Abstract: A valve analysis and testing system includes various devices for measuring the operating characteristics of a valve and its operator and the corresponding imposed valve stem load, which devices are attached to the valve operator. These devices provide for statically calibrating the operator relative to the imposed valve load and provide recording traces of the imposed load and associated parameters during dynamic conditions as related to the operation of the operator and valve combined. The system provides initial dynamic traces after initial assembly, maintenance and/or periodic testing of the operator and valve. The system is then used to provide diagnostic dynamic traces at any specified time in the future for the operator and valve. These future traces are used to compare with earlier traces to verify correct performance and most importantly to detect induced or impending damage, malfunctions, or maintenance requirements for the operator and valve.

Abstract: A testing device (22) for a non-flowing pilot valve (20) controlling a main relief valve (13) and simulating the action of the relief valve (13). The testing device body (84) has a test fluid source (42) releasably connected thereto and includes a piston valve element (112) mounted in a valve chamber (106) for movement to an unseated vent position upon the test fluid pressure reaching a predetermined high which is usually similar to the set point operating fluid pressure at which the main relief valve (13) will actuate. For return of piston valve element (112) to a seated position after a reduction of the test fluid pressure by venting, a relatively large diameter end face (128) is exposed to fluid pressure from an intermediate fluid chamber (78) of the pilot valve (20) which is in fluid communication with the dome (14) of the pressure relief valve (13). A relatively small fluid pressure responsive area of piston (113) outwardly of small diameter O-ring (120) is exposed to test fluid pressure.

Abstract: An apparatus and method for testing prosthetic heart valves prior to implant in the human body provides a test chamber having a flow channel therethrough and a passageway which receives a mounting fixture for a heart valve. The test chamber is used in a mock circulatory loop with the flow channel being in the loop. Preferably, the test chamber has a transverse passageway that intersects the flow channel, and the mounting fixture advances completely through the test chamber from an insertion location to a disconnect location while a dynamic seal is maintained. Two such test chambers may be used in a mock loop, and the loop is configured with an intake chamber fluidly interconnecting one side of each test chamber, and a restriction chamber fluidly interconnecting the other sides of the test chambers. The restriction chamber is variable, and pressure compensation is provided between each of test chambers and the restriction chamber.

Abstract: Apparatus for monitoring the working stroke of a hydraulic ram 1 includes an indicator 3 having a housing 24 containing a tubular measuring chamber 25 connected to the hydraulic ram by a hydraulic line 2. The tubular measuring chamber is transparent on at least one side for the observation of the level of hydraulic fluid contained therein. The lower end of the tubular measuring chamber is connected to the hydraulic line leading to the hydraulic ram. The upper end of the tubular measuring chamber is closed by an air-permeable but dust-impermeable member 28.

Abstract: A method for determining the closing point of a pump piston relative to a transverse bore in a corresponding pump cylinder, the method including the steps of providing compressed air to the cylinder via the transverse bore, axially sliding the pump piston near the closing point, consecutively measuring two flow values through a throttle cross-section defined by the pump piston and transverse bore, measuring the positions of the piston corresponding to the two flow values and extrapolating the pump piston unto the closing point from the flow values and piston positions.

Abstract: A system for measuring the operating characteristics of a valve and its operator and the corresponding imposed valve stem load is attached to the valve operator. A unique device and method are used to detect and measure movement of a valve operator spring pack to which access is had from the side of the spring pack. The invention provides initial dynamic traces after initial assembly, maintenance and/or periodic testing of the operator and valve. The invention is then used to provide diagnostic dynamic traces at any specified time in the future for the operator and valve. These future traces are used to compare with earlier traces to verify correct performance and most importantly to detect induced or impending damage, malfunctions, or maintenance requirements for the operator and valve.

Abstract: A sprinker drain and test valve for testing a sprinkler system includes a housing, an inlet and an outlet disposed on either end of the housing, a ball valve disposed within the housing between the inlet and the outlet, the ball valve defining two channels that provide communication between the inlet and the outlet, the first of the channels allowing a flow substantially equivalent to that of one single sprinkler head in the system and the second of the channels allowing a relatively unrestricted flow, a handle for alternatively rotating the ball valve between a first position in which the first channel provides communication between the inlet and outlet and a second position in which the second channel provides communication between the inlet ad outlet, a portion of the ball valve for preventing communication between the inlet and the outlet, and a sight glass disposed downstream of the ball valve.

