Using Diverse Fluids Patents (Class 188/269)
  • Patent number: 10408295
    Abstract: Pressure-sensitive valves are incorporated within a dampening system to permit user-adjustable tuning of a shock absorber. In one embodiment, a pressure-sensitive valve includes an isolated gas chamber having a pressure therein that is settable by a user.
    Type: Grant
    Filed: October 19, 2017
    Date of Patent: September 10, 2019
    Assignee: Fox Factory, Inc.
    Inventors: Dennis K. Wootten, Robert C. Fox, Joshua Benjamin Yablon, David M. Haugen
  • Patent number: 10384769
    Abstract: A landing detection system for a landing gear assembly of an aircraft may comprise a moveable member mechanically coupled between an aircraft wheel and a strut piston, wherein the moveable member is in communication with a strut chamber pressure of the landing gear assembly, wherein the moveable member moves relative to the strut piston in response to a first force applied to the aircraft wheel and the strut piston strokes in response to a second force applied to the aircraft wheel.
    Type: Grant
    Filed: March 6, 2017
    Date of Patent: August 20, 2019
    Assignee: Goodrich Corporation
    Inventor: William E Luce
  • Patent number: 10378608
    Abstract: A temperature-independent rotation damper 100 is presented. A housing 108 and a piston 102, between which a viscous liquid is located in annular gaps 118, 120, rotate one around the other. When the temperature falls, the damping by the viscous liquid increases. This effect is countered by reducing the effective area which constitutes the braking action, or by enlarging the volume in the annular gaps 118, 120. As the drive, a material having a positive expansion coefficient is used, which material drives a piston 132. In this way, the damping of the rotation damper 100 is broadly practically independent of the temperature.
    Type: Grant
    Filed: February 28, 2018
    Date of Patent: August 13, 2019
    Assignee: Lisa Draexlmaier GmbH
    Inventors: Sever Alexandru Haba, Zoltan Bara
  • Patent number: 10337584
    Abstract: A bicycle fork includes a pair of fork leg assemblies, each of the leg assemblies having an upper leg telescopingly engaged with a lower leg. A damping assembly is provided in at least one of the legs. The damping assembly includes lock-out and blow-off compression circuits. These compression circuits are externally adjustable without tools. Furthermore, these two compression circuits may be adjusted independently of each other.
    Type: Grant
    Filed: January 27, 2017
    Date of Patent: July 2, 2019
    Assignee: Fox Factory, Inc.
    Inventors: William M. Becker, Brian Lampman
  • Patent number: 10302168
    Abstract: A hydraulic buffer device includes a first cylinder that stores oil, a rod member capable of being moved with respect to the first cylinder as being inserted into the first cylinder toward a first side of the first cylinder and being protruded outward from the first cylinder on a second side of the first cylinder, a rod guide that covers the second side of the first cylinder as having a through-hole, an oil seal arranged at the outer side of the rod member in the radial direction on the second side of the first cylinder, a groove portion that forms a flow path for oil flowing from the inside of the first cylinder toward the oil seal, and a small-diameter portion that restricts flow of oil flowing through the groove portion. An appropriate amount of fluid is supplied to a seal member in a pressure buffer device.
    Type: Grant
    Filed: April 3, 2015
    Date of Patent: May 28, 2019
    Assignee: SHOWA CORPORATION
    Inventors: Kunio Shibasaki, Tetsuya Shirotani
  • Patent number: 10274039
    Abstract: An oil seal holder for a shock absorber contains: a body, plural push members, and plural resilient elements. The body includes a first semi-circular ring and a second semi-circular ring, and a rear end of the first semi-circular ring is connected with a rear end of the second semi-circular ring. The body also includes a retainer configured to retain with or remove from a front end of the first semi-circular ring and a front end of the second semi-circular ring. The plural push members are mounted and radially move on the first semi-circular ring and the second semi-circular ring, and each push member includes an abutting post extending out of the first semi-circular ring or the second semi-circular ring. The plural resilient elements are connected with the first semi-circular ring and the second semi-circular ring so as to push the plural push member inward.
    Type: Grant
    Filed: December 28, 2015
    Date of Patent: April 30, 2019
    Inventor: Chun Po Huang
  • Patent number: 10197127
    Abstract: A monotube damper assembly includes a housing presenting a wall extending between a rod end and a closed end to define a main chamber. A gas cup having a top portion and a body portion is disposed in the main chamber to divide the main chamber of the housing into a gas chamber and a fluid chamber. The gas cup includes a top portion and a body portion. A piston is disposed in the fluid chamber. A rod guide is disposed adjacent to the rod end and spaced part from the piston. A piston rod is connected to the piston. A gas damper having a cylindrical shape includes a restrictor disposed the body portion of gas cup and the top potion of the gas cup for providing additional damping force to the gas cup.
