Piston Valve Detail (e.g., Seat Design, Structural Arrangement, Metering Element) Patents (Class 188/322.15)
  • Patent number: 11181162
    Abstract: A shock absorber has a rod that is retractably inserted in an axial direction inside the cylinder, a piston that is provided at a tip of the rod and partitions the inside of the cylinder into an extension-side chamber and a compression-side chamber, a rod guide that is provided at an open end of the cylinder and axially supports the rod, a subcylinder that is provided on the rod guide and forms an annular gap between itself and the cylinder, and a subpiston that is provided on an outer periphery of the rod closer to a base end thereof than the piston, that has an outer periphery in sliding contact with an inner periphery of the cylinder, and that is capable of leaving and entering the annular gap.
    Type: Grant
    Filed: September 5, 2018
    Date of Patent: November 23, 2021
    Assignee: KYB MOTORCYCLE SUSPENSION CO., LTD.
    Inventor: Mikio Ito
  • Patent number: 11117635
    Abstract: A system for adjusting the damper force on the suspension system of a bicycle is provided. Sensors are placed on the front shock and rear shock to measure the amplitude of displacement or acceleration in the time domain and generate a zenith position, velocity, force, and work based on the measured values. The system calculates a curve fit approximation curve for the relationships of zenith position versus velocity and uses the approximation curves to generate and display recommended damper settings for the front shock and rear shock. Using the data ensures that the bicycle suspension data is balanced, such that the front shock and rear shock respond similarly to the same event.
    Type: Grant
    Filed: October 3, 2018
    Date of Patent: September 14, 2021
    Assignee: MOTION INSTRUMENTS INC.
    Inventors: Robert James Przykucki, Jr., Michael Chartier
  • Patent number: 11098782
    Abstract: A damping valve arrangement of a vibration damper for a motor vehicle includes a damping valve body having a longitudinal axis A and a throughflow passage is covered by at least one valve disk, a spring arrangement has at least a first substantially disk-shaped spring element; and a force transmission disk arranged between the valve disk and the first spring element so as to be axially displaceable coaxial to the damping valve body. The force transmission disk has a first surface facing the first spring element and comprising a first contact ring with a first diameter, which first contact ring is axially elevated above the first surface, and a second surface opposite the first surface, which second surface faces the valve disk and comprises a second contact ring with a second diameter, which second contact ring is axially elevated above the second surface.
    Type: Grant
    Filed: December 11, 2017
    Date of Patent: August 24, 2021
    Assignee: ZF FRIEDRICHSHAFEN AG
    Inventor: Andreas Förster
  • Patent number: 11066123
    Abstract: A compression damper of a shock absorber includes: a single adjustable fluid circuit configured for controlling a damping rate associated with multiple compression speeds of the shock absorber, wherein the single adjustable fluid circuit includes a fluid passageway through a base valve; and a positionally adjustable floating shim stack positioned at one end of the fluid passageway, the positionally adjustable floating shim stack configured for selectively blocking a flow of fluid through the fluid passageway.
    Type: Grant
    Filed: July 25, 2019
    Date of Patent: July 20, 2021
    Assignee: Fox Factory, Inc.
    Inventors: Damon Gilbert, Christopher Paul Cox
  • Patent number: 11008062
    Abstract: A front fork of a bicycle may include a suspension system that includes a damper. The damper may include a hollow tube with orifices that may be partially blocked by an adjustable blocker. A free end of the adjuster that adjusts the blocker may maintain its axial position in any rotational position. Ambient air may be introduced through a valve and retained in the suspension system. The suspension may include a mechanical spring in a chamber away from the valve that introduces the ambient air.
    Type: Grant
    Filed: August 3, 2018
    Date of Patent: May 18, 2021
    Assignee: Eko Sport, Inc.
    Inventor: Darek C. Barefoot
  • Patent number: 11002334
    Abstract: Generally described, dampers having shimmed pistons are configured for use with vehicle suspensions. The dampers generally include a shaft having a piston with compression and rebound valves extending therethrough. The piston interfaces a shim assembly at the valve outlets such that damping fluid flow is controlled through a set of valves in one direction, and the damping fluid flow is limited through the same set of valves in the opposite direction. In this regard, the shim assembly is configured to provide bleed relief of the hydraulic damping fluid at lower shaft speeds and deflect away from the piston higher shaft speeds. The shim assembly generally includes a ring shim that interfaces a shim stack to provide a configurable preload for the deflectable shims and a flow path for the hydraulic damping fluid during bleed relief.
