Electroviscous Or Electrorheological Fluid Patents (Class 188/267.1)
  • Patent number: 10310605
    Abstract: A system for haptic feedback for steering system controls includes a touch sensor input detection module and an actuator haptic response driver module. The touch sensor input detection module acquires a touch sensor input from one or more touch sensors of a steering system and identifies a touch gesture type of the touch sensor input. The actuator haptic response driver module determines a desired haptic feedback associated with the touch gesture type and controls a steering system actuator to produce a haptic response based on the desired haptic feedback.
    Type: Grant
    Filed: November 15, 2016
    Date of Patent: June 4, 2019
    Assignee: STEERING SOLUTIONS IP HOLDING CORPORATION
    Inventor: Ashok Chandy
  • Patent number: 10257929
    Abstract: A variable stiffness film, a variable stiffness flexible display, and a manufacturing method thereof may include a lower electrode, a variable fluid, and an upper electrode. A polymer layer may be formed on the lower electrode, and a variable fluid receiving portion is patterned on the polymer layer. A variable stiffness layer is formed by putting a variable fluid in the variable fluid receiving portion. The upper electrode is formed on the variable fluid layer.
    Type: Grant
    Filed: August 7, 2014
    Date of Patent: April 9, 2019
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Soo Chul Lim, Joon Ah Park, Hyun Jeong Lee, Seung Ju Han
  • Patent number: 10166832
    Abstract: A performance-variable bushing includes an inner support element and an outer support element. An elastomeric connecting element extends between and operatively connect the inner and outer support elements such that a substantially fluid-tight seal is formed therebetween. The elastomeric connecting element can be at least partially formed from one of an electrorheological elastomeric material and a magnetorheological elastomeric material. The performance-variable bushing includes a variation-inducing element operatively associated with the elastomeric connecting element and selectively operable to vary values of one or more physical properties of the elastomeric connecting element. The elastomeric connecting element is configured for use under a pre-load force from pressurized gas within a spring chamber of an associated gas spring and damper assembly. Gas spring and damper assemblies and suspension systems are also included.
    Type: Grant
    Filed: July 31, 2015
    Date of Patent: January 1, 2019
    Assignee: Firestone Industrial Products Company, LLC
    Inventor: Brian S. DeBruler
  • Patent number: 10088009
    Abstract: A vibration dampening mount assembly includes a housing, resilient material, a sleeve and a restricting structure. The resilient material is fixedly attached to an interior surface of the housing and defines a first chamber and a second chamber. The sleeve is disposed within the housing and is centrally attached to the resilient material. The restricting structure between the first chamber and the second chamber includes a first portion attached to the housing and a second portion attached to the sleeve. In response to movement of the sleeve relative to the housing, the second portion of the restricting structure moves relative to the first portion. The first portion and the second portion of the restricting structure define a fluid passageway therebetween. The cross-sectional area of the fluid passageway changes in response to movement of the second portion relative to the first portion.
    Type: Grant
    Filed: December 22, 2016
    Date of Patent: October 2, 2018
    Assignee: Nissan North America, Inc.
    Inventor: Scott Nydam
  • Patent number: 9889740
    Abstract: Cold engine mounts are known to be stiffer than desirable causing vibration from the engine to be more easily transmitted to the engine frame and cabin occupants. A system and method whereby the engine mounts are preheated before engine start is disclosed. In a prior art disclosure, the onboard battery pack is used to preheat. As cold start is the most demanding battery condition, it may be unwise to draw battery current. PHEVs are commonly coupled to an external electrical power supply for overnight charging. If such external power source is available, an indication of imminent engine start can allow engine mount preheat. Such preheat not only prevents much of the engine's vibration to be transmitted to the engine compartment, it also allows operation of fuel economy saving modes such as variable displacement when some of the engine's cylinders are turned off, a condition which exacerbates engine vibration.
    Type: Grant
    Filed: May 26, 2017
    Date of Patent: February 13, 2018
    Assignee: Ford Global Technologies, LLC
    Inventor: Aed M Dudar
  • Patent number: 9809908
    Abstract: Microscale and nanoscale tubular structures are provided including rheological fluids in their interior volume and including at least one electroactive component. Multiple tubular structures are provided, including simple hollow tube structures; core/shell structures, wherein the tube includes a tubular outer shell with a core extending axially therein; concentric tube or coaxial tube structures, wherein the tube includes a tubular outer shell and one or more concentric tubes extending axially therein; and core/concentric tube structures, wherein concentric tubes further include a core extending axially therein, thus having a core and two or more tubes surrounding the core. The tubular structures are formed by electrospinning and special spinnerets are provided. The tubular structures form fabrics for beneficial uses.
    Type: Grant
    Filed: January 20, 2014
    Date of Patent: November 7, 2017
    Assignee: University of Akron
    Inventor: Shing-Chung Wong
  • Patent number: 9784333
    Abstract: A method and apparatus for a damper. The damper comprises a fluid chamber having a piston dividing the chamber into a compression and rebound sides, a reservoir in fluid communication with the compression side of the chamber, and an isolator disposed between the compression side and the reservoir, whereby the isolator obstructs fluid flow between the compression side and the reservoir. In one embodiment, a bypass provides a fluid path between the compression side and the isolator.
