WO2011125515A1 - リーフバルブ構造 - Google Patents
リーフバルブ構造 Download PDFInfo
- Publication number
- WO2011125515A1 WO2011125515A1 PCT/JP2011/057159 JP2011057159W WO2011125515A1 WO 2011125515 A1 WO2011125515 A1 WO 2011125515A1 JP 2011057159 W JP2011057159 W JP 2011057159W WO 2011125515 A1 WO2011125515 A1 WO 2011125515A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- leaf
- valve
- valve seat
- cylinder
- valve structure
- Prior art date
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
- F16F9/32—Details
- F16F9/34—Special valve constructions; Shape or construction of throttling passages
- F16F9/348—Throttling passages in the form of annular discs or other plate-like elements which may or may not have a spring action, operating in opposite directions or singly, e.g. annular discs positioned on top of the valve or piston body
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F2222/00—Special physical effects, e.g. nature of damping effects
- F16F2222/10—Adhesion
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F2230/00—Purpose; Design features
- F16F2230/36—Holes, slots or the like
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T137/00—Fluid handling
- Y10T137/7722—Line condition change responsive valves
- Y10T137/7837—Direct response valves [i.e., check valve type]
- Y10T137/7858—With means for selecting area of valve or seat
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T137/00—Fluid handling
- Y10T137/7722—Line condition change responsive valves
- Y10T137/7837—Direct response valves [i.e., check valve type]
- Y10T137/7904—Reciprocating valves
- Y10T137/7922—Spring biased
- Y10T137/7929—Spring coaxial with valve
- Y10T137/7932—Valve stem extends through fixed spring abutment
Definitions
- This invention relates to a damping valve for a fluid pressure buffer.
- a fluid pressure buffer that absorbs road vibration input to the vehicle includes a damping valve that provides resistance to the flow of the working fluid and attenuates the vibration.
- JP01-111840U issued in 1996 by the Japan Patent Office proposes a damping valve structure for reducing the influence of the viscosity of the working fluid on the generated damping force.
- the damping valve includes a main leaf valve seated on the valve seat and a sub leaf valve seated in a hole formed in the main leaf valve.
- valve seat of the leaf valve is formed of a sintered alloy having a lower hardness than the leaf of the leaf valve.
- the top of the valve seat that contacts the leaf is generally formed on a smooth surface by sizing or the like.
- the leaf valve will stick to the top of the valve seat with a high surface adsorption force.
- a pressure larger than a normal cracking pressure may be required.
- the object of the present invention is to reduce the influence of the difference in the viscosity of the working fluid on the cracking pressure of the leaf.
- a leaf valve structure according to the present invention is seated on a valve seat under a predetermined elastic support force against the pressure of an annular valve seat and a working fluid inside the valve seat.
- the valve seat is formed with recesses having openings on the inner periphery of the valve seat and on the seating surface of the leaf.
- FIG. 1 is a schematic longitudinal sectional view of a fluid pressure shock absorber provided with a base valve having a leaf valve structure according to the present invention.
- FIG. 2 is an enlarged longitudinal sectional view of the base valve.
- FIG. 3 is a plan view of the valve seat according to the present invention.
- the leaf valve structure according to the present invention is applied to, for example, a base valve 5 of a hydraulic shock absorber that absorbs road surface vibration input to a vehicle.
- the hydraulic shock absorber includes a cylinder 1, a piston rod 2 that is slidably inserted into the cylinder 1 from the axial direction, and a piston 3 that is fixed to the tip of the piston rod 2 and that is in sliding contact with the inner periphery of the cylinder 1.
- the piston 3 defines an oil chamber R1 on the piston rod 2 side and an oil chamber R2 on the opposite side.
- the cylinder 1 is accommodated coaxially inside the outer tube 4.
- One end of the outer tube 4 and the cylinder 1 in the axial direction is sealed by a rod guide 11.
- the other end of the outer tube 4 and the cylinder 1 in the axial direction is sealed by the bottom block 12.
- the piston rod 2 penetrates the rod guide 11 freely in the axial direction.
- a reservoir R is provided between the outer tube 4 and the cylinder 1.
