Valve Structure Or Location Patents (Class 188/322.13)
  • Patent number: 10907699
    Abstract: A frequency dependent piston assembly (1) for a shock absorber comprising: a piston (10) slidably disposed within a portion of cylinder (20), dividing volume defined within said portion of cylinder (20) into a first chamber (21) and a second chamber (22), said piston (10) comprising a flow channel (11) connecting said first chamber (21) and said second chamber (22); characterized in that said piston assembly (1) further comprises: a valve assembly (100) controlling fluid flow (150) between said first chamber (21) and said second chamber (22), configured for its preload to be changed by movement of said piston (10); a pressure chamber (300) comprising a chamber wall (301), configured to be moved by said piston (10) to change volume of said pressure chamber (300).
    Type: Grant
    Filed: January 3, 2017
    Date of Patent: February 2, 2021
    Assignee: Plush Ride GmbH
    Inventor: Shi Yan
  • Patent number: 10760666
    Abstract: The present embodiments relates to a reducer of an electric power steering device. An embodiment of the present embodiments provides a reducer of an electric power steering device, including: a worm shaft having a first worm shaft bearing and a second worm shaft bearing coupled to one end portion, which is connected to a motor shaft, and to the other end portion, which is opposite thereto, respectively; a gear housing that contains the first worm shaft bearing, the second worm shaft bearing, and the worm shaft; and a support member coupled to the inner peripheral surface of the hear housing so as to support the outer race of the second worm shaft toward the worm wheel and filled with a viscoelastic fluid.
    Type: Grant
    Filed: September 27, 2017
    Date of Patent: September 1, 2020
    Assignee: MANDO CORPORATION
    Inventor: Kyung Tack Lee
  • Patent number: 10533625
    Abstract: A damping force adjustable shock absorber that smoothly transfers a magnetic flux while a solenoid is downsized. An electromagnetic damping force adjustment device of the damping force adjustable shock absorber includes a damping force adjustment valve for generating a damping force, and a solenoid for variably adjusting the generated damping force. The solenoid includes a coil configured to generate a magnetic force through supply of current, a cap member having a bottomed tubular shape disposed on an inner peripheral side of the coil, a movable iron core disposed on an inner peripheral side of the cap member, an anchor member configured to attract the movable iron core, a shaft part provided on an inner peripheral side of the movable iron core, and a back-pressure-chamber formation member having a bottomed tubular shape, which is positioned on another end side of the shaft part, and configured to form a back pressure chamber.
    Type: Grant
    Filed: September 27, 2016
    Date of Patent: January 14, 2020
    Assignee: HITACHI AUTOMOTIVE SYSTEMS, LTD.
    Inventor: Shunsuke Mori
  • Patent number: 10330170
    Abstract: A rod guide includes a housing portion and a depressed portion formed toward an outer periphery from a starting point located apart from a piston rod by ½ or more of a distance in an axial direction between a bottom surface of the housing portion and a flat portion of an oil seal in a radial direction closest to the piston rod, and a bush is disposed to be flush with the bottom surface or disposed to project.
    Type: Grant
    Filed: November 30, 2015
    Date of Patent: June 25, 2019
    Assignees: KYB CORPORATION, TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Hirohito Kato, Seiichiro Komatsu, Yuusuke Furuta, Hirofumi Morinaga
  • Patent number: 9550403
    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: April 25, 2014
    Date of Patent: January 24, 2017
    Assignee: Stromsholmen AB
    Inventors: Jakob Axellson, Leif Lundahl
  • Patent number: 9541152
    Abstract: A suspension apparatus includes: a partition wall member that divides a space inside an inner tube into an upper space and a lower space; a cap that covers an upper opening portion of an outer tube; and a support member of which one end portion is retained by the cap, and of which the other end portion supports the other end portion of a piston rod, in which a through-hole is formed in a portion of the inner tube, an inner space of the piton rod is a space inside the piston rod and communicates with the lower space, the support member is a cylindrical member and forms an upper portion space, and the upper portion space communicates with the inner space of the piston rod, and at least one of the cap and the support member is provided with a communication path.