    Type: Grant
    Filed: June 13, 2016
    Date of Patent: October 10, 2017
    Assignee: Fox Factory, Inc.
    Inventor: John Marking
  • Patent number: 9662952
    Abstract: A vibration damper for damping spring retraction and extension forces on vehicles includes an inner pressure medium cylinder, in which a piston with a piston rod is axially slidably arranged to divide the inner cylinder into a retraction chamber and an extension chamber in which an electrorheological fluid is contained as a pressure medium. The two chambers are connected through at least one throttle gap between the inner cylinder and an electrode tube arranged coaxially thereto. The electrode tube is surrounded coaxially by an outer tube which forms a gas pressure chamber connected with the retraction chamber through a bottom valve. Axially linear or helical seals are arranged between the inner cylinder and the electrode tube, and divide the throttle gap into at least two valve partial gaps. A throttled non-return valve opens toward the gas pressure chamber between the extension chamber and the gas pressure chamber.
    Type: Grant
    Filed: December 20, 2013
    Date of Patent: May 30, 2017
    Assignee: Hitachi Automotive Systems Europe GmbH
    Inventors: Joachim Funke, Matthias Bruns, Nils Herrmann, Lucien Johnston, Dorothea Adams
  • Patent number: 9625000
    Abstract: A spring-damper system for use in bearings or as a damper, in particular as a spring-damper system in active engine bearings includes a coupling device which can be coupled to a load and to a supporting device at a bearing or damping point, in order to mount the load in such a way that it can vibrate on the supporting device. The coupling device is designed to transmit a load input generated by the load substantially without loss to a spring-damper device and to absorb a reaction thereto by the spring-damper device and to feed said reaction back to the load, in order to counteract the load input in a vibration-damping fashion. In this context, the spring-damper device can be arranged and/or is arranged spatially separate from the bearing or damping point.
    Type: Grant
    Filed: September 26, 2014
    Date of Patent: April 18, 2017
    Assignee: MAN TRUCK & BUS AG
    Inventor: Joerg Hoffmann
  • Patent number: 9566715
    Abstract: Systems and methods relating to a clutch system for use in controllably transmitting torque from an input shaft to an output shaft. The clutch system has a torque transmission fluid that has a viscosity that changes based on the strength of an electromagnetic field passing through the fluid. A number of sensors are placed at different radial locations on the torque transmission disks to detect the strength of the electromagnetic field. Based on the strength of the electromagnetic field, the amount of torque being transmitted from the input shaft to the output shaft can be adjusted. Also disclosed is a distributed actuation architecture that uses this clutch system. The distributed actuation architecture allows for the use of a single drive motor in conjunction with multiple instances of the clutch system to actuate a mechanical linkage, such as a robotic arm.
    Type: Grant
    Filed: September 30, 2014
    Date of Patent: February 14, 2017
    Assignee: THE UNIVERSITY OF WESTERN ONTARIO
    Inventors: Mehrdad Kermani, Alex Shafer
  • Patent number: 9422997
    Abstract: A micro-nano fluid damper includes a sleeve, a piston assembly and a micro-nano fluid. The sleeve has an accommodating space. The piston assembly has a piston head and at least one piston rod. The piston assembly is movably disposed in the accommodating space. The piston rod extends out of the sleeve from a side of the piston head. The micro-nano fluid is filled between the sleeve and the piston assembly, and the micro-nano fluid flows in the accommodating space by the back-and-forth movement of the piston. When a shear strain rate of the micro-nano fluid is greater than 1s?1, an exponent of velocity of the micro-nano fluid damper is less than 1, and the micro-nano fluid has a shear thinning threshold and a shear thickening threshold.
    Type: Grant
    Filed: April 28, 2014
    Date of Patent: August 23, 2016
    Assignee: NATIONAL APPLIED RESEARCH LABORATORIES
    Inventors: Fang-Yao Yeh, Kuo-Chun Chang, Tsung-Wu Chen, Chung-Han Yu
  • Patent number: 9403537
    Abstract: A user input activation method comprising operating in a deactivated mode in which a controller refrains from accepting input from a user input device, detecting a first presence condition at a first predetermined location, and detecting a second presence condition at a second predetermined location. The method further comprises changing, when the first presence condition and the second presence condition simultaneously exist, from operating in the deactivated mode to operating in an activated mode in which input from the user input device is accepted by the controller, and refraining from changing while the first presence condition and the second presence condition fail to simultaneously exist, and remaining in the activated mode while the first presence condition continues to exist.
    Type: Grant
    Filed: December 22, 2015
    Date of Patent: August 2, 2016
    Assignee: NISSAN NORTH AMERICA, INC.
    Inventor: Adrian Tan
  • Patent number: 9303709
    Abstract: A shock damper is disclosed. The shock damper may have a variable shear control apparatus through which a shear-thickening fluid may flow. In this manner, the shock damper may compress at different rates for different applied impulse forces, in response to the changing viscosity of the shear-thickening fluid.