    Type: Grant
    Filed: March 6, 2014
    Date of Patent: February 5, 2019
    Assignee: BeijingWest Industries Co., Ltd.
    Inventor: Michael William Hurtt
  • Patent number: 10132379
    Abstract: In one embodiment, a gas spring having a travel control includes positive and negative chambers and a valve mechanism that controls the fluid communication between the chambers. The valve mechanism includes a valve bore that while only moving a small amount, allows for large changes in gas spring travel length.
    Type: Grant
    Filed: August 15, 2016
    Date of Patent: November 20, 2018
    Assignee: Fox Factory, Inc.
    Inventors: Joseph Franklin, Robert C. Fox
  • Patent number: 10100568
    Abstract: An electromechanical strut for moving a closure member between open and closed positions relative to a vehicle body includes a housing having an inner surface bounding a cavity extending along a central axis between opposite first and second ends. A power screw is disposed in the cavity in operable communication with a motor, with a gear assembly operably connecting the motor to the power screw. An extensible member has an outer cover tube received in the housing cavity and a drive mechanism for converting rotary motion of the power screw into linear motion of the extensible member. An annular gap extends between the inner surface of the housing and an outer surface of the outer cover tube. An annular bushing is disposed within the annular gap to minimize laterally play between the housing and the outer cover tube.
    Type: Grant
    Filed: July 21, 2016
    Date of Patent: October 16, 2018
    Assignee: MAGNA CLOSURES INC.
    Inventors: Joseph Scheuring, Wieslaw Nowicki
  • Patent number: 10094441
    Abstract: An electromechanical actuator (10), comprising a movable member (14) provided with connecting means (20) and translationally movable with respect to a frame (12), and an energy absorbing-dissipating structure (28, 30) located on a strain path between said connecting means (20) and said frame (12) and comprising a porous capillary matrix (40) having an apparent porosity and an associated liquid (42) having a wetting angle higher than 90 degrees relative to said matrix (40) and selected such that part of said liquid (42) penetrates the pores of said matrix (40), when said chamber is subjected to a pressure equal to or higher than a first pressure level P1, and is spontaneously rejected off the pores of said matrix (40) by capillary action, when said structure is subjected to a pressure lower than a second pressure level P2 itself lower than said first pressure level P1.
    Type: Grant
    Filed: October 22, 2012
    Date of Patent: October 9, 2018
    Assignee: ASTRIUM SAS
    Inventors: Thierry Abensur, Gérald Pignie, Alizée Vergnol, Susana Perez-Diago
  • Patent number: 10082371
    Abstract: The present disclosure relates to a shooting range which is movable or transportable so as to enable it to be operated at different locations as desired. The shooting range disclosed comprises of at least one open ended tubular element, a target assembly comprising at least one target and is placed at a rear end of the tubular element. The shooting range comprises of a wall means placed behind the target for resisting penetration by projectiles and to inhibit rebounding of projectiles there from. The shooting range comprises of a plurality of supporting frames for holding the open ended tubular element and wall means and further comprises a tray at the bottom of the wall means for collecting the residues.
    Type: Grant
    Filed: September 26, 2015
    Date of Patent: September 25, 2018
    Inventors: Ashok Atluri, Ravi Kumar Midathala
  • Patent number: 10072722
    Abstract: Disclosed herein is a single shock body equipped with the gas permeable internal floating piston. The gas permeable internal floating piston was specifically designed for installation in the multiple stage air shock, the gas permeable internal floating piston being disclosed in the parent application. The gas permeable internal floating piston automatically separates the oil from the gas within the shock body thereby significantly reducing the complexity and cost of manufacturing a shock absorber with the gas permeable internal floating piston. Also, separation is maintained during the operation of the shock throughout the shock's lifetime. The gas permeable internal floating piston can operate with oils derived from either petroleum or synthetic base stocks, additives, and various gases including dry air, nitrogen, oxygen, carbon monoxide, carbon dioxide, helium, neon, and argon.
    Type: Grant
    Filed: August 9, 2017
    Date of Patent: September 11, 2018
    Inventor: Ronald Scott Bandy
  • Patent number: 10029533
    Abstract: A vehicle suspension control system is disclosed for use in load-carrying vehicles. The system controls a response of a suspension cylinder configured to support a main body of a vehicle in relation to a ground-contacting portion of the vehicle. A main accumulator is configured to contain a main compressible gas volume and is fluidly connected with the suspension cylinder. An auxiliary accumulator is configured to contain an auxiliary compressible gas volume. A valve is configured to selectively fluidly connect the auxiliary accumulator to the suspension cylinder. When the valve is open, compressing the suspension cylinder compresses both the main compressible gas volume and the auxiliary compressible gas volume. When the valve is closed, the auxiliary accumulator is fluidly isolated from the suspension cylinder. A processor is configured to automatically open or close the valve using a solenoid actuator based on one or more operating parameters of the vehicle.