    Type: Grant
    Filed: April 22, 2014
    Date of Patent: January 10, 2017
    Assignee: SHOWA CORPORATION
    Inventor: Kojiro Yoshida
  • Patent number: 9387924
    Abstract: A method of servicing a shock strut of a landing gear includes partially filling the shock strut with fresh oil and pressurizing the chamber with gas. The pressurizing is to a pressure level that compensates for expected gas pressure loss due to gas entrainment in the oil during operation of the shock strut. The method can be performed without weight on wheels, with weight on wheels and a constant strut stroke, or weight on wheels and a constant pressure.
    Type: Grant
    Filed: June 27, 2014
    Date of Patent: July 12, 2016
    Assignee: Goodrich Corporation
    Inventors: Amir M. Fazeli, Adnan Cepic, Susanne M. Reber
  • Patent number: 9360078
    Abstract: In a friction member (22), a base section (92) is constituted by a bottom section (101) and a tube section (102). The bottom section (101) has a bored disk shape, and the tube section (102) has a cylindrical shape extending from an outer circumferential side of the bottom section (101) in the axial direction. An elastic rubber section (91) has a minimum inner diameter section (137), diameter expanding sections (138), (139) which are disposed at each side in the axial direction of the minimum inner diameter section (137). A tube section adhering surface (126) is installed at outer circumferential side of a tube section (102). A cutout section (151) is at least partially formed at a bottom section adhering surface (128) fixed to the bottom section (101) and the tube section (102) side of an open surface at an opposite side in the axial direction, and a deepest section (155) of the cutout section (151) is shallower than a position in the axial direction of the minimum inner diameter section (137).
    Type: Grant
    Filed: July 25, 2013
    Date of Patent: June 7, 2016
    Assignee: HITACHI AUTOMOTIVE SYSTEMS, LTD.
    Inventors: Mikio Yamashita, Toru Hosokawa
  • Patent number: 9347511
    Abstract: Provided is a continuous damping control shock absorber of a dual solenoid valve structure. The continuous damping control shock absorber of the dual solenoid valve structure includes a rebound solenoid valve and a compression solenoid valve. In the continuous damping control shock absorber, a separator tube for interworking prevention is installed to form a connection chamber at a position where the rebound separator tube and the compression separator tube are connected, thereby preventing interworking of the rebound solenoid valve and the compression solenoid valve 40. A communication hole is formed in the compression separator tube to communicate with the connection chamber.
    Type: Grant
    Filed: June 15, 2014
    Date of Patent: May 24, 2016
    Assignee: MANDO CORPORATION
    Inventor: Eun Joong Kim
  • Patent number: 9206876
    Abstract: For the extension and compression strokes of a piston rod, a damping force generating mechanism generates a damping force by controlling the flow of hydraulic oil caused by the sliding movement of a piston in a cylinder. The damping force generating mechanism has a pilot-type main valve, a pilot-type control valve, and a pilot valve. The main valve has a pilot chamber into which the oil is introduced to adjust the valve-opening pressure of the main valve by the pressure in the pilot chamber. The control valve has a pilot chamber into which the oil is introduced to adjust the valve-opening pressure of the control valve by the pressure in the pilot chamber. The pilot valve controls the pressure in the pilot chamber of the control valve. The control valve controls the pressure in the pilot chamber of the main valve.
    Type: Grant
    Filed: March 25, 2014
    Date of Patent: December 8, 2015
    Assignee: HITACHI AUTOMOTIVE SYSTEMS, LTD.
    Inventors: Mikio Yamashita, Shunsuke Mori
  • Patent number: 9089938
    Abstract: In a frictional engagement arrangement for a carriage supported on, and guided by, at least one guide track and provided with a friction engagement mechanism actuated by a slide wedge drive which includes a pressure member which is engageable with the guide track, the slide wedge drive includes an operating mechanism which is arranged in a multistep through bore extending in parallel with the longitudinal extent of the guide track with the pressure member and a slide wedge cage movably disposed in a bore extending normal to the multi-step through bore.
    Type: Grant
    Filed: August 13, 2011
    Date of Patent: July 28, 2015
    Inventors: Günther Zimmer, Martin Zimmer
  • Publication number: 20150144445
    Abstract: The invention relates to a damping valve, in particular for shock absorbers of vehicles, with an adjustable damping force, in which differently sized outlet openings arranged between an inflow and an outflow can more or less be closed in order to obtain a desired damping effect. To this end, the differently sized outlet openings are more or less sealed off radially by means of a valve slide. In another embodiment, sudden pressure increases in the damping valve are automatically reduced by means of a differential area function. Due to said invention, said damping valve can be produced easily, has low leakage loss, a low tolerance chain and requires little effort for setting the desired damping.
