Electrically Operated (275) (361) Patents (Class 91/459)
  • Patent number: 10443631
    Abstract: A downforce controller for an agricultural implement having a double-acting hydraulic cylinder. The cylinder is configured to be coupled to an agricultural row unit and an agricultural toolbar for transmitting a net downforce between the agricultural toolbar and the agricultural row unit. A first pressure in the first chamber of the cylinder and a second pressure in the second chamber of the cylinder having counteracting effects on the net downforce. A manifold coupled to the cylinder is in fluid communication with the first chamber. A pressure control valve supported by the manifold is in fluid communication with the manifold and the first chamber.
    Type: Grant
    Filed: January 29, 2018
    Date of Patent: October 15, 2019
    Assignee: Precision Planting LLC
    Inventors: Jason Stoller, Kent Levy, Todd Swanson
  • Patent number: 10359062
    Abstract: A downforce controller for an agricultural implement having a double-acting hydraulic cylinder. The cylinder is configured to be coupled to an agricultural row unit and an agricultural toolbar for transmitting a net downforce between the agricultural toolbar and the agricultural row unit. A first pressure in a first chamber of the cylinder and a second pressure in a second chamber of the cylinder have counteracting effects on the net downforce. A manifold coupled to the cylinder is in fluid communication with the first chamber. A pressure control valve coupled to the manifold is in fluid communication with the manifold and the first chamber.
    Type: Grant
    Filed: August 28, 2017
    Date of Patent: July 23, 2019
    Assignee: Precision Planting LLC
    Inventors: Jason Stoller, Kent Levy, Todd Swanson
  • Patent number: 9879702
    Abstract: A downforce controller for an agricultural implement having a double-acting hydraulic cylinder. The cylinder is configured to be coupled to an agricultural row unit and an agricultural toolbar for transmitting a net downforce between the agricultural toolbar and the agricultural row unit. A first pressure in the first chamber of the cylinder and a second pressure in the second chamber of the cylinder having counteracting effects on the net downforce. A manifold coupled to the cylinder is in fluid communication with the first chamber. A pressure control valve supported by the manifold is in fluid communication with the manifold and the first chamber.
    Type: Grant
    Filed: July 25, 2013
    Date of Patent: January 30, 2018
    Assignee: Precision Planting LLC
    Inventors: Jason Stoller, Kent Levy, Todd Swanson
  • Patent number: 9746007
    Abstract: A downforce controller for an agricultural implement having a double-acting hydraulic cylinder. The cylinder is configured to be coupled to an agricultural row unit and an agricultural toolbar for transmitting a net downforce between the agricultural toolbar and the agricultural row unit. A first pressure in a first chamber of the cylinder and a second pressure in a second chamber of the cylinder have counteracting effects on the net downforce. A manifold coupled to the cylinder is in fluid communication with the first chamber. A pressure control valve coupled to the manifold is in fluid communication with the manifold and the first chamber.
    Type: Grant
    Filed: September 28, 2015
    Date of Patent: August 29, 2017
    Assignee: Precision Planting LLC
    Inventors: Jason Stoller, Kent Levy, Todd Swanson
  • Patent number: 9683585
    Abstract: A hydraulic driving system includes a hydraulic pump, a driving source, a hydraulic cylinder, a closed circuit hydraulic path between the pump and cylinder, a pump-flow-rate control unit controlling a discharge flow rate of the pump, a flow rate control valve between the pump and the cylinder in the fluid path, a directional control unit, a target flow rate setting unit and a control device. The directional control unit allows a flow of fluid from the pump to the cylinder and prohibits a flow of fluid from the cylinder to the pump when fluid is supplied from the pump to the cylinder via the flow rate control valve. The control device controls fluid flow to the cylinder with the flow rate control valve when the target flow rate is within a prescribed range, and with the pump-flow-rate control unit when the target flow rate is greater than the prescribed range.
    Type: Grant
    Filed: August 13, 2012
    Date of Patent: June 20, 2017
    Assignee: KOMATSU LTD.
    Inventors: Teruo Akiyama, Noboru Iida, Koji Saito, Takayuki Watanabe, Koji Yamashita
  • Patent number: 9476180
    Abstract: There is provided a hydraulic excavator in which occurrence of minute vibrations in a control lever can be suppressed. A boom-raising proportional solenoid valve is provided in a boom-raising pilot conduit. A boom-lowering proportional solenoid valve is provided in a boom-lowering pilot conduit. A controller controls an opening degree of the boom-lowering proportional solenoid valve based on a pressure generated in the boom-lowering pilot conduit between the control lever and the boom-lowering proportional solenoid valve, and controls an opening degree of the boom-raising proportional solenoid valve. An amount of increase in current per unit time when the controller outputs, to the boom-lowering proportional solenoid valve, an instruction signal for instructing an increase in opening degree is smaller than an amount of increase in current per unit time when the controller outputs, to the boom-raising proportional solenoid valve, an instruction signal for instructing an increase in opening degree.
