of fluid through said second one of said two parallel fluid flow passages when fluid is exhausted into said downstream port and out the upstream pressure port.

Abstract: An automatic emergency stop apparatus which prevents counter flow and counter fire of gas bodies. The apparatus comprises a check valve, a cut-off valve and a filter unit. The check valve is positioned in the gas inlet portion of a decomposable closed-type valve casing. The check valve is opened only by inflow gas pressure. The cut-off valve engages with a portion of a safety apparatus operated by counter pressures created during counter flow and counter fire conditions. The safety apparatus causes the cut-off valve to automatically stop the flow of gas upon the application of counter pressure. The cut-off valve is positioned in the apparatus gas outlet. The filter unit, which is adapted to buffer the counter pressures caused during the production of the counter fire and to remove carbon sludges, is interposed between the check and cut-off valves.

Abstract: 1. A sensitive blocking valve device comprising a casing, said casing comsing a pair of half-shell members each including a mating surface at the outer periphery and each having an axial valve seat portion projecting into the interior of said casing and in mutual alignment, an axial orifice through the valve seat portion of each half-shell member, a metallic valve wafer comprising a central valving portion disposed to move to close either of said orifices in said valve seat portions of the casing and having an integral double spiral flat spring formed integrally therewith and extending from said central portion, and an annular portion at the outer periphery of said double spring and formed integrally therewith, said annular portion being disposed in clamped relation between said half-shell members, said wafer including said double flat spring and annular portion all being of the same uniform thickness and planar when the valve device is unoperated.

Abstract: A downhole pump has spaced upper and lower pistons connected together by a common rod so that the pistons reciprocate within a cylinder. The cylinder is separated into an upper and lower engine chamber by a frame supported from the cylinder wall and arranged laterally with respect to the longitudinal axial centerline of the connecting rod. A bushing is positioned centrally of the frame and sealingly engages a reciprocating marginal length of the connecting rod. An exhaust port is formed through the frame in spaced relationship to the bushing. A resilient exhaust valve element surrounds the bushing and includes a lower, circumferentially extending edge affixed to the frame outwardly of the exhaust port and further includes an upper seal end which sealingly engages a marginal external surface of the bushing.

Abstract: Apparatus and method for applying aspiration, irrigation, medication and ultrasonic power and dwell time to biotissue for surgery and treatment wherein the pressure for both aspirating and irrigating is precisely and accurately maintained by the use of a differential valve and a control reservoir which is generally much larger than the biotissue cavity to be operated on and wherein the pressures for irrigation, aspiration, medication and the application of the amplitude and dwell time of ultrasonic energy can be precisely controlled, externally, to the patient.

Abstract: The invention concerns improvements in a split leaflet check valve. A pair of curved leaflets are hinged to a base ring for swinging movement from a normally closed position to an open position whenever a fluid is moving through the conduit wherein the valve is mounted. At the closed position, portions of each leaflet are seated upon the base ring and other portions are seated against each other to effect the closure. At the open position the leaflets, curved to the curvature of the conduit, lie against the sides of the passageway to provide for flow of fluid through the check valve with a minimum of turbulence. The hinge at the base of each leaflet is formed as a hook reaching into a side socket in the outer wall of the base ring. This check valve may be used where a minimal flow turbulence is desired such as in pipeline systems pumping sludge, artificial heart pumps and cardiac surgery.

Abstract: A straightway valve for a positive-displacement machine comprises a polyhedral body with outlet ports and seat surfaces on the sides thereof, flat friction-free closure plates, and a means for attachment of the closure plates to the body, which takes the form of a polygon-shaped plate having on its ends clamping lugs for holding the closure plates in place on the seat surfaces of the body. The polygonal plate has, for example, a bore with projections formed around the periphery thereof and engaging a blind recess in the end face of the body, thus providing for a reliable and easily removable attachment of the plate to the valve body. The valve can serve as a suction and delivery valve in cylinders for compressors of any output with pressures of up to 1,500 kg/cm.sup.2 and with shaft rotational speeds of up to 3,000 revolutions per minute.