Abstract: Process and apparatus for testing a pilot-operated safety valve, applicable to (1) a safety valve composed of a body having an inlet branch connected to a pressurized fluid container, and an outlet branch, of a valve head cooperating with a seat for controlling fluid flow between these branches, of a control actuator consisting of a piston connected to the valve head and sliding in a cylinder, forming two chambers, the operative one of which is fed with fluid, and (2) a pilot apparatus controlling the valve and comprising a pressure detection actuator whose piston is subjected to the pressure of the fluid and to the action of a spring acting against the force developed by the pressure, and a hydraulic mechanism with two cocks whose closing contact portions (311, 321) are displaced via an operating rod carrying a disc displaced by the piston, and one of which controls the fluid pressure in the control actuator and the pressure detection actuator, while the other controls the discharge of the control actuator.

Abstract: A method of determining torque of an electronically commutated motor arranged to drive a blower means for flowing air through a contained space with the electronically controlled motor and the blower means having a combined predetermined inertia. In practicing this method, power is applied to the electronically commutated motor, and the blower means is thereby accelerated to a predetermined speed. The power is then removed from the electronically commutated motor, and thereby the blower means is decelerated. The deceleration of the blower means is measured, and the torque of the electronically commutated motor is computed from the measured deceleration.A method of establishing a preferred rate of air flow and apparatus are also disclosed.

Abstract: An apparatus for measuring torque characteristics of devices (20, 73) includes a first shaft (19) having torque applied thereto by a first device (20) and a second shaft (41) having torque applied thereto by a second device (73). Sensing elements (31) are provided which detect the forces generated by the torque of the first and second shafts (19, 41) and produce electrical signals proportional to the forces detected. A first coupling device (25) transfers the forces generated by the torque from the first and second shafts (19, 41) to the sensing elements (31). A suspension mechanism (57) permits the second device (73) to move laterally independent in two spatial dimensions with respect to the first device (20) so as to minimize any effects from mechanical misalignment and the structural support frame (10). The apparatus can be adapted to measure frictional characteristics of devices (20, 73) by providing an actuator (93) for applying a torque to a third shaft (92).

Abstract: A portable instrument system is provided for the testing of pressure and flow characteristics of implantable ventricular shunt valves using a gaseous testing fluid that may be drawn from the testing environment. The system includes a rate pump having a control mechanism that provides a variety of selective constant flow rates so that the valve characteristics can be determined under various operating conditions. Fluid communication is provided between the pump, the valve and a pressure sensing device such that the pressure sensing device receives the same pressure and flow rate that the valve does. Typically, the pressure sensing device is a gauge transducer that utilizes atmospheric pressure as a reference point and senses the changes in the gas pressure in the valve, relaying the pressure readings to a digital display or chart recorder.

Abstract: Test apparatus for on-site testing of an air compressor to obtain a measurement from which the operating efficiency of the air compressor and air flow rate may be calculated to enable the owner of the compressor to determine whether replacement or rebuilding of the compressor is justified. The apparatus comprises an inlet for connection to the air compressor being tested and branch circuits through which the air flow from the compressor is selectively passed. Each branch circuit contains a particular size orifice and an associated shut-off valve, and the condition of the shut-off valves determines the orifice selection. The orifice selection is made to match the running compressor and attain a balanced condition. In this regard a pressure regulator and by-pass control valve, in parallel with each other, are also in the test apparatus for adjustment to obtain the balanced condition.

Abstract: A tension indicator is applied to the belt of a belt driven oil well pumping unit. The pumping unit is driven by an internal combustion engine, and the tension indicator is read for at least one complete cycle of the pumping unit so that the up and down strokes may be dynamically balanced.

Abstract: A device for testing hydraulic actuators using acoustical transducers to se sound sources indicative of leaks or other defects in the actuator. A graph of acoustic signals versus piston location may be determined using one acoustic transducer and one position sensor. A correlation function may be obtained by cross-correlating the output from two spaced acoustic transducers.

Abstract: A method of determination of a supply start in an injection pump, includes the steps of blocking an outlet of a pump element, for example, by a valve, supplying a testing medium into the pump element, and determining a supply start upon a pressure increase in the pump element when an upper edge of a pump piston closes a fuel inlet opening of the pump element.

Abstract: Method and a device for inspecting the operation of a valve. The valve (1, 11) is placed on a test bench (2, 3) capable of applying an opening and closing force to the valve, a representative graph of the movement of the valve as a function of the force applied is plotted, the coordinates of which are measured continuously, and the graph of the test is compared with a reference graph (C.sub.1) in order to detect operating defects according to the positions of the valve. The invention is applicable to the inspection of valves for passing fluids, more specifically in the nuclear industry.

Abstract: A failure detection system for hydraulic pumps each having displacement varying means. The system includes displacement command generating means for generating a command value for causing the displacement varying means of one of the pumps to be displaced a predetermined amount, sensor means for sensing the amount of a displacement of the displacement varying means, comparator means for comparing the absolute value of the difference between a command value generated by the displacement command generating means and the amount of the displacement sensed by the sensor means with a predetermined allowable value, and output means for outputting a failure signal for indicating that the pump is out of order when it is found by the comparator means that the allowable value has been exceeded by the absolute value.

Abstract: A system and method for measuring and controlling the parameters and conditions of a thin-wall submersed-tube fluid transport system called an "equiduct" system. The tube or tubes preferably are located near the bottom of a water artery such as a river, and are in fluid equilibrium with the surrounding water. This permits the tubes to have relatively thin, flexible walls, which makes the tubes relatively inexpensive and easy to install. Simple pumps cooperate with the slope of the river bed in pumping fluids through the tubes. Parameters such as fluid pressures and velocities, depth, gas and liquid concentrations, etc. are measured at spaced locations in the tubes, and the measurements are delivered to a central data processing and control station so that the parameters can be adjusted, or the need for repairs in the tubes can be detected and the repairs can be made.

Abstract: Apparatus and methods for durability (fatigue) testing of prosthetic heart valves or other check valves. The apparatus is circular in plan and includes a test fixture in which the valves are circularly arranged, located with communicating passages, such passages communicating with bellows closed at one end. The bellows are carried by a swash plate journalled to a motor by a coupling providing an adjustable tilt axis. The tilt axis determines the amplitude of the motion or flow of the fluid, as the bellows alternately expand and contract. A central bypass chamber includes orifices which are selectively varied in effective cross section to control an amount of the test fluid which bypasses the test samples, thereby determining fluid pressure differential across the sample valves. Fluid in the apparatus can be heated by an electric heater to temperatures similar to human blood, a temperature probe monitoring the temperature for its control.

Abstract: A means of measuring the operating characteristics of a valve and its operator (16) and the corresponding imposed valve stem load is attached to the valve operator. The device provides a means of statically calibrating the operator relative to the imposed valve load and provides the means for recording traces of the imposed load and associated parameters and during dynamic conditions as related to the operation of the operator and valve combined. The device provides initial dynamic traces after initial assembly, maintenance and/or periodic testing of the operator and valve. The device is then used to provide diagnostic dynamic traces at any specified time in the future for the operator and valve. These future traces are used to compare with earlier traces to verify correct performance and most importantly to detect induced or impending damage, malfunctions, or maintenance requirements for the operator and valve.

Abstract: A spray pattern analyzer for use in analyzing spray patterns formed by spray nozzles which are attached to an agricultural spray applicator boom. This analyzer includes a corrugated collector tray mounted on a cart. The cart has wheels for moving the collector tray through the spray pattern. The collector tray is designed so as to receive collector test tubes each being longitudinally aligned with the troughs of the collector tray. When the troughs are partially filled with spray, the collector tray is tilted so that the spray will flow into the test tubes to provide a visual indication of the pattern. The collector tray is constructed in segments to allow the collector tray to be collapsed. Further, the cart is constructed to permit an adjustment of the height of the collector tray from the surface upon which the cart rests.

