WO2019155945A1 - シールリング - Google Patents
シールリング Download PDFInfo
- Publication number
- WO2019155945A1 WO2019155945A1 PCT/JP2019/003000 JP2019003000W WO2019155945A1 WO 2019155945 A1 WO2019155945 A1 WO 2019155945A1 JP 2019003000 W JP2019003000 W JP 2019003000W WO 2019155945 A1 WO2019155945 A1 WO 2019155945A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- seal ring
- outer peripheral
- rib
- recess
- circumferential direction
- 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
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/16—Sealings between relatively-moving surfaces
- F16J15/34—Sealings between relatively-moving surfaces with slip-ring pressed against a more or less radial face on one member
- F16J15/3436—Pressing means
- F16J15/3448—Pressing means the pressing force resulting from fluid pressure
-
- 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
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/16—Sealings between relatively-moving surfaces
- F16J15/164—Sealings between relatively-moving surfaces the sealing action depending on movements; pressure difference, temperature or presence of leaking fluid
-
- 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
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/44—Free-space packings
- F16J15/441—Free-space packings with floating ring
-
- 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
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/16—Sealings between relatively-moving surfaces
- F16J15/32—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings
- F16J15/3268—Mounting of sealing rings
- F16J15/3272—Mounting of sealing rings the rings having a break or opening, e.g. to enable mounting on a shaft otherwise than from a shaft end
-
- 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
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S277/00—Seal for a joint or juncture
- Y10S277/91—O-ring seal
Definitions
- each of the recesses has a bottom surface that is a surface facing the outer peripheral side, and the bottom surface is formed on the rib surface so as to sink from one end in the circumferential direction of the recess. On the other hand, it extends obliquely to the other end in the circumferential direction of the recess.
- the bottom surface is a flat surface.
- the bottom surface is a curved surface.
- each of the recesses has a bottom surface that is a surface facing the outer peripheral side, and the bottom surface is located on the inner peripheral side so as to sink from both ends in the circumferential direction of the recess. It is recessed.
- the seal ring according to the first embodiment of the present invention includes a housing of a hydraulic device as an attachment target, and a seal ring in a use state attached to a shaft inserted into a shaft hole that is a through hole formed in the housing.
- the seal ring according to the first embodiment of the present invention includes a housing of a hydraulic device as an attachment target, and a seal ring in a use state attached to a shaft inserted into a shaft hole that is a through hole formed in the housing. It is a partial expanded sectional view in another cross section. It is an expanded side view of the seal ring which shows the modification of the rib part in the seal ring which concerns on the 1st Embodiment of this invention. It is a partial expanded side view which expands and shows a part of side surface of one side of the seal ring which shows schematic structure of the seal ring which concerns on the 2nd Embodiment of this invention.
- FIG. 1 is a side view of one side showing a schematic configuration of a seal ring 1 according to a first embodiment of the present invention
- FIG. 2 is a front view showing a schematic configuration of the seal ring 1.
- 3 is a side view of the other side showing a schematic configuration of the seal ring 1.
- FIG. 4 is a partially enlarged perspective view showing a schematic configuration of the seal ring 1.
- a seal ring 1 according to the present embodiment is a sealing device for sealing an annular gap between a shaft and a shaft hole into which the shaft is inserted, and shafts that rotate relative to each other in a vehicle or a general-purpose machine.
- a shaft hole in which the shaft formed in the housing or the like is inserted is used for sealing.
- the seal ring 1 is used by being attached to a groove formed on an outer peripheral surface of a shaft in order to maintain hydraulic pressure of hydraulic oil.
- the object (attachment object) to which the seal ring 1 which concerns on embodiment of this invention is applied is not restricted above.
- the seal ring 1 has an annular shape around the axis line x, an annular outer peripheral surface 2 around the axis line x facing the outer peripheral side, and an outer peripheral surface 2 formed away from each other in the circumferential direction. And a plurality of recesses 3 recessed on the inner peripheral side.
- the plurality of recesses 3 extend from one side surface 4 to a position not reaching the other side surface 5 in the axis x direction.
- the outer peripheral surface 2 is between the contact surface 6 that is an annular surface between the other side surface 5 and the position that does not reach the other side surface 5 described above, and the recesses 3 adjacent to each other in the circumferential direction of the plurality of recesses 3.