    Type: Grant
    Filed: August 11, 2014
    Date of Patent: April 5, 2016
    Assignee: GGODRICH CORPORATION
    Inventors: Enrico Manes, Connie E. Bird, Louis Chiappetta, Jr.
  • Patent number: 9273751
    Abstract: A tie bar assembly includes front and rear units each including inner inserts interconnected with outer inserts with webs of elastomeric material. A pole sub-assembly is disposed between the units. The pole sub-assembly and the units define front and rear fluid chambers containing a magneto-rheological fluid. Fluid orifices are disposed through the pole sub-assembly for flow of the magneto-rheological fluid between fluid chambers. An electromagnet coil generates an electromagnetic field to affect viscosity of the magneto-rheological fluid. A connecting rod connects inner inserts and is slidably disposed through the pole sub-assembly for causing movement of the magneto-rheological fluid between fluid chambers. A displacement sensor detects movement to generate a signal to the electromagnet coil. Front and rear travel cushions are each disposed on the inner inserts for limiting the movement of the inner inserts toward the pole sub-assembly.
    Type: Grant
    Filed: June 4, 2012
    Date of Patent: March 1, 2016
    Assignee: BeijingWest Industries, Co. Ltd.
    Inventors: Stephen Lewis Setty, David John Barta, Brent Wade Fourman, Eric Louis Schumann, Steven E. Pyle
  • Patent number: 9233729
    Abstract: A steering damper control apparatus includes an MR damper having an adjustable steering damping force, a suspension pressure sensor that detects a pressure of a front suspension, a command value output unit that determines a damping force command value according to a pressure change rate of the front suspension based on a detection result of the suspension pressure sensor, and a damper driver that causes the MR damper to generate a damping force corresponding to the damping force command value. At a point of time when steering becomes easily shakable, the damping force corresponding to the damping force command value is generated to prevent shaking of the steering beforehand.
    Type: Grant
    Filed: May 9, 2012
    Date of Patent: January 12, 2016
    Assignee: YAMAHA HATSUDOKI KABUSHIKI KAISHA
    Inventors: Yasunobu Harazono, Masashi Matsuo, Nobuo Hara
  • Patent number: 9115696
    Abstract: A direct drive wind turbine has a a rotor and a generator. The rotor includes a hub and a plurality of blades rotatably mounted on a frame. The generator includes a generator rotor and a generator stator. There are one or more dampers arranged between the rotor and the generator rotor and extending at least partially in an axial direction.
    Type: Grant
    Filed: August 5, 2011
    Date of Patent: August 25, 2015
    Assignee: ALSTOM RENEWABLE TECHNOLOGIES
    Inventor: Arturo Rodríguez Tsouroukdissian
  • Patent number: 9051710
    Abstract: A machine employing controllable mounts and a method for controlling such mounts based on operator input are disclosed. The controllable mount may include a housing, a pin, rheological fluid within the housing and coils provided proximate to the rheological fluid. As current is applied to the coils, the apparent viscosity of the rheological fluid is increased, and in so doing so is the stiffness and damping of the controllable mount. Depending on various factors, the operator may want a particular level of feedback. For example, when fine grading, the operator may want to feel every vibration and thus the controllable mounts should be as stiff as possible. The present disclosure therefore provides the operator with the ability to select the desired level of feedback.
    Type: Grant
    Filed: December 14, 2009
    Date of Patent: June 9, 2015
    Assignee: Caterpillar Inc.
    Inventors: Steven D. Jones, Ronald B. Warnat, Nathan S. Pauli, Lindner J. Timothy
  • Patent number: 9051986
    Abstract: A damper includes a housing that forms a fluidly sealed cavity for receiving a fluid therein. The fluid is configured to change fluid properties as electrical energy is induced. An electrical subsystem provides electrical energy to the fluid, which is monitored with a control subsystem. The method includes inducing the fluid with electrical energy to change the dampening effects of the damper in real time.
    Type: Grant
    Filed: March 15, 2013
    Date of Patent: June 9, 2015
    Assignee: Bell Helicopter Textron Inc.
    Inventors: Brian Modrzejewski, Bryan Judd, Dan Sottiaux, Frank B. Stamps, Emily Schofield
  • Patent number: 9051987
    Abstract: Wear bands for heavy duty struts are disclosed. The wear bands include multiple layers such as a base metal layer sandwiched between an outer layer and an intermediate layer along with a solid lubricant layer disposed opposite the intermediate layer from the base metal layer. The outer layer engages an interior surface of the strut housing, which slidably accommodates a rod. The solid lubricant layer, which is the innermost layer, engages an outer surface of the rod so that the wear band is sandwiched between the rod and the housing and provides a solid lubricant layer for engaging the sliding rod.
    Type: Grant
    Filed: August 14, 2013
    Date of Patent: June 9, 2015
    Assignee: Caterpillar Inc.