    Type: Grant
    Filed: May 17, 2019
    Date of Patent: May 11, 2021
    Assignee: MF IP Holding, LLC
    Inventor: Christopher Paul Cox
  • Patent number: 11002333
    Abstract: The present invention relates to a vibration damper (1) comprising a damper tube (2) which is at least partially filled with damping fluid and in which a piston rod (3) is movable back and forth, wherein a working piston (4) is movable jointly with the piston rod (3), by means of which working piston the interior space of the damper tube is divided into a piston-rod-side working space (5) and a piston-rod-remote working space (6), a damping module (7) for the frequency-dependent control of a comfort bypass which is formed between the piston-rod-side working space (5) and the piston-rod-remote working space (6) and which comprises a comfort path via which damping fluid can be caused to flow hydraulically in parallel with respect to the flow through the working piston (4), a control piston (8) which is received, such that it can perform stroke movements, in the damping module (7) and which, remote from the piston rod, delimits a pressure chamber (9) arranged in the damping module (7), wherein the pressure ch
    Type: Grant
    Filed: May 16, 2017
    Date of Patent: May 11, 2021
    Assignees: thyssenkrupp Bilstein GmbH, thyssenkrupp AG
    Inventors: Juergen Schneider, Klaus Schmidt, Ole Goetz
  • Patent number: 10941830
    Abstract: In a shock absorber, an extension-side check valve permitting a flow of hydraulic fluid directed from a common passage to a compression-side passage side, and a compression-side orifice establishing communication between the compression-side passage and a compression-side back-pressure chamber are provided in an extension-side discharge passage. A compression-side check valve permitting a flow of hydraulic fluid directed from the common passage to an extension-side passage side, and an extension-side orifice establishing communication between the extension-side passage and an extension-side back-pressure chamber are provided in a compression-side discharge passage. A pilot valve includes a valve body slidably inserted in the common passage, and a valve spring biasing the valve body in a valve-opening direction.
    Type: Grant
    Filed: January 16, 2018
    Date of Patent: March 9, 2021
    Assignee: HITACHI AUTOMOTIVE SYSTEMS, LTD.
    Inventors: Kosuke Kadokura, Takao Nakadate, Shunsuke Mori, Osamu Yuno
  • Patent number: 10883560
    Abstract: A damper tube which is at least partially filled with damping fluid and in which a piston rod is movable back and forth, wherein a working piston is movable jointly with the piston rod, by means of which working piston the interior space of the damper tube is divided into a piston-rod-side working space and a piston-rod-remote working space. A damping module for the frequency-dependent control of a comfort bypass is formed between the piston-rod-side working space and the piston-rod-remote working space and which comprises a comfort path via which damping fluid can be caused to flow hydraulically in parallel with respect to the flow through the working piston.
    Type: Grant
    Filed: May 16, 2017
    Date of Patent: January 5, 2021
    Assignees: THYSSENKRUPP BILSTEIN GMBH, THYSSENKRUPP AG
    Inventors: Juergen Schneider, Klaus Schmidt, Ole Goetz
  • Patent number: 10865847
    Abstract: A damping valve includes a valve body has at least one through-flow channel for each flow direction of a damping medium through the valve body. Each through-flow channel connects an inlet to an outlet. a valve disk covers the through-flow channels at the outlet opening the valve disk has a first volume flow of the damping medium through the valve body, at least one pre-orifice in the valve disk and at least one pre-orifice throttle arrangement is arranged at least indirectly adjoining the valve disk and adapted to at least partially cover or open the pre-orifice depending on the flow direction of a damping medium. The pre-orifice throttle arrangement includes multiple structural component parts arranged coaxial to one another, at least two of the structural component parts are inseparably connected to one another.
    Type: Grant
    Filed: June 19, 2017
    Date of Patent: December 15, 2020
    Assignee: ZF Friedrichshafen AG
    Inventors: Harun Tucovic, Oswald Lichtlein, Eberhard Simon, Helmut Baalmann
  • Patent number: 10865849
    Abstract: Shock absorber comprising a tubular base, a piston, a stem connected to the piston, and a plurality of fluid paths for connecting a working chamber and an accumulation chamber on opposite sides of the piston, one of which provides for a ring-shaped obstructing member arranged about the piston and able to slide along an axial length of the piston. The obstructing member comprises a bush of plastic material, which has a flexible lip portion extending from a rear end of the bush and having a radially outer surface tapered towards the rear end of the bush, the lip portion being adapted to seal against a radially inner surface of the base when the obstructing member is in a closed configuration. A support ring member is adapted to radially engage the lip portion of the bush from within, and to push it against the radially inner surface of the base.
    Type: Grant
    Filed: May 1, 2018
    Date of Patent: December 15, 2020
    Assignee: Cultraro Automazione Engineering S.r.l.
    Inventor: Paolo Cultraro
  • Patent number: 10843521
    Abstract: An apparatus and method are described where one or more pre-stressed spring elements are disposed between two structures to mitigate or cancel the effect of static loads applied to a component connecting the structures. The apparatus and methods may be used, for example, to reduce the adverse impact of static loads on the performance of top-mounts in a suspension system of a vehicle.
    Type: Grant
    Filed: August 9, 2019
    Date of Patent: November 24, 2020
    Assignee: ClearMotion, Inc.