    Type: Grant
    Filed: January 23, 2017
    Date of Patent: July 24, 2018
    Assignee: Caterpillar Underground Mining Pty Ltd
    Inventors: Jason Prakash Wigg, Andrew Ellis Diecker
  • Patent number: 9932084
    Abstract: A diaphragm unit detachably attached to a damper body, includes: a cylinder in which a liquid is sealed; a piston rod having a piston sliding inside the cylinder on one end side of the piston rod, in which other end side of the piston rod is extended to an outside of the cylinder; and a rod guide having a bottomed cylindrical shape wherein an insertion opening into which the piston rod is inserted is provided at a bottom portion of the rod guide, the rod guide being fixed to a side of an opening of the cylinder into which the piston is inserted to thereby make the piston rod be slidably inserted in a liquid tight manner, the diaphragm unit further comprising: an end member; an air seal; a rod side member; an annular bump rubber; and a tubular diaphragm, as defined herein.
    Type: Grant
    Filed: September 25, 2015
    Date of Patent: April 3, 2018
    Assignee: SHOWA CORPORATION
    Inventor: Shigeki Awasa
  • Patent number: 9873301
    Abstract: A hydraulic damper (3) includes a tube (4), a piston assembly (5) disposed slidably inside the tube (4), and an additional valve assembly (13). A compression chamber (9) is defined between the piston assembly (5) and the additional valve assembly (13). An additional compensation chamber (14) is defined between the additional valve assembly (13) and one side of a slideable partition (10). A gas chamber (11) is defined at the other side of the slidable partition (10). The damper includes an additional chamber assembly (15) to retain all the advantages of a twin-tube damper while providing the single construction offered by a mono-tube damper. One end of the additional chamber assembly (15) is attached to the slidable piston chamber (5) or to said piston rod (6) at the compression side thereof and the other end of said additional chamber assembly (15) is terminated with the additional valve assembly (13).
    Type: Grant
    Filed: July 31, 2013
    Date of Patent: January 23, 2018
    Assignee: BEIJINGWEST INDUSTRIES CO., LTD
    Inventors: Pawel Slusarczyk, Janusz Goldasz
  • Patent number: 9863450
    Abstract: A hydro-mechanical device for providing tactile feel curve shaping, including: a housing; a fluid displacing element; and, a preloaded flow regulating assembly operatively connected to the housing. The housing has a working fluid chamber formed therein, the working fluid chamber containing working fluid. The fluid displacing element is positioned within the working fluid chamber. The fluid displacing element divides the working fluid chamber into at least two cavities upon which fluid is transferred upon movement of the fluid displacing element. The flow of the working fluid is controlled through the preloaded flow regulating assembly in accordance with a custom force profile combining a controlled velocity dependent force component and a controlled resisting force component which opposes an applied force at a controlled maximum threshold.
    Type: Grant
    Filed: April 16, 2014
    Date of Patent: January 9, 2018
    Assignee: ROCKWELL COLLINS, INC.
    Inventors: Martin Koschel, Ryan D. Fleming, Andrew M. Wright, Paul D. March, Ryan P. Dermawan
  • Patent number: 9846015
    Abstract: A fluid lubricated projectile trap includes a substantially cylindrical chamber defined by a forward concave wall and a rearward concave wall. A bullet funnel extending forwardly therefrom. The funnel having a lower panel connecting to the forward concave wall in conjunction with an end plate defines a pressurized fluid containment with discharge outlets directed to the rearward concave wall. All plumbing may be secured below the ramp and forward of the chamber.
    Type: Grant
    Filed: August 23, 2016
    Date of Patent: December 19, 2017
    Assignee: Savage Range Systems, Inc.
    Inventors: Charles E. Nester, Ronald Coburn
  • Patent number: 9816538
    Abstract: A hydraulic cylinder enclosing a cavity, the cylinder containing a thru hole, an inner cylinder surface, and a longitudinal axis, and a piston within the cavity and movable relative to the cylinder in parallel to the longitudinal axis between a first and second positions. The piston includes a rod extending through the thru hole, the piston attached to the rod and in sealed engagement with the inner cylinder surface, and dividing the cavity into low and high pressure cavities, and each of the low and high pressure cavities containing a hydraulic fluid. The hydraulic cylinder further including a flexible bladder within the high pressure cavity containing a gas and preventing the gas from mixing with hydraulic fluid in the high pressure cavity.
    Type: Grant
    Filed: August 31, 2016
    Date of Patent: November 14, 2017
    Assignee: VETCO GRAY INC.