    Inventors: Robert David Murray, Seth Johnson, Thomas Kos, Kurt Steven Goslovich
  • Patent number: 8997951
    Abstract: An actively controlled colloidal damper having controllable damping characteristics. The damper has a cylinder (2); a piston (4) reciprocatably guided and supported by the cylinder (2) and forming a closed space (3) in cooperation with the cylinder (2); a porous body (8) having a large number of fine holes and received in the closed space (3); operation liquid (7) received in the closed space (3) together with the porous body (8), flowing into the fine holes in the porous body (8) when the pressure in the closed space (3) is increased, and flowing out of the fine holes when the pressure in the closed space (3) is decreased, and pressure regulation means, such as a servo value (6) and a pump device (10), for regulating the pressure in the closed space (3).
    Type: Grant
    Filed: May 29, 2008
    Date of Patent: April 7, 2015
    Assignee: School Juridical Person of Fukuoka Kogyo Daigaku
    Inventor: Claudiu Valentin Suciu
  • Patent number: 8939459
    Abstract: A suspension fork for a bicycle has a tube system with an inner tube and an outer tube that are movable relative to one another. A damper system with a field-sensitive damping fluid is provided within the tube system. The damper device has a damper chamber that is partitioned to form a first chamber and a second chamber by a movable piston attached to a piston rod. A first throttle valve with a first field generating device and a second throttle valve with a second field generating device enable influencing the first and second throttle valves. First and second switching valves are provided. The first and second throttle valves and the first and second switching valves are interconnected such that in the compression stage there is flow only through the first throttle valve while in the rebound stage the first and second throttle valves are connected in series.
    Type: Grant
    Filed: August 28, 2013
    Date of Patent: January 27, 2015
    Assignee: DT Swiss, Inc.
    Inventors: Stefan Battlogg, Martin Walthert, Michael Kieber, Juergen Poesel
  • Patent number: 8910963
    Abstract: A damper device for a bicycle suspension fork has a magneto-rheological damping medium. A piston partitions a damper chamber into first and second chambers that are connected via a return duct, an adjustable throttle valve, and a transfer duct. A field-generating device generates a magnetic field in a damping duct of the throttle valve. A one-way circuit is provided for the damping medium, with two one-way valves disposed to cause a same direction of circulation of the damping fluid both when the piston rod plunges into and retracts from the damper chamber. A first one-way valves in the piston allows a flow of the damping medium from the second into the first chamber. A second one-way valve in the transfer duct allows a damping medium flow from the transfer duct into the second chamber. The adjustable throttle valve control the plunge and the retraction of the piston rod.
    Type: Grant
    Filed: August 28, 2013
    Date of Patent: December 16, 2014
    Assignee: DT Swiss, Inc.
    Inventors: Stefan Battlogg, Martin Walthert, Michael Kieber, Juergen Poesel
  • Patent number: 8878657
    Abstract: An haptic interface including a knob manipulated by a user, a rotation shaft with a longitudinal axis to which the knob is fixed in rotation, an interaction element with a magneto-rheological fluid in rotation with the shaft, the fluid, a system for generating a magnetic field in the fluid, and a control unit capable of generating orders to the system for generating the magnetic field to modify the magnetic field. The system includes a coil type mechanism generating a variable magnetic field, and a permanent magnet type mechanism generating a permanent magnetic field.
    Type: Grant
    Filed: April 27, 2009
    Date of Patent: November 4, 2014
    Assignee: Commissariat a l'Energie Atomique et aux Energies Alternatives
    Inventors: Florian Periquet, Samuel Roselier, Jose Lozada, Moustapha Hafez
  • Publication number: 20140262645
    Abstract: A damper includes a housing that forms a fluidly sealed cavity for receiving a fluid therein. The fluid is configured to change fluid properties as electrical energy is induced. An electrical subsystem provides electrical energy to the fluid, which is monitored with a control subsystem. The method includes inducing the fluid with electrical energy to change the dampening effects of the damper in real time.
    Type: Application
    Filed: March 15, 2013
    Publication date: September 18, 2014
    Applicant: BELL HELICOPTER TEXTRON INC.
    Inventors: Brian Modrzejewski, Bryan Judd, Dan Sottiaux, Frank B. Stamps, Emily Schofield
  • Patent number: 8800730
    Abstract: A shock absorber for a bicycle or another, at least partly muscle-powered, vehicle has a damper device with a damper housing in which a first and a second damper chamber are separated from one another via at least one damper piston. A piston rod connected with the damper piston extends from the damper piston through the second damper chamber out of the damper housing. The first damper chamber is in communication with the second damper chamber via a flow duct that leads through the piston rod out of the damper housing toward at least one throttling device. The flow duct, at the throttling device, has a damping duct provided with a field-sensitive rheological fluid which, by way of a field generating device disposed at the throttling device, can be exposed to a field of a predetermined strength to influence the pass-through flow of the field-sensitive rheological fluid through the throttling device.
    Type: Grant
    Filed: January 25, 2012
    Date of Patent: August 12, 2014
    Assignee: DT Swiss Inc.
