With Signal, Indicator Or Inspection Means Patents (Class 91/1)
  • Patent number: 11015621
    Abstract: A proportional control fluid actuator that is used as a positioning device in applications such as a hydraulic directional control valve. The activating device has a cylinder body attachable to a valve body and has a bore carrying a piston that is coaxially secured to an end of a valve spool. The device is provided with spaced openings in the cylinder body that communicate with the bore therein to introduce fluid to act on opposite sides of the piston. Factory pre-compressed spring means are provided for normally urging the piston and spool to a center position. Since the areas of the fluid pressure applied on both sides of the piston are different (due to a spool on one side of the piston), two pre-compressed springs are used to compensate the area difference to achieve a proportional movement of the spool.
    Type: Grant
    Filed: October 31, 2019
    Date of Patent: May 25, 2021
    Assignee: Air Power Systems Co., LLC
    Inventors: Vinay Kumar Dandamudi, Kenneth E. Thompson, Ryan S. Tietz
  • Patent number: 10928812
    Abstract: In a diagnostic method for a positioning device of a process plant, such as a chemical plant, a food processing plant or the like, which includes an actuator (e.g. pneumatic or electric actuator) with a drive shaft and a positioning armature, such as an actuator valve, with a positioning shaft, the drive shaft and the positioning shaft being connected to each other in a rotationally fixed manner (e.g. by a detachable coupling interface and/or a positive-locking torque coupling, such as a claw coupling), wherein a first measurement signal is detected during a movement of the drive shaft, and the first measurement signal or a derivative of the first measurement signal is evaluated with respect to a step-like change in order to detect a rotational backlash.
    Type: Grant
    Filed: October 18, 2018
    Date of Patent: February 23, 2021
    Inventor: David Wagner-Stuerz
  • Patent number: 10912696
    Abstract: An apparatus is disclosed. The apparatus includes an operating table column head assembly, a patient support surface assembly that is movable relative to the operating table column head assembly, and an actuating cylinder configured to move the patient support surface assembly relative to the operating table column head assembly, the actuating cylinder including a piston rod. A first gear rack is attached to the operating table column head assembly and a second gear rack is attached to the patient support surface assembly. A gear assembly is disposed on the piston rod of the actuating cylinder. The gear assembly engages with the first gear rack and the second gear rack. The first gear rack and the second gear rack move in substantially opposite directions relative to the gear assembly, when the actuating cylinder is actuated.
    Type: Grant
    Filed: May 27, 2016
    Date of Patent: February 9, 2021
    Assignee: MAQUET GMBH
    Inventors: Martin Staudinger, Guido Koch
  • Patent number: 10830044
    Abstract: A system and method for remotely locating a communication error support for hydraulic supports. The system includes a control panel, a support controller, a data converter, and two support drivers of the same type. Each support driver has two bus interfaces. The control panel transmits a control command to the data converter in a form of a WiFi signal. The data converter converts the WiFi signal into a message signal and transmits the message signal to the support controller. The support controller transmits the control command to the two support drivers, respectively. The support drivers transmit the command through CANH twisted pairs and CANL twisted pairs. When a bus for transmitting the command of a certain node has an error, the support controller calculates the fault node according to a formula n = p ? t 8 ? m , and feeds back the fault node onto the control panel.
    Type: Grant
    Filed: June 18, 2019
    Date of Patent: November 10, 2020
    Inventors: Chao Tan, Zhongbin Wang, Hongya Zhou, Lei Si, Xinhua Liu, Xuliang Lu, Xiaoyu Li, Bowen Liu, Yue Wu, Honglin Wu
  • Patent number: 10753111
    Abstract: A rod detensioning unit including a gripping unit removal device that engages a gripping unit on a rod, a chair frame configured to engage a rod, a rod tensioning unit that applies tension to an external portion of the rod to remove load from the gripping unit, a load cell unit that measures a tension level applied to the rod by the tensioning unit, a plate gripping unit that engages the rod and secures the chair frame, rod tensioning unit, load cell and plate gripping unit to the rod, a drive unit that engages the gripping unit removal device, and an extension unit affixed to the external portion of the rod when the original external rod length is too short to accommodate the de-tensioning unit.
    Type: Grant
    Filed: May 9, 2017
    Date of Patent: August 25, 2020
    Assignee: VELOCITEL, INC.
    Inventors: Robert Lindyberg, Rakesh Khan, Afshin Karshenas, Brennon Fuqua, Travis Ferguson
  • Patent number: 10745993
    Abstract: Systems and methods for controlling wellsite equipment, including a cementing unit comprising a plurality of sensors operable to generate information related to operational status of the cementing unit and a controller comprising a processor and a memory including computer program code. Communication is established between the cementing unit and the controller. The controller is operable to operate the cementing unit to automatically perform: a pressure calibration of the cementing unit, a pressure test of the cementing unit, an over pressure shut-down test of the cementing unit, a low rate pumping test of the cementing unit, a hydraulic horsepower test of the cementing unit, and/or a mixing test of the cementing unit.