- the reservoir R compensates for the oil amount fluctuation in the cylinder 1 due to the piston rod 2 entering the cylinder 1 and withdrawing from the cylinder 1. Gas is sealed above the oil level of the reservoir R.
- the piston 3 includes an extension-side damping valve 31 that permits the flow of hydraulic oil from the oil chamber R1 on the piston rod 2 side to the oil chamber R2 on the opposite side of the piston rod 2 with a predetermined flow resistance, and a piston rod 2 is provided with a compression-side damping valve 32 that permits the flow of hydraulic oil from the oil chamber R2 on the opposite side to 2 to the oil chamber R1 on the piston rod 2 side under a predetermined flow resistance. It is also possible to replace the compression side damping valve 32 with a check valve that allows the flow of hydraulic oil from the oil chamber R2 on the opposite side of the piston rod 2 to the oil chamber R1 on the piston rod 2 side without resistance.
- the base valve 5 is provided on the bottom block 12.
- the base valve 5 has a compression-side damping valve 51 that allows the hydraulic oil to flow out from the oil chamber R2 on the opposite side of the piston rod 2 to the reservoir R under a predetermined flow resistance, and resists the flow of hydraulic oil in the opposite direction. It consists of a check valve 52 that allows it.
- the hydraulic shock absorber attenuates vibrations input to the vehicle body from the road surface via the axle under the above structure.
- the hydraulic shock absorber connects the piston rod 2 to the vehicle body, the upright type that connects the outer tube 4 to the vehicle axle, the outer tube 4 connects to the vehicle body, and the piston rod 2 connects to the vehicle axle. Any type of an inverted type may be used.
- the bottom block 12 includes a valve disk 50.
- the base valve 5 includes a compression side damping valve 51 and a check valve 52.
- the compression-side damping valve 51 is provided at the outlet communicating with the reservoir R of the compression-side passage 50a formed through the valve disk 50.
- the check valve 52 is provided at an outlet facing the oil chamber R2 of the expansion side passage 50b that penetrates the valve disk 50 outside the compression side passage 50a.
- the compression side damping valve 51 is composed of a laminate of a plurality of leaves.
- the laminated body is sandwiched between the valve head 50a of the bolt 56 passing through the center of the valve disc 50 and the valve disc 50, and is seated on the valve seat 55 formed on the valve disc 50 so that the contraction side passage 50a is formed. Close.
- the bolt 56 penetrating the center of the valve disc 50 further penetrates the cylindrical spacer 56b and the dish-shaped valve stopper 57.
- a nut 59 is tightened on the through end 56 c of the bolt 56.
- the check valve 52 includes a single circular leaf 52a that fits on the outer periphery of the spacer 56b, and valve seats 53 and 54 that are formed on the valve disc 50 as an annular bulge centered on the bolt 56.
- the check valve 52 closes the outlet of the extension side passage 50b by seating the leaf 52a on the valve seats 53 and 54.
- a hole 52b that always communicates between the contraction side passage 50a and the oil chamber R2 is formed at a portion of the leaf 52a facing the inlet of the contraction side passage 50a.
- the leaf 52a is urged toward the valve seats 53 and 54 by a return spring 58 interposed between the leaf 52a and the valve stopper 57 outside the spacer 56b.
- the leaf 52a is lifted from the valve seats 53 and 54 when the pressure in the reservoir R exceeds the pressure in the oil chamber R2 due to the pressure drop in the oil chamber R2 on the opposite side of the piston rod 2, and the hydraulic oil in the reservoir R is oiled without resistance Flow into chamber R2.
- the valve stopper 57 limits the lift position of the leaf 52a by abutting the outer periphery with the leaf 52a.
- FIG. 3 an annular groove 50c communicating with the expansion side passage 50b is formed in the valve disc 50 between the outer valve seat 53 on which the leaf 52a is seated and the inner valve seat 54.
- a plurality of recessed portions 53a for guiding the pressure of the annular groove 50c to the joint surface between the leaf 52a and the valve seat 53 are formed at predetermined intervals in the circumferential direction.