- a rib surface 7 that is a surface extending between one side surface 4 and a position not reaching the other side surface 5 in the direction of the axis x.
- the recesses 3 are the same, and are formed at equal or substantially equal angular intervals around the axis x.
- Each concave portion 3 extends in the axis x direction to a position in the middle of the width of the seal rig 1 in the axis x direction that does not reach the low pressure side surface 5 from the high pressure side surface 4 (groove side surface position L (see FIG. 2)).
- the recess 3 has a rectangular or substantially rectangular shape when viewed from the outer peripheral side in the radial direction.
- the outer peripheral surface 2 has one contact surface 6 and a plurality of rib surfaces 7 as described above.
- the contact surface 6 specifically has a cylindrical surface or a substantially cylindrical shape with the axis line x extending between the low pressure side surface 5 and the groove side surface position L as the center or substantially the center in the axis x direction.
- Each rib surface 7 is a substantially rectangular surface extending in parallel or substantially parallel to the axis x on a cylindrical surface having the axis x as the center or substantially the center, or on the substantially cylindrical surface.
- the outer peripheral surface 2 becomes a sliding surface that contacts the inner peripheral surface of the shaft hole and slides on the inner peripheral surface in a use state to be described later.
- the contact surface 6 and the rib surface 7 become a sliding surface in the use state mentioned later.
- the width of the contact surface 6 in the axis x direction is small.
- FIG. 5 shows the seal ring 1 in a use state in which the seal ring 1 is attached to a shaft 101 inserted into a shaft hole 102 which is a through hole formed in the housing 101 of the hydraulic device 100 as an attachment target and the housing 101. It is a partial expanded sectional view.
- the shaft 110 is rotatable relative to the housing 101, and an annular groove 112 that is recessed toward the center is formed on the outer peripheral surface 111 of the shaft 110.
- the groove 112 has a rectangular or substantially rectangular cross-sectional shape, and is defined by planar side surfaces 113 and 114 and a bottom surface 115.
- an annular space is formed between the inner peripheral surface 103 of the shaft hole 102 and the outer peripheral surface 111 of the shaft 110, and the shaft 110 and the housing 101 are filled with hydraulic oil (not shown).
- a hydraulic path is formed.
- the seal ring 1 is attached to the groove 112 and seals the gap G between the shaft 110 and the shaft hole 102 in order to prevent loss of hydraulic pressure of the hydraulic oil in the hydraulic path.
- the right side of the groove 112 is a hydraulic path
- the left side surface 113 of the groove 112 is a contact side surface pressed against the seal ring 1
- the right side (H side) of the groove 112 is high pressure
- the left side (L side) is low pressure.
- the seal ring 1 is attached to the groove 112 so that the low-pressure side surface 5 faces the contact side surface 113 of the groove 112.
- the seal ring 1 contacts the contact side surface 113 of the groove 112 due to the radial width of the gap G between the shaft hole 102 and the shaft 110 in the hydraulic device 100 to be attached, the eccentricity of the shaft 110, or the like. Without changing the area, the outer peripheral surface 2 (contact surface 6 and rib surface 7) slides on the hydraulic device 100 (the inner peripheral surface 103 of the shaft hole 102) to be attached. For this reason, the sealing performance of the seal ring 1 does not change according to the structure of the hydraulic device 100 to be attached.
- the seal ring 1 is in contact with the inner peripheral surface 103 of the shaft hole 102 in the entire area between the side surfaces 4 and 5 in a range where the rib portion 35 is formed in the use state. Yes. That is, the rib surface 7 of the rib portion 35 is in contact with the inner peripheral surface 103 of the shaft hole 102 even in the range where the recess 3 is formed. For this reason, it can prevent that the contact surface 6 inclines with respect to the internal peripheral surface 103 of the shaft hole 102, and the contact state with respect to the internal peripheral surface 103 of the shaft hole 102 of the contact surface 6 can be stabilized.
- the low-pressure side surface 5 can be prevented from being inclined with respect to the side surface 113 of the groove 112, and the contact state of the low-pressure side surface 5 with the side surface 113 of the groove 112 can be stabilized. Thereby, the sealing performance of the seal ring 1 can be stabilized. Thereby, the width
- the contact area with the inner peripheral surface 103 of the shaft hole 102 of the seal ring 1 can be reduced by the recess 3, and the sliding resistance of the shaft hