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7485163 |
Nozzle and filter-type dust collector
There are provided a nozzle capable of enhancing the straight-advancing capability of jetted fluid to increase the back wash effect of a filter member, and a filter-type dust collector capable of...
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6344702 |
Simplified torque motor
A simplified torque motor which includes a plurality of parts defining appropriate alignment slots and grooves as well as openings for properly positioning the parts with respect to each other so...
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6158969 |
Hydrostatic pump and disable control therefor
A variable displacement hydrostatic pump (11) having its displacement varied by a controller (17) in response to movement of a manual control lever (95) from a neutral position (FIG. 1). The...
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5768883 |
Flowrate control sytem and method
A system and method for controlling fluid mass-flowrate are provided. One embodiment of the method of the present invention essentially comprises generating in response to a requested mass-fluid...
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5651385 |
Servo drive operated by a pressure medium
A device for operating a servo drive having a positioning element controlled by a pressure medium. The device includes an electrical control unit generating a control signal based upon the position...
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5533935 |
Toy motion simulator
A toy motion simulating apparatus for imparting motion to an operator controlled by a hydraulic control valve to proportionally direct hydraulic fluid from pitch, roll, and yaw fluid nozzles to...
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5522301 |
Pressure control valve for a hydraulic actuator
A two stage valve assembly responsive to signals from a control system for supplying pressurized fluid to two load lines. The first stage includes a motor that directs pressurized fluid from a jet...
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5443089 |
Hydraulic amplifiers with reduced leakage at null
An improved fluid amplifier (39) is operatively arranged in a flow path extending between a source (28, 31) of pressurized fluid (P s ) and a fluid return (38) at a return pressure (R). The...
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5392809 |
Hyper-reset pressure controller
A hyper-reset pressure controller which includes two separate feedback paths which results in a substantially smoother and more accurate pressure control.
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5333637 |
Pneumatic instrument particle trap
A transducer which provides a regulated pneumatic output as a function of an electric control input includes a housing, a gas regulator, and a particle trap. The housing has a passage therein, the...
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5303727 |
Fluidic deflector jet servovalve
A deflector jet servovalve including a fluidic amplifier constructed utilizing a plurality of laminae stacked one upon the other and bonded together to form an integral laminated structure. The...
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5215111 |
Method of performance improvement for an I/P servo
A pneumatic servo comprises a motor having a shaft for rotation in response to an electrical signal. A cam is connected to the shaft for rotation therewith. The cam has an outer profiled periphery...
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5133380 |
Pneumatic control valve
A pneumatic control valve (10) including a valve body (12) with fixed aperture plate (14), a movable redirector (18) and a force motor (26). The force motor (26) supports the redirector (18)...
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5133379 |
Servovalve apparatus for use in fluid systems
A servovalve apparatus for use in fluid systems which comprises an elongate flexible valve element having a fixed end and a free, moveable end, and a conductive coil which surrounds at least a...
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5088383 |
Multiplexed hydraulic control system with multiplexing valve having planar port array
A multiplexed hydraulic control system which avoids the use of a rotary multiplexer and thereby allows for random selection of the multiplexed outlet ports and variable dwell times for the...
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5070898 |
Metering valve
A valve including a valve body, a torque motor mounted on the valve body and including an armature, a metering arm connected to the armature and extending into a first bore in the valve body,...
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5031653 |
Differential cylinder pressure gain compensation for single stage servovalve
Pressure gain compensation for a single-stage servovalve of the jet pipe type. The pressure gain compensation is provided by a separate reciprocally mounted spool having a feedback wire connected...
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4855659 |
Electropneumatic position regulator
An electropneumatic position regulator having a current/pressure transducer has, as electric input, at least one coil (11) fed with a current (setting signal), as well as a permanent magnet (16)...
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4796655 |
Fluid control devices
A fluid control device comprising a pivotable member which has a planar major face and is mounted so as to enable pivotal motion about an axis parallel to the major face. The pivotable member...
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4743419 |
On-line film fluorination method
An on-line film fluorination apparatus cooperative with a continuous polymer film extruding apparatus is set forth. In the preferred and illustrated embodiment, a continuous feed film is introduced...
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4660589 |
Optical feedback loop system for a hydraulic servovalve
An optical feedback loop system used in conjunction with an optical hydraulic servovalve. The system uses light energy from a single fiber optic bundle for expanding a gas in a pair of bellows....
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4638830 |
High sensitivity magnetic actuator
An improved magnetic actuator for providing mechanical actuation representative of an input current has a housing that supports a coil surrounding a central core, and includes a diaphragm type...
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4614560 |
Pneumatic adhesive control system
An adhesive applicator receives liquid adhesive from an adhesive supply and has a pneumatically operated valve for controlling the flow of adhesive through the applicator to a sheet driven along a...
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4534376 |
Electric signal to pressure signal transducer
An electric signal to pneumatic signal transducer 10 comprises a nozzle 12 that accepts an input pneumatic supply and expels a gas stream 20. A receiver 16 that is spaced from the nozzle is...
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4503875 |
Gas high-low pressure control apparatus
A gas/oil high-low pressure control apparatus having a helical bourdon tube sensing a gas control pressure and a gap sensor connected to a pressure indicator and rotating between high and low set...