- the valve seat 53 still has a joint surface with the leaf 52a even in the radially outer portion of the recessed portion 53a. In other words, even if the recessed portion 53a is formed, the valve seat 53 maintains the joint surface with the leaf 52a without interruption throughout the entire circumference.
- the recessed portion 53a is formed by a notch that opens to a seating surface of the valve seat 53 on which the leaf 52a is seated and an inner peripheral surface facing the annular groove 50c.
- the joint surface located on the outer side in the radial direction of the concave portion 53a is narrowed in the radial direction by the concave portion 53a.
- variety of the valve seat 53 of the both sides of the circumferential direction of the recessed part 53a is wider than this. Therefore, the bonding surface located on the radially outer side of the recessed portion 53a has a smaller surface adsorbing force exerted on the leaf 52a by the valve seat 53 than the bonding surfaces of other portions.
- the hydraulic oil pressure inside the valve seat 54 is always guided to the recessed portion 53a. Therefore, when this pressure rises relatively with respect to the pressure in the oil chamber R2, the valve of the leaf 52a is formed around the recessed portion 53 including the joint surface having a narrow radial width located outside the recessed portion 53a in the radial direction. Peeling from the sheet 53 is promoted. The separation at the joint surface leads the separation of the leaf 52a from the valve seat 53 at the other part, so that the leaf 52a is lifted with good response to the change in the relative pressure between the oil chamber R2 and the reservoir R.
- the check valve 52 responds when the pressure in the expansion side passage 50b reaches the cracking pressure even when the viscosity of the hydraulic oil is high at low temperatures. Works well.
- the leaf 52a When the recessed part 53a is not provided in the valve seat 53, the leaf 52a is not lifted until the upstream pressure greatly exceeds the cracking pressure due to the surface adsorption force of the valve seat 53, and then the noise is caused by suddenly lifting. May be emitted. Further, if the cracking pressure of the leaf 52a is not constant, the damping characteristic of the hydraulic shock absorber may not be stable. By providing the recessed portion 53a in the valve seat 53, such a problem can be solved, and a hydraulic shock absorber having a quiet and stable damping force characteristic can be realized.
- the check valve 52 opens when the hydraulic shock absorber is extended to allow the reservoir R to flow into the oil chamber R2.
- the differential pressure generated in the reservoir R and the oil chamber R2 is smaller than, for example, the differential pressure between the oil chamber R1 and the oil chamber R2.
- the hydraulic pressure acting in the lift direction on the leaf 52a inside the valve seat 53 is also small. Accordingly, the surface adsorption force of the valve seat 53 with respect to the leaf 52a has a great influence on the start of the valve lift.
- alternately changing the radial width of the valve seat 53 has a particularly great effect in eliminating the influence of the surface adsorption force.
- the mold separation at the time of forming the valve seat 53 can be improved by making the shape of the tip of the recessed portion 53a located on the opposite side of the opening of the recessed portion 53a into a curved surface.
- the recessed portion 53a is formed over the entire circumference of the valve seat 53, but it may be formed only in a partial angular region in the circumferential direction of the valve seat 53. Also in this case, the leaf 52a is easily peeled off from the valve seat 53 in the region where the recessed portion 53a is formed, so that the effect of promoting the lift of the entire leaf 52a is obtained.
- the leaf valve structure according to the present invention is applied to the check valve 52 of the base valve 5.
- the leaf valve structure according to the present invention can also be applied to the compression-side damping valve 51 of the base valve 5.
- the leaf valve structure according to the present invention can also be applied to the expansion side damping valve 31 or the compression side damping valve 32 provided on the piston 3.
- a corresponding effect can be expected even when the recessed portion 53a is formed not on the outer valve seat 53 but on the inner valve seat 54.
- the fluid targeted by the leaf valve structure according to the present invention is not limited to hydraulic oil, and may be any fluid including an aqueous solution.
- the influence of the difference in the viscosity of the working fluid on the cracking pressure of the leaf valve can be reduced. Therefore, by applying the present invention to a fluid pressure damper that attenuates the vibration of the vehicle, a favorable effect can be obtained with respect to stabilization of damping force characteristics and suppression of abnormal noise generation.