    Inventors: Stefan Battlogg, Martin Walthert, Gernot Elsensohn, Jürgen Pösel
  • Patent number: 8770357
    Abstract: An apparatus of a damper (46) for a bicycle comprising a housing defining a chamber, and a piston, movable in the chamber along a first direction. The apparatus further comprises a controllable means to vary the resistance to movement of the piston in the chamber, a sensor (62), and a controller (58) including a timer. Said sensor measures at least one dynamic quantity and produces an output signal based thereon. Said output signal is received by the controller, and said controller controls said controllable means based on said dynamic quantity as a function of time to control the level of damping. The invention further provides means for manually adjusting the level of rebound damping.
    Type: Grant
    Filed: July 16, 2009
    Date of Patent: July 8, 2014
    Assignee: University of Sheffield
    Inventors: Neil David Sims, David Craig Batterbee
  • Patent number: 8757652
    Abstract: A valve is particularly suited for a movement damping apparatus. The valve has a field-generating device, such as a magnet unit, and a fluid that is subjected to the field, such as a magnetorheological fluid, is pressed through a flow path forming a bottleneck. At the bottleneck the fluid is subject to the field and it changes its flow characteristics in response to the field. The flow path is divided into at least two flow tracks by a partition that forms one or more additional friction surfaces.
    Type: Grant
    Filed: March 15, 2013
    Date of Patent: June 24, 2014
    Assignee: INVENTUS Engineering GmbH
    Inventors: Stefan Battlogg, Jürgen Pösel Poesel, Gernot Elsensohn
  • Patent number: 8684367
    Abstract: Methods and apparatus for regulating the function of a suspension system are disclosed herein. Suspension characteristics often contribute to the efficiency of a suspended system. Depending on the desired operating parameters of the suspended system, it may be desirable to alter the functional characteristics of the suspension from time to time in order to maintain or increase efficiency. The suspension hereof may be selectively locked into a substantially rigid configuration, and the damping fluid may be phase separated and/or cooled to increase damping rate during use (or offset rate degradation). The suspension hereof may generate power usable to achieve any or all of the foregoing or to be stored for use elsewhere in the suspended system or beyond.
    Type: Grant
    Filed: February 7, 2013
    Date of Patent: April 1, 2014
    Assignee: Fox Factory, Incorporated
    Inventor: David M Haugen
  • Patent number: 8682539
    Abstract: A machine employing controllable mounts and a method for controlling such mounts based on machine operation are disclosed. The controllable mount may include a housing, a pin, rheological fluid within the housing and coils provided proximate to the rheological fluid. As current is applied to the coils, the apparent viscosity of the rheological fluid is increased, and in so doing so are the damping and stiffness properties of the controllable mount. With other operations such as roading or working on a flat surface, the feedback afforded by the mounts is not as important as operator comfort, in which case the current applied to the coils can be lowered and thus the mount can be made more relaxed. The machine of the present disclosure identifies the machine operation being performed through sensors, predictive algorithms, implement position, and operator input and sets the current and properties of the controllable mounts accordingly.
    Type: Grant
    Filed: December 14, 2009
    Date of Patent: March 25, 2014
    Assignee: Caterpillar Inc.
    Inventors: Steven D. Jones, Ronald B. Warnat, Brett D. Ellen, Nathan S. Pauli, Michael S. Contratto
  • Patent number: 8632096
    Abstract: Methods and apparatus are provided for attenuating torsional vibration of a steering system. The apparatus can include a housing including a chamber. The housing can be couplable to a rim of a hand wheel of the steering system. The apparatus can include a mass disposed in the chamber of the housing. The mass can have a fixed stiffness. The apparatus can also include a damping fluid disposed in the chamber of the housing. The damping fluid can have a variable stiffness. The apparatus can include a control module that determines a torsional vibration experienced by the steering system and outputs a signal to vary the stiffness of the damping fluid in response to the torsional vibration in substantially real-time.
    Type: Grant
    Filed: October 12, 2012
    Date of Patent: January 21, 2014
    Assignee: GM Global Technology Operations LLC
    Inventors: Shawn G. Quinn, David P. Hamilton, Mark A. Stebbins
  • Patent number: 8632097
    Abstract: Methods and apparatus are provided for attenuating translational vibration in a steering system. The apparatus can include a housing having a fluid chamber, a recess and a mounting bracket that couples the housing to a hand wheel of the steering system. The fluid chamber can be in communication with the recess. The apparatus can include a mass disposed in the recess of the housing, which can have a fixed stiffness. The apparatus can include a damping fluid disposed in the housing so as to flow between the fluid chamber and the recess. The mass can be movable in the damping fluid, and the damping fluid can have a variable stiffness. The apparatus can further include a control module that determines a translational vibration experienced at the hand wheel and outputs a signal to vary the stiffness of the damping fluid in response to the translational vibration in substantially real-time.