    Type: Grant
    Filed: December 6, 2013
    Date of Patent: October 25, 2016
    Assignee: KOMATSU LTD.
    Inventor: Takeshi Takaura
  • Patent number: 9364804
    Abstract: According to various embodiments, a microfluidic agitator device may be provided. The microfluidic agitator device may include: an air inlet; an air outlet; an elastic diaphragm provided between the air inlet and the air outlet and configured to oscillate if an airflow from the air inlet to the air outlet is provided; and a chamber coupled to the elastic diaphragm.
    Type: Grant
    Filed: August 26, 2013
    Date of Patent: June 14, 2016
    Assignee: Agency for Science, Technology and Research
    Inventors: Huanming Xia, Zhiping Wang, Wei Wang
  • Patent number: 9115735
    Abstract: The present invention relates to a method of determining the static force developed by a servo-control (10) having an actuator (20) and a hydraulic distributor control valve (30), with the actuator (20) including at least one cylinder (21) and a slidable element (25). The method comprises determining an instantaneous travel speed of the slidable element (25) relative to the cylinder (21) and determining the static force based at least in part on the instantaneous static force developed by the servo-control (10), the predetermined maximum static force, the instantaneous travel speed raised to the second power, and the maximum travel speed of the slidable element (25) relative to the cylinder (21) raised to the second power.
    Type: Grant
    Filed: May 22, 2012
    Date of Patent: August 25, 2015
    Assignee: Airbus Helicopters
    Inventor: Jean-Romain Bihel
  • Patent number: 8915480
    Abstract: Valve actuator system and a system for operation of valves, which valve comprises a valve housing, which valve housing comprises at least one inlet and at least one outlet, which valve housing further comprises a valve closing element, which valve element is mechanical connected to a valve actuator, which valve actuator comprises at least one piston, which piston is moved in a housing by a pressurized fluid in at least one direction, which valve actuator is connected to a control valve which control valve regulates a flow of a liquid medium from a pressure source to a first cavity chamber in the hosing of the valve actuator where the valve is a sanitary valve primarily for regulation of a flow of Fluid food, which valve actuator is activated by a liquid medium.
    Type: Grant
    Filed: September 26, 2008
    Date of Patent: December 23, 2014
    Assignee: Kmatic Aps
    Inventor: Poul Elholm Jakobsen
  • Publication number: 20140352524
    Abstract: A system has an actuator having a rotor or a linear piston, and ports for hydraulic fluid, an electro-mechanical sensor sensing position of the rotor or linear piston, a valve having a 1 plug in a bore of a valve body, the plug having cross bores aligning with passages within the valve body communicating inlet and outlet ports depending on relative position of the plug in the bore of the valve body, a servo motor to move the plug around or along the axis to different positions to align individual ones of the cross bores with individual ones of the passages communicating with individual ones of the ports, and a programmable controller coupled to the electro-mechanical sensor and to the servo motor, the controller enabled to control the servo motor to accomplish programmed movement and position of the rotor or linear piston of the hydraulically-driven actuator.
    Type: Application
    Filed: March 18, 2014
    Publication date: December 4, 2014
    Inventor: Patrick Michael Mullen
  • Publication number: 20140331662
    Abstract: A hydraulic control device for a forklift includes a hydraulic pump, a single electric motor for driving the hydraulic pump, an outflow control mechanism provided between a lift cylinder and the hydraulic pump, a flow control valve provided between the outflow control mechanism and a draining portion, and a controller. When a lowering operation of a fork and either forward or rearward mast tilting operations of a mast are performed at the same time, the controller controls the electric motor based on a target speed of the hydraulic pump. The flow control valve controls the flow rate of hydraulic fluid from the lift cylinder to the hydraulic pump and the flow rate from the lift cylinder to the draining portion in accordance with the difference between the actual rotation speed of the hydraulic pump and the target rotation speed of the hydraulic pump.
    Type: Application
    Filed: December 10, 2012
    Publication date: November 13, 2014
    Applicants: NISHINA INDUSTRIAL CO., LTD., KABUSHIKI KAISHA TOYOTA JIDOSHOKKI
    Inventors: Yuki Ueda, Tsutomu Matsuo, Hirohiko Ishikawa, Tetsuya Goto, Junichi Morita, Toshinari Fukatsu, Akira Nakajo, Ryo Yazawa
  • Publication number: 20140318116
    Abstract: A hydraulic control device includes: a hydraulic pump connected in parallel to steering and boom cylinders; a steering control valve that controls the direction of operating oil flowing through the steering cylinders; a boom control valve that connects the hydraulic pump to a tank when the valve is at a neutral position and controls the direction of the oil flowing through the boom cylinders when the valve is at an offset position; a meter-in pressure compensator that increases flow rate of the oil flowing through a variable restrictor of the steering control valve in accordance with pressure in front of and behind the restrictor; and a bleed-off pressure compensator that decreases flow rate of the oil flowing through the boom control valve in accordance with the increase in pressure of the oil flowing through the steering cylinders to maintain the predetermined pressure of the oil in the steering control circuit.