    Type: Grant
    Filed: March 24, 2016
    Date of Patent: August 18, 2020
    Assignee: Schlumberger Technology Corporation
    Inventor: Carlos Urdaneta
  • Patent number: 10480494
    Abstract: A system includes a pump. The pump includes a piston configured to axially reciprocate within a body. The axial movement of the piston activates a first chamber valve and a second chamber valve. The system also includes a main valve configured to direct a flow to the pump to facilitate the axial movement which then transfers a fluid from a reservoir to a spray applicator. The system includes a runaway valve system fluidly coupled to the main valve and configured to detect a runaway state of the pump. The runaway valve system is configured to direct the main valve to stop operation of the pump in response to detection of the runaway state.
    Type: Grant
    Filed: June 28, 2016
    Date of Patent: November 19, 2019
    Assignee: Carlisle Fluid Technologies, Inc.
    Inventor: Christopher Lee Strong
  • Patent number: 10408708
    Abstract: A method is provided for detecting a reciprocal position between a cylinder and a piston of a piston-cylinder unit of a vehicle. The method includes measuring, by means of an optical sensor, a value of an indicative parameter of a color of a reference mark positioned on a portion of the piston. The method also includes comparing the measured value with at least a predetermined threshold value thereof different to a minimum detected threshold of the indicative parameter by the optical sensor; and emitting an alarm signal perceptible by a driver of a vehicle if the measured value is comprised between the threshold value and the minimum value.
    Type: Grant
    Filed: June 12, 2017
    Date of Patent: September 10, 2019
    Assignee: OGNIBENE POWER S.P.A.
    Inventor: Claudio Ognibene
  • Patent number: 10295427
    Abstract: A pressure sensing apparatus with multiple, isolated pressure sensors provided therein. The apparatus includes a base cover portion having multiple sections and each section defines an opening. A sensor is positioned in each base cover portion and a portion of each sensor is exposed to the respective opening. A flanged base is coupled to the base cover portion to define multiple separate chambers and a housing is provided around the base cover portion and base and the housing has multiple conduits in fluid connection with respective cover openings.
    Type: Grant
    Filed: April 4, 2017
    Date of Patent: May 21, 2019
    Assignee: Sensata Technologies, Inc.
    Inventors: Tyler S. Hanna, Nicholas Papadeas, Christopher J. Fontana
  • Patent number: 10267343
    Abstract: Disclosed is a control system for a hydraulic work machine, comprising a plurality of hydraulic work circuits for supplying actuators and/or drive units of movable machine parts with hydraulic fluid, and an emergency stop circuit for the work circuits for avoiding danger caused by the machine parts. According to this disclosure, the emergency stop circuit comprises a single safety valve which is connected in parallel to the work circuits via at least one branch line each at the inlet and to a pressure relief point at the outlet.
    Type: Grant
    Filed: October 20, 2016
    Date of Patent: April 23, 2019
    Assignee: Putzmeister Engineering GmbH
    Inventors: Jan-Martin Veit, Wolf-Michael Petzold
  • Patent number: 10240618
    Abstract: A laser piston position sensor for determining the position of a piston within an accumulator, the laser piston position sensor configured to attach to an end of the accumulator, and the accumulator having an aperture in the end thereof exposing the piston within the accumulator to the laser piston position sensor. The laser piston position sensor including a sensor housing enclosing a cavity containing a low pressure gas, and defining an opening from the cavity toward the accumulator, a laser sensor positioned within the cavity for emitting a laser toward the piston of the accumulator via the opening in the sensor housing and the aperture in the accumulator, and a transparent lens positioned between the laser sensor and the accumulator to allow passage of the laser from the laser sensor to the piston, and to separate gases in the accumulator from gases in the cavity of the sensor housing.
    Type: Grant
    Filed: June 2, 2016
    Date of Patent: March 26, 2019
    Assignee: Hydril USA Distribution LLC
    Inventors: Thomas David Beales, Michael James Connor, Jr.
  • Patent number: 10152661
    Abstract: A method of inserting a data structure into a component using a 3D printer is provided. The method includes providing the data structure having at least one structural parameter associated with the component, converting the data structure into indicia representative of the data structure, and manufacturing the component containing the indicia.
    Type: Grant
    Filed: January 10, 2017
    Date of Patent: December 11, 2018
    Inventor: Brian Kieser
  • Patent number: 10094397
    Abstract: A sensor (S) is provided for determining the stroke of the piston rod (6) of a fluid cylinder, particularly a hydraulic or pneumatic cylinder. The sensor includes a lighting unit for illuminating a code applied on the surface of the piston rod and differing from said surface by color, a first camera unit with a first lens system for recording a first image of the illuminated code in a first scanning window, an evaluation unit for evaluating output signals of the first camera unit, and an interface for issuing the evaluated output signals as information regarding the position of the piston rod. Additionally, a second redundant camera unit is provided with a second lens system, which serves for recording a second image of the illuminated code in a second scanning window.