    Inventors: Robert James Wagner, Benjamin James Kubichek, Daniel Louis Havelka
  • Patent number: 9796232
    Abstract: A damper is provided having a twin tube construction interconnected to a gas reservoir. The connection of each of the inner and outer volumes of the twin tube to the gas reservoir is independently valved, and each of these valves are independently settable to change the differential pressure thereacross at which they open. The damper provides flow passages directly from the inner and outer volumes to enable flow form the compression to rebound sides thereof, as well as through the valved connections to the gas reservoir and at least one valved opening in the damper piston.
    Type: Grant
    Filed: April 13, 2015
    Date of Patent: October 24, 2017
    Assignee: Fox Factory, Inc.
    Inventor: Christopher Paul Cox
  • Patent number: 9784332
    Abstract: Disclosed herein is a novel gas permeable internal floating piston specifically designed for installation in the multiple stage air shock whereby the multiple stage air shock is covered in prior patent applications. The multiple stage air shock includes a mixture of oil and gas whereby the mixture provides the shock with emulsion dampening properties. The gas permeable internal floating piston operates by separating the oil from the gas thereby improving the dampening properties of the shock. The permeability of the internal floating piston is based on a membrane that allows the gas but not the oil to pass through the structure of the internal floating piston. The mechanism of the permeability is governed by the creation of a pressure differential across the structure of the internal floating piston, the creation effected with a spring. The membrane features a slow rate of permeation thereby ensuring that the internal floating piston moves in conjunction with the shaft during the operation of the shock.
    Type: Grant
    Filed: November 12, 2015
    Date of Patent: October 10, 2017
    Inventor: Ronald Scott Bandy
  • Patent number: 9701206
    Abstract: A regenerative braking control method of a hybrid vehicle may include determining whether to perform regenerative braking in a regenerative braking determining step, determining whether to stop an engine in an engine stopping determining step, and performing shifting to a lowest gear stage driven by a motor in a preceding shifting step if it is determined in the engine stopping determining step that the engine stops.
    Type: Grant
    Filed: April 17, 2015
    Date of Patent: July 11, 2017
    Assignee: Hyundai Motor Company
    Inventor: Kum Lim Choi
  • Patent number: 9695903
    Abstract: To provide a novel damper for a compressor that includes a vibration isolation system that suits the low rotation speed of a compressor of a cooling apparatus. A plurality of support projections that support annular mounting portions of a compressor at multiple points are provided at an upper end portion of a cylindrical support. The plurality of support projections elastically support the compressor so that the compressor has a high center of gravity and allow the compressor to be laterally displaced by vibration. Moreover, a bellows portion that is elastically deformed while being in contact with the annular mounting portion that becomes laterally displaced is provided. The elastic deformation of the bellows portion buffers the lateral displacement of the compressor and stirs a viscous fluid that fills inside thereof to buffer the vibration.
    Type: Grant
    Filed: August 29, 2012
    Date of Patent: July 4, 2017
    Assignees: Panasonic Corporation, Polymatech Japan Co., Ltd.
    Inventors: Tsuyoki Hirai, Akira Naito
  • Patent number: 9605463
    Abstract: A snubber apparatus comprises a casing defining an inner cavity. A shaft passes through the inner cavity and rotates about its longitudinal axis. The shaft has one or two ends laterally projecting out of the casing and being connected to a moving part of a tool to dampen given motions thereof. A wiper arm is on the shaft so as to rotate therewith the shaft, with a free end in close proximity to the surface portions of the inner cavity. The free end has an arcuate contour complementarily corresponding to a circumferential surface portion. A dam extends from the circumferential surface portion into close proximity to the wiper arm, to divide the inner cavity in two chambers, with movements of the wiper arm changing the volume of the chambers. A hydraulic circuit controls a flow of fluid between chambers to oppose a force to rotation of the shaft.
    Type: Grant
    Filed: May 18, 2012
    Date of Patent: March 28, 2017
    Assignee: GLOBAL CASTING INC.
    Inventor: Michel Pilon
  • Patent number: 9593737
    Abstract: A pneumatic spring strut assembly comprises a cylinder wall defining an interior volume having a working end and a boosting chamber adjacent to the working end, the working end including a first volume of gas and the boosting chamber including a second volume of gas, a piston assembly disposed for reciprocation in the working end of the interior volume, a piston rod having a proximal end secured to the piston and a distal end projecting out of the interior volume, a temperature control valve assembly disposed in the interior volume separating the working end from the boosting chamber and including an engineered portion that is configured to prevent fluid flow between the working end and the boosting chamber while the first volume of gas is present in the working end and to permit fluid flow between the working end and the boosting chamber should the working end be evacuated of the first volume of gas.