    Type: Application
    Filed: February 6, 2013
    Publication date: May 28, 2015
    Inventors: Frank Zelano, Berndt Niethammer, Klaus Arndt
  • Patent number: 9033122
    Abstract: A vehicle suspension damper is described. The vehicle suspension damper includes: a pilot valve assembly; a primary valve; and an adjuster, wherein the pilot valve assembly meters fluid to the primary valve, and the adjuster moves the primary valve.
    Type: Grant
    Filed: March 15, 2013
    Date of Patent: May 19, 2015
    Assignee: Fox Factory, Inc.
    Inventors: Everet Ericksen, Robert C. Fox, David Batterbee, John Marking
  • Patent number: 9010504
    Abstract: A damper includes a pressure-sensitive damping control circuit that selectively permits fluid flow from a first chamber to a second chamber. A piston varies a volume of the first chamber. A blow-off piston is movable between a closed position, wherein fluid flow through the control circuit is substantially prevented, and an open position, wherein fluid flow through the control circuit is permitted. The damper also includes a first source of pressure. A fluid pressure created by compression of the damper applies an opening force to the blow-off piston moving the blow-off piston in a direction toward the open position against a resistance force provided by the first source of pressure. The resistance force exceeds the opening force until the pressure created by forces tending to insert the piston rod into the first fluid chamber exceeds the pressure in the first source of pressure by a predetermined amount.
    Type: Grant
    Filed: June 20, 2012
    Date of Patent: April 21, 2015
    Assignee: Fox Factory, Inc.
    Inventor: Dustin F. Janes
  • Patent number: 8960385
    Abstract: A pull shock damper for a bicycle comprising a spring device and a damper device, the spring device comprising a positive spring and a gas-operated negative chamber. The damper device comprises a first oil chamber and a second oil chamber connected therewith. The negative chamber abuts the first oil chamber via a piston. A tubular structure extends from the piston through the negative chamber interior up to the end of the negative chamber. The piston rod of the piston extends through the first oil chamber to the exterior.
    Type: Grant
    Filed: May 11, 2011
    Date of Patent: February 24, 2015
    Assignee: DT Swiss Inc.
    Inventor: Martin Achenbach
  • Publication number: 20150047937
    Abstract: Provided is a continuous damping control shock absorber of a dual solenoid valve structure. The continuous damping control shock absorber of the dual solenoid valve structure includes a rebound solenoid valve and a compression solenoid valve. In the continuous damping control shock absorber, a separator tube for interworking prevention is installed to form a connection chamber at a position where the rebound separator tube and the compression separator tube are connected, thereby preventing interworking of the rebound solenoid valve and the compression solenoid valve 40. A communication hole is formed in the compression separator tube to communicate with the connection chamber.
    Type: Application
    Filed: June 15, 2014
    Publication date: February 19, 2015
    Applicant: MANDO CORPORATION
    Inventor: Eun Joong KIM
  • Patent number: 8944222
    Abstract: A damping valve comprises a through-hole forming a passage for a working fluid. A poppet having a center axis is seated on a valve seat around the through-hole. The poppet is housed in a housing so as to be free to slide along the center axis. The poppet is pressed against one wall surface of the housing by a biasing mechanism, that biases the poppet in a direction perpendicular to the center axis, vibration of the poppet is thereby suppressed.
    Type: Grant
    Filed: March 10, 2011
    Date of Patent: February 3, 2015
    Assignee: Kayaba Industry Co., Ltd.
    Inventors: Kouji Ootake, Ryosuke Kamakura, Toshihiro Mori, Yuusuke Matsushita
  • Patent number: 8931602
    Abstract: A shock absorber assembly comprises a piston and cylinder arrangement, a damping-fluid chamber and a damping valve arrangement which is located in the damping fluid chamber and serves to divide the chamber into sub-chambers. The assembly is such that in use the valve arrangement regulates the flow of fluid between the sub-chambers.
    Type: Grant
    Filed: April 9, 2008
    Date of Patent: January 13, 2015
    Inventor: Joseph Richard Andrew Hunter
  • Publication number: 20140353100
    Abstract: Pressure-sensitive vales 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: Application
    Filed: May 6, 2014
    Publication date: December 4, 2014
    Inventors: Dennis K. WOOTTEN, Robert C. FOX, Joshua Benjamin YABLON, David M. HAUGEN
  • Patent number: 8899560
    Abstract: A springless combination shock absorber and suspension apparatus comprising three tubes: An outer tube, a piston tube (inner tube) and a stationary (damping) tube, with a floating piston disposed in the inner piston tube, wherein the floating piston forms two chambers therein, a lower liquid chamber and an upper gas chamber. Fluid dampens shocks by passing through a two-way valve in the outer tube and may be controlled internally by a shim plate positioned over apertures or valve passageways, or, in a separate embodiment, by external adjustment of flow by rotating adjusting plates to open and close the valve passageways. The amount by which the gas chamber is reduced in compression is large enough to generate the high pressures required to produce spring-like forces. This design allows the gas pressure chamber to operate effectively as a spring.
    Type: Grant
    Filed: February 16, 2011
    Date of Patent: December 2, 2014
    Assignee: Elite Suspension Systems, LLC
    Inventors: Mark M. Allen, Nicholas C. Giannopoulos
  • 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
  • Publication number: 20140339034
    Abstract: A damping valve includes an annular valve seat, a valve body, an actuator for driving the valve body and a valve case including a valve hole into which the valve body is slidably inserted. The valve body includes a valve main body and a shaft for transmitting a thrust force of the actuator to the valve main body. The valve main body includes a flange partitioning the interior of the valve hole into a valve seat side chamber and an opposite valve seat side chamber, a shaft portion extending from the flange and a valve head to be seated on and lifted from the valve seat. The valve seat side chamber and the opposite valve seat side chamber communicate via a communication passage and the valve seat side chamber and the flow path communicate via a throttle passage.
    Type: Application
    Filed: October 23, 2012
    Publication date: November 20, 2014
    Applicant: KAYABA INDUSTRY CO., LTD.
    Inventor: Takahisa Mochizuki
  • Publication number: 20140339035
    Abstract: Embodiments may provide a hydromount, an inertial track and a method. The hydromount may a curvilinear inertial track fluidically coupled at a first end to a first fluid chamber, and fluidically coupled at a second end to a second fluid chamber. The hydromount may also include a choke disposed within the inertial track at a predetermined location to reduce a width of a flow path within the inertial track at the predetermined location.
    Type: Application
    Filed: January 2, 2014
    Publication date: November 20, 2014
    Applicant: Ford Global Technologies, LLC
    Inventors: Mary Theresa Breida, Thomas Mathai, Nagari Achar, Hassan Dakhlallah, Margaret Brouwer, Jim Chern
  • Publication number: 20140318041
    Abstract: Provided is a cassette-vibration isolation device that is easy to upkeep (maintain) and that can cause a heavy structure to rise during an earthquake. The device is provided with an upper base and a lower base that are arranged so that the bottom surface of the upper base faces the upper surface of the lower base; a cavity, which is formed between the upper base and the lower base, and the inside of which is filled with fluid; sealing members, which are provided in an attachable/detachable manner along the inner walls of the cavity, and which maintain the state wherein the cavity is filled with fluid; and a valve, which connects the cavity and a fluid-supply source, and which supplies fluid to the inside of the cavity. During an earthquake, the upper base can rise from the lower base due to the supply of fluid via the valve to the inside of the cavity.
    Type: Application
    Filed: November 12, 2012
    Publication date: October 30, 2014
    Inventor: Miho Sakamoto
  • Patent number: 8857580
    Abstract: A damper assembly with a bypass for a vehicle comprises a pressure cylinder with a piston and piston rod for limiting the flow rate of damping fluid as it passes from a first to a second side of said piston. A bypass provides fluid pathway between the first and second sides of the piston separately from the flow rate limitation. In one aspect, the bypass is remotely controllable from a passenger compartment of the vehicle. In another aspect, the bypass is remotely controllable based upon one or more variable parameters associated with the vehicle.
    Type: Grant
    Filed: January 20, 2011
    Date of Patent: October 14, 2014
    Assignee: Fox Factory, Inc.
