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| Number | Title | Issue Date |
| 7352287 | Pneumatic controller A pneumatic controller for controlling a device. ... | 04/01/2008 |
| 7349745 | Lead-lag input filter arrangement with adjustable initial conditions for electro-pneumatic control loops Systems and methods for urging a valve plug off a seat of a control valve and toward a set point in the absence of significant delay. Adjustable, user-selected input parameters to the input of a lead-lag filter in communication with the input of a control loop facil... | 03/25/2008 |
| 7267137 | Deadweight pressure standards using non-hysteresis sylphons A deadweight pressure standard provides improved measurement accuracy and repeatability. The standard includes a flow regulator having a first valve controlled by a first pair of non-hysteresis sylphons, and a supply regulator having a second valve controlled by a s... | 09/11/2007 |
| 7258640 | Apparatus for compensating viscous characteristics of hydraulic fluid in a hydraulic pressure line An apparatus for compensating the viscous characteristics of a hydraulic medium in a pressure line (10) in which apparatus a pressure nozzle (12) with constant geometry and constant through-flow cross-section is located in the pressure line (10)... | 08/21/2007 |
| 7234483 | Electro-pneumatic air pressure regulator An electro-pneumatic air pressure regulator includes a primary pressure introduction port, a secondary pressure output port, a pilot pressure chamber, a main valve for opening and closing a communicating conduit, a floating piston which actuates the main valve, a no... | 06/26/2007 |
| 7234482 | Servovalve with torque motor The servovalve with torque motor consists of a cylindrical case (3) in which an armature (1) is arranged on one end of an arm (16) and a orifice (18) closing a nozzle (19) with working liquid (2) on the other side of the arm... | 06/26/2007 |
| 7171858 | Semiconductor pressure sensor A semiconductor pressure sensor is intended to achieve reduction in size and cost by decreasing the number of terminals and the number of pads. In the semiconductor pressure sensor, in a first mode in which correction data is input to a memory, a voltage input chang... | 02/06/2007 |
| 7165461 | Pressure gauge having dual function movement plate A pressure gauge comprising a stem having an inlet at which pressure is sensed. A Bourdon tube is coupled to the stem and is displaceable in response to pressure changes at the inlet. A movement comprising a movement plate conducts displacement of the Bourdon tube t... | 01/23/2007 |
| 7134321 | Fluid gauge proximity sensor and method of operating same using a modulated fluid flow A system and method that use a fluid gauge proximity sensor. A source of modulated unidirectional or alternating fluid flow travels along at least one path having a nozzle and a flow or pressure sensor. The fluid exists at a gap between the nozzle and a target. The ... | 11/14/2006 |
| 7133763 | Control apparatus for controlling a plant by using a delta-sigma modulation algorithm The invention provides a control apparatus comprising a controller for determining a manipulated variable for manipulating a controlled object so that an output of the controlled object converges to a desired value and a modulator for modulating the manipulated vari... | 11/07/2006 |
| 7121372 | Lift truck with variable range with at least three wheels A lift truck with variable range with at least three wheels and a telescopic arm. The lift truck includes a steerable rear wheel and two front wheels, a driver station and a motor propulsion group secured to a chassis. The chassis has a compact configuration and is ... | 10/17/2006 |
| 7100455 | System and method for pressure measurement A system and method for pressure measurement may include the ability to readily produce a pressure measurement system. In one general aspect, pressure measurement may include a signal-converting circuit that includes a coupler, a signal biaser, and a signal span adj... | 09/05/2006 |
| 7099235 | Geophone and method of manufacturing a geophone A vibration transducer such as a geophone, comprising a central pole piece (110) with a magnet (112) and coil (118) concentrically arranged around it. The position of the magnet (112) is fixed relative to the pole piece (110) and t... | 08/29/2006 |