    Type: Grant
    Filed: September 16, 2016
    Date of Patent: October 9, 2018
    Assignee: Weber-Hydraulik GmbH
    Inventors: Christian Schwab, Volker Jahn, Marcus Schinkel
  • Patent number: 9605589
    Abstract: A method for adjusting a barometric cell may include coupling the barometric cell to a control device via an actuating rod. The actuating rod may be movably mounted on a charging device in any desired position. The method may include applying a freely selectable pressure to the barometric cell so as to bring the actuating rod into contact with a stop, adjusting the barometric cell until a sensor registers a predefined value, and fixing the barometric cell on the charging device.
    Type: Grant
    Filed: January 9, 2012
    Date of Patent: March 28, 2017
    Assignee: Bosch Mahle Turbo Systems GmbH & Co. KG
    Inventors: Jochen Schaeflein, Andreas Gail, Christian Rothe, Stefan Landerer, Anatolij Martens, Jochen Laubender, Stefan Bedoe, Christian Peschke, Jens Kreth, Alina Krause
  • Patent number: 9457781
    Abstract: A braking device, for a motor vehicle brake system. The braking device has at least one movable activation element, at least one device for monitoring the position and movement of at least one activation element, and at least one compressible, electrically conductive device spring which is elastically prestressed between two abutments, wherein at least one of the abutments is of movable design, and the movement of the abutment is coupled at least partially to a movement of at least one activation element. The device spring is provided for moving at least one of the abutments into its unactivated release position. The invention proposes that the device spring be assigned a sensing function for monitoring the position and movement of at least one activation element. A degree of compression of the device spring can be sensed, and the device spring is arranged in an electrically insulated fashion between the two abutments.
    Type: Grant
    Filed: March 20, 2013
    Date of Patent: October 4, 2016
    Assignee: Continental Teves AG & Co. oHG
    Inventor: Jürgen Faller
  • Patent number: 9206822
    Abstract: A device for monitoring the position and movement of a brake pedal for motor vehicles, including a power assist brake actuating unit. The brake actuating unit having a master cylinder fastened to the brake power assist unit, a housing and at least one piston displaceable in a linear manner in the master cylinder, and a position indicator for monitoring the position of the brake pedal. The position indicator transmits signals to a sensor element connected to an electronic control unit. The position indicator is provided on a support coupled to the movement of the control valve housing or to the movable wall that is supported by the control valve housing. The support is guided in a housing of a sensor element, and the housing of the sensor element penetrates in a vacuum-tight manner the power assist unit housing and the housing of the master cylinder having a first housing section.
    Type: Grant
    Filed: July 27, 2011
    Date of Patent: December 8, 2015
    Assignee: Continental Teves AG & Co. oHG
    Inventors: Harald König, Manfred Rüffer
  • Patent number: 9114831
    Abstract: The invention provides a method and a system for moving an element, e.g. a rudder of a ship or a wheel of a vehicle. The element is moved by a hydraulic fluid. According to the invention, an operator indicates a desired movement, and in accordance with the desired movement, at fluid is provided from at least three fluid providers each providing a share of the fluid in parallel streams and only considering the desired movement not the shares provided by the other fluid providers. The invention allows continuation of a steering task even if one fluid provider is disabled, and the invention allows the continuation even without having to notice that one provider is disabled. Accordingly, the invention provides an improvement and simplification relative to the known hydraulic steering systems.
    Type: Grant
    Filed: December 14, 2007
    Date of Patent: August 25, 2015
    Assignee: Danfoss Power Solutions ApS
    Inventors: Preben Albrecht, John Kristensen, Steve Crow, Kjeld Buus Jensen
  • Patent number: 9115732
    Abstract: An actuator including a housing and a force sensing mechanism positioned within an interior of the housing and in operable communication with the actuator, the force sensing mechanism capable of measuring the various forces exerted by or on the actuator without losing any of the energy being transmitted by the actuator. A high precision position sensing mechanism can also be included with the actuator.
    Type: Grant
    Filed: November 19, 2010
    Date of Patent: August 25, 2015
    Assignee: Vecna Technologies, Inc.
    Inventors: Daniel Theobald, Thomas Allen
  • Patent number: 8967035
    Abstract: A sensor coupler adapted to operatively connect a sensor to a piston-cylinder assembly. The sensor coupler includes a first end member and a second end member. The first end member is disposed on a port of the piston-cylinder assembly, in communication with the sensor, and the second end member is disposed in a cylinder chamber of the piston-cylinder assembly. Further, one or more cables are extending between the first end member and the second end member. The one or more cables are configured to transmit signals indicative of a position of a piston in the piston-cylinder assembly to the sensor. The sensor coupler further includes a biasing member to connect the first end member and the second end member.