    Type: Application
    Filed: November 30, 2012
    Publication date: October 30, 2014
    Applicant: KAWASAK JUKOGYO KABUSHIKI KAISHA
    Inventors: Makoto Ito, Ryo Yamamoto, Kazuto Fujiyama, Hiroyasu Kodera, Shinichiro Tanaka
  • Patent number: 8807013
    Abstract: Disclosed is a boom cylinder control circuit for a construction machine including a boom cylinder having an ascending-side chamber and a descending-side chamber. The boom cylinder control circuit includes: a first floating chamber with first and second input ports connected to the descending-side chamber and the ascending-side chamber, respectively, at one side, and first and second output ports connected with the drain tank, at the other side, and is switched to selectively connect the first and second input ports to the first and second output ports in accordance with an operational signal of the floating selection operation part; and a second floating valve of which one side is connected to the first output port and the other side is connected to the drain tank to selectively connect the first output port with the drain tank in accordance with the operational signal.
    Type: Grant
    Filed: November 2, 2009
    Date of Patent: August 19, 2014
    Assignee: Doosan Infracore Co., Ltd.
    Inventor: Won Sun Sohn
  • Patent number: 8794491
    Abstract: An adhesive dispensing module includes a pneumatic actuator for actuating reciprocating movement of a piston on a dispenser valve member. The pneumatic actuator includes a valve element and a pneumatic housing with an inlet chamber, an exhaust chamber, and a piston chamber. The valve element includes a plurality of inlet passages and a plurality of exhaust passages. The valve element rotates from a first position in which the inlet passages deliver pressurized air from the inlet chamber to the piston chamber, to a second position in which the exhaust passages exhaust pressurized air from the piston chamber to the exhaust chamber. The valve element also includes a plurality of fins configured to be driven by an electromagnetic coil to move the valve element.
    Type: Grant
    Filed: October 22, 2012
    Date of Patent: August 5, 2014
    Assignee: Nordson Corporation
    Inventor: Mark A. Gould
  • Publication number: 20140208934
    Abstract: The present disclosure provides a control system of a powered machine. The control system includes a hydraulic motor configured to drive a track system of the machine. The motor is operable with a variable displacement. A control valve is fluidly coupled to the motor. In addition, the control system includes a controller and an electro-hydraulic valve disposed in electrical communication with the controller and fluid communication with the control valve. The electro-hydraulic valve receives a signal from the controller, and based on the signal, the electro-hydraulic valve hydraulically varies the start of control pressure of the motor.
    Type: Application
    Filed: January 29, 2013
    Publication date: July 31, 2014
    Applicant: Deere & Company
    Inventors: Calin Raszga, Matthew J. Ramler, Bryon P. Neumann
  • Patent number: 8763513
    Abstract: A control system for controlling the movement of a system such as a hydraulic servo controlled gimbal systems. The system includes a plurality of actuators and sensors that sense the position of the actuators. On start up, a control system determines the present orientation of the system and compared it to a user defined desired orientation. The system operates in a first mode on start up where the control system moves the actuators so that the system is moved form the present orientation to the desired orientation at a controlled rate. Once the desired orientation is reached, control is then passed to a user controlled device such as a joystick.
    Type: Grant
    Filed: February 2, 2012
    Date of Patent: July 1, 2014
    Inventor: Arnold Peterson
  • Publication number: 20140174751
    Abstract: There is provided a device and method for high speed hydraulic actuation. The method includes adjusting a position of an actuator using a hydraulic pressure regulator. Adjusting the position of the actuator includes increasing pressure on the hydraulic pressure regulator to open the actuator using a first solenoid, or decreasing pressure on the hydraulic pressure regulator to close the actuator using a second solenoid.
    Type: Application
    Filed: July 5, 2012
    Publication date: June 26, 2014
    Inventors: Mario R. Lugo, Ryan D. Fontenot, Syed M. Rashid Ali
  • Publication number: 20140174071
    Abstract: The present invention relates to a hydraulic control system for construction machinery capable of variably adjusting a set pressure of a relief valve, which controls a set pressure of a hydraulic system, according to a value inputted by means of pressure in the hydraulic system or the manipulation of a joystick.