    Inventors: Ramkumar Krishnan, Marco Giovanardi
  • Patent number: 10830304
    Abstract: A frequency-selective damper valve includes a controlled flow channel providing a fluid connection between a first and second valve sides; a controlled valve assembly in a controlled flow channel; a movable valve body acting on the controlled valve assembly; and a variable volume chamber, the movable valve body interacting with the variable volume chamber such that movement of the movable valve body and a change in volume of the variable volume chamber are interrelated. The variable volume chamber includes an outlet opening, in operation, downstream of the controlled valve assembly and does not include an opening upstream of the controlled valve assembly with respect to a controlled fluid flow in the controlled flow channel, the outlet opening providing a flow resistance.
    Type: Grant
    Filed: November 28, 2016
    Date of Patent: November 10, 2020
    Assignee: Koni B.V
    Inventor: Paul De Kock
  • Patent number: 10690211
    Abstract: A shock absorber includes a cylinder and a piston dividing the cylinder in first and second cylinder chambers. The piston includes a first main channel and a first main non-return valve allowing a first main fluid flow from the second to the first chamber; and a second main channel and a second main non-return valve allowing a second main fluid flow from the first to the second chamber. The piston includes a connecting member; a first central member received into the connecting member such that the parts of the first main channel in the connecting member and the first central member are in line; and a second central member including another part of the second main channel and received into the connecting member such that the parts of the second main channel in the connecting member and the second central member are in line.
    Type: Grant
    Filed: November 28, 2016
    Date of Patent: June 23, 2020
    Assignee: KONI B.V.
    Inventor: Paul De Kock
  • Patent number: 10632805
    Abstract: A vehicle includes a support arm and a suspension element. The suspension element is rotatably connected to a support arm of a vehicle via a mounting pin that extends through an opening on the suspension element, a thrust washer, and a seal. The combination of elements prevent debris from migrating into the connection. The suspension element is configured to connect to a structural element of the vehicle via an upper mount. The suspension element may include a recoil damper having a piston with a plurality of grooves arranged to balance the forces on the piston during and after a recoil event or jounce.
    Type: Grant
    Filed: April 19, 2018
    Date of Patent: April 28, 2020
    Assignee: Oshkosh Defense, LLC
    Inventors: Aaron Rositch, Erik Ellifson, Patrick Dillman, Kai Schubart, Robert Sollenskog
  • Patent number: 10626946
    Abstract: A damper includes a piston and a cylinder housing the piston, and generates a braking force based on a movement or relative movement of the piston. The piston includes a trunk portion and a seal ring surrounding the trunk portion. A first seal portion against an inner wall of the cylinder is formed on an outer peripheral portion in the seal ring, and a second seal portion against a circumference wall portion projecting from the trunk portion is formed in a front end portion positioned on a pressure chamber side. Also, a support rib portion is provided outside the trunk portion, which allows the seal ring to move within a predetermined range along a moving direction of the piston in a state wherein a movement gap for a fluid is formed between the trunk portion and an inner peripheral portion of the seal ring.
    Type: Grant
    Filed: September 16, 2016
    Date of Patent: April 21, 2020
    Assignee: NIFCO INC.
    Inventor: Kei Shimozaki
  • Patent number: 10625994
    Abstract: A compressible stop for use in a crane has a housing, a rod slidably mounted within the housing, a floating piston, and a valve assembly. The floating piston divides the housing into a gas portion biasing the floating piston towards an end of the housing and a liquid portion containing a hydraulic fluid. The valve assembly divides the liquid portion into a support portion and a reserve portion. The valve assembly includes a check valve allowing a liquid to flow from the reserve portion into the support portion, a pressure sensitive valve inhibiting the liquid from flowing from the support portion into the reserve portion unless the pressure is above a threshold pressure, and a frangible divider configured to rupture when the liquid pressure exceeds a rupture pressure.
    Type: Grant
    Filed: June 26, 2019
    Date of Patent: April 21, 2020
    Assignee: Manitowoc Crane Companies, LLC
    Inventors: Stephen Anthony Vossen, Jonathan Michael Borlee, Joel David Zick, Timothy James Albinger
  • Patent number: 10619694
    Abstract: A shock absorber including: a first passage (101) allowing working fluid to flow out from one chamber (19) as a result of movement of a piston (18); a second passage (181) provided in parallel with the first passage; a damping force generating mechanism (41) provided in the first passage, and configured to generate a damping force; a tubular case member (140) including at least a part of the second passage formed therein; an annular disc (134) supported on an inner peripheral side or an outer peripheral side in the case member. An annular seal member (156) configured to seal a gap to the case member is provided on a non-supported side of the annular disc. The shock absorber further includes two chambers (171, 172) in the case member, which are defined and provided by the disc. The disc is configured to block flow to the second passage.
    Type: Grant
    Filed: September 14, 2016
    Date of Patent: April 14, 2020
    Assignee: HITACHI AUTOMOTIVE SYSTEMS, LTD.