    Type: Grant
    Filed: January 12, 2015
    Date of Patent: March 14, 2017
    Assignee: GM GLOBAL TECHNOLOGY OPERATIONS LLC
    Inventors: Joel Colombo, Michael P. Balogh
  • Patent number: 9587444
    Abstract: A lubricator for use in a plunger lift system includes a tubular body having an outlet formed through a wall thereof and a bore therethrough. The bore is closed at an end thereof. The lubricator further includes a striker assembly disposed within the bore. The striker assembly includes a dampener housing longitudinally movable relative to the tubular body between a ready position and a stroked position and a choke plate. The choke plate: is disposed in the dampener housing, separates a bore of the housing into an upper hydraulic chamber and a lower hydraulic chamber, and has one or more orifices formed therethrough. The striker assembly further includes a dampener support rod connecting the choke plate to the tubular body. The orifices are sized to dissipate kinetic energy of a plunger striking a lower end of the dampener housing.
    Type: Grant
    Filed: December 20, 2013
    Date of Patent: March 7, 2017
    Assignee: Weatherford Technology Holdings, LLC
    Inventor: Manish Agarwal
  • Patent number: 9581216
    Abstract: A tensioning device for applying a tensioning force to a component has a cylinder housing having a hydraulic medium filled axial cylinder, a piston rod guided in the cylinder recess telescoping in a longitudinal axis direction, and displaceable back and forth, projecting out of the cylinder housing at one end, a piston guided in an axial piston rod recess, and displaceable, back and forth, by a limited amount, in the longitudinal axis direction, from a moved-in position to a moved-out position, and a spring element connected with the piston driving the piston in an outward piston movement direction parallel to the longitudinal axis. Force is applied to the piston by the spring element and by the hydraulic medium, so that inward movement of the piston rod into the cylinder housing (8), in the inward piston rod movement direction (77), brings about inward movement of the piston into the piston rod.
    Type: Grant
    Filed: January 26, 2015
    Date of Patent: February 28, 2017
    Assignee: Hemscheidt Fahrwerktechnik GmbH & Co. KG
    Inventors: Markus Parizek, Mark Woehrmann
  • Patent number: 9470285
    Abstract: A method and apparatus for dampening a structure in an aircraft. The apparatus comprises a housing, a first compartment located along an axis extending centrally through the housing, a second compartment located adjacent to the first compartment on the axis extending centrally through the housing, a first piston, a rod, and a second piston. The housing has an elongate shape. The first piston is located within the first compartment of the housing. The first piston defines a first chamber and a second chamber of the first compartment as the first piston moves within the housing. The rod is associated with the first piston and extends centrally through the first compartment and the second compartment. The second piston is coaxial to the first piston and located within the second compartment. The second piston moves relative to the rod to accommodate a flow of a fluid into the second compartment.
    Type: Grant
    Filed: April 8, 2014
    Date of Patent: October 18, 2016
    Assignee: THE BOEING COMPANY
    Inventor: Leo Walter Plude
  • Patent number: 9453550
    Abstract: A shock damper is disclosed. The shock damper may have a 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: February 13, 2015
    Date of Patent: September 27, 2016
    Assignee: Goodrich Corporation
    Inventors: Kenneth D. Smith, Enrico Manes
  • Patent number: 9447836
    Abstract: A spring system that includes a compressible material that is used to control the speed of the rod movement and/or the end travel cushioning.
    Type: Grant
    Filed: September 25, 2014
    Date of Patent: September 20, 2016
    Assignee: Barnes Group Inc.
    Inventor: Phillip McConnell
  • Patent number: 9423217
    Abstract: A fluid lubricated projectile trap includes a substantially cylindrical chamber defined by a forward concave wall and a rearward concave wall. A bullet funnel extending forwardly therefrom. The funnel having a lower panel connecting to the forward concave wall in conjunction with an end plate defines a pressurized fluid containment with discharge outlets directed to the rearward concave wall. All plumbing may be secured below the ramp and forward of the chamber.
    Type: Grant
    Filed: September 17, 2015
    Date of Patent: August 23, 2016
    Assignee: SAVAGE ARMS, INC.
    Inventors: Charles E. Nester, Ronald Coburn
  • Patent number: 9415653
    Abstract: In one embodiment, a gas spring having a travel control includes positive and negative chambers and a valve mechanism that controls the fluid communication between the chambers. The valve mechanism includes a valve bore that while only moving a small amount, allows for large changes in gas spring travel length.
    Type: Grant
    Filed: July 21, 2014
    Date of Patent: August 16, 2016
    Assignee: Fox Factory, Inc.
    Inventors: Joseph Franklin, Robert C. Fox
  • Patent number: 9377076
    Abstract: A magneto-rheological (MR) damping system for preventing stratification of MR fluid is disclosed. The MR damping system has a housing, a piston, and a stir band. The piston operably reciprocates within the housing and includes a circumferential portion. The circumferential portion has a groove. The stir band is disposed in the groove of the piston and includes an outer periphery and a plurality of flexible protrusions. The flexible protrusions have a head portion and a tail portion. The head portion is fixed to the outer periphery. The tail portion extends from the head portion and is disjointed from the outer periphery and is substantially flexible relative to the head portion. Therefore, the stir band diverts a flow of MR fluid in one of a clockwise or a counter-clockwise direction about the circumferential portion of the piston, during a reciprocatory movement of the piston.