    Type: Grant
    Filed: October 12, 2012
    Date of Patent: January 21, 2014
    Assignee: GM Global Technology Operations LLC
    Inventors: Shawn G. Quinn, David P. Hamilton, Mark A. Stebbins
  • Publication number: 20130341843
    Abstract: Shock absorber for an at least partially muscle-powered bicycle having a damper device having a first and a second damper chamber assigned thereto which are hydraulically coupled with one another through a damping valve. In the damping valve a flow duct with a field-sensitive, rheological medium is provided. The damping valve has a field generating device assigned to it which serves for generating and controlling a field intensity in the flow duct of the damping valve. The flow duct comprises in the damping valve a collection chamber which is hydraulically connected with the first damper chamber through a plurality of flow apertures, wherein at least one flow aperture is configured as a through hole and at least one flow aperture, as a closable valve opening provided with a one-way valve. The collection chamber is hydraulically connected hydraulically with the second damper chamber via a plurality of fan-type damping ducts each separated from one another by a fan wall.
    Type: Application
    Filed: June 26, 2013
    Publication date: December 26, 2013
    Inventors: STEFAN BATTLOGG, MARTIN WALTHERT, MICHAEL KIEBER, JUERGEN POESEL
  • Publication number: 20130341138
    Abstract: Shock absorber and method for operating a shock absorber for a bicycle wherein a relative motion of a first and a second component interconnected via a damper device is dampened. The damper device comprises a controllable damping valve having at least one field generating device with which a field-sensitive medium can be influenced for influencing a damping force of the damper device by applying a field intensity of the field generating device. A parameter for the current speeds of the first and second components relative to one another is obtained in real time. For damping, a current field intensity to be set is derived in real time by means of the parameter from a characteristic damper curve and by means of the field generating device the field intensity to be currently set is generated in real time for setting in real time a damping force which results from the predetermined characteristic damper curve at the parameter obtained.
    Type: Application
    Filed: June 26, 2013
    Publication date: December 26, 2013
    Inventors: STEFAN BATTLOGG, MARTIN WALTHERT, GERNOT ELSENSOHN, JUERGEN POESEL
  • Patent number: 8573623
    Abstract: A front fork includes a damper that generates a damping force, a cylinder body that houses the damper, a reservoir formed on an exterior of the cylinder body, a rod body that is inserted into the cylinder body to be capable of advancing and retreating, a piston portion that defines an upper chamber and a lower chamber within the cylinder body, a through hole allows a working fluid to flow from the cylinder body into the reservoir, a flow rate control mechanism that is disposed in the vehicle body side tube to face an upper end opening of the through hole, and applies a resistance to a flow of the working fluid flowing toward the reservoir from the rod body, and a driving mechanism that drives the flow rate control mechanism to adjust an expansion side damping force and a contraction side damping force generated by the damper.
    Type: Grant
    Filed: September 20, 2011
    Date of Patent: November 5, 2013
    Assignee: Kayaba Industry Co., Ltd.
    Inventors: Yuuki Amano, Takahisa Mochizuki
  • Patent number: 8550222
    Abstract: A device for selectively controlling and varying a frictional force level at an interface between two bodies, includes a first contact body having at least one surface, a second contact body having at least one surface in physical communication with the first contact body, and an active material in operative communication with a selected one or both of the first contact body and the second contact body, wherein the active material is configured to undergo a change in a property upon receipt of an activation signal wherein the change in a property is effective to change the frictional force level at the interface between the at least one surface of the first contact body and the at least one surface of the second contact body.
    Type: Grant
    Filed: August 16, 2007
    Date of Patent: October 8, 2013
    Assignee: GM Global Technology Operations LLC
    Inventors: Alan L. Browne, Nancy L. Johnson, Nilesh D. Mankame, William Barvosa-Carter, Norman K. Bucknor, Christopher P. Henry, Geoffrey P. McKnight, Guillermo A. Herrera, Andrew C. Keefe
  • Patent number: 8547191
    Abstract: Damping device to impose a reaction to the displacement of a manual operating device (28), said device comprising at least one chamber containing the magneto-rheological fluid, one or two means of generating a variable magnetic field (6.1, 6.2) in the magneto-rheological fluid so as to modify its apparent viscosity, one element (4) free to move in translation capable of shearing the magneto-rheological fluid and designed to be mechanically connected to the manual operating device (28), said mobile element (4) comprising a blade with a longitudinal axis (Y) comprising holes and/or recesses and/or projections.
    Type: Grant
    Filed: October 13, 2008
    Date of Patent: October 1, 2013
    Assignees: Commissariat a l'Energie Atomique et aux Energies Alternatives, Centre National de la Recherche Scientifique
    Inventors: Xavier Boutillon, Moustapha Hafez, Jose Lozada
  • Patent number: 8453806
    Abstract: A damping device for a two-wheeled vehicle having a first and a second damper chamber which are coupled to one another through a flow connection. The flow connection includes at least one flow valve provided with a damping channel. A magneto-rheological fluid is provided in the damping channel of the flow valve wherein the flow valve includes at least one magnetic device such that the damping channel of the flow valve can be exposed to a magnetic field of the magnetic device. The flow valve further includes at least one spring device. The magnetic device of the flow valve is provided on a valve piston and the valve piston is received in a deflection chamber to resiliently deflect counter to a spring force of the spring device such that the magnetic field of the magnetic device effective in the damping channel depends on the resilient deflection of the valve piston.
    Type: Grant
    Filed: July 20, 2010
    Date of Patent: June 4, 2013
    Assignee: DT Swiss Inc.
    Inventors: Stefan Battlogg, Jürgen Pösel, Gernot Elsensohn, Martin Walhert
  • Patent number: 8430416
    Abstract: A movement damping apparatus has magnetorheological fluid that is pressed through a flow path forming a bottleneck in order to dampen a movement. The flow path is divided into at least two flow tracks by a partition that forms an additional friction surface.
    Type: Grant
    Filed: August 21, 2009
    Date of Patent: April 30, 2013
    Assignee: Inventus Engineering GmbH
    Inventors: Stefan Battlogg, Juergen Poesel, Gernot Elsensohn
  • Patent number: 8397885
    Abstract: A magneto-rheological fluid brake includes a housing, a non-magnetically permeable separating ring, a plurality of magnetically permeable blocks, a plurality of magnetically permeable bars, an axle, an upper magnetically permeable block, a lower magnetically permeable block, and a magneto-rheological fluid. The magneto-rheological fluid is surrounded by a plurality of coils and a plurality of pole coils for increasing the area of magnetic permeability of the magneto-rheological fluid subjected to an applied magnetic field. Accordingly, the magneto-rheological fluid brake demonstrates an enhanced braking force and is free from a complete failure of the braking force.
    Type: Grant
    Filed: May 16, 2011
    Date of Patent: March 19, 2013
    Assignee: National Taipei University of Technology
    Inventors: Yaojung Shiao, Cheng-Yang Chang
  • Patent number: 8393446
    Abstract: Methods and apparatus for regulating the function of a suspension system are disclosed herein. Suspension characteristics often contribute to the efficiency of a suspended system. Depending on the desired operating parameters of the suspended system, it may be desirable to alter the functional characteristics of the suspension from time to time in order to maintain or increase efficiency. The suspension hereof may be selectively locked into a substantially rigid configuration, and the damping fluid may be phase separated and/or cooled to increase damping rate during use (or offset rate degradation). The suspension hereof may generate power usable to achieve any or all of the foregoing or to be stored for use elsewhere in the suspended system or beyond.
    Type: Grant
    Filed: August 25, 2009
    Date of Patent: March 12, 2013
    Inventor: David M Haugen
  • Patent number: 8336413
    Abstract: A power steering apparatus includes a housing defining a chamber. A rack is disposed within the chamber and is moveable along a longitudinal axis. A pinion extends into the chamber for meshing engagement with the rack. A bearing supports the rack relative to the housing and is moveable relative to the housing to re-position the rack relative to the pinion. An adjustment mechanism continuously biases the bearing in response to loosening of the meshing engagement to re-position the rack. A dampener resists the movement of the bearing to slow the re-positioning of the bearing. Preferably, the dampener includes a plastic fluid having a very high viscosity. The plastic fluid is disposed between adjacent moving parts to resist the relative movement between the bearing and the housing.
    Type: Grant
    Filed: April 14, 2008
    Date of Patent: December 25, 2012
    Assignee: Steering Solutions IP Holding Corporation
    Inventors: Tony M. Dodak, Anthony J. Champagne, Michael A. Eickholt, George E. Arlt
  • Patent number: 8292048
    Abstract: An energy absorbing device, in particular a device for single-use occupant protection in vehicles, has a container with a magneto-rheological medium which is forced on impact through a restriction with at least one outlet channel. The flow resistance of the outlet channel may be influenced by a device for generation of a magnetic field.
    Type: Grant
    Filed: June 12, 2008
    Date of Patent: October 23, 2012
    Assignee: Inventus Engineering GmbH
    Inventors: Stefan Battlogg, Jürgen Pösel
  • Publication number: 20120186922
    Abstract: A shock absorber for a bicycle has a damper device with first and second damper chambers. The damper chambers are connected by way of a controllable throttle valve. A changeable electronic unit has a control device for controlling the electrically controllable throttle valve. The control device thereby influences the damper characteristics.
    Type: Application
    Filed: January 25, 2012
    Publication date: July 26, 2012
    Applicant: DT Swiss Inc.
    Inventors: Stefan Battlogg, Martin Walthert, Gernot Elsensohn, Jürgen PöSel
  • Publication number: 20120186921
    Abstract: A shock absorber for a bicycle or another, at least partly muscle-powered, vehicle has a damper device with a damper housing in which a first and a second damper chamber are separated from one another via at least one damper piston. A piston rod connected with the damper piston extends from the damper piston through the second damper chamber out of the damper housing. The first damper chamber is in communication with the second damper chamber via a flow duct that leads through the piston rod out of the damper housing toward at least one throttling device. The flow duct, at the throttling device, has a damping duct provided with a field-sensitive rheological fluid which, by way of a field generating device disposed at the throttling device, can be exposed to a field of a predetermined strength to influence the pass-through flow of the field-sensitive rheological fluid through the throttling device.
    Type: Application
    Filed: January 25, 2012
    Publication date: July 26, 2012
    Applicant: DT SWISS INC.