Abstract: A back flow preventer valve assembly for protecting fluid supply systems against back flow of contaminating fluids includes a pair of serially connected check valves positioned within respective housings which are connected together and to inlet and outlet fittings by slidable sleeve-type couplings. The couplings are sealed to the fittings and to the valve housings by resilient annular gaskets, preferably O-rings. Tie bolts extend longitudinally from the inlet fitting coupling to the outlet fitting coupling to retain the assembly together. This assembly provides for interchangeability of components, easy removal of the valve units from the line in which they are connected without disconnection of the inlet and outlet fittings, and for easy replacement or substitution of a fitting. Each check valve includes a poppet assembly of advantageous modular construction, with components easily replaceable.

Abstract: A fluid control mechanism utilizing a housing having an opening or tunnel through the interior of the same. The housing provides at least one chamber communicating with the housing opening. A seat positions within the housing opening and the chamber. A plug, adapted to occupy the seat and close to restricted passage, positions within the first chamber. Particulate filter means comprising a pressure deformable section which includes a passage to the housing opening partially filled by a relatively rigid filter element. A gap in the filter means passage allows compression of the deformable section.

Abstract: A flow control device is provided for delivering a fluid flow in one direction only while providing for venting of a backflow of fluid in an opposite direction wherein a plurality of self-contained check valve units are slideably received in an elongated housing with one of the check valve units additionally functioning to control the venting of the back flow through an opening formed in the housing wall.

Abstract: Cardiovascular malfunction is corrected by implantation through open-heart surgery of a prosthetic valve assembly in which a specially formed valve retainer ring, designed to be secured within a blood vessel by means of sutures, supports a plurality of valve flaps in uniquely hinged relationship. The hinged valve flaps are arranged to normally occur in a closed position in which adjacent flap edges, when in abutting relation to one another, limit hinging movement in one direction. The valve flaps are designed to closely resemble valve flaps in a human heart with hinged mountings devised to insure pronounced longevity being provided. Each valve flap, in response to systolic pressure, is free to move away from the normally closed position described. There is thus produced a central passageway through which fluid may flow in a substantial linear path of travel with little, if any, turbulence or traumatic effects being induced.

Abstract: A respiratory valve, especially for use in the circuits of anaesthetic gas devices, having a body member formed with two arms in a V configuration, intended for inhalation and exhalation, respectively, and a tubular mouthpiece fitting. To the two arms are connected, by joints, an inhalation fitting and an exhalation fitting, respectively; the joints retain each the fastening ring of a shutter, the resilient membrane of which closes and opens in response to the gas circulation, as required.

Abstract: Calibrated pressure relief valve constituted by a body, a closure member, a piston which slides tightly in a bore and defines in the body an exhaust chamber and an adjustment chamber, a member for returning the closure member, interposed between said latter and the piston, and by a means for adjusting the position of the piston with respect to the body, on which the piston abuts and which comprises a source of incompressible fluid, of which the delivery conduit is connected to said adjustment chamber, said pressure relief valve further comprising a non-return valve disposed in the conduit connecting the source of incompressible fluid to the adjustment chamber and fixed on the body of the valve. One application of the present invention is the provision of a station for the centralized remote adjustment of the settings of the various valves of a circuit, for example the driver's cab of a hydraulic loading shovel.

Abstract: An annular valve stop insert for a compressor body is shown which has the function of establishing the positional relationship of the valve plate, valve and compressor body.

Abstract: A non-clogging check valve assembly useful in the simultaneous dispensing of individual components of a two-part grouting material. Two opposed flexible outlet nozzles mounted adjacent one another in a body member allow the components to be dispensed in a mixing relationship. The outlet nozzles are dome-shaped and contain slot-like apertures to allow the dispensing of the components under pressure and to prevent the clogging re-entry of the components into the valve which would otherwise result from back pressures developed as the components combine and react.

Abstract: A check valve has a valve member seated on a separating wall member in a housing to interrupt the flow of fluid. The valve member is formed to be unseated from the separating wall member in its free state so that the fluid may flow through a clearance between the valve member and the separating wall member when the pressure difference between one side of the separating wall member and the other is small, while it is formed to be seated on the separating wall member when the pressure difference has become larger. Therefore, the fluid can pass in the both directions crossing the separating wall member when the pressure difference is small, while it is interrupted when the pressure difference has increased.