    Type: Grant
    Filed: May 24, 2012
    Date of Patent: March 3, 2015
    Assignee: Caterpillar Inc.
    Inventor: Michael C. Subrt
  • Patent number: 8939061
    Abstract: Method of indicating the position of a hydraulically actuated armature, comprising an adjust cylinder for actuating the armature, connected by at least one pressure medium line to an adjustment valve through which the pressure medium line can be switched between pressure-causing forward flow and pressure-less backward flow, wherein the flow through the pressure medium line is converted into a number of electric pulses and the number of pulses reflecting the flow is processed in a program in an indicator unit such that the number of pulses occurring in a predetermined adjustment travel when the flow in the pressure medium line is pressure-less is calculated as being the same adjustment travel as when the pressure medium line is switched to be the pressure line.
    Type: Grant
    Filed: August 20, 2008
    Date of Patent: January 27, 2015
    Assignee: Pleiger Maschinenmau GmbH & Co. KG
    Inventors: Michael Middelanis, Stephan Quinkert
  • Publication number: 20150007713
    Abstract: A failure detecting device of a fault detection system includes a detection time calculator, which calculates a stroke time T3 required for a piston to travel between one end and another end of an actuator based on detection signals from a first sensor and a second sensor, a statistical processor that performs a predetermined statistical calculation with respect to the stroke time T3, and a fault response detector, which detects whether or not a fault of the actuator has occurred based on a processing result of the statistical processor.
    Type: Application
    Filed: June 24, 2014
    Publication date: January 8, 2015
    Applicant: SMC CORPORATION
    Inventor: Tomohiko AKI
  • Publication number: 20140345447
    Abstract: A linear actuator assembly (30) having an inner sleeve (100) which moves in a first direction or in an opposite second direction relative to a fixed outer sleeve (90) between a fully extended position and a fully retracted position. The linear actuator assembly (30) also has an emitter (180) and a sensor (184) positioned near the emitter (180) that detect changes in an emitted signal resulting from the movement of the inner sleeve (100) relative to the outer sleeve (90) along a longitudinal axis and a controller (101) electrically coupled to the sensor (184) to determine the axial position of the inner sleeve (100) relative to the outer sleeve (90) along the longitudinal axis.
    Type: Application
    Filed: November 21, 2012
    Publication date: November 27, 2014
    Applicant: Kongsberg Automotive AB
    Inventors: Bengt Cyrén, Bengt Hermansson
  • Patent number: 8869675
    Abstract: In an actuating drive or method for capturing a position of a final control element to be positioned by a drive member of the actuating drive, the final control element is pushed from an initial position to a target position by a spring body acting on the drive member. A first reference position is spatially configured in a vicinity of or at the spring body. A second reference position moving relative to the first reference position during positioning movement of the drive member is spatially configured adjacent a first outer surface of the spring body. A distance between the first reference position and the second reference position is captured.
    Type: Grant
    Filed: April 12, 2011
    Date of Patent: October 28, 2014
    Assignee: Samson Aktiengesellschaft
    Inventors: Joerg Kiesbauer, Stefan Kolbenschlag, Karl-Bernd Schaertner, Frank Valentin-Rumpel
  • Patent number: 8863640
    Abstract: A control system for extending and retracting a ram of a hydraulic coupler for coupling an attachment to an arm of an excavator or back hoe, said control system being adapted to provide an audible and/or visual alert to an operator to indicate a leak of fluid or loss of fluid pressure from said ram and/or from a hydraulic circuit supplying said fluid to the ram. Preferably the control system further comprises a flow sensor for sensing the flow of fluid in a feed line for supplying pressurized fluid to the ram and/or a pressure sensor for sensing the pressure of fluid in said feed line, said control system including at least one indication device for providing said audible and/or visual alert to an operator to indicate a leak of fluid or loss of fluid pressure in response to, or as a function of, the output of the flow sensor and/or the pressure sensor.
    Type: Grant
    Filed: October 15, 2010
    Date of Patent: October 21, 2014
    Assignee: Hill Engineering Limited
    Inventors: Ian Hill, Nick Elwell
  • Publication number: 20140305298
    Abstract: A pneumatic drive and a method for acquiring the power of a pneumatic drive are specified. A piston is movably disposed in a working space and coupled to a path transducer. A pressure sensor is provided for acquiring an internal pressure of the working space. An evaluation unit of the pneumatic drive is adapted to process the value of a path distance of a movement of the piston acquired by the path transducer as well as a variation of the internal pressure in the working space acquired by the pressure sensor. The variation of the internal pressure is associated with the movement of the piston in the working space. Based on these values, a power of the pneumatic drive can be determined.