    Type: Grant
    Filed: February 16, 2015
    Date of Patent: June 28, 2016
    Assignee: Caterpillar Inc.
    Inventor: Christopher M. Elliott
  • Patent number: 9334917
    Abstract: The present invention provides a damping device and a method for assembling the damping device. The damping device includes an outer tube and an inner tube disposed concentrically along a center axis defining a chamber, with a diaphragm located between the inner tube and outer tube dividing the chamber. A gas charge seal is secured over the chamber between the outer tube and inner tube. An inner clamp is in a sealing engagement with the inner tube and holds the diaphragm in place. A waist defines a sealing surface adjacent to outer tube. The diaphragm extends from under the inner clamp and through a “U” shaped turn back towards the waist. An upper clamp axially aligns with the waist and holds the diaphragm into the waist of the outer tube, sealing the diaphragm to the outer tube.
    Type: Grant
    Filed: July 4, 2012
    Date of Patent: May 10, 2016
    Assignee: Beijing West Industries Co., Ltd.
    Inventor: Saiman Lun
  • Patent number: 9168972
    Abstract: A control device, for the rear shock absorber of a bicycle, includes a first air chamber, a second air chamber, a third air chamber, an auxiliary air chamber, and a sliding rod. An air piston is arranged inside one of the first, second and third air chambers. However, those air chambers are respectively provided with an air hole communicating with the auxiliary air chamber. The sliding rod is configured with air tight rings, which are arranged top-to-bottom and tightly touch the inner wall of the auxiliary air chamber. Moreover, the sliding rod is provided with grooves between the air tight rings, so that the axially movement of the sliding rod may manage the first, second and third air chambers to be disconnected or to communicate with one other via the grooves to adjust the damping coefficient of the rear shock absorber.
    Type: Grant
    Filed: January 2, 2014
    Date of Patent: October 27, 2015
    Assignee: Taiwan Hodaka Industrial Co., Ltd.
    Inventor: Black Tsai
  • Patent number: 9091319
    Abstract: The present invention provides a hydraulic shock absorber. A solid main piston is designed to slide in a damping cylinder parallel to the movement generated when the shock absorber is subjected to a compression or a rebound stroke, the main piston dividing the damping cylinder into a first damping chamber containing the piston rod and a second damping chamber which does not contain the piston rod. A pressurization reservoir is pressurized by a force acting on a moving piston. The pressurization reservoir is arranged outside the damping cylinder and oriented at an angle relative to the damping cylinder. Two separate, adjustable valves generate a damping force acting in opposition to the stroke movement by restricting a damping medium flow between the damping chambers. A fourth defined chamber is hydraulically connected via separate flow paths to both the first and the second damping chamber and the pressurization reservoir.
    Type: Grant
    Filed: February 4, 2008
    Date of Patent: July 28, 2015
    Assignee: Ohlins Racing AB
    Inventors: Atsushi Ishii, Alexandra Jarlmark
  • Publication number: 20150129380
    Abstract: A hydraulic damper device includes a cylinder unit including a cylinder body having an inner surface and a plug, and a piston unit including a piston, a piston rod and a valve member. The piston defines an annular groove. The valve member is disposed movably in the annular groove. The piston cooperates with the inner surface to define a valve opening and a valve seat. The valve seat has a truncated conical surface. The valve member is movable between a closing position, in which the valve member covers sealingly the valve opening and abuts against the truncated conical surface, and an opening position, in which the valve member is spaced apart from the truncated conical surface.
    Type: Application
    Filed: November 14, 2013
    Publication date: May 14, 2015
    Inventor: Chung-Hsing WU
  • Publication number: 20150075929
    Abstract: The invention relates to a hydrodynamic retarder, comprising a bladed rotor and a bladed stator which jointly form a working chamber which can be filled with working medium and is discharged therefrom; a working medium container for receiving working medium that is currently not situated in the working chamber; a control pressure application system for pressurizing the working medium contained in the working medium container with a control pressure medium, so that more or less working medium is displaced from the working medium container to the working chamber in order to set a desired braking torque.