    Inventor: Mikio Yamashita
  • Patent number: 10458335
    Abstract: A minimum pressure shut-off valve closes off fuel flow responsive fuel pressure being below a predefined pressure. A sleeve includes at least a first flow window and a second flow window. The second window includes a notch providing a flow area based on an axial position of a spool moveable within the sleeve.
    Type: Grant
    Filed: September 17, 2012
    Date of Patent: October 29, 2019
    Assignee: Hamilton Sundstrand Corporation
    Inventors: David J. Podgorski, Peter M. Ballard
  • Patent number: 10427488
    Abstract: An apparatus and method are described where one or more pre-stressed spring elements are disposed between two structures to mitigate or cancel the effect of static loads applied to an component connecting the structures. The apparatus and methods may be used, for example, to reduce the adverse impact of static loads on the performance of top-mounts in a suspension system of a vehicle.
    Type: Grant
    Filed: October 12, 2017
    Date of Patent: October 1, 2019
    Assignee: ClearMotion, Inc.
    Inventors: Ramkumar Krishnan, Marco Giovanardi
  • Patent number: 10344820
    Abstract: Generally described, aspects of the disclosed subject matter are directed to dampers having shimmed pistons. In accordance with aspects of the present disclosure, the dampers generally include a shaft having a piston with compression and rebound valves extending therethrough. The piston interfaces a shim assembly at the valve outlets such that damping fluid flow is controlled through a set of valves in one direction, and the damping fluid flow is limited through the same set of valves in the opposite direction. In this regard, the shim assembly is configured to deflect away from the piston as a result of damping fluid flow through the first valve. The shim assembly generally includes a ring shim that interfaces a shim stack to provide a configurable preload for the deflectable shims.
    Type: Grant
    Filed: October 28, 2016
    Date of Patent: July 9, 2019
    Assignee: MF IP Holding, LLC
    Inventor: Christopher Paul Cox
  • Patent number: 10330169
    Abstract: The present disclosure relates to a frequency sensitive type shock absorber configured to generate a soft damping force using one dividing disk to change the damping force on the basis of a traveling speed of a vehicle and a state of a road surface, improve ride comfort and steering stability, and decrease a manufacturing cost.
    Type: Grant
    Filed: January 25, 2018
    Date of Patent: June 25, 2019
    Assignee: MANDO CORPORATION
    Inventor: Nam Ho Kim
  • Patent number: 10316922
    Abstract: A shock absorber includes a bottomed cylindrical housing (131), a disk (134) provided movably relative to the housing and forming a housing inner chamber (171) between a bottom portion of the housing and the disk, and a facing member (139) provided on an opposite side of the disk from the bottom portion so as to face the disk. Inner periphery sides of the housing and the facing member are fastened with a piston rod (21)inserted therethrough. A protruding portion is formed on the bottom portion of the housing or the facing member. The protruding portion protrudes toward the disk and is configured to restrict movement of the disk. A seal portion (158) is provided on one side of the disk where the protruding portion is provided. The seal portion is configured to seal between an outer periphery of the disk and an inner periphery of the housing.
    Type: Grant
    Filed: September 14, 2016
    Date of Patent: June 11, 2019
    Assignee: HITACHI AUTOMOTIVE SYSTEMS, LTD.
    Inventor: Mikio Yamashita
  • Patent number: 10179607
    Abstract: A lane keeping system for a vehicle includes a first roll angle sensor configured to provide a first signal indicative of dynamic vehicle body roll. A second roll angle sensor is configured to provide a second signal indicative of an angle between vehicle sprung and unsprung masses. A lane keeping system (LKS) controller is in communication with the first and second roll angle sensors. The LKS controller is configured to discern a vehicle roll angle in response to the first and second signals based upon effects of a lateral wind force on the vehicle. The LKS controller is configured to produce a correction in response to the determined lateral wind force effects to maintain the vehicle along a desired path.
    Type: Grant
    Filed: August 3, 2016
    Date of Patent: January 15, 2019
    Assignee: APTIV TECHNOLOGIES LIMITED
    Inventors: Kevin J. Hawes, Michael I. Chia, Ehsan Samiei, Walter K. Kosiak
  • Patent number: 10138975
    Abstract: One embodiment provides a pressure buffer device including: a cylinder that stores fluid; a flow path forming portion that forms a flow path; and an opening-closing portion that opens and closes the flow path of the flow path forming portion. The fluid flows through the flow path forming portion in accordance with relative movement of a rod with respect to the cylinder in an axial direction of the cylinder. The flow path forming portion includes an annular first protruded portion and an annular second protruded portion protruded in the axial direction in opposite sides respectively. The second protruded portion has an axial end located at a radially outer side of the first protruded portion, and a tilt portion formed at least at a part of a radially-inner part of the second protruded portion.