Abstract: In a telescoping shock absorber which has a cylinder containing a damping medium and a piston slidably disposed in the cylinder, within the confines of the cylinder there are provided separate first and second channels provided with valves. The valves are so oriented that -- in response to the motion of the piston -- in the one channel there will be a medium flow only in the one direction and in the other channel there will be a medium flow only in the other, opposite direction. At least one of the channels has a first valve designed as a function of the desired damping characteristics of the shock absorber and a second valve disposed downstream of the first valve with respect to the flow direction of the damping medium in that channel. The second valve is structured merely as a check valve to open at least approximately simultaneously with the opening of the first valve and to close prior to the closing of the first valve.

Abstract: A valve device for controlling fluid flow into and out of the working chamber of a reciprocating pump. A valve body axially receives the pump connecting rod and includes circumferentially extending, alternately arranged, intake ports and exhaust passageways. Seats are formed on opposed sides of the main body, and a spring-loaded plate abuttingly engages the seats.An outwardly directed annulus circumferentially extends about a central,, marginal portion of the main body and communicates with the inlet port by means of an outwardly directed cavity which is formed by milling a crescent-shaped portion of a cylinder having an outer peripheral edge portion which intersects the centerline of a vertically disposed, constant diameter port, while the centerline of the axial passageway, port, and cylinder lie along a common line drawn normally to the longitudinal central axis of the valve body.

Abstract: A valve plate for use in a reciprocating gas compressor is disclosed wherein lower and upper members are held in spaced apart relation so as to define a suction gas flow path therebetween. A corrugated element is located in the flow path and bonded to said members, the corrugations thereof defining suction gas flow paths of minimal resistance, thus improving the efficiency of the compressor, while providing the support necessary between said lower and upper members.

Abstract: A valve assembly especially adapted for use with very high pressure reciprocating pumps. The main components are coaxially aligned. A main high pressure passage extends through the center of the assembly and has check valves at opposite ends thereof. One of the check valves has an annular valve element comprising inner and outer sleeves which fit against one another with an interference fit. This annular valve element seats against a matching annular inlet passage.

Abstract: A tractor protection valve for use in the air brake system of a tractor-trailer vehicle combination to protect and maintain the braking system of the tractor includes a housing having tractor supply and control ports, trailer supply and control ports, and a pair of exhaust ports. The housing has a chamber with the exhaust ports being positioned at opposite ends of the chamber. First and second spring-biased pistons are axially movable in the chamber to control communication between the ports.

Abstract: A pressure limiting device for protecting a fluid pressure circuit involves a stack of elastomeric washers, and each of the washers has a slit through which fluid can bleed to reduce the fluid pressure below a critical value; the slits are normally closed and so prevent substantial fluid flow, but are able to open to pass fluid when the pressure reaches a critical value at which the pressure distorts the stack of washers.

Abstract: An economical valve assembly for mounting resilient metal leaf valves for the cylinder of a reciprocating compressor. A valve plate with suction and discharge ports has a discharge leaf or flapper valve with a mounting portion secured thereto by a pair of rivets which have elongated body portions that extend inwardly from the valve plate. The suction valve has a mounting portion with apertures through which the projecting portions of the discharge valve fasteners extend. The elongated portions of the fastener bodies are received in holes in the cylinder block, positioning the valve plate and valves on the block. Pressure on the discharge valve is established by the rivets while pressure on the suction valve is established by the valve plate mounting. Sufficient pressure to achieve a satisfactory seal is applied independently to the mounting portion of each of the leaf valves without causing distortion which might result in failure of the valve to seat properly.

Abstract: A permanently implantable artificial heart utilizing a pulsatile magneto-motive pump consisting of a pump chamber, which has two cobalt rare-earth permanent magnets spaced apart relative to one another so that unlike poles of each magnet face each other across a predetermined gap, one electromagnet coil, a ferromagnetic piston and a hydraulic fluid. The complete heart consists of two separate half hearts each having one pulsatile magnetic pump, an atrium, a ventricle, respective valves and collapsible hydraulic sacs. A dc pulse applied to the coil determines the pumping stroke rate of the piston which forces hydraulic fluid in and out of the collapsible sacs causing alternating positive and negative pressure gradients in the atrium and ventricle of the heart, thus producing with the help of one directional check valves, a one-directional pulsatile blood flow circulation.