    Type: Application
    Filed: April 10, 2014
    Publication date: October 16, 2014
    Applicant: Bürkert Werke GmbH
    Inventors: Klaus Beck, Sebastian Frank, Andreas Ungerer
  • Patent number: 8833234
    Abstract: A cylinder includes a piston moving in a cylinder housing fastened to a cylinder rod and rotatable about a cylinder longitudinal axis, and a position sensor comprising a sensor magnet and a sensor element, which interacts with the sensor magnet and which is configured to detect a cylinder rod position relative to the cylinder housing. The sensor magnet is fastened on the cylinder rod rotatably with respect to the cylinder rod and is guided non-rotatably with respect to the cylinder housing.
    Type: Grant
    Filed: February 4, 2009
    Date of Patent: September 16, 2014
    Assignee: WABCO GmbH
    Inventors: Jens-Thorsten Gronau, Mike Heurich, Christian Seestädt, Tino Wiggers
  • Publication number: 20140246284
    Abstract: An actuator arrangement for a motor vehicle drivetrain, in particular for a dual-clutch arrangement. A first fluid cylinder is connected via a first fluid connection to a fluid supply device. A second fluid cylinder is connected via a second fluid connection to the fluid supply device. A pressure measuring arrangement has a single pressure sensor which is connected by means of a connecting arrangement to the first fluid connection and to the second fluid connection.
    Type: Application
    Filed: May 9, 2014
    Publication date: September 4, 2014
    Inventors: Stefan Rothvoss, Klaus Eckweiler, Ralf Trutschel
  • Publication number: 20140230643
    Abstract: An actuator displacement measuring system in an electro-hydraulic system for a construction machine is disclosed, which can detect an actuator displacement using the characteristics of an electro-hydraulic system. The actuator displacement measuring system includes controlling driving of an electric motor, determining whether the electric motor is driven, determining whether a set pressure value of a relief valve is larger than or equal to a measured pressure value of the hydraulic system if a displacement value of an actuator that is always detected deviates from a zero value of a reference position, setting the actuator displacement value to a previous value if a pressure value of the hydraulic system is larger than or equal to a pressure value of a relief valve and calculating the actuator displacement value using a rotating speed of the electric motor.
    Type: Application
    Filed: October 11, 2011
    Publication date: August 21, 2014
    Inventor: Ji-Yun Kim
  • Publication number: 20140138890
    Abstract: A fluid pressure cylinder and a clamp device that, when an output member arrives at a prescribed position such as, in particular, an advance limit position or a retraction limit position, are capable of detecting the position of the output member on the basis of change of air pressure as, due to an opening/closing valve mechanism, the communication state of an air passage within the clamp main body is changed over together with the operation of the output member.
    Type: Application
    Filed: August 2, 2012
    Publication date: May 22, 2014
    Inventor: Takayuki Kawakami
  • Publication number: 20140096675
    Abstract: Pressure piston actuators and systems for control of wastegate in a turbocharger pressure that include the pressure piston actuators are disclosed. The pressure piston actuator includes a housing defining a chamber and a pathway leading to the chamber, a piston disposed within the chamber, a rod connected to the piston by a ball-and-socket joint, and a spring disposed in the chamber to bias the piston, and hence the rod, into a retracted position. Then, when fluid is introduced into the chamber, the fluid applies pressure to the piston. Once the pressure overcomes the bias of the spring, the piston, and hence the rod, moves into an extended position. For the system, the pressure piston actuator has the connector on the end of the rod opposite the ball-and-socket joint connected to the valve portion of a wastegate of a turbocharger.
    Type: Application
    Filed: October 3, 2013
    Publication date: April 10, 2014
    Inventors: David Fletcher, Brian Graichen, Stuart Kirby
  • Patent number: 8677884
    Abstract: A hydraulic motor 10 of the invention includes a detected unit 52 formed on an outer circumferential surface of a cylinder block 14 and a rotation sensor 50arranged opposed to the detected unit 52 for detecting the detected unit 52. The rotation sensor 50 is provided on a position corresponding to a position between a deepest portion 41 of a cylinder hole 29 and a rear end face 28 of the cylinder block in an axial direction of the cylinder block. A fan driving device 60 is provided with the hydraulic motor 10, a bracket 61 to which the hydraulic motor is attached in a state in which a tip end of the rotational shaft 13 is arranged on a surface side thereof through a through-hole 64 and a fan 62 attached to the rotational shaft 13 and is driven by the hydraulic motor.
    Type: Grant
    Filed: December 22, 2008
    Date of Patent: March 25, 2014
    Assignee: Komatsu Ltd.
    Inventors: Kenichi Ogasawara, Kazuhiro Maruta, Mutsumi Ono
  • Publication number: 20130233165
    Abstract: A reciprocating pump assembly includes a pump housing that houses a crankshaft. Pistons are mechanically connected to the crankshaft for pumping fluid through cylinders. Each cylinder has a fluid inlet and a fluid outlet. The pump also has a monitoring housing connected to the reciprocating pump. Within the monitoring housing is a computer with memory. Pressure sensor assemblies sense a pressure value of a fluid within the pump, and are in electrical communication with the memory. An accelerometer positioned on the pump measures vibrations of the pump and is also in electrical communication with the memory for storage of sensed vibrations or displacements during operations. A proximity sensor in electrical communication with the memory is located within the pump housing to determine the rotational velocity of the crankshaft.