    Type: Grant
    Filed: January 13, 2017
    Date of Patent: November 27, 2018
    Assignee: SHOWA CORPORATION
    Inventor: Naoki Senou
  • Patent number: 10088051
    Abstract: A sealing arrangement includes a first and a second machine part movable relative to each other along a motional axis. A sealing element is arranged in a press fit in a plurality of grooves of a seal-holding structure of the first machine part. A sealing lip of the sealing element extends away from the seal-holding structure in the axial direction. A pretensioning element is disposed in a retaining groove of the first machine part. The sealing lip is pretensioned against a sealing surface of the second machine part in order to seal off a high-pressure region. The retaining groove has a wedge guide surface for the pretensioning element, which wedge guide surface is arranged running obliquely at an angle ?, where ?<90°, to the motional axis. The pretensioning element is movable against and along the wedge guide surface to pretension the sealing lip against the sealing surface.
    Type: Grant
    Filed: February 23, 2017
    Date of Patent: October 2, 2018
    Assignee: TRELLEBORG SEALING SOLUTIONS GERMANY GMBH
    Inventors: Holger Jordan, Eric Seeling
  • Patent number: 9915315
    Abstract: A valve component includes a first disk-shaped joining part and a second disk-shaped joining part. The first disk-shaped joining part has a first opening and has an elevation in a first region of the first disk-shaped joining part which runs at least partially peripherally around the first opening. The second disk-shaped joining part is joined to the first disk-shaped joining part and has a second opening which together with the first opening defines a channel for flow of a fluid medium therethrough. The second disk-shaped joining part further has a depression in a second region of the second disk-shaped joining part which runs at least partially peripherally around the second opening and which opposes the first region of the first disk-shaped joining part. The elevation interacts with the depression in sealing fashion.
    Type: Grant
    Filed: May 4, 2016
    Date of Patent: March 13, 2018
    Assignee: GKN Sinter Metals Holdings GmbH
    Inventors: Sascha Frey, Rainer Gruber
  • Patent number: 9353860
    Abstract: The invention relates to a valve component, in particular for a piston or a valve, comprising at least one first disk-shaped joining part and at least one second disk-shaped joining part, wherein the first and second joining part each have at least one opening, and wherein once the joining parts have been joined, the opening in the joining parts interacts in such a way that a channel is formed and a fluid medium can flow through the channel. In first and second regions at the joining parts, an at least partially peripheral elevation and/or depression interact with one another in sealing fashion once joined.
    Type: Grant
    Filed: May 6, 2013
    Date of Patent: May 31, 2016
    Assignee: GKN Sinter Metals Holding GmbH
    Inventors: Sascha Frey, Rainer Gruber
  • Patent number: 9334919
    Abstract: A hydraulic damper (1) includes an orifice plate (33) provided with an axial projection (334) and a number of rebound flow passages (332) disposed around the projection (334). A deflectable disc (91) and an elliptical disc (92) is disposed slidably one on top of the other over the axial projection (334) to cover a compression side of the rebound flow passages (332). A cage member (34) is fixed to a piston assembly at the compression side thereof and is provided with at least one passage (341, 343). A compression spring (95) is preloaded between the cage member (34) and the discs (91, 92) to normally close the compression side of the rebound flow passages (332).
    Type: Grant
    Filed: March 27, 2012
    Date of Patent: May 10, 2016
    Assignee: Beijing West Industries Co. Ltd.
    Inventors: Piotr Andrzej Flacht, Radoslaw Pawel Grzesik
  • Patent number: 9327797
    Abstract: A guide member for a vehicle shock absorber having a construction with which, even when the guide member contacts an inside tube member, the operation of the vehicle shock absorber is not obstructed. A vehicle shock absorber system is provided with an outer tube, an inner tube, a damper cylinder which is connected to the outer tube and is positioned on the inside of the inner tube, a spring guide which is fixed onto the outer circumferential surface of the damper cylinder, and a coil spring which is positioned between the inner tube and the spring guide. The spring guide is provided with a guide main body portion and a low friction portion provided in a portion of the guide main body portion which contacts the inner tube when the outer tube and/or the inner tube has been bent. The low friction portion has a lower coefficient of friction than the guide main body portion.
    Type: Grant
    Filed: October 4, 2012
    Date of Patent: May 3, 2016
    Assignee: YAMAHA HATSUDOKI KABUSHIKI KAISHA
    Inventor: Takamasa Kamioka
  • Patent number: 9200693
    Abstract: In a piston valve assembly for a shock absorber, a main piston partitions a cylinder into an upper chamber and a lower chamber. Compression passages and rebound passages penetrate the main piston in a vertical direction. A first compression value forms a first compression chamber, and a top surface of a lower retainer is opened toward the upper chamber. Bypass passages are formed on an outer peripheral surface of the piston rod. A guide assembly surrounds an outer peripheral surface of the compression valve and the bottom surface of the compression valve, tightly contacts the bottom surface of the compression valve in a high-frequency section, and moves down toward the lower retainer in a low-frequency section.