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4442855 |
Fail-safe single-stage servovalve
A single-stage servovalve has a movable member operatively arranged to selectively divide a continuously-discharged fluid jet between two receiver passages. The hydraulic output of the valve is the...
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4441525 |
Fluidic stabilization control
A fluidic system for stabilizing movement of a body subject to oscillation at its natural frequency, such as a tank-mounted gun, with appropriate circuitry and controls for notch filtering control...
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4425509 |
Turboflapper nozzle systems
In a flapper nozzle actuator system a radial outward flow turbine like flapper is used as the flapper. The angular velocity of the turboflapper is used to lift the turboflapper off a backplate...
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4378031 |
Electrohydraulic servovalve
A two-stage miniature electrohydraulic servovalve including an electromagnetic positioner having a flexure tube mounted drive arm secured to and movable with an armature movable in accordance with...
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4368750 |
Ball-type feedback motor for servovalves
A fluidic servovalve is disclosed comprising a pilot stage valve having a pilot output for supplying a control fluid dependent upon a movable element, a boost valve responsive to the control fluid...
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4291716 |
Pilot stage valve
A pilot stage valve is disclosed having a control mechanism for moving an actuating arm in response to an input signal, a jet pipe moved by the actuating arm for issuing a jet of fluid, a sandwich...
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4273149 |
Blind pressure pilot
A blind pressure pilot apparatus provides a supportive base having a pressure responsive bourdon tube mounted on the base for sensing pressure within a connected test vessel. A pair of indicating...
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4170244 |
Pressure tight valve seat for valves consisting of two opposing tubes
In fluid jet transfer valves comprising two opposing jet tube openings with high pressure fluid flowing out of one opening towards the other, the end surfaces of the jet tubes are provided with a...
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4141376 |
Digital servovalve drive
A digital system for producing a bipolar rectangular waveform of fixed frequency having a duty cycle proportional to the magnitude of an input digital word is provided to drive a servovalve. The...
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4112960 |
Variable-gradient spring sub-assembly
A range spring sub-assembly providing a variable gradient with minimum hysteresis for the feedback assembly of a pneumatic transmitter. The sub-assembly is constituted by a helical spring whose...
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4029979 |
Fluidic to electric transducer and method
The subject transducer consists basically of a flexible element, such as a wire, formed and supported to vibrate at a frequency depending, in part, upon the tension of the element. Means are...
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4003396 |
Proportional control closed circuit gas admission system
Partial pressure of oxygen in a closed gas-containing system is controlled automatically. Unique electro-mechanical transducers employ electric meter movements to vary the angle of a surface in a...
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3999381 |
Position control of jet pipe in missile attitude control system
A pure fluid interface device for proportional linear control of high temature, high pressure, hot gas flow from the exhaust of a rocket motor. The interface device receives the hot gas by direct...
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3993101 |
Tristable fluidic device
An electrofluidic transducer which utilizes an electromagnetic device that is energizable by electric currents of opposite polarity to shift a fluid beam in opposite directions away from a central...
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3990824 |
Film size control apparatus for the blown film process
Apparatus for regulating the flow of refurbishing gas or air internally to tubular film produced by the blown film process, comprising a pair of opposed arm means or arms adapted to physically...
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3986856 |
Blowing apparatus having individual control of nozzles
A laminated stack has grooves on the faces of the laminations forming fluid amplifiers and control channels therefor. Pneumatic detectors are coupled with the control channels. The laminations are...
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3976089 |
Sensing device
There is provided a device for sensing small movements of an object from its desired orientation or position. The device uses for its operation a working fluid, such as air, and comprises means for...
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3965918 |
Electro-fluidic signal converter
An electro-fluidic signal converter has a body provided with an inlet and two outlets for pressure fluid. The body is composed of a pair of outer non-magnetic plates and a plurality of...
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3942558 |
Torsional reed reference fluidic oscillator
A torsional reed reference fluidic oscillator operating within 0.1% of the desired frequency over a temperature range of -65° to +165°F and an operating pressure of from 1 to 4 psi. The...
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3939857 |
Dual piezoelectric fluid jet transfer valve
A dual piezoelectric fluid jet transfer valve having two opposing piezoelectric tubes that can carry fluid. One end of each tube is clamped to provide cantilever action. The free ends of the tubes...
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3934603 |
Fluidic upstream control of the directional flow of a power jet exiting a fluidic power nozzle
A fluidic device having a plenum chamber, an input port to the chamber for receiving a supply of gas, and a power nozzle contiguous with the plenum chamber for generating a power jet. Means is...
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3927694 |
Fluidic computational device
The subject device consists of a fluidic amplifier having a reaction chamber, a nozzle for directing a fluid beam into the chamber, at least one output port across the chamber from the nozzle, a...
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3908471 |
Fluidic jet positioner
A frictionless fluid-mechanical transducer system for establishing and maintaining the position of a fluid jet nozzle within a pressure chamber. A very small force, applied to a lever external to...
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3906979 |
Electro-fluidic/hydrofluidic transducer
This transducer has a fluidic amplifier with a fluid beam forming nozzle in spaced relation from output ports and a pin movable in the space between the nozzle and output ports to vary the fluid...
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3878866 |
Electro-hydraulic transducer amplifier with a plurality of control inputs, and associated methods
A hydraulic transducer comprises in a single unit and in a single casing an electromagnetic motor with a magnetic circuit and a control circuit each having a respective plurality of coils for...
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