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Fluid-Damping Devices (AREA)
Abstract
Description
Claims (7)
- 環状のバルブシートと;
バルブシートの内側の作動流体の圧力に抗して所定の弾性支持力のもとでバルブシートに着座するリーフと、を備え、
バルブシートの内周とリーフの着座面にとにそれぞれ開口部を有する凹陥部をバルブシートに形成したリーフバルブ構造。 - 凹陥部の外側に位置するバルブシートのリーフとの着座面のラジアル方向の幅は、凹陥部を形成していないバルブシートの他の部位の着座面のラジアル方向の幅より狭い請求項1のリーフバルブ構造。
- 複数の凹陥部を等しい角度間隔でバルブシートに形成した、請求項1のリーフバルブ構造。
- バルブシートとバルブシートの内側に至る流体通路とを形成したバルブディスクと、リーフをバルブシートに向けて弾性支持するスプリングとをさらに備える、請求項1のリーフバルブ構造。
- バルブディスクには流体通路に連通する環状溝が形成され、バルブシートは環状溝の内周を画成する内周側バルブシートと外周を画成する外周側バルブシートとを備えるとともに、凹陥部を外周バルブシートに形成して、環状溝に連通させた、請求項4のリーフバルブ構造。
- 流体室と、流体室の低圧化に応じて流体室に作動流体を供給するリザーバとを備える流体圧緩衝器において、リザーバから流体室への作動流体の流れを許容し、逆向きの作動流体の流れを遮断するチェック弁を構成する、請求項5のリーフバルブ構造。
- 流体圧緩衝器はシリンダと、シリンダに摺動自由に侵入するピストンロッドと、ヒストンロッドに固定され、シリンダの内周面に摺接するピストンとをさらに備え、流体室はピストンロッドのシリンダからの退出に伴って拡大するよう構成され、バルブディスクはシリンダの底部を構成する、請求項6のリーフバルブ構造。
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US13/512,646 US9200692B2 (en) | 2010-04-02 | 2011-03-24 | Leaf valve structure |
DE112011101182.2T DE112011101182B4 (de) | 2010-04-02 | 2011-03-24 | Klappenventilaufbau |
CN201180004841.4A CN102656386B (zh) | 2010-04-02 | 2011-03-24 | 叶片阀结构 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2010-086051 | 2010-04-02 | ||
JP2010086051A JP5681372B2 (ja) | 2010-04-02 | 2010-04-02 | 減衰部構造 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2011125515A1 true WO2011125515A1 (ja) | 2011-10-13 |
Family
ID=44762469
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2011/057159 WO2011125515A1 (ja) | 2010-04-02 | 2011-03-24 | リーフバルブ構造 |
Country Status (5)
Country | Link |
---|---|
US (1) | US9200692B2 (ja) |
JP (1) | JP5681372B2 (ja) |
CN (1) | CN102656386B (ja) |
DE (1) | DE112011101182B4 (ja) |
WO (1) | WO2011125515A1 (ja) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP5681372B2 (ja) | 2010-04-02 | 2015-03-04 | カヤバ工業株式会社 | 減衰部構造 |
WO2014178350A1 (ja) | 2013-04-30 | 2014-11-06 | アイシン・エィ・ダブリュ株式会社 | 変速装置 |
CN103539016A (zh) * | 2013-11-12 | 2014-01-29 | 湖州洋西起重设备有限公司 | 用于电缆拖令的弹性缓冲器 |
CN111750113B (zh) * | 2020-07-01 | 2022-04-05 | 合肥市久环给排水燃气设备有限公司 | 一种燃气调压专用设备 |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5973610A (ja) * | 1982-10-20 | 1984-04-25 | Tokico Ltd | 油圧緩衝器 |
JPS61156742U (ja) * | 1985-03-20 | 1986-09-29 | ||
JPH02278026A (ja) * | 1989-04-20 | 1990-11-14 | Tokico Ltd | 油圧緩衝器 |
JP2007071236A (ja) * | 2005-09-05 | 2007-03-22 | Kayaba Ind Co Ltd | バルブ構造 |
Family Cites Families (16)
Publication number | Priority date | Publication date | Assignee | Title |
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NL291950A (ja) | 1962-04-26 | 1900-01-01 | ||
GB1051263A (ja) | 1963-01-19 | 1900-01-01 | ||