    Type: Grant
    Filed: June 16, 2014
    Date of Patent: December 1, 2015
    Assignee: MANDO CORPORATION
    Inventor: Jun Hyuk Lim
  • Patent number: 9121524
    Abstract: Provided is a shock absorber that includes a disk support section protruding between an intermediate seat and an inner seat, having a tip height position in a protruding direction higher than that of the inner seat and lower than that of the intermediate seat, and continuously or discontinuously disposed in an annular shape. In a state in which a first disk is pressed against the inner seat and placed on an outer seat, the intermediate seat and the disk support section, in the first disk, a first bending section bent in a convex shape toward a valve main body side is formed between the inner seat and the disk support section, and a second bending section bent in a convex shape toward a side spaced apart from the valve main body is formed between the disk support section and the outer seat.
    Type: Grant
    Filed: November 27, 2013
    Date of Patent: September 1, 2015
    Assignee: HITACHI AUTOMOTIVE SYSTEMS, LTD.
    Inventor: Masahiro Ashiba
  • Patent number: 9067471
    Abstract: A shock absorber includes a piston which has at least one compression fluid passage, at least one rebound fluid passage and at least one bleed fluid passage. A compression valve assembly closes the at least one compression passage and a rebound valve assembly closes the at least one rebound passage. A bleed valve assembly with the bleed fluid passage defines a first, always open flow path through the piston and a second flow path, separate from the first flow path, through the piston. A bleed disc is movable between a first position where the second flow path is open and a second position where the second flow path is closed.
    Type: Grant
    Filed: February 27, 2014
    Date of Patent: June 30, 2015
    Assignee: Tenneco Automotive Operating Company Inc.
    Inventors: Jean-Marie Tuts, Patrick Massonet, Ronny Vanbrabant, Kristoff Six
  • Patent number: 9033123
    Abstract: A valve structure includes a valve disc partitioning an interior of a damper into a one-side chamber and an other-side chamber, a plurality of one-side ports and a plurality of other-side ports communicating between the one-side chamber and the other-side chamber, a one-side leaf valve opening and closing only the one-side ports, and an other-side leaf valve opening and closing only the other-side ports, the one-side ports and the other-side ports are alternately arranged in the valve disc along the circumferential direction, and a plurality of through holes formed in the valve disk is opened from the inner circumferential side of openings of all the other-side ports and communicates with the one-side ports.
    Type: Grant
    Filed: May 22, 2012
    Date of Patent: May 19, 2015
    Assignee: KAYABA INDUSTRY CO., LTD.
    Inventors: Yukimasa Kobayashi, Hideaki Takeuchi, Yoshihiro Shibata
  • Publication number: 20150114774
    Abstract: A piston valve assembly for a shock absorber is disclosed. In a high-frequency mode, a damping force control is achieved through an open passage that is always opened. In a low-frequency mode, a guide assembly moves downward due to an increase in a pressure of a first pressure chamber by a fluid moved through an inlet hole of the first pressure chamber. At this time, the guide assembly blocks the open passage and the damping force control is achieved through only a rebound passage. Consequently, it is possible to solve a fluid bottle neck through a passage formation. A disk is installed on the inlet hole to prevent a continuous increase in the pressure of the first pressure chamber, thereby effectively preventing the reduction of the damping force.
    Type: Application
    Filed: June 18, 2014
    Publication date: April 30, 2015
    Inventor: Tae Ju KIM
  • Patent number: 9016447
    Abstract: A piston (10) comprises a first pair of passive flow-control valves (18, 20) [namely, a first compensation valve (18) and a first rebound valve (20)], a second pair of passive flow-control valves (22, 24) [namely, a second compensation valve (22) and a second rebound valve (24)], and a flow-dividing solenoid valve (14) shiftable between a first operating position [in which it allows flow of a damping fluid between an upper chamber and a lower chamber of a shock absorber through the first pair of passive flow-control valves (18, 20) and second pair of passive flow-control valves (22, 24)] and a second operating position [in which it allows the flow of the damping fluid between the upper chamber and lower chamber through only the second pair of passive flow-control valves (22, 24)]. The solenoid valve (14) is normally open (i.e., it is normally kept in the first operating position).
    Type: Grant
    Filed: August 4, 2011
    Date of Patent: April 28, 2015
    Assignee: Sistemi Sospensioni S.p.A.
    Inventors: Gianfranco De Lillo, Massimo Trinchera, Walter Bruno
  • Patent number: 9010505
    Abstract: A shock absorber is provided. The shock absorber includes: a piston rod; an inner passage having an inlet port at an outer periphery of the piston rod; and a stopper installed at the outer periphery of the piston rod. The stopper is disposed to surround the inlet port of the inner passage, and an outer passage extending from an upper portion of the stopper to the inlet port is formed between the stopper and the piston rod.