| 7021120 | High resolution gas gauge proximity sensor In a gas gauge, effects due to changes in the local environment are reduced by causing a measurement nozzle and a reference nozzle to react as if they were co-located, or located at approximately the same position. This is achieved by venting the reference nozzle in... | 04/04/2006 |
| 7017564 | Temperature-controlled PCV valve A positive crankcase ventilation valve includes a flow restrictor movable in an orifice to vary flow of fumes from a crankcase to an intake manifold in a vehicle. The valve also includes a wax motor for moving the flow restrictor in the orifice. ... | 03/28/2006 |
| 7004128 | Control apparatus for device having dead band, and variable valve system A control unit employed in a variable valve timing apparatus vibrates a control signal for controlling an oil-pressure control valve. If the vibration center of the duty value of the control signal for driving the oil-pressure control valve lies in a dead band, the ... | 02/28/2006 |
| 6979937 | Laser machining of electroactive ceramics Laser beam machining is applied to form arbitrarily shaped electroactive ceramics for transducers (e.g., electromechanical sensors and actuators). One particularly preferred embodiment of the invention comprises machining parallel grooves in a ceramic plate to impro... | 12/27/2005 |
| 6976666 | Electromagnetic valve assembly for controlling airbag An electromagnetic valve assembly for controlling airbags, includes a single valve assembly joined by main valve bodies of two electromagnetic valves each having respective electromagnetic control coils. A ventilation opening of the joined single valve assembly is p... | 12/20/2005 |
| 6959921 | Temperature responsive valve assembly for a pneumatic spring A temperature responsive valve assembly for a gas spring includes a valve body, a seal, a bi-metal valve and a locking member. The valve body includes a flexible radial member defined along the outer periphery of the valve body. Each radial member includes a radiall... | 11/01/2005 |
| 6957656 | Proportional solenoid valve and control method therefor In a proportional solenoid valve, a cylindrical valve seat member includes an input/output-side passage provided between an input port and a drain port and between an output port and the drain port, a seat portion provided in an end portion of the input/output-side ... | 10/25/2005 |
| 6880800 | Pressure regulator A pressure regulator has a magnet component group provided with a metal housing in which a winding and an armature are arranged, a flange composed of a synthetic plastic material and connected in an axial direction to the magnet component group, a metal guiding slee... | 04/19/2005 |
| 6799598 | Solenoid valve circuit for automatic transmission In a two-way solenoid vale, a small diameter portion of a nozzle portion is fitted in a small diameter portion receiving part communicating with an output pressure oil passage and a large diameter portion is fitted in a large diameter portion receiving part communic... | 10/05/2004 |
| 6796322 | Hydraulic pressure regulating valve A hydraulic pressure regulating valve for regulating a pressure in an automatic transmission of a motor vehicle, comprising a magnetic part which includes an electrically controllable coil, a coil core and a movable armature, a valve flange which is anchored on the ... | 09/28/2004 |
| 6755205 | Method to stabilize a nozzle flapper valve A method and apparatus to attenuate a flapper valve from oscillating is presented. An inertia tube is added to the flow path of the flapper valve nozzle, which effectively produces a stabilizing pressure force on the flapper at its natural frequency. The inertia tub... | 06/29/2004 |
| 6467496 | Single-adjustment, dual-null pressure setting for an electrohydraulic valve pilot stage An electrohydraulic valve pilot stage for controlling differential pressure is disclosed. The electrohydraulic valve pilot stage has a housing for protecting the valve; a first and second inlet capable of connection to fluid supplies; a first nozzle and a... | 10/22/2002 |
| 6460558 | Pilot stage or pressure control pilot valve having a single armature/flapper An improved pilot stage includes a flapper having first and second ends, first and second nozzles in fluid communication with the first and second ends, and a magnetic torque motor having a first coil which is magnetically coupled to the first end of the ... | 10/08/2002 |
| 6422532 | Severe service valve positioner A valve positioner for adjusting the position of a valve is provided. The valve positioner includes a housing having a service cartridge port and a valve connector. The valve positioner also includes a removable service cartridge having a cartridge housin... | 07/23/2002 |
