Did You Know...
...that Charles Goodyear performed some of his experiments on rubber while in debtor's prison? He was there so often he referred to it as his "hotel". Chronically in debt because of poor business sense and ill health, Goodyear depended on the generosity of friends and family. Even after he unlocked the secret to vulcanizing rubber, he was unable to improve his financial situation. When he died, his estate was $200,000 in debt.
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| Number | Title | Issue Date |
| 7802585 | Transducer of an electrical input signal into pneumatic output signals In a transducer of at least one electrical input signal into two separate magnetic output signals for a pneumatic actuator, a pressure input is connected to a source of pressure and a setting unit sets the pneumatic output signals by use of the electrical input sign... | 09/28/2010 |
| 7337806 | Stepper motor driven proportional fuel metering valve A low energy stepper motor driven fuel metering valve (FMV) that eliminates the need for a position sensor is provided. The stepper motor rotates a cam that replaces the flapper valve used in conventional systems. The cam rotation increases the gap between the cam a... | 03/04/2008 |
| 7291114 | System and method of determining an individualized drug administration protocol A system and method for determining an individualized drug dosage is provided. The system includes a metabolic rate sensing means for sensing the metabolic rate of the individual. The system also includes a computing device having a processor, a memory, an input dev... | 11/06/2007 |
| 7290565 | Methods and apparatus for splitting and directing a pressurized fluid jet within a servovalve A jet reflector servovalve includes a flexure tube and reflector that opposes a fluid nozzle and fluid receivers of the servovalve. During operation, the nozzle directs a pressurized fluid jet toward the reflector. The pressurized fluid travels within a second stage... | 11/06/2007 |
| 7252011 | Surface area deposition trap The disclosed pressure transducer assembly includes a housing, a pressure sensor disposed within the housing, a coupling establishing a sealed pathway between the housing and an external source of gas or fluid, and a deposition trap disposed in the pathway. The depo... | 08/07/2007 |
| 7061161 | Small piezoelectric air pumps with unobstructed airflow A T-shaped blade, or one or more hollow tubes, are vibrationally excited by one or more piezoelectric elements to generate an airflow from a free end of the blade or tube(s). The airflow may be directed to, or drawn away from, an electronic component to cool the ele... | 06/13/2006 |
| 6955650 | Metabolic calorimeter employing respiratory gas analysis An indirect calorimeter for measuring the metabolic rate of a subject includes a respiratory connector configured to be supported in contact with the subject so as to pass inhaled and exhaled gases as the subject breathes, a flow pathway, and a hygiene barrier posit... | 10/18/2005 |
| 6939612 | Fluorinated polymer sheets The present invention is in the field of polymer sheet anti-blocking and adhesion control compositions and methods, and more specifically, the present invention is in the field of polymer sheets, for example polyvinyl butyral sheets, having improved anti-blocking an... | 09/06/2005 |
| 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 that after being secured by appropriate fasteners, the torq... | 02/05/2002 |
| 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 vehicle has at least one other device (125,127) which provides a... | 12/12/2000 |
| 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 flowrate a torque for controlling a torque-controlled valve ... | 06/23/1998 |
| 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 of the positioning element, a pre-control system connecte... | 07/29/1997 |
| 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 respective pitch, roll, and yaw receiving chambers which are ... | 07/09/1996 |
| 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 pipe toward a receiver assembly having two receiver ports ... | 06/04/1996 |
| 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 (Ps) and a fluid return (38) at a return pressure (R). The amplifier has at least one fluid connection (34 or 35) t... | 08/22/1995 |
| 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.... | 02/28/1995 |
| 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 passage including an inlet for receiving a pressurized gas... | 08/02/1994 |
| 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 fluidic amplifier includes a fixed ejector and a pair of rece... | 04/19/1994 |
| 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 and opposite sides. A pneumatic nozzle having an opening f... | 06/01/1993 |
| 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 portion of the valve element adjacent its fixed end. An armatu... | 07/28/1992 |
| 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) adjacent to the aperture surface (16) of the fixed aperture plat... | 07/28/1992 |
| 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 respective ports. A single hydraulic input is multiplexed among a ... | 02/18/1992 |
| 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, second and third coaxial bores in the valve body extending tran... | 12/10/1991 |
| 5067512 | 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, movable end, and a conductive coil which surrounds at least a portion of the valve element adjacent its fixed end. An armatur... | 11/26/1991 |
| 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 between the spool and the ejector jet. The spool has a diff... | 07/16/1991 |
| 5012836 | 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 portion of the valve element adjacent its fixed end. An armatu... | 05/07/1991 |
| 5005600 | Servovalve apparatus for use in fluid systems A servovalve apparatus for use in fluid systems which comprises a flexible fluid conduit and a conductive coil which surrounds at least a portion of the conduit adjacent its upstream end. An armature is secured to the flexible conduit so as to be adjacent... | 04/09/1991 |
| 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) whose relative position is variable as a function of the cur... | 08/08/1989 |
| 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 including a fluid jet channel which directs a fluid jet towards... | 01/10/1989 |
| 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 into a closed cabinet or housing having alignment and gui... | 05/10/1988 |
| 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. When one of the bellows is expanded a jet pipe connected to a... | 04/28/1987 |
| 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 spring above the central core. A cover of high magnetic permea... | 01/27/1987 |
| 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 path past the applicator. A pneumatic proximity switch is ... | 09/30/1986 |
| 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 positioned to recover at least a portion of the gas stream. The r... | 08/13/1985 |
| 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 point flags in which the gap sensor controls a pilot actuat... | 03/12/1985 |
| 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 differential between the conditions in the receivers. In ... | 04/17/1984 |
| 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 output signals at the natural frequency.... | 04/10/1984 |
| 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 towards a nozzle. The amount of lift off the backplate and hen... | 01/10/1984 |
| 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 a combined magnetic field resulting from both permanent ma... | 03/29/1983 |
| 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 for supplying an output fluid, and a fluidic mechanical fe... | 01/18/1983 |