    Inventor: John Marking
  • Patent number: 8857582
    Abstract: In a hydraulic shock absorber, a damping force generating device is provided between a piston side oil chamber and a rod side oil chamber of a cylinder, and in a compression stroke, a compression side flow path for circulating oil in the piston side oil chamber of the cylinder through an outside flow path of the cylinder toward the rod side oil chamber is provided in the damping force generating device, while in an extension stroke, an extension side flow path for circulating the oil in the rod side oil chamber of the cylinder through the outside flow path of the cylinder toward the piston side oil chamber is provided in the damping force generating device.
    Type: Grant
    Filed: June 11, 2010
    Date of Patent: October 14, 2014
    Assignee: Showa Corporation
    Inventor: Yosuke Murakami
  • Publication number: 20140291091
    Abstract: The invention relates to a pressure regulator in a shock absorber valve. The pressure regulator comprises an axially movable first valve part and a first seat, which are arranged in a valve housing in such a way that an adjustable flow opening is created between the parts. The flow opening is arranged to restrict a damping medium flow (q) and its flow opening size (s) is determined by a force balance on the first valve part. The force balance is principally or partially created by the sum of an actuating force (F) and the force (Fs) from a spring arrangement counter to the action of a counter holding regulator force (R). The spring arrangement comprises a first spring having a first spring constant (kI) and a second spring having a second spring constant (k2).
    Type: Application
    Filed: June 16, 2014
    Publication date: October 2, 2014
    Inventors: Lars Sönsteröd, Arnold Hovén
  • Patent number: 8844912
    Abstract: A shock absorber for a vehicle, having a bellows piston, bellows, and a fluid as the damping medium. The shock absorber has a first partition wall, which is situated on the bellows piston, and is implemented to separate a volume area of the bellows piston from a volume area of the bellows. The first partition wall has a first opening, which is implemented to limit a fluid flow between the volume area of the bellows piston and the volume area of the bellows. The shock absorber further has a sprung mass, which is situated inside the shock absorber to influence the fluid flow inside the shock absorber.
    Type: Grant
    Filed: April 8, 2009
    Date of Patent: September 30, 2014
    Assignee: Knorr-Bremse Systeme fuer Nutzfahrzeuge GmbH
    Inventor: Thomas Naber
  • 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
  • Patent number: 8807542
    Abstract: A method and apparatus for a vehicle shock absorber comprising a main damper cylinder, a first reservoir and a second reservoir. One embodiment includes a first operational mode where both reservoirs are in fluid communication with the cylinder. In a second operational mode, only one reservoir communicates with the cylinder during fluid evacuation from the cylinder. In each mode, rebound from either or both reservoirs may travel through a single, user-adjustable metering device.
    Type: Grant
    Filed: June 4, 2010
    Date of Patent: August 19, 2014
    Assignee: Fox Factory, Inc.
    Inventors: Mario Galasso, Dennis K. Wootten, Bryan Wesley Anderson
  • Patent number: 8807300
    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 commingles 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: Grant
    Filed: October 8, 2010
    Date of Patent: August 19, 2014
    Assignee: Fox Factory, Inc.
    Inventor: John Marking
  • Publication number: 20140224607
    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: Application
    Filed: April 18, 2014
    Publication date: August 14, 2014
    Inventors: William M. Becker, Brian Lampman
  • Patent number: 8800732
    Abstract: A hydraulic damper assembly includes a main body, a shaft assembly and a main piston operatively configured to define an upper portion and a lower portion within the main body. A hydraulic damper spool valve is adapted to provide a single path, variable hydraulic flow restriction between the upper portion and lower portion of the main body. The hydraulic damper spool valve is configured with an array of precisely shaped flow apertures that are proportionally opened and closed by a pair of valve spools in response to the pressure differential across the main piston. The damper's pressure-flow operating characteristic is simply and predictably dictated by the geometric configuration of the shaped flow apertures. The precisely defined open area of the shaped flow apertures provides a mathematically predictable hydraulic flow restriction that operates predominately in a turbulent regime resulting in insensitivity to hydraulic fluid viscosity and consequently temperature change.
    Type: Grant
    Filed: February 25, 2011
    Date of Patent: August 12, 2014
    Assignee: Multimatic Inc.
    Inventors: Laurence J. Holt, Damian O'Flynn, Andrew Tomlin
  • Patent number: 8801017
    Abstract: A damper assembly for a vehicle suspension system includes a primary damper and a secondary damper. The secondary damper is coupled to the primary damper and includes a housing and an annular piston. The housing includes a sidewall that partially surrounds the primary damper, and the volume between the sidewall and the primary damper defines a damping chamber. The sidewall defines a plurality of apertures. The annular piston is positioned within the damping chamber and slidably coupled to the sidewall. The primary damper provides a base damping force and the secondary damper provides a supplemental damping force that varies based on the position of the annular piston along the housing.
    Type: Grant
    Filed: March 10, 2013
    Date of Patent: August 12, 2014
    Assignee: Oshkosh Corporation
    Inventors: Erik S. Ellifson, Patrick S. Dillman, Jason J. Zuleger, Aaron J. Rositch, Robert K. Sollenskog
  • Patent number: 8794400
    Abstract: A damping force adjustable hydraulic shock absorber, in which response delay of a pressure control valve and self-excited vibration of a valve body can be prevented. A damping force is generated by controlling an oil flow between an annular oil passage (21) and a reservoir (4) generated by sliding movement of a piston in a cylinder with use of a back-pressure type main valve (27) and a pressure control valve (28). The damping force is directly generated by the pressure control valve, and valve-opening pressure of the main valve is adjusted by adjusting an inner pressure of a back-pressure chamber. In the pressure control valve, a valve spring is disposed between a valve body and a plunger. A mass of the valve body is sufficiently less than that of the plunger, and a spring stiffness of the valve spring is higher than that of a plunger spring.
    Type: Grant
    Filed: March 31, 2009
    Date of Patent: August 5, 2014
    Assignee: Hitachi, Ltd.
    Inventors: Takao Nakadate, Takashi Nezu, Yohei Katayama, Shigeo Katayama, Hiroyuki Yabe
  • Patent number: 8794405
    Abstract: Oil grooves of a shutter and oil holes of a stepped rod constitute first orifices as variable orifices whose opening areas are variable according to the rotational position of the shutter. The oil grooves of the shutter and oil holes of the stepped rod constitute third orifices as variable orifices. Cut portions of inner disk valves constitute second orifices. The opening areas of the variable orifices are changed by rotating the shutter, thereby controlling damping force characteristics in a low piston speed region and the relief pressures of pressure control valves independently of each other, and thus increasing the degree of freedom for adjusting the damping force characteristics.
    Type: Grant
    Filed: December 28, 2011
    Date of Patent: August 5, 2014
    Assignee: Hitachi Automotive Systems, Ltd.
    Inventors: Mikio Yamashita, Fumiyuki Yamaoka
  • Patent number: 8794407
    Abstract: A shock absorber has a valve assembly having a valve that is biased away from a valve body. A controlled restriction is defined between the valve and the valve body. During stroking of the piston of the shock absorber, the valve moves toward the valve body to close the restriction. The valve assembly can be used in the piston assembly, the base valve assembly or both.
    Type: Grant
    Filed: November 18, 2009
    Date of Patent: August 5, 2014
    Assignee: Tenneco Automotive Operating Company Inc.
    Inventors: Ronny Vanbrabant, Bert Diels, Jean-Marie Tuts, Vincent Bailly, Kristoff Six
  • Patent number: 8789667
    Abstract: An adjustable damping valve device for a vibration damper includes a housing with an axially movable valve body. The valve body has in the direction of a valve seat surface a pressure-loaded surface AOED which is operative in the lift direction of the valve body and a surface ACloseD which is loaded by pressure in the closing direction, wherein a resultant force comprising a force of at least one valve spring and an actuating force of an actuator acts on the valve body, and wherein an additional surface ACloseD2 of the valve body is pressure loaded by damping medium in closing direction of the valve body. The damping valve device has an emergency operation valve by means of which a pressure level can be at least indirectly adjusted in a control space for an emergency operation. The emergency operation valve is operative only in one flow direction.
    Type: Grant
    Filed: July 12, 2012
    Date of Patent: July 29, 2014
    Assignee: ZF Friedrichshafen AG
    Inventors: Steffen Heyn, Andreas Föster
  • Patent number: 8770363
    Abstract: The invention relates to a pressure regulator (1) in a shock absorber valve. The pressure regulator (1) comprises an axially movable first valve part (4) and a first seat (3), which are arranged in a valve housing (2) in such a way that an adjustable flow opening is created between the parts (3, 4). The flow opening is arranged to restrict a damping medium flow (q) and its flow opening size (s) is determined by a force balance on the first valve part (4). The force balance is principally or partially created by the sum of an actuating force (F) and the force (Fs) from a spring arrangement counter to the action of a counter holding regulator force (R). The spring arrangement comprises a first spring (5) having a first spring constant (k1) and a second spring (6) having a second spring constant (k2).
    Type: Grant
    Filed: June 23, 2009
    Date of Patent: July 8, 2014
    Assignee: Ohlins Racing AB
    Inventors: Lars Sönsteröd, Arnold Hovén
  • Patent number: 8770360
    Abstract: A front bicycle suspension assembly having an inertia valve is described. The front bicycle suspension assembly may include at least upper and lower telescoping tubes and include a damping tube containing an inertia valve. The inertia valve may include an inertia mass movable along the outer surface of a valve shaft as the inertia valve moves between first and second positions.
    Type: Grant
    Filed: October 29, 2012
    Date of Patent: July 8, 2014
    Assignee: Fox Factory, Inc.
    Inventor: Robert C. Fox
  • Patent number: 8752681
    Abstract: An integrated and self-contained suspension assembly having a gas spring integrated with a shock absorber (damper) is described. The rigid gas cylinder of the air spring is divided into a first gas chamber and a second gas chamber. A flow port connects the first and second gas chambers, and can be manually opened or closed by valve and a simple one-quarter turn rotation of an external knob to instantly switch the gas spring between two different spring rates. The different spring rates are functions of the separate or combined volumes of the two. gas chambers. The integrated suspension assembly is compactly packaged and self-contained, i.e., does not require any externalities, such as gas sources or electricity, to operate.
    Type: Grant
    Filed: April 27, 2010
    Date of Patent: June 17, 2014
    Assignee: Fox Factory, Inc.
    Inventor: Robert C. Fox
  • Patent number: 8746423
    Abstract: A shock absorber has an inclined surface that is inclined to a moving direction of the free piston in at least one of a free piston contact surface of a free surface with which an elastic body is in contact and a housing contact surface of a housing with which the elastic body is in contact. A shortest distance between the free piston contact surface and the housing contact surface is changed by movement of the free piston.
    Type: Grant
    Filed: February 28, 2011
    Date of Patent: June 10, 2014
    Assignee: Hitachi Automotive Systems, Ltd.
    Inventors: Atsushi Maeda, Masaru Kouyama, Mikio Yamashita, Fumiyuki Yamaoka
  • Patent number: 8739948
    Abstract: A valve assembly for a shock absorber includes a valve body defining a fluid passage. A valve disc engages the valve body to close the fluid passage. A fulcrum disc engages the valve disc at a first position and a second position radially outward from the first position. The fulcrum disc is designed such that the second position is closer to the valve body. In one embodiment, the fulcrum disc is concave with respect to the valve body.
    Type: Grant
    Filed: February 4, 2011
    Date of Patent: June 3, 2014
    Assignee: Tenneco Automotive Operating Company Inc.
    Inventor: John Patrick McGahey
  • Patent number: 8727080
    Abstract: A shock absorber having a valve controlling the flow rate of fluid between a compression chamber and a rebound chamber in a housing and separated by a piston. The valve has an orifice component and a blocker component, one of which has a permanent magnet, and the other of which has a magnetically permeable material. Upon the application of sufficient fluid pressure, the blocker component is forced away from the orifice component, despite the magnetic bias that tends to attract the two structures. Because the magnetic force decreases as the two components are spaced farther apart, the shock absorber has excellent performance characteristics. Alternatively, a mechanical spring urges the blocker closed, and magnetic attraction between the blocker and a spaced opener mitigates the increased force of the compressed spring tending to close the valve.
    Type: Grant
    Filed: January 6, 2012
    Date of Patent: May 20, 2014
    Assignee: Eko Sport, Inc.
    Inventor: Darek C. Barefoot
  • Publication number: 20140124313
    Abstract: A vehicle suspension damper is described. The vehicle suspension damper includes: a pilot valve assembly; a primary valve; and an adjuster, wherein the pilot valve assembly meters fluid to the primary valve, and the adjuster moves the primary valve.
    Type: Application
    Filed: March 15, 2013
    Publication date: May 8, 2014
    Inventors: Everet Ericksen, Robert C. Fox, David Batterbee, John Marking
  • Publication number: 20140124314
    Abstract: A shock absorber includes a damping force adjustment mechanism having a flow passage that allows the fluid from a cylinder, a valve seat, a valve body, and a stepper motor that adjusts a flow passage area by driving the valve body. A valve body position in which step-out may occur in the stepper motor if the valve body is moved further toward the valve seat therefrom is set as a step-out boundary position, a zone between a seated position in which the valve body is seated on the valve seat and the step-out boundary position is set as a step-out zone, and when the valve body is to be moved to the seated position through the step-out zone, the stepper motor is energized to move the valve body by a distance that is at least twice a distance to the seated position.
    Type: Application
    Filed: June 14, 2012
    Publication date: May 8, 2014
    Applicant: KAYABA INDUSTRY CO., LTD.
    Inventors: Takahisa Mochizuki, Yuuki Amano
  • Patent number: 8702179
    Abstract: A brake system for a vehicle includes brake cylinders operated by pressurized fluid for actuation of brakes by means of pressurized fluid on at least one first axle of the vehicle. The brakes on at least one other, second, axle can be actuated exclusively electromechanically in response to an electrical braking request signal. The pressure of the pressurized fluid can be modulated indirectly or directly and the electrical braking request signal can be generated indirectly or directly in response to actuation of a brake pedal of a brake pedal device. A service brake function is provided by means of hybrid use of the brakes on the first axle(s) together with the brakes on the second axle(s). The brake cylinders operated by pressurized fluid are pneumatically operated brake cylinders. The pressure modulated by the brake pedal device is a pneumatic pressure, and the pressurized fluid is compressed air.
    Type: Grant
    Filed: December 23, 2008
    Date of Patent: April 22, 2014
    Assignee: WABCO GmbH
    Inventors: Peter Beier, Henning Förster, Hartmut Rosendahl, Gerhard Bruns, Olaf Jantz, Wolfgang Strache
  • Patent number: 8695768
    Abstract: A shock absorber comprises a first cylinder including an inside bore; a piston dividing the inside bore of the first cylinder into a first chamber and a second chamber; a piston rod which extends within the first chamber; a second cylinder surrounding the first cylinder; a first connection passage arranged to connect the first chamber to a location outside of the shock absorber; a first tube member defining a second connection passage connected with the second chamber at the second end of the first cylinder; and a damping device comprising at least one valve element, the damping device being disposed between the second chamber and the second connection passage. The piston is configured to separate the first and second chambers so that the first and second chambers are not in fluid communication with each other through the piston.
    Type: Grant
    Filed: July 9, 2007
    Date of Patent: April 15, 2014
    Assignee: Nissan Motor Co., Ltd.
    Inventor: Kazuhiro Kiriyama
  • Publication number: 20140097593
    Abstract: In a movement damping apparatus, a magnetorheological fluid is pressed through a flow path. A device generating a variable magnetic field comprises a core around which a coil is wound as well as pole surfaces in the flow path, the magnetic field acting on the magnetorheological fluid by means of said pole surfaces. The coil is arranged within the flow path along with the core, the axis of the coil extending perpendicular to the direction of flow of the magnetorheological fluid. The flow path has a jacket made of a magnetically conducting material.
    Type: Application
    Filed: March 13, 2013
    Publication date: April 10, 2014
    Applicant: INVENTUS ENGINEERING GMBH
    Inventor: Inventus Engineering GmbH
  • Patent number: 8689954
    Abstract: A vehicle suspension system that inhibits a pressure within a gas chamber from reducing below a threshold value. In one arrangement, the suspension system includes a shock absorber associated with a motorcycle. The shock absorber includes an upper gas chamber that is filled with air. An air pressure adjustment valve operates to supply air into the upper gas chamber from a supply of air outside of the shock absorber when the air pressure in the upper gas chamber becomes smaller than a lower threshold value.
    Type: Grant
    Filed: July 18, 2007
    Date of Patent: April 8, 2014
    Assignee: Yamaha Hatsudoki Kabushiki Kaisha
    Inventor: Takamasa Kamioka