    Type: Application
    Filed: August 9, 2011
    Publication date: June 26, 2014
    Applicant: VOLVO CONSTRUCTION EQUIPMENT AB
    Inventor: Chun-Han Lee
  • Publication number: 20140147293
    Abstract: A hydraulic machine includes a number of piston/cylinder units which are each controlled by valves positioned upstream and downstream. The valves are in turn activated by an electronic regulator to switch the hydraulic machine selectively into a pump operating mode and a motor operating mode. The regulator selectively switches the individual piston/cylinder units or unit groups separately from one another into individually selectable operating modes as a function of certain regulating variables.
    Type: Application
    Filed: September 16, 2011
    Publication date: May 29, 2014
    Applicant: Robert Bosch GmbH
    Inventors: Bjoern Beuter, Alejandro Lopez Pamplona
  • Publication number: 20140130487
    Abstract: A hydraulic driving system includes a hydraulic pump, a driving source, a hydraulic cylinder, a closed circuit hydraulic path between the pump and cylinder, a pump-flow-rate control unit controlling a discharge flow rate of the pump, a flow rate control valve between the pump and the cylinder in the fluid path, a directional control unit, a target flow rate setting unit and a control device. The directional control unit allows a flow of fluid from the pump to the cylinder and prohibits a flow of fluid from the cylinder to the pump when fluid is supplied from the pump to the cylinder via the flow rate control valve. The control device controls fluid flow to the cylinder with the flow rate control valve when the target flow rate is within a prescribed range, and with the pump-flow-rate control unit when the target flow rate is greater than the prescribed range.
    Type: Application
    Filed: August 13, 2012
    Publication date: May 15, 2014
    Applicant: KOMATSU LTD.
    Inventors: Teruo Akiyama, Noboru Iida, Koji Saito, Takayuki Watanabe, Koji Yamashita
  • Publication number: 20140116241
    Abstract: In a electropneumatic field device, an electrical field input and a pneumatic supply input are provided. At least one field output is provided at which a field output signal is output based on a field control signal received via the electrical field input. A group comprising at least two modular components of different functionality is provided and at least one modular slot for occupation with either of said modular components from said group. The at least two modular components of the group and the at least one slot are modularly adapted to one another such that interfaces of the slot and interfaces of either of said modular components in the seat merge into one another when the slot is occupied with either of said modular components so that the modular component which is in the slot is connected to the electrical field input and to the at least one field output.
    Type: Application
    Filed: October 25, 2013
    Publication date: May 1, 2014
    Inventor: Frank Valentin-Rumpel
  • Patent number: 8607917
    Abstract: Provided an electrically-operated hydraulic actuator unit that includes an electrically-operated motor controlled by a control apparatus and actuating a volume adjusting mechanism through driving-side and driven-side arms, and a clutch mechanism in which the driven-side arm presses a contact member against a clutch case so that the driven-side arm is locked when a force from the volume adjusting mechanism is applied to the driven-side arm. The control apparatus can set duties of first to fourth drive signals to be output to the electrically-operated motor in a neutral-side start period, a neutral-side ordinary actuation period, a higher-volume-side start period and a higher-volume-side ordinary actuation period. The duties of the first and fourth drive signals are larger than that of the second drive signal, the duty of the third drive signal is larger than that of the fourth drive signal, and an integrated ON-time of the third drive signal is larger than that of the first drive signal.
    Type: Grant
    Filed: July 21, 2011
    Date of Patent: December 17, 2013
    Assignee: Kanzaki Kokyukoki Mfg. Co., Ltd.
    Inventors: Minoru Kamada, Nobuhiko Ichinose
  • Publication number: 20130298756
    Abstract: A vacuum lock having a main body portion, a cylinder and a piston is described. The cylinder is disposed within the main body portion and has an opening. The cylinder has one or more sealing rings disposed on an inside surface and an air vent opposite the opening. The vacuum lock can further include a piston adapted to fit in the cylinder and guides. The vacuum lock can also include a valve coupled to the air vent.
    Type: Application
    Filed: May 12, 2012
    Publication date: November 14, 2013
    Inventor: Yuriy Zakuskin
  • Patent number: 8573558
    Abstract: A pneumatic actuator air flow control system includes a pneumatic rotary actuator (PRA) and a solenoid air flow control valve (SAFCV). The PRA contains an air reservoir and a vane housing allowing pressurized air to rotate an air-driven vane. The SAFCV includes a flow control valve body (FCVB), a pilot solenoid valve (PSV) and a switch system, wherein the FCVB and the PRA can be connected to direct the pressurized air into the air reservoir, and the PSV is used to control the pressurized air in and out of the PRA to change the vane's rotation movement in the vane housing. Additionally, the switch system allows users to switch between a double-acting and fail-safe operation. When there is no pressurized air and/or electrical power and if an emergent need to open or close the valve, a manual override in the PSV can be used without further installation of a declutchable manual gear operator or external piping when there is no pressurized air and/or electrical power.