AT258138B (de) | 1963-05-07 | 1967-11-10 | Allinquant Fernand St | Doppeltwirkendes Ventil, insbesondere für Stoßdämpfer |
DE2424040C3 (de) | 1974-05-17 | 1981-07-30 | Boge Gmbh, 5208 Eitorf | Kolben von Schwingungsdämpfern, insbesondere für Kraftfahrzeuge |
US4350179A (en) * | 1980-09-26 | 1982-09-21 | Bunn Stuart E | Valve assembly with relief groove |
US4398559A (en) * | 1980-09-26 | 1983-08-16 | Ball Vavle Company, Inc. | Valve member and assembly with inlet and outlet pressure relief grooves |
US5042624A (en) * | 1988-09-29 | 1991-08-27 | Atsugi Unisia Corporation | Hydraulic shock absorber with pre-loaded valve for linear variation characteristics of damping force |
JPH01111840U (ja) | 1988-12-08 | 1989-07-27 | ||
ES2115429B1 (es) | 1993-05-10 | 1999-02-16 | Fichtel & Sachs Ag | Valvula para un amortiguador de vibraciones telescopico hidraulico. |
DE4404835A1 (de) | 1994-02-16 | 1995-08-17 | Fichtel & Sachs Ag Werk Eitorf | Dämpfventil für einen Schwingungsdämpfer |
US5595269A (en) * | 1993-05-10 | 1997-01-21 | Fichtel & Sachs Ag | Vibration damper for a motor vehicle |
US6260678B1 (en) * | 1999-08-31 | 2001-07-17 | Delphi Technologies, Inc. | Digressive base valve for automotive damper |
US6230858B1 (en) * | 1999-08-31 | 2001-05-15 | Delphi Technologies, Inc. | Internally slotted orifice disc for low speed control in automotive dampers |
JP4955241B2 (ja) * | 2005-09-07 | 2012-06-20 | カヤバ工業株式会社 | 油圧緩衝器の減衰力発生バルブ構造 |
JP5681372B2 (ja) | 2010-04-02 | 2015-03-04 | カヤバ工業株式会社 | 減衰部構造 |
US9022187B2 (en) * | 2010-07-28 | 2015-05-05 | Kayaba Industry Co., Ltd. | Damping valve for shock absorber |
-
2010
- 2010-04-02 JP JP2010086051A patent/JP5681372B2/ja active Active
-
2011
- 2011-03-24 DE DE112011101182.2T patent/DE112011101182B4/de active Active
- 2011-03-24 US US13/512,646 patent/US9200692B2/en active Active
- 2011-03-24 WO PCT/JP2011/057159 patent/WO2011125515A1/ja active Application Filing
- 2011-03-24 CN CN201180004841.4A patent/CN102656386B/zh active Active
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5973610A (ja) * | 1982-10-20 | 1984-04-25 | Tokico Ltd | 油圧緩衝器 |
JPS61156742U (ja) * | 1985-03-20 | 1986-09-29 | ||
JPH02278026A (ja) * | 1989-04-20 | 1990-11-14 | Tokico Ltd | 油圧緩衝器 |
JP2007071236A (ja) * | 2005-09-05 | 2007-03-22 | Kayaba Ind Co Ltd | バルブ構造 |
Also Published As
Publication number | Publication date |
---|---|
DE112011101182T5 (de) | 2013-01-10 |
JP5681372B2 (ja) | 2015-03-04 |
US9200692B2 (en) | 2015-12-01 |
CN102656386B (zh) | 2015-01-07 |
CN102656386A (zh) | 2012-09-05 |
DE112011101182B4 (de) | 2024-10-17 |
US20120228071A1 (en) | 2012-09-13 |
JP2011214711A (ja) | 2011-10-27 |
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