    Type: Grant
    Filed: October 3, 2012
    Date of Patent: April 21, 2015
    Assignee: Mando Corporation
    Inventor: Wan Sang Park
  • Patent number: 8997953
    Abstract: A shock absorber includes a piston assembly disposed within a pressure tube. The piston assembly has a first and a second housing and a valve assembly located adjacent the first housing. The valve assembly has a valve disc which engages the first housing to close at least one of a first plurality of passages extending through the first and second housings and a biasing member for applying a load to the valve disc.
    Type: Grant
    Filed: August 30, 2007
    Date of Patent: April 7, 2015
    Assignee: Tenneco Automotive Operating Company Inc.
    Inventor: Stefan Deferme
  • Patent number: 8997952
    Abstract: A motor-vehicle shock absorber has a tube at least partially filled with damping liquid and extending, a piston rod axially shiftable inside the damper tube, and a piston connected to the piston rod and subdividing the damper tube into a piston rod-side working chamber and an opposite working chamber. An on-off control valve is axially movable inside the piston between a closed and an open position. A first soft-characteristic damping valve inside the piston through which the damping liquid may flow in both flow directions is connectable to a flow path of the damping liquid from one into the other working chamber through the control valve. A second hard-characteristic damping valve through which the damping liquid may flow in both flow directions is also provided in the piston.
    Type: Grant
    Filed: August 23, 2010
    Date of Patent: April 7, 2015
    Assignee: ThyssenKrupp Bilstein GmbH
    Inventors: Ole Göetz, Wolfgang Hamers, Klaus Schmidt, Dmitrij Smeljanskij, Freddy Woenarta
  • Patent number: 8991841
    Abstract: An air spring that can be used in an air suspension system includes a hollow piston, a hollow shaft and a body. The hollow piston has a hole through it. The hollow shaft has a shaft interior volume in communication with the hole in the piston. The body has a body interior volume in communication with the hole in the hollow piston. The hole in the hollow piston in communication with the shaft interior volume and the body interior volume provides a total interior volume. Wherein, the total interior volume is greater than the body interior volume thereby providing a linearized spring rate.
    Type: Grant
    Filed: September 3, 2013
    Date of Patent: March 31, 2015
    Assignee: MSI Defense Solutions, LLC
    Inventors: David J. Holden, Andrew M. Wizorek, Todd J. Holbert
  • Patent number: 8955654
    Abstract: A vehicle shock absorber generates an additional counter-force acting counter to the direction of movement near the limit position of movement. The shock absorber substantially comprises a damping medium-filled damping cylinder that is divided into two damping chambers by a main piston. The main piston is axially moveable relative to the damping cylinder and is attached to a piston rod. A second piston/damping piston that contains one or more first and second through-ducts is mounted to the piston rod. The ducts are defined by first and second flow-limiting devices such as multiple thin washers. The damping piston slides in a restricting space located in the damping cylinder. The restricting space has an inside diameter smaller than the inside diameter of the damping cylinder. The additional counter-force is substantially constant throughout the entire stroke in order to create gentle braking of the damping movement.
    Type: Grant
    Filed: December 10, 2008
    Date of Patent: February 17, 2015
    Assignee: Ohlins Racing AB
    Inventors: Nils Göran Nygren, Magnus Danek, Johan Jarl
  • Publication number: 20150041269
    Abstract: In a piston valve assembly for a shock absorber, a main piston partitions a cylinder into an upper chamber and a lower chamber. Compression passages and rebound passages penetrate the main piston in a vertical direction. A first compression value forms a first compression chamber, and a top surface of a lower retainer is opened toward the upper chamber. Bypass passages are formed on an outer peripheral surface of the piston rod. A guide assembly surrounds an outer peripheral surface of the compression valve and the bottom surface of the compression valve, tightly contacts the bottom surface of the compression valve in a high-frequency section, and moves down toward the lower retainer in a low-frequency section.
    Type: Application
    Filed: June 16, 2014
    Publication date: February 12, 2015
    Applicant: MANDO CORPORATION
    Inventor: Jun Hyuk LIM
  • Patent number: 8950559
    Abstract: Shock absorber comprising a piston inside which a sleeve is present which can be operated separately from the piston. This sleeve is provided with through-flow conduits which can cooperate with apertures, which are fitted at a vertical distance, of a part of the piston in order to provide an auxiliary flow when the piston is displaced in the cylinder. Such auxiliary flow enters into a chamber which is delimited by one or more spring plates which act on a sleeve which loads the main valve against opening when it is pressed down by the spring plate. By filling the chamber with fluid, the load applied on the sleeve by the spring plate is reduced and the load on the main valve decreases, as a result of which the latter opens more readily.
    Type: Grant
    Filed: September 27, 2010
    Date of Patent: February 10, 2015
    Assignee: Koni B.V.
    Inventor: Paul de Kock
  • Publication number: 20150034437
    Abstract: A damping valve includes a valve disk, a retainer, an inner peripheral side flow passage configured to include a valve disk through hole formed in an inner peripheral side of the valve disk and a retainer through hole formed in the retainer and allowing communication between one and other chambers, an outer peripheral side flow passage formed in an outer peripheral side of the valve disk and allowing communication between the one and the other chambers, and a leaf valve in the form of an annular plate arranged on a side of the retainer opposite to the valve disk and configured to openably close the inner peripheral side flow passage by an outer peripheral part. A flow passage area of the retainer through hole is not smaller than that of the valve disk through hole.