    Type: Grant
    Filed: February 17, 2011
    Date of Patent: November 5, 2013
    Assignee: Easytork Automation Corporation
    Inventor: James Wang
  • Patent number: 8573560
    Abstract: The invention provides a vacuum control valve configured to control the vacuum pressure in the vacuum chamber. The vacuum control valve includes a control valve main body, an operation unit, a cylinder, a biasing unit, and a bellofram. The operation unit and the cylinder include a valve opening manipulation chamber and a shutoff load generation chamber. The shutoff load generation chamber is configured to have a common axial center line with the valve opening manipulation chamber and to generate a load applied to the operation unit in a direction for reducing the lift in accordance with a supply of the working fluid. And the shutoff load generation chamber may be formed in an interior of the rod.
    Type: Grant
    Filed: March 6, 2012
    Date of Patent: November 5, 2013
    Assignee: CKD Corporation
    Inventors: Hiroshi Itafuji, Masayuki Kouketsu
  • Publication number: 20130276441
    Abstract: Disclosed is a hydraulic pump for construction machinery for controlling to inhibit one-way driving when compound-operating two-way driving and work devices, such as a boom, to enhance operation efficiency.
    Type: Application
    Filed: December 27, 2010
    Publication date: October 24, 2013
    Applicant: VOLVO CONSTRUCTION EQUIPMENT AB
    Inventors: Sang-Ki Bae, Jae-Hoon Lee, Sung-Yong Jo
  • Publication number: 20130276925
    Abstract: The present invention relates to a pressure regulating device (1), in particular a hand- or foot-operated hydraulic controller for a heavy construction machine, characterised in that it comprises an electrical or electronic means (20) for determining the position of the actuator (18) or the push button (7) including a proportional sensor comprising, on the one hand, a mobile member (21) following the movement of the actuator (18) or a push button (7) and, on the other hand, a contactless means (22) for detecting the position of the mobile member (21) secured to the body (2), as well as an anti-tilting system, a load sensing system for controlling the pressure increase, the idling delivery of the heat engine, or a flow sharing system, comprising such a pressure regulating device (1).
    Type: Application
    Filed: January 9, 2012
    Publication date: October 24, 2013
    Applicant: BOSCH REXROTH D.S.I.
    Inventors: Didier Merletti, Jean-Luc Boudou
  • Patent number: 8549984
    Abstract: Apparatus to increase a force of an actuator having an override apparatus are described herein. An example fluid control system includes a first fluid control apparatus to fluidly couple a control fluid supply source to a control actuator via a first passageway. The control fluid supply source provides a control fluid to move a control actuator member of the control actuator in a first direction or a second direction opposite the first direction when the control actuator is in the operational state. A second fluid control apparatus is in fluid communication with the first fluid control apparatus and is configured to fluidly couple an override actuator to the control actuator via a second passageway when the control actuator is in a non-operational state. The override actuator is operatively coupled to the control actuator.
    Type: Grant
    Filed: December 28, 2009
    Date of Patent: October 8, 2013
    Assignee: Fisher Controls International, LLC
    Inventor: David Anthony Arnold
  • Patent number: 8544263
    Abstract: Construction equipment having an electric control lever is provided, which can intercept a control signal applied to a flow control valve when trouble occurs in the electric control lever or a control unit.
    Type: Grant
    Filed: June 7, 2010
    Date of Patent: October 1, 2013
    Assignee: Volvo Construction Equipment Holding Sweden AB
    Inventor: Dong Soo Kim
  • Patent number: 8523139
    Abstract: A selector valve operating mechanism is provided with operating pistons which are hydraulic pistons connected through an operation link to a spool of a PTO selector valve, an solenoid valve for hydraulically controlling reciprocation of the operating pistons, and a controller which is a control device for transmitting an operation signal to the solenoid valve. Control of operation of the solenoid valve moves the spool through the operating pistons and the operation link to switch the PTO selector valve.
    Type: Grant
    Filed: August 5, 2009
    Date of Patent: September 3, 2013
    Assignee: Yanmar Co., Ltd.
    Inventors: Kunihiko Sakamoto, Nagahiro Ogata, Masaaki Yamashita
  • Publication number: 20130220110
    Abstract: A vehicle body inclination angle regulating unit (17) includes a balancing oil cylinder (10). One chamber of the balancing oil cylinder (10) is connected with an oil tank (5) and an oil source for leveling operation via a first one-way damper valve (8) and an electric controlled switch valve (7), and the other chamber of the balancing oil cylinder (10) is connected with a non-rod chamber of a suspension oil cylinder via an electric controlled shutoff valve (14) and a second one-way damper valve (9). In addition, an automatically-leveling hydropneumatic suspension mechanism includes at least two pairs of suspension oil cylinders (12), vehicle body inclination angle regulating units (17), a vehicle body transverse inclination angle sensor (1) and a control unit (3). Each suspension oil cylinder (12) is correspondingly provided with the vehicle body inclination angle regulating unit (17) including the balancing oil cylinder (10).