    Inventors: Stefan Battlogg, Martin Walthert, Gernot Elsensohn, Jürgen Pösel
  • Publication number: 20120186003
    Abstract: Disclosed herein is an energy-absorbing device comprising a first layer; a second layer; the second layer being opposedly disposed to the first layer and in slideablecommunication with the first layer; the first layer and the second layer enclosing a space therebetween; the space being filled with a fluid that has a power law exponent ? of at least about 1.3 when measured in half cell split Hopkinson bar using Equation (3) below: ? ? w ? ma ? ? x = ? ? [ U h ] n = ? ? ? . n ( 3 ) where |?w|max is a maximum shear stress, ? is a shear strain rate, U is a characteristic velocity of the striker wall, h is a thickness of the space, n is a power law dimensional factor that represents an energy dissipating property of the fluid.
    Type: Application
    Filed: January 24, 2012
    Publication date: July 26, 2012
    Applicant: UNIVERSITY OF FLORIDA RESEARCH FOUNDATION, INC.
    Inventors: Ian Michael Heger, Ghatu Subhash
  • Patent number: 8160774
    Abstract: An actuator system for determining a relative height differential between a housing of an actuator assembly and a body of the actuator assembly for a vehicle is provided. The vehicle has a suspension wherein the housing is coupled to a first portion of the suspension, and the body is coupled to a second portion of the suspension. The system comprises a sensor coupled to the inside of the housing, and a target coupled to the outside of the body, the sensor and the target cooperating to form a magnetic field that varies in a manner indicative of the distance therebetween.
    Type: Grant
    Filed: October 15, 2008
    Date of Patent: April 17, 2012
    Assignee: GM Global Technology Operations LLC
    Inventors: Yunjun Li, Chandra S. Namuduri, Nancy McMahon, Robert B. Elliott
  • Patent number: 8055408
    Abstract: A semi-active suspension system that employs magnetically controlled dampers. The semi-active suspension system includes a plurality of sensors that measure vehicle parameters in response to disturbances on the vehicle and provide sensor signals to a central controller. The central controller converts the sensor signals to a flux command signal that is representative of the force on the dampers at each wheel of the vehicle. The flux command signal is sent to a local controller that generates a coil voltage that is applied to a coil within the damper. A flux feedback signal generated by the coil is estimated or measured and is compared to the flux command signal in the local controller to adjust the coil voltage to minimize the difference between the flux command signal and the flux feedback signal to provide a response to the force without a flux delay.
    Type: Grant
    Filed: March 12, 2008
    Date of Patent: November 8, 2011
    Assignee: GM Global Technology Operations LLC
    Inventors: Suresh Gopalakrishnan, Chandra S. Namuduri
  • Patent number: 7997392
    Abstract: A vibration damper, e.g. for damping retraction or extension springing forces on motor vehicles, includes a pressure medium cylinder in which a piston with a piston rod is axially slidably arranged. The piston divides the cylinder into first and second chambers which contain an electrorheological or magnetorheological fluid as a pressure medium. The two chambers are connected with one another through a throttle gap with at least one field generating element arranged adjacent thereto. The length of the throttle gap is divided by a gap intersection point into a first throttle gap section connected with the first chamber, and a second throttle gap section connected with the second chamber. A non-return check valve is arranged in a bypass gap connected parallel to the first throttle gap section between the gap intersection point and the first chamber.
    Type: Grant
    Filed: May 19, 2008
    Date of Patent: August 16, 2011
    Assignee: Fludicon GmbH
    Inventors: Michael Stork, Horst Rosenfeldt
  • Patent number: 7942248
    Abstract: A damper device comprising a first mode having a first level of damping, a second mode having a second level of damping corresponding to a predetermined function, a sensor system having a first output corresponding to a normal position and a second output corresponding to an end stop approaching position, and a control system operable for receiving the first output and the second output and executing the first mode and the second mode. The damper device is operable in the first mode when the control system receives the first output and is operable in the second mode when the control system receives the second output.
    Type: Grant
    Filed: December 31, 2002
    Date of Patent: May 17, 2011
    Assignee: LORD Corporation
    Inventors: Kenneth A. St. Clair, Kenneth R. Boone, Douglas E. Ivers
  • Patent number: 7922202
    Abstract: An energy-absorbing apparatus for occupant protection in vehicles has a receptacle in which a magnetorheological fluid is present, which in the event of an impact is pressed through a flow zone. The apparatus further has a device generating a variable magnetic field and which has a core which is wound with a coil. The magnetic field acts on the magnetorheological fluid in order to regulate the flow properties. The coil together with the core is arranged in the flow zone. The axis of the coil lies perpendicularly to the direction of flow of the magnetorheological fluid, and the flow zone has a sheathing formed of a magnetically conductive material.
    Type: Grant
    Filed: August 24, 2009
    Date of Patent: April 12, 2011
    Assignee: Thyssenkrupp Presta AG
    Inventors: Stefan Battlogg, Gernot Elsensohn, Helmut Kirmsze, Jürgen Pösel