| 6397875 | Pressure regulating method The pressure of hydraulic fluid which is supplied to the continuously variable transmission in the power train of a motor vehicle is regulated by an apparatus wherein an adjustable pilot valve can receive fluid from a pilot conduit leading to a pressure r... | 06/04/2002 |
| 6378545 | Electromagnetically actuatable hydraulic proportional valve An electromagnetically actuable proportional hydraulic valve (10) is described, which is distinguished in particular by a constant, low-wear operating performance. This is attained by means of a closing member (60) having an approximately conical sealing ... | 04/30/2002 |
| 6295511 | Apparatus for controlling and monitoring actuators with an open/close characteristic An apparatus for controlling and monitoring actuators with an open/close characteristic consists of a first unit having a drive switch unit for operating a drive force unit, at least one limit signal generator that detects an end position of an actuator o... | 09/25/2001 |
| 6202670 | Piezoelectric actuated poppet value to modulate pilot pressures and control main valve activation A piezoelectric actuated poppet valve is disclosed. The piezoelectric valve generally includes a valve body having multiple passages that provide fluid flow paths through the valve body. Flow through the flow paths is controlled by the position of a poppe... | 03/20/2001 |
| 6202669 | Self-aligning valve A valve, for example a valve for use in conjunction with a pneumatic pressure controller for controlling a load pressure in a volume, comprises an apparatus for aligning a pressure control valve such that a seal between at least one input port and a flapp... | 03/20/2001 |
| 6196249 | Pressure regulating method and apparatus The pressure of hydraulic fluid which is supplied to the continuously variable transmission in the power train of a motor vehicle is regulated by an apparatus wherein an adjustable pilot valve can receive fluid from a pilot conduit leading to a pressure r... | 03/06/2001 |
| 6079435 | Current to pressure converter An electropneumatic motor includes an electrically energizable magnetic circuit with an armature resiliently suspended in the air gap defined between two opposed pole pieces of differing dimensions. One of pole pieces includes an axially adjustable member... | 06/27/2000 |
| 6032923 | Fluid valves having cantilevered blocking films A cantilever valve useful for paper handling applications is disclosed. The valve can be batch fabricated in two dimensional valve arrays, with each valve in the array being controlled by passive matrix addressing. Typically, each valve includes a valve h... | 03/07/2000 |
| 6019120 | Single stage variable force solenoid pressure regulating valve A solenoid actuated valve for regulating the pressure of a pressurized fluid in a fluid control system in proportion to the current level of an electrical input signal including a nozzle housing having an end connected to a solenoid housing and a fixed fl... | 02/01/2000 |
| 5967172 | Electric vacuum regulator valve An electric vacuum regulator has an enclosure containing an interior space and a solenoid assembly. An inlet port communicates the interior space to source vacuum. Vacuum communicated to the interior space is vented through a filter to atmosphere. Regulat... | 10/19/1999 |
| 5965950 | Device for controlling the injection location of washer solution A washer solution hose controlling device includes a car speed sensor and an electronic control device outputting a control signal in proportion to the car speed detected from the car speed sensor. The washer solution hose controlling device further emplo... | 10/12/1999 |
| 5906218 | Electric-to-pressure converters A relatively compact and vibration-insensitive electric-to-pressure converter includes an annular flexure from which an annular electromagnetic coil depends into an annular gap defined by the pole pieces of a permanent magnet assembly. A compressed air ex... | 05/25/1999 |
| 5873946 | Installation and a process for lubricating, cleaning and/or disinfecting conveyor belts An installation for lubricating, cleaning and/or disinfecting conveyor belts for containers, more particularly for foods, such as bottles, glasses, cans, bags and the like, comprising a central metering station connectable to a water pipe used to dilute a... | 02/23/1999 |