    Type: Application
    Filed: May 18, 2011
    Publication date: August 29, 2013
    Applicants: Zoomlion Heavy Industry Science and Technology Co., Ltd., HUNAN ZOOMLION SPECIAL VEHICLE CO., LTD.
    Inventors: Chunxin Zhan, Quan Liu, Yi Li, Yingzhi Li, Qitao Wang
  • Patent number: 8505291
    Abstract: An exemplary hydraulic system includes a digital valve operable to fluidly connect a hydraulic load to a pressure supply, and an orifice disposed in a flow path between the hydraulic load and the digital valve. A digital controller is operably connected to the digital valve. The digital controller stores a target pressure drop across the orifice and is configured to determine an actual pressure drop across the orifice and formulate a control signal based on the target pressure drop and the actual pressure drop. The controller transmits the control signal to the digital valve for controlling the operation of the valve.
    Type: Grant
    Filed: April 13, 2009
    Date of Patent: August 13, 2013
    Assignee: Eaton Corporation
    Inventors: Duqiang Wu, G. Clark Fortune, Aaron H. Jagoda, John Ryan Kess, Thomas J. Stoltz, Paul Brenner, Benjamin Morris
  • Publication number: 20130152292
    Abstract: A liquid-operated actuator assembly includes a valve with an inlet for connection to a source of a liquid, a bi-stable electromagnetic device for operating the valve, and an actuator including a piston in a cylinder. The piston incorporates an actuating member. The cylinder has a chamber on one side of the piston to which the outlet of the valve is connected for receiving the liquid when the valve is opened in order to move the piston and the actuating member to an operative position. An electronic control circuit momentarily energizes the electromagnetic device for operation of the actuating member and to terminate operation of the actuating member.
    Type: Application
    Filed: December 19, 2011
    Publication date: June 20, 2013
    Applicant: Defond Components Limited
    Inventor: Kwok Chiu Yu
  • Patent number: 8459019
    Abstract: A system and method for operating a two-stage, high-pressure pumping system includes a low-pressure pump having an output configured to deliver a hydraulic fluid under a low-pressure at a high-volume to drive a tool associated with the two-stage, high-pressure, pumping system under low load conditions. The system also includes a high-pressure pump having an output configured to deliver the hydraulic fluid under a high-pressure at a low-volume to drive the tool under high load conditions. A pilot-operated device is included that is configured to selectively drive the tool with pressure from at least one of the output of the low-pressure pump and the output of the high-pressure pump. The pilot-operated device receives pilot pressure from the output of the low-pressure pump to control selectively driving the tool with the output of the two stage pump.
    Type: Grant
    Filed: October 30, 2007
    Date of Patent: June 11, 2013
    Assignee: Actuant Corporation
    Inventor: Paul A. Hohensee
  • Patent number: 8443597
    Abstract: There are provided: control valves 22-24 that control flow of pressure oil from the hydraulic source 21 to the hydraulic actuators 15-17; electric lever devices 51-53 that output electrical operation signals, which are drive instructions for the hydraulic actuators 15-17, in correspondence to lever operation; and a control unit 25-30 and 50 that controls the control valves 22-24 in correspondence to the operation signals. When the determination unit determines that an operation signal is not within the normal range, the hydraulic actuators 15-17 are allowed to be driven with flow of pressure oil to the hydraulic actuators 15-17 limited more significantly than in a case where it is decided that an operation signal is within the normal range.
    Type: Grant
    Filed: February 28, 2008
    Date of Patent: May 21, 2013
    Assignee: Hitachi Construction Machinery Co., Ltd.
    Inventors: Hidetoshi Satake, Katsuaki Kodaka, Yuuki Gotou, Yuuji Nagashima, Kazuhiro Ichimura
  • Patent number: 8375842
    Abstract: In an electro-pneumatic system for controlling a double-acting pneumatic actuator having first and second working chambers, first and second preliminary pneumatic control components generate first and second preliminary pneumatic control signals transferred to respective first and second main pneumatic control components having outputs connected to the respective first and second working chambers. An electronic splitter circuit precedes the first and second preliminary pneumatic control components for splitting and inverting an electrical control signal input to the splitter circuit around an electrical mean control value to create first and second mirror-inverted electrical control signals respectively connected to the respective first and second preliminary pneumatic control components.