Abstract: A meter for measuring liquid flow rates to a device under test has a liquid supply tank connected to the device by a conduit and also has a test standpipe having a uniform internal diameter connected to the device by a conduit as well as also being connected to the tank by a conduit. A shutoff valve is located in each conduit. This allows the standpipe to be connected to the supply to raise the level for the start of a test. During the test only the standpipe supplies the device so the level at the end of the test is subtracted from the starting level to indicate the volume consumed. When a test is not in progress the device is supplied from the tank.

Abstract: A test system for rapid and accurate testing of valves, especially delay valves for automotive applications, includes both an apparatus and test method. This test apparatus utilizes a reference pressure to avoid calculating a barometric adjustment to a measured flow rate through such delay valves.

Abstract: Method and apparatus for checking a sucker-rod pumped well for defects by weighing the well. A load cell connected between the sucker-rod and a power unit develops a signal representative of the load on the sucker-rod. The sucker-rod load is checked with the rod and an associated downhole pump plunger in a stationary position. The load readings are corrected for load cell drift by a computer, and a corrected load value displayed on a digital display unit. The load readings are updated periodically and any changes in load reading can be used to determine the presence of a defect and to ascertain the type of defect in the pumping apparatus.

Abstract: A testing appliance (10) is provided for a metering apparatus (1), the latter being used, in particular, for the aftertreatment of water. The testing appliance is designed in a manner such that it can be connected both to the electrical portion and to the metering line of the metering apparatus and simulates the functions of the metering apparatus in a manner such that it is possible to check every one of these functions.

Abstract: A torque measuring device is provided for use in conjunction with a valve actuator of the type having a housing and an actuator member movable within the housing in unison with the opening and closure of a valve. The device comprises a mounting plate which is attached to the actuator housing in lieu of the valve. A coupler carried by the mounting plate is detachably secured to the actuator member so that the coupler moves in unison with the actuator member. A double acting piston and cylinder arrangement is attached to the coupler so that the torque applied to the valve actuator member is transmitted to the piston. Fluid gases measure the force imposed on the piston and thus the torque which is applied to the actuator member.

Abstract: An economical compact heat exchanger cleaning and testing device and a method of cleaning and testing heat exchangers using said device is disclosed. The device involves a T-shaped fitting, one end of the top portion of the "T" being adapted to be connected to a source of water under pressure and the other end being adapted to be connected to the hose leading to the heat exchanger. The other leg of the "T" is adapted to be connected to a source of air pressure and contains both an air pressure gauge and a modulating valve. By introducing water under pressure and alternately increasing and decreasing the air pressure, a shock wave is produced which tends to remove any accumulated scale in the heat exchanger. After the heat exchanger has been completely cleaned the heat exchanger can be filled with water under pressure and the air pressure can be increased up to a measured pressure to determine whether or not there are any leaks in the system.

Abstract: A device and a method for checking and/or measuring the actual discharge amount of plant protective substances sprayed from a plant protective spraying machine; the device is a measuring container provided with a scale indicating the volume of liquid and with additional markings for determining the corresponding discharge amounts in liters per hectares for various driving speeds. Alternatively, the device is a spring balance with markings in connection with a measuring container holding the liquid to be measured, which markings determine the discharge values in liters per hectares for various driving speeds.

Abstract: A device for determining the timely delivery of compressed gas from compressed-gas containers for ejection and discharge tubes of submarines in which the compressed gas is suppliable via a system-controlled blowout valve comprising a compressed-gas container having a pressure pick-off with a pressure gauge and a converter for producing an electrical signal representing the actual pressure value. Upper and lower desired pressure values in the form of electrical signals are adjustable on transmitters electrically connected to separate comparator stages to which the electrical signal of the actual pressure value and, in each case, one of the signals of the adjusted predetermined values are supplied and by which a timing member having a running time indicator is controlled. The timing member is started when the pressure in the compressed-gas container falls below the adjusted upper pressure value and is stopped when the pressure in the compressed-gas container reaches the adjusted lower pressure value.

Abstract: An apparatus and method for checking the operation of a fluid flow and/or pressure control member with a given and constant flow, wherein the control member is disposed at the outlet of a main fluid circuit connected to a source of pressurized fluid and a bypass circuit at its inlet and having a fluid bleed circuit with an isolation device at its outlet upstream from the control member. The main circuit includes a flow meter, a pressure meter, a progressive volume variation member to enable the pressure in the main circuit to be varied gradually and without fluctuations, and isolation devices for isolating the volume variation member from the control member and for isolating the inlet of the main circuit from the fluid source and the bypass circuit.

Abstract: For use in a crude oil sampling system which delivers samples in pumped pulse fashion, a volumetric analyzer accumulating the sample is disclosed. In the preferred and illustrated embodiment, the device incorporates a valve which is selectively closed to direct the pumped pulsed sample into the apparatus. It includes a cylinder head attached to a cylinder. In the cylinder, there is a reducer sleeve. The reducer sleeve encloses a piston of selected size. The piston is forced upwardly by sample introduced beneath it. The piston connects with a push rod which in turn extends from the apparatus and which supports a piston follower having a marker cooperative with a scale to indicate the volumetric accumulation below the piston. The piston and reducer sleeve calibrate the apparatus to selected maximum capacities.

Abstract: A device for hydrodynamic, in vitro testing of heart valve prostheses. The device has a flow channel in which a flow of desired characteristics is induced. The flow channel includes a test fixture for supporting a prosthesis to be tested in a desired orientation within the flow. In a preferred embodiment, the test fixture includes first and second chambers spaced from each other along the flow channel and a shuttle intermediate the chambers which is movable between at least first and second positions. The shuttle includes at least one support for a heart valve prosthesis and selectively positions that prosthesis in the desired orientation within the flow by movement between the first and second positions. The shuttle may carry two or more heart valve prostheses to alternatively positioned one of them within the flow by movement of the shuttle.

Abstract: This invention discloses a rotary drive device for mechanically rotating the blades of a turbo-fan engine for inspecting the blades. The device is mounted on a blade and has a pulley in frictional contact with the turbo-fan case. A motor in the device continuously or intermittently rotates the blades with respect to the turbo-fan case.

Abstract: An apparatus is disclosed for subjecting a test valve actuator to torque loads which simulate the torque loads an actuator would be expected to experience in field operation when opening and closing a butterfly-type valve in a fluid conduit. The apparatus includes a frame supporting both a drive shaft and a tail shaft mounted for rotation about horizontal axis of rotation. The test actuator is mounted on the frame and coupled to the drive shaft for rotating the shaft 90.degree. about its axis. A sprocket fixed to the drive shaft is connected by a link chain to a sprocket fixed to the tail shaft. The sprockets are selected to have a 3 to 1 gear reduction ratio with the tail shaft rotating 3 degrees for each degree of rotation of the tail shaft. A mass depending from the tail shaft generates a torque load at the tail shaft equal to one third the dynamic torque load for corresponding positions of the actuator.

Abstract: A method and apparatus are disclosed for calibrating the flow rate of a pump. The apparatus includes a high pressure pump, a critical flow orifice and a receptacle or air bag. The high pressure pump pumps a fluid, such as air, through the orifice into the receptacle at pressure sufficient to maintain the flow rate past the orifice in the critical region wherein flow rate is essentially independent of pressure. The receptacle is filled for a precisely determined time thereby providing a known amount of air in the receptacle. Through a valving arrangement the receptacle is then evacuated by the pump to be calibrated and the time required to evacuate the receptacle is determined. This permits calibration of the flow rate of the pump under test. An electronic circuit including a microprocessor automatically performs the timing functions and flow rate calculations.

Abstract: A method and apparatus for sensing and signaling a clogged nozzle condition in a spray gun of the type which includes a valve located adjacent the nozzle. The gun includes a restrictor located in the liquid flow path upstream of the valve and a pressure transducer located between the restrictor and the valve for measuring pressure drop when the valve of the gun is opened. A pressure drop of less than a predetermined amount is indicative of a clogged nozzle condition.

Abstract: A pneumatic lung analog for simulating spontaneous breathing and for testing of ventilatory devices used with spontaneously breathing patients and a kit for modifying training test lungs for this purpose is provided. The lung analog comprises a frame, a test ventilator, or lung simulator, expansible chamber; and a spontaneous breath expansible chamber disposed on the frame for receiving the output of a ventilatory device and a spontaneous breath generator, respectively. A movable end plate is disposed on the lung simulator and spontaneous breath expansible chambers for concurrent movement therewith when the spontaneous breath expansible chamber is inflated. Transducers are provided for measuring the airway pressure and the volume of air supplied to the lung simulator chamber by the ventilator being tested for determining the performance characteristics of the ventilator, such as the added work of breathing attributable to the ventilator.

Abstract: A testing arrangement for testing injection nozzles in a nozzle holder combination, has a first testing circuit provided with a first pump for a hydraulic pressure medium and arranged for testing nozzles as to the throughflow, and a second circuit provided with a second pump for the hydraulic pressure medium and arranged for testing the nozzles as to the opening pressure, buzzing condition, tightness of nozzle holder combination and if necessary seat tightness and needle play of a nozzle, wherein the circuits are arranged so as to perform testing during operation of the nozzles.

Abstract: Apparatus for periodically testing the operation of safety valves on pressure apparatus or vessels, comprises a load-bearing structure (P) fixedly arranged with respect to the pressure apparatus (R), a thrust generating assembly (7) cooperating with said load-bearing structure (P), and for gripping the safety valve (V) being tested. A dynamometer device (9) cooperates with the thrust generating assembly (7), and measures the force applied by the thrust generator (7) to the safety valve (V).

Abstract: A monitoring system for hydraulic pipelines and/or actuating devices including a volume flow sensor having a toothed rotor similar to that in a toothed rotor motor by which movements of the toothed rotor can be sensed by no-contact detectors which emit electrical pulses in respect of discrete quantities of oil displaced by and equal to the volume of a tooth of the toothed rotor. The system also includes a device by which the pulses are processed with respect to the direction of flow through the volume flow sensor and to the pulse frequency. The system also includes an indicator indicative of current operating conditions and a counter by which, after a limiting frequency has been exceeded, the pulses are counted and upon reaching a specified pre-assigned number of pulses that succeed one another during a period of uninterrupted counting a signal of leakiness is generated.

Abstract: A calibrating device for agricultural sprayers utilizes an elongate, flexible throw-away bag of plastic sheet material having a top portion adapted for attaching to an agricultural sprayer boom and an open interior cavity for collecting the spray from a sprayer dispenser nozzle. A facing wall of the bag has a plurality of indicia thereon to measure the rate of spray for calibration of the nozzles to a correct application setting. The indicia include transverse marks indicating quantity, such as gallons, and longitudinal lines indicating rate.

Abstract: A test probe for collecting test permeate samples from a multiple, reverse-osmosis membrane module, wherein the membrane module has a straight permeate-collection passageway and a plurality of individual, spaced-apart, permeate passageways which permit permeate, from each of a plurality of membranes, to flow into the permeate-collection passageway, and which probe comprises a first outer and a second inner tube concentrically positioned and spaced apart, whereby, on insertion of the test probe into the permeate-collection passageway, the test probe comprises a downstream permeate flow passageway and an upstream permeate flow passageway and a test permeate flow passageway, the test probe having a spacer element at the test end with a radial passageway, and resilient O-rings above and below the spacer element, and a coiled spring to bias the O-rings between an unbiased, nonsealing position and a biased, sealing position, whereby the O-rings extend radially outwardly, to form a seal above and below a test permea

Abstract: A flow rate measuring device for use with liquids or appropriate dry materials, comprising a receptacle calibrated to indicate flow rate (e.g. gallons per minute) rather than static volume, and where a specific sampling period (e.g. 5 seconds) is also specified and which establishes the ratio between the collected volume and the flow rate (e.g. 1/12th) thereby enabling a person to obtain a direct reading of the flow rate from a particular source simply by capturing that flow during the specified sampling period and then noting the level of collected material relative to the calibrations. This invention also provides for the inclusion of additional data such as the average costs related to each flow rate and the potential savings at a lower flow rate. For further convenience, the device of this invention may be manufactured from a flexible plastic material that could be folded flat, thus enabling it to be enclosed in a conventional envelope as for mailing.

Abstract: A calibrating unit for calibrating infusion pumps and the like includes a drop sensor which operates to generate electrical signals in response to the passage of drops through an intravenous set. The calibrating unit operates automatically to count the number of drops sensed by the drop sensor in a measurement interval which can be set to any one of three different durations. At the end of the measurement interval the calibrating unit automatically stops the count. In addition, this calibrating unit includes an optical simulator for driving the drop sensor at a known rate. This optical simulator allows the entire calibrating unit to be checked for accuracy simply and reliably without requiring dripping fluids or the like.

Abstract: A test apparatus for determining the operable condition of fuel level conl valves is presented. A sensor is connected to a fuel line for delivery of a test sample of fuel through the fuel line to a receiving system from a fuel supply source. At least one valve is disposed in the fuel line between the sensor and the fuel receiving system. A plurality of sense lines is connected from the sensor to a flow indicator and a pressure indicator such that simultaneous indication of the visual flow indicator and the visual pressure indicator within respective predetermined limits upon a delivery of the test sample of the fuel prior to delivery of the fuel through the fuel line indicates that the fuel level control valve is not properly operable.

Abstract: A test stand (10) having a principal use for testing a fuel pump and associated governor (24), has a drive shaft (16), an inertial weight (30) operatively associated therewith, and apparatus (56) for selectively engaging and disengaging the inertial weight (30) with the drive shaft (16). This test stand (10) solves the technical problems associated with present test stands, which problems include the inability to maintain a constant drive shaft speed for fuel pump calibration, and also the inability to thereafter rapidly increase or decrease said drive shaft speed for purposes of determining the governor response. The apparatus (56) can accommodate misalignment between the drive shaft (16) and the fuel pump (24). The test stand can also include a spline arrangement (108) which also accommodates misalignment between the drive shaft (16) and a cam shaft (99) of the fuel pump (24).

Abstract: A test in place poppet valve and fitting assembly having a minimal air volume internal configuration is provided for attaching a portable hydraulic test system to a snubber internal hydraulic line. The valve fitting includes structure for connection to the test system. After the valve fitting has been attached to the poppet valve, but before the poppet valve has been opened, a passageway and the interior of the poppet valve are evacuated and filled with hydraulic fluid. A remotely actuated, spring biased probe extends from the fitting through the passageway to engage a poppet for selectively opening the poppet valve. When actuated to an open position, a prong on the probe is inserted into a cavity, and the poppet is supported on the probe. Using the poppet valve and valve fitting, the test system may be attached to a snubber internal hydraulic line 12 without introducing an appreciable amount of air.

Abstract: Apparatus and methods for durability (fatigue) testing of various samples (materials, valves, components and other objects) involves use of a test fixture for clamping a sample to be tested in a closed fluid environment and providing fluid passages on opposite sides of the object to be tested through which a bellows-actuated fluid oscillator causes axial oscillating flow of fluid, causing the sample to undergo repeated bidirectional axial pressures producing flexing in the case of a membrane of elastic material or repeated closing and opening in the case of a valve, etc., in response to oscillation of the fluid in the passages. The device is particularly suited for "blister testing" of elastomers and for life testing of prosthetic heart valves and other valves.

Abstract: The testing apparatus comprises two pressure regulators, two pressure gauges or an optional dual pressure gauge, and valve mechanism. In one embodiment the valve mechanism comprises two valves, namely a power actuated three-way air valve and a power actuated four-way air valve controlled by a mode selector. In an alternative embodiment, the valve mechanism comprises a single three-way air valve controlled by a mode selector. The valves are illustrated in the drawings as solenoid operated valves controlled by electrical selector switches. The testing apparatus has an input line or conduit connectable to two pressure ports of a dual pressure indicator and control unit for pasteurizing equipment. In either embodiment illustrated, actuation of the mode selector places the testing apparatus selectively in tracking or differential test modes.

Abstract: The chemical plotting of boundary layer flows in liquids with the use of uncompacted, coated, anodically oxidized aluminum surfaces is effected using a colored or uncolored liquid or a coating or pointillization with a substance, preferably a dye, soluble in water or organic media and which can be included or adsorbed in the eloxal layer.The process serves to plot boundary layer flows in water, organic media and oils in a wide temperature range.