    Type: Application
    Filed: February 18, 2013
    Publication date: February 5, 2015
    Applicant: KAYABA INDUSTRY CO., LTD.
    Inventor: Hideki Yamada
  • Publication number: 20150008083
    Abstract: A damping valve includes a piston with a one-side disk and an other-side disk, a port configured to include through holes, a piston rod, and a nut. A plurality of the through holes of the other-side disk are formed along between the inner peripheral seat surface and the outer peripheral seat surface. Elastic deforming portions are formed between the through holes of the other-side disk. A clearance is formed between the inner peripheral seat surface of the one-side disk and that of the other-side disk in a state where the nut is not tightened and the outer peripheral seat surface of the one-side disk and that of the other-side disk are in contact. The elastic deforming portions of the other-side disk are strained and the respective inner peripheral seat surfaces come into contact in a state where the nut is tightened.
    Type: Application
    Filed: February 18, 2013
    Publication date: January 8, 2015
    Applicant: KAYABA INUSTRY CO., LTD
    Inventor: Hideki Yamada
  • Patent number: 8925695
    Abstract: A progressive damping device for furniture is designed to prevent impacts between the mobile parts of furniture provided with self-closing systems, and provides progressive closure according to the speed and energy acquired in the closure. The damping device generally includes a cylinder in which a dynamic fluid circulates, and in the interior of which there is displaced a piston which has a rod provided with an elastoplastic valve, which delimits respective compression and expansion chambers.
    Type: Grant
    Filed: March 21, 2011
    Date of Patent: January 6, 2015
    Inventor: Miguel Angel Rioja Calvo
  • Patent number: 8919505
    Abstract: The invention relates to a hydraulic damper (1), in particular for the suspension system of a motor vehicle comprising a tube (2) filled with working liquid, inside of which a slidable piston assembly (3) is placed.
    Type: Grant
    Filed: September 15, 2010
    Date of Patent: December 30, 2014
    Assignee: BWI Company Limited S.A.
    Inventors: Pawel Slusarczyk, Waldemar Widla, Sebastian Kaffanke
  • Patent number: 8893864
    Abstract: A frequency unit valve is provided. In the frequency valve, a free piston reciprocates within a housing where a sub-valve is mounted in a lower portion. Variable frequency units installed above and under the free piston provide a damping characteristic by selectively opening or closing a passage when a frequency of a piston rod is in a high-frequency region and a low-frequency region. Accordingly, the vehicle ride comfort is maximally improved.
    Type: Grant
    Filed: October 4, 2012
    Date of Patent: November 25, 2014
    Assignee: Mando Corporation
    Inventor: Wan Sang Park
  • Patent number: 8857579
    Abstract: A shock absorber comprises a tubular housing (10), a cover (14), and a piston (34) defining within the tubular housing (10) a working chamber (W) 34g 34h and an accumulator chamber (A). A first fluid pathway (34p, 42, 34g) and a second fluid pathway (46, T, 34f) arranged in parallel connect the working chamber (W) to the accumulator chamber (A). The first fluid pathway establishes a permanent fluid communication between the working chamber (W) and the accumulator chamber (A). A valve assembly comprises an obturating element (44) arranged around the piston (34) and slidable along an axial length of the piston (34). The second fluid pathway comprises a first pathway section (34f) formed through the piston and a second pathway section (46, T) formed between the piston (34) and the obturating element (44). The second fluid pathway is able to selectively assume an open configuration and a closed configuration, and it has a lower fluid resistance than the fluid resistance of the first fluid pathway.
    Type: Grant
    Filed: October 13, 2010
    Date of Patent: October 14, 2014
    Assignee: Cultraro Automazione Engineering S.R.L.
    Inventor: Antonino Cultraro
  • Patent number: 8857581
    Abstract: A rotor hub and method to dampen a force exerted on a rotor hub by a rotor blade during flight. The rotor hub including a central member rotatably coupled to a rotor mast, a blade grip rigidly attached to a blade and movably coupled to the central member, and an adjustable damper operably associated with the blade grip. The method includes damping the force exerted on the rotor hub with the adjustable damper and selectively adjusting the adjustable damper between a first spring rate and a second spring rate.
    Type: Grant
    Filed: May 1, 2012
    Date of Patent: October 14, 2014
    Assignee: Textron Innovations Inc.
    Inventors: Frank B. Stamps, Michael R. Smith, Christopher M. Bothwell, Lawrence M. Corso, James L. Braswell, Jr., David A. Popelka, Ernst C. Schellhase, Charles L. Hollimon, Thomas J. Newman, Bryan Baskin, Thomas C. Campbell, Daniel B. Robertson