    Type: Grant
    Filed: October 21, 2009
    Date of Patent: February 19, 2013
    Assignee: Samson Aktiengesellschaft
    Inventors: Stefan Kolbenschlag, Dirk Klee
  • Patent number: 8355820
    Abstract: A testing apparatus is provided for opening and closing a door of an appliance being tested. The apparatus includes a framework; a first actuator attached to the framework, the first actuator having a retracted position and an extended position; a first attaching bar attached to the first actuator and to the door; and a controller for controlling the first actuator such that the first actuator causes the door to move to an open position when the actuator moves from a first one of the extended position and the retracted position to the other of the extended position and the retracted position, and the first actuator causes the door to move to a closed position when the actuator moves from the other of the extended position and the retracted position to the first one of the extended position and the retracted position.
    Type: Grant
    Filed: June 29, 2010
    Date of Patent: January 15, 2013
    Assignee: BSH Home Appliances Corporation
    Inventor: Brandon Kornegay
  • Publication number: 20120312157
    Abstract: A pneumatic system controlling a bath crust breaker includes a cylinder defining a piston chamber. A piston is slideably displaced within the cylinder by pressurized fluid directed to either a piston chamber first portion with respect to the piston or a piston chamber second portion oppositely positioned about the piston. A pneumatic valve system includes a first control valve aligned between first control valve first and second positions, the first control valve first position aligned with the first portion, and in the first control valve second position is aligned with the second portion. A second control valve is aligned between second control valve first and second positions. An orifice between a pressure source and first control valve is sized to control fluid flow rate so a pressure reached in either the first or second portion during a crust breaking cycle is less than a pressure source maximum pressure.
    Type: Application
    Filed: June 13, 2011
    Publication date: December 13, 2012
    Applicant: MAC Valves, Inc.
    Inventor: Gilles Beaulieu
  • Patent number: 8291925
    Abstract: A method for operating a hydraulic actuation system during a pressure sensor malfunction is provided. The hydraulic actuation system includes a pump, a reservoir, a first work-port and a second work-port, a valve system with individual orifices, a pressure sensor system, and a controller for regulating the hydraulic actuation system based on fluid flow demand and on determined pressure differences. The method includes detecting a malfunction of a pressure sensor for the first work-port, closing second and third orifices, and regulating the pump to generate fluid flow corresponding to maximum pressure generated by the pump. The method also includes assigning a value for the difference between pump pressure and the pressure of the subject work-port that is equivalent to a value within an attainable range for difference between the two pressures. Furthermore, the method includes regulating a first orifice and a fourth orifice in response to the fluid flow demand.
    Type: Grant
    Filed: October 13, 2009
    Date of Patent: October 23, 2012
    Assignee: Eaton Corporation
    Inventors: Wade L. Gehlhoff, Chris W. Schottler
  • Publication number: 20120260796
    Abstract: In a reciprocating piston compressor with delivery rate control, the electromagnetic actuating device (3) of the valve lifter (2) has a separate positioning drive (10) for adjusting the working stroke range of the magnetic actuator (5) used, whereby this can be chosen to be small and highly dynamic and only low power losses occur.
    Type: Application
    Filed: April 10, 2012
    Publication date: October 18, 2012
    Inventors: Bernard Spiegl, Tino Lindner-Silwester, Peter Dolovai, Christian Kernbichler
  • Publication number: 20120247864
    Abstract: A solenoid valve device includes: a solenoid valve that includes a solenoid that is supplied with driving current to generate magnetic flux, and a valve element that is moved by the magnetic flux generated from the solenoid; and a control device that controls the solenoid valve. The control device includes an alternating current component in the driving current and supplies the driving current including the alternating current component to the solenoid, and detects an impedance of the solenoid.
    Type: Application
    Filed: March 23, 2012
    Publication date: October 4, 2012
    Applicant: JTEKT CORPORATION
    Inventors: Ryouichi KUBO, Masahiko SAKAMAKI
  • Patent number: 8267004
    Abstract: An adaptable hydraulic control system configured to be used with either open-center or closed-center hydraulic power systems which may include one or more switches, one or more hydraulic circuits to operate a sequence of motions and may include a shunt relief valve to permit operation with an open-center hydraulic innervator control valve(s) powered by wither an open-center system or a closed-center system. Series switches may control a sequence of operation by transitioning between different normal, or default states to act upon and control repositioning of a hydraulic innervator control valve(s) that may itself have normal or default states perhaps such as for forward operational flow, backward operational flow, or neutral pass through flow.
    Type: Grant
    Filed: May 20, 2010
    Date of Patent: September 18, 2012
    Assignee: Lifetime Enterprises, LLC
    Inventor: Arthur Heitz, Jr.
  • Patent number: 8266902
    Abstract: A fluid power valve module has a supply port for fluid and at least one fluid power and more especially pneumatic valve able to be controlled via the control interface of the valve module for control of a fluid power instrumentality by way of power ports on the basis of the supplied fluid. There is a provision such that the valve module comprises at least one switching output integrated in its housing for output of a switching signal for switching a switching means for influencing and more especially deactivating the instrumentality.