    Type: Application
    Filed: January 11, 2013
    Publication date: March 19, 2015
    Inventors: Dieter Laukemann, Alexander Martin
  • Patent number: 8973725
    Abstract: A shock strut includes a relief device that reduces the internal pressure within a sealed chamber of the shock strut when a load condition that exceeds a maximum operating load condition is encountered. The reduced pressure permits a telescopically moving piston of the shock strut to be received into a corresponding cylinder to an amount that increases the structural capability of the shock strut, especially with respect to applied side loads that generate bending and shearing stresses in the shock strut. In one embodiment, the reduced pressure permits the piston to “bottom out” relative to the cylinder, which is a condition not otherwise achievable without the relief device. This additional stroke achievable by the piston reduces or eliminates the need to reinforce and thus add weight to the shock strut because of higher load condition design requirements.
    Type: Grant
    Filed: July 21, 2009
    Date of Patent: March 10, 2015
    Assignee: Goodrich Corporation
    Inventors: Paul J. Lavigne, Paul Vanderpol
  • Publication number: 20150047933
    Abstract: A monotube shock absorber which is capable of high compression damping forces while operating at low pressure for reduced friction is disclosed. The monotube shock absorber includes a pressure tube, a piston assembly, a piston rod, a fixed valve assembly and a floating piston. A variety of methods for securing the fixed valve assembly to the pressure tube are disclosed including use of single piece pressure tubes and pressure tube assemblies. In addition, a method for assembling the monotube shock absorber including an oil filling technique is described.
    Type: Application
    Filed: August 14, 2014
    Publication date: February 19, 2015
    Inventors: Daniel KEIL, Thomas MALLIN, Zachary LOPEZ
  • Publication number: 20150047934
    Abstract: A monotube shock absorber which is capable of high compression damping forces while operating at low pressure for reduced friction is disclosed. The monotube shock absorber includes a pressure tube, a piston assembly, a piston rod and a fixed valve assembly. A fluid/gas chamber is defined by the fixed valve assembly. A baffle is disposed within the fluid/gas chamber to reduce the sloshing of oil within the fluid/gas chamber.
    Type: Application
    Filed: August 14, 2014
    Publication date: February 19, 2015
    Inventor: Thomas Mallin
  • Patent number: 8955653
    Abstract: A method and apparatus for a fluid damper comprising a first fluid-filled chamber, a second chamber filled with a fluid having variable flow characteristics and at least partially displaceable by the first fluid, and a gas chamber, the gas chamber compressible due to the displacement of the second chamber. In one embodiment, the fluid in the second chamber is a variable rheology fluid.
    Type: Grant
    Filed: October 12, 2010
    Date of Patent: February 17, 2015
    Assignee: Fox Factory, Incorporated
    Inventor: John Marking
  • Publication number: 20140353938
    Abstract: The damper assembly has a damper housing at least partially defining an interior chamber. A free piston is positioned in the damper housing to separate the interior chamber into a gas-filled chamber and a fluid-filled chamber. A piston assembly is configured to move within the fluid-filled chamber and separates the fluid-filled chamber into an extension chamber and a compression chamber. A valve assembly separates the compression chamber into a primary chamber adjacent the piston assembly and a secondary chamber adjacent the free piston. The valve assembly is configured to restrict flow from the primary chamber to the secondary chamber to cause a pressure drop during compression by the piston assembly. The free piston is configured to slide within the damper housing in response to fluid displacement caused by movement of the piston rod in the fluid-filled chamber.
    Type: Application
    Filed: May 30, 2013
    Publication date: December 4, 2014
    Inventor: Robert P. Marble
  • Patent number: 8881875
    Abstract: A colloidal damper disposed between two members for damping a relative movement of the two members, including: (I) a cylinder device including a housing and a piston which are connected to one and the other of the two members and which define a chamber; (II) a colloidal-solution sealed body accommodated in the chamber and including: (A) a colloidal solution in which are mixed a first working fluid and porous bodies each having pores; and (B) a hermetically sealed container which has flexibility and which hermetically seals the colloidal solution contained therein; and (III) a second working fluid contained in the chamber together with the colloidal-solution sealed body, wherein the colloidal damper is configured to damp the relative movement of the two members by the inflow and the outflow of the first working fluid into and out of the pores upon the relative movement of the two members.
    Type: Grant
    Filed: September 29, 2010
    Date of Patent: November 11, 2014
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventor: Shuuichi Buma
  • Publication number: 20140325970
    Abstract: An impact energy conversion device, designed particularly for a car bumper comprises cylinders and at least one confusor (4), where each confusor (4) is, at its inlet, connected to the main hydraulic cylinder (6) fitted inside with the bearing of the main piston rod (7), which receives the impulse of the impact, and at its outlet is, via a non-return valve (3), connected to a hydropneumatic cylinder (8, 10), its hydraulic section (8) separated from the pneumatic section (10) with a separator, which preferably serves as the piston rod (9) between the hydraulic section and the pneumatic section and cooperates with the agent flowing through the confusor (4). The confusor (4), the main hydraulic cylinder (6), and the hydropneumatic cylinder (8,10) are arranged coaxially, or at an angle, preferably the right angle.
    Type: Application
    Filed: July 1, 2011
    Publication date: November 6, 2014
    Inventor: Piotr Mitre Radowski
  • Publication number: 20140326554
    Abstract: A method and apparatus for a shock absorber having a damping fluid compensation chamber with a gas charge. In one aspect, a partition separates a first chamber portion from a second chamber portion, wherein the first portion of the chamber is at a first initial gas pressure and the second portion of the chamber is at a second initial pressure. A valve separates the first and second chamber portions and opening the valve comingles the first and second chamber portions so that the combined chamber portions are at a third pressure. In another aspect, a piston disposed through a wall is in pressure communication with the gas charge and is biased inwardly toward a pressure of the charge, whereby an indicator is movable by the piston in response to the pressure.
    Type: Application
    Filed: July 14, 2014
    Publication date: November 6, 2014
    Inventor: John Marking
  • Patent number: 8863918
    Abstract: In a hydraulic shock absorber, upper and lower pistons forming upper and lower two stages are fixed to a leading end portion of a piston rod. An intermediate oil chamber is provided between the upper and lower pistons. An intermediate air chamber is provided in such a manner as to compensate an oil amount change in an oil chamber by coming into contact with the intermediate oil chamber and expanding and compressing on the basis of the oil amount change of the oil chamber caused by an extension and compression stroke of the piston rod, and an air compression rate of an upper portion air chamber of the oil reservoir chamber is set to be equal to or more than an air compression rate of the intermediate air chamber, with respect to the extension and compression stroke of the piston rod.
    Type: Grant
    Filed: June 20, 2012
    Date of Patent: October 21, 2014
    Assignee: Showa Corporation
    Inventor: Yosuke Murakami
  • Publication number: 20140291085
    Abstract: This is a novel shock absorber based on an oil-gas emulsion air shock design with both shock damping and suspension spring properties. The design's underlying purpose is the capability to extend beyond twice its compressed length—a quality inherently unobtainable by current shock absorbers. This capability is derived from a design possessing multiple stages whereby each stage refers to a paired working tube and shaft, and operates independently of and in series with other stages—in effect a shock within a shock. This shock is specifically created to exploit the extreme travel capacity associated with the opposed triangulated 4-link suspension system; and, is suitable for use with other high-articulation suspension systems that can be installed on street-driven four wheel drive (4WD) vehicles.
    Type: Application
    Filed: March 30, 2013
    Publication date: October 2, 2014
    Inventor: Ronald Scott Bandy
  • Publication number: 20140291086
    Abstract: A hydraulic shock absorbing apparatus includes: an inner tube; and an outer tube that is placed outside the inner tube, in which a space is defined between an outer circumferential surface of the inner tube and an inner circumferential surface of the outer tube, and a protruding portion protruding from the outer circumferential surface of the inner tube toward the outer tube or a protruding portion protruding from the inner circumferential surface of the outer tube toward the inner tube is provided in the space, and the protruding portion is formed over an entire circumference of the outer circumferential surface of the inner tube or the inner circumferential surface of the outer tube, and has a waveform when viewed from a direction crossing the outer circumferential surface or the inner circumferential surface.
    Type: Application
    Filed: August 28, 2013
    Publication date: October 2, 2014
    Applicant: SHOWA CORPORATION
    Inventors: Tatsuro SUZUKI, Seiryo KONAKAI, Mototsugu YAMANAKA, Yuichi ENOMOTO, Takahiro MIURA, Kunio SHIBASAKI
  • Publication number: 20140238795
    Abstract: A damper unit includes first and second chambers, a first piston dividing the first chamber into first and second volumes, and a second piston dividing the second chamber into third and fourth volumes. Each piston is moveable along the respective chamber. The second chamber has a cross-sectional area that is smaller than the cross-sectional area of the first chamber so that the second chamber at least partially slides inside the first chamber and at least part of the first chamber can be located around the outside of the second chamber. The first piston is attached to the part of the second chamber that slides inside the first chamber. The position of the second piston is fixed relative to the first chamber as the second chamber slides relative to first chamber. The length of the damper unit changes as the second chamber slides relative to the first chamber.
    Type: Application
    Filed: August 26, 2013
    Publication date: August 28, 2014
    Applicant: McLaren Automotive Limited
    Inventor: Will HOULT
  • Patent number: 8813925
    Abstract: A hydropneumatic suspension unit for a vehicle that includes an outer sleeve which defines a first chamber, and a damping piston which is arranged for sliding displacement in the first chamber. The first chamber contains gas mainly for providing spring action and liquid mainly for providing damping action. The gas is in direct contact with the liquid.
    Type: Grant
    Filed: June 1, 2009
    Date of Patent: August 26, 2014
    Assignee: Stromsholmen AB
    Inventors: Jakob Axelsson, Leif Lundahl