    Type: Application
    Filed: April 19, 2013
    Publication date: September 12, 2013
    Applicant: S.P.M. Flow Control, Inc.
    Inventors: Mark D. Matzner, Russell D. Kight
  • Patent number: 8516945
    Abstract: The present invention relates to a piston-cylinder unit with a piston with adjoining piston rod, which is movably mounted in a cylinder, wherein the piston and the piston rod have a cavity into which at least one rod protrudes, by means of which an electrically conductive connection can be made directly or indirectly.
    Type: Grant
    Filed: August 27, 2009
    Date of Patent: August 27, 2013
    Assignee: Liebherr-Werk Ehingen GmbH
    Inventor: Erwin Morath
  • Publication number: 20130192453
    Abstract: The invention provides a motor-driven movement system for moving a movable element, the system comprising at least two actuators, each provided with means connecting it to the movable element and each dimensioned to be capable, on its own, of driving the movable element, a central control unit being connected to the two actuators in order to be capable of sending a position setpoint (Pos1, Pos2) to one or other of the actuators. According to the invention, the system further comprises control means for simultaneously controlling both actuators in terms of force in response to the position setpoint sent to one of the actuators. The invention also provides a method of driving such a system and a method of testing such a system.
    Type: Application
    Filed: October 18, 2011
    Publication date: August 1, 2013
    Inventor: Franck Bonny
  • Patent number: 8459173
    Abstract: A bidirectional hydraulic system for operating table is disclosed, which has a switch valve connecting a bidirectional hydraulic pumping device with movable units of an operating table. The switch valve is driven by a motor, and has a valve block defining at least three outbound valve positions on the valve block's top surface, which is parallel to the inside bottom of the base, which the valve block is attached to, and thereof for controlling oil inlet and oil outlet. The switch valve switches among the outbound valve positions for respectively forming oil passages between the bidirectional hydraulic pumping device and hydraulic cylinders of the movable units.
    Type: Grant
    Filed: July 10, 2009
    Date of Patent: June 11, 2013
    Assignee: Amtai Medical Equipment, Inc.
    Inventor: Jyh-Wei Liang
  • Patent number: 8453441
    Abstract: A system and method for controlling the movement of an implement of an earthmoving machine. The system includes a hydraulic actuator adapted to move the implement. A variable displacement pump is coupled to the actuator for delivering a pressurized fluid to and receiving pressurized fluid from chambers within the actuator. A sensor generates an output based on the position of the actuator's piston or piston rod, and a controller controls the displacement of the variable displacement pump in response to the output of the sensor by executing an algorithm to reduce the flow rate of the fluid to and from the actuator's chambers and thereby reduce the velocity of the piston as it approaches an end of a piston stroke thereof and prevent the piston from impacting the actuator at the end of the piston stroke.
    Type: Grant
    Filed: November 5, 2009
    Date of Patent: June 4, 2013
    Assignee: Purdue Research Foundation
    Inventors: Christopher Alan Williamson, Monika Marianne Ivantysynova
  • Patent number: 8365652
    Abstract: An adjusting element with a closed first end, a cylinder, a piston displaceably arranged in the cylinder that divides the cylinder into a first work space remote of the first end and a second work space in proximity to the first end, and a piston rod which is arranged at one side of the piston and which projects through the first work space and is guided out of the cylinder concentric to or center longitudinal axis of the cylinder at a second end opposite from the first end so as to be sealed by a guiding and sealing device. The adjusting element has a device for detecting the piston rod position and/or the extended length of the adjusting element. The device for detecting the piston rod position includes a microswitch arranged at the cylinder and at least one switching element cooperating with the microswitch.
    Type: Grant
    Filed: July 31, 2009
    Date of Patent: February 5, 2013
    Assignee: Stabilus GmbH
    Inventor: Thomas Ehre
  • Patent number: 8322470
    Abstract: Configurations are provided for vehicular robots or other vehicles to provide shifting of their centers of gravity for enhanced obstacle navigation. Various head and neck morphologies are provided to allow positioning for various poses such as a stowed pose, observation poses, and inspection poses. Neck extension and actuator module designs are provided to implement various head and neck morphologies. Robot control network circuitry is also provided.
    Type: Grant
    Filed: December 15, 2011
    Date of Patent: December 4, 2012
    Assignee: iRobot Corporation
    Inventors: Timothy R. Ohm, Michael Bassett
  • Publication number: 20120291622
    Abstract: Provided is a displacement detection device for a variable displacement compressor which has a configuration such that the displacement detection device can estimate the displacement with little effect from external disturbances, and can be used with pistons that do not require a high degree of machining precision, thus allowing for a greater degree of freedom in the shape of the surface to be detected. Also provided is a variable displacement compressor provided with the displacement detection device.
    Type: Application
    Filed: January 18, 2011
    Publication date: November 22, 2012
    Inventor: Hiroshi Ikeda
  • Patent number: 8281705
    Abstract: A method is disclosed for detecting the drive type of an actuator, e.g., a pneumatic actuator, having a positioner for operating a final control element in a process engineering plant. The actuator is connected to the positioner by a mounting set, the positioner comprising an electronic control unit, which uses a microcontroller to receive one or more input signals, and to output actuating signals to control the flow of gas to or from the chambers of a single-acting or double-acting pneumatic drive. The position feedback sensors are equipped with a rotational measuring system. During commissioning of the actuator, the relationship between the drive volumes and the position signal is found and compared with transfer characteristics of known drive types. Where there is a match between the transfer characteristic defined by the value pairs of the given actuator and one of the transfer characteristics of the known drive types, the identified drive type is assigned to the given actuator.
    Type: Grant
    Filed: December 5, 2008
    Date of Patent: October 9, 2012
    Assignee: ABB AG
    Inventors: Thomas Kleegrewe, Stefan Engelke, Andreas Stelter, Wolfgang Scholz, Urs E. Meier, Detlef Pape
  • Patent number: 8240240
    Abstract: A device for detecting the absolute position of a cylinder rod is provided. A cylinder assembly has a cylinder body with a gland member positioned thereof. The gland member has a rod opening extending therethrough. An adjustable sensor is mounted on the gland member, the adjustable sensor being operable to read one or more detectable features of the cylinder rod. The adjustable sensor can be incrementally adjusted relative to the cylinder rod to optimize the gap provided between the adjustable sensor and the cylinder rod, allowing the sensor to detect the motion and absolute position of the cylinder rod. The detectable features may be three tracks of data including first timing data and position data.
    Type: Grant
    Filed: October 31, 2008
    Date of Patent: August 14, 2012
    Assignee: CNH America LLC
    Inventors: Douglas S. Fitzkee, Christopher A. Foster, John Posselius, Chris Brubaker, Justin Ringwald
  • Publication number: 20120118136
    Abstract: A motor control system includes a piston chamber and a piston assembly disposed within the piston chamber to move therein between first and second positions. A magnet is coupled to the piston assembly to move therewith and a sensor is axially mounted with respect to the piston assembly to generate a continuous output signal corresponding to a position of the magnet relative to the sensor. The motor control system also includes a controller for processing the output signal from the sensor to monitor continuously the position of the piston assembly within the piston chamber and for actuating the piston assembly to move in an upstroke toward the first position and in a downstroke toward the second position.
    Type: Application
    Filed: November 16, 2010
    Publication date: May 17, 2012
    Applicant: Illinois Tool Works Inc.
    Inventors: Dieter Bernhard Heerdt, David Michael Folmer
  • Publication number: 20120031089
    Abstract: An axial bearing between a first part and a second part that presses with an axial load against the first part and can rotate around a rotation axis relative to the first part comprising a circular or arc-shaped ridge on the first part centered around the rotation axis, a pressure source for providing pressurized hydraulic fluid on a first side of the circular or arc-shaped ridge, an adjustable gap between the circular or arc shaped ridge and a bearing surface on the second part, wherein the pressurized hydraulic fluid flows through the adjustable gap to a second side of the circular or arc-shaped ridge. In accordance with the invention the circular or arc-shaped ridge or the bearing surface include a ridge chamber for locally creating a larger adjustable gap between the circular or arc-shaped ridge and the bearing surface.
    Type: Application
    Filed: October 20, 2011
    Publication date: February 9, 2012
    Inventor: Peter Augustinus Johannes Achten
  • Patent number: 8100045
    Abstract: A fluid pressure cylinder assembly has a sensor to provide a signal indicating the amount of extension of a piston rod from the cylinder. The sensor includes a sleeve that is fixed relative to a base of the cylinder and passes into a longitudinal bore in the piston rod, and the piston rod carries a sensor core that is in the bore and is secured to the piston rod at an end opposite from a piston on the rod. The core slides on the interior of the sensor sleeve. A connection is provided to the sensor sleeve such that as the core moves relative to the sensor sleeve a signal indicating the amount of movement and the relative position of the cylinder base and the piston rod is provided.
    Type: Grant
    Filed: October 21, 2008
    Date of Patent: January 24, 2012
    Assignee: Clark Equipment Company
    Inventors: Jason Osborn, Daniel Krieger, Darron Carr
  • Patent number: 7992490
    Abstract: A by-pass control system for a meat injection system has a variable speed pump that transports fluid to a meat injection machine. Excess fluid is transported to a by-pass control valve. The valve has a moveable piston disposed therein that separates the valve into a fluid chamber and an air chamber. The piston moves back and forth based on the relationship between fluid pressure and air pressure. Sensors are disposed within or through the lid or the valve to sense the position of the piston. A controller is connected to the sensors and the variable speed pump and adjusts the speed of the pump based on the position of the piston.
    Type: Grant
    Filed: May 19, 2006
    Date of Patent: August 9, 2011
    Assignee: Stork Townsend Inc.
    Inventors: Daniel W. Pfeffer, Michael S. Simpson, Craig A. Smiens
  • Patent number: 7984670
    Abstract: The present invention relates to a hydraulic distributor (2) of a servo-control (1) of an aircraft, the hydraulic distributor comprising main distributor member (10) and emergency distributor member (20) that are coaxial, said emergency distributor member (20) being caused to move by said main distributor member (10) in the event of said main distributor member (10) seizing, said hydraulic distributor being provided with a detector device (60) for detecting said seizing. The detector device (60) is provided with a reed switch (66) and with amplification means (62, 69, 68) for amplifying said movement of the emergency distributor member, said amplification means comprising a lever (62) having a magnetized free end (62?) that activates said reed switch (66) in the event of said emergency distributor member (20) moving.
    Type: Grant
    Filed: May 22, 2008
    Date of Patent: July 26, 2011
    Assignee: Eurocopter
    Inventors: Damien Sequera, Vincent Schwaller
  • Publication number: 20110142688
    Abstract: The invention relates to a pumping device including a pump (1) comprising—a pumping chamber (11) having a variable volume,—an inlet (2) communicating with the pumping chamber (11) and comprising a valve,—an outlet (5) communicating with the pumping chamber and comprising a valve,—an actuator adapted to change the volume of the pumping chamber,—a fluidic pathway comprising said inlet (2), said pumping chamber (11), said outlet (5) and a downstream line (7) situated downstream of the outlet valve,—a pressure sensor (4) for measuring the pressure between the valves of said pathway,—processing means for processing the received pressure data from the pressure sensor (4). The invention also covers a method for detecting a dysfunction in a pumping device as defined above.
    Type: Application
    Filed: October 22, 2008
    Publication date: June 16, 2011
    Inventors: Eric Chappel, Niklaus Schneeberger, Frederic Neftel
  • Publication number: 20110079138
    Abstract: An actuator and sensor assembly comprising respective sensor and actuator housings defining an interior chamber. Clips on the sensor housing engage the actuator housing for coupling the sensor and actuator housings together. The sensor housing includes a wall defining a pocket. A connector with a sensor couples to the sensor housing in a relationship wherein the sensor extends into the sensor housing pocket. A movable piston is located in the interior chamber and a tube thereon defines a receptacle for a magnet located adjacent the pocket. The piston is seated on a flexible diaphragm. An actuator shaft includes one end coupled to the piston and an opposite end coupled to a movable object. A plurality of pins in the actuator housing mount the assembly to a support bracket. The sensor senses changes in the magnetic field in response to changes in the position of the magnet relative to the sensor.
    Type: Application
    Filed: December 8, 2010
    Publication date: April 7, 2011
    Inventors: Willliam D. Storrie, Robert L. Newman, Brian G. Babin, Kevin C. Wolschlager
  • Patent number: 7856918
    Abstract: A pneumatic brake booster 1 comprising: a sealed structure 3 comprising a rigid casing 11 forming a funnel 19 furnished with an opening and a movable wall 13 dividing the sealed structure 3 into a low-pressure chamber 25 and a working chamber 27, a pneumatic piston 5 comprising a boss 31 fixedly attached to the movable wall 13 and mounted so as to slide in the funnel opening, a valve element 33 housed in the boss 31 and a seal 35 positioned between the boss 31 and the funnel 19, an input rod 7 and an output rod 9 coupled on either side of the pneumatic piston 5, and a return spring 37 to return the pneumatic piston 5 to a rest position, the return spring 37 being placed in the low-pressure chamber 25 between an internal surface 45 of the rigid casing and the pneumatic piston 5, and a force sensor 39 placed in the low-pressure chamber 25 and subjected to the pressure variations of the return spring 37.
    Type: Grant
    Filed: December 5, 2007
    Date of Patent: December 28, 2010
    Assignee: Robert Bosch GmbH
    Inventors: Yannick Nen, Olivier Bernadat, Bruno Beylerian, Omar Brahmi
  • Publication number: 20100282067
    Abstract: Method of indicating the position of a hydraulically actuated armature, comprising an adjust cylinder for actuating the armature, connected by at least one pressure medium line to an adjustment valve through which the pressure medium line can be switched between pressure-causing forward flow and pressure-less backward flow. wherein the flow through the pressure medium line is converted into a number of electric pulses and the number of pulses reflecting the flow is processed in a program in an indicator unit such that the number of pulses occurring in a predetermined adjustment travel when the flow in the pressure medium line is pressure-less is calculated as being the same adjustment travel as when the pressure medium line is switched to be the pressure line.
    Type: Application
    Filed: August 20, 2008
    Publication date: November 11, 2010
    Inventors: Michael Middelanis, Stephan Quinkert