    Type: Grant
    Filed: July 21, 2008
    Date of Patent: September 18, 2012
    Assignee: Festo AG & Co. KG
    Inventors: Gerhard Nolle, Jurgen Arbter, Wolfgang Rammler, Michael Koch
  • Patent number: 8191363
    Abstract: A system for controlling motion of a hydraulic actuator on a refuse collection vehicle. The system includes an operator input device configured to produce a proportional electrical signal that is proportional to the degree of motion of the operator input device. The system further includes a proportional pneumatic control valve that is configured to produce a pressurized air control signal in proportion to the proportional electrical signal, and a hydraulic control valve that is configured to selectively control flow of hydraulic fluid to a hydraulic actuator in response to the pressurized air control signal.
    Type: Grant
    Filed: July 25, 2008
    Date of Patent: June 5, 2012
    Assignee: Hartfiel Automation, Inc.
    Inventors: Stephen P. Laumer, Gary Lee Lagro
  • Patent number: 8191456
    Abstract: A method of driving a hydraulic actuator provided with a pressure-controlled proportioning solenoid valve; the method includes the steps of: determining a first open-loop contribution according to a pressurized oil flow rate which crosses the proportioning solenoid valve and according to the desired load pressure inside the actuation chamber; determining a second open-loop contribution according to the desired position of the spool of the proportioning solenoid valve; determining a third closed-loop contribution according to the difference between a desired value of the position of the mobile piston and a real value of the position of the mobile piston; and calculating a desired electric driving current value of the proportioning solenoid valve by means of an algebraic sum of the three contributions.
    Type: Grant
    Filed: November 26, 2008
    Date of Patent: June 5, 2012
    Assignee: Magneti Marelli Powertrain S.p.A.
    Inventors: Alessandro Fusari, Paolo Machetto, Roberto Ragazzi
  • Patent number: 8191455
    Abstract: An electropneumatic actuator system for operating assemblies of an internal combustion engine includes a housing, in which an actuator is movably accommodated, which in turn is configured to be hollow and includes an aeration channel and a deaeration channel. A control slide valve is assigned to the actuator which is operated by a magnetic coil and which aerates, deaerates or closes a pressure chamber of the housing as a function of the relative position of the actuator.
    Type: Grant
    Filed: April 23, 2007
    Date of Patent: June 5, 2012
    Assignee: Robert Bosch GmbH
    Inventors: Michael Baeuerle, Helmut Schneider, Dirk Hoeffken
  • Patent number: 8136644
    Abstract: An electronically-controlled damper arrangement includes a valve assembly. The valve assembly features a valve slide that carries at least two pistons. The first piston controls flow through two separate flow paths while the second piston controls damping provided by the valve slide. The first piston being both axially moveable and radially moveable within a valve housing.
    Type: Grant
    Filed: June 14, 2006
    Date of Patent: March 20, 2012
    Assignee: Ohlins Racing AB
    Inventor: Lars Sönsteröd
  • Patent number: 8109197
    Abstract: A control system for controlling the movement of a system such as a hydraulic servo controlled gimbal systems. The system includes a plurality of actuators and sensors that sense the position of the actuators. On start up, a control system determines the present orientation of the system and compared it to a user defined desired orientation. The system operates in a first mode on start up where the control system moves the actuators so that the system is moved form the present orientation to the desired orientation at a controlled rate. Once the desired orientation is reached, control is then passed to a user controlled device such as a joystick.
    Type: Grant
    Filed: June 18, 2008
    Date of Patent: February 7, 2012
    Inventor: Arnold Peterson
  • Publication number: 20110320041
    Abstract: A testing apparatus is provided for opening and closing a door of an appliance being tested. The apparatus includes a framework; a first actuator attached to the framework, the first actuator having a retracted position and an extended position; a first attaching bar attached to the first actuator and to the door; and a controller for controlling the first actuator such that the first actuator causes the door to move to an open position when the actuator moves from a first one of the extended position and the retracted position to the other of the extended position and the retracted position, and the first actuator causes the door to move to a closed position when the actuator moves from the other of the extended position and the retracted position to the first one of the extended position and the retracted position.
    Type: Application
    Filed: June 29, 2010
    Publication date: December 29, 2011
    Applicant: BSH HOME APPLIANCES CORPORATION
    Inventor: Brandon Kornegay
  • Publication number: 20110308382
    Abstract: An air engine system includes a motor coupled to the drive shaft of an air engine to control the speed of the air engine. The air engine uses compressed air from a compressed air source provided by an air compressor. The air engine may be used on a vehicle, providing a clean environmentally-friendly means of locomotion.
    Type: Application
    Filed: June 16, 2010
    Publication date: December 22, 2011
    Inventors: Christopher M. Huff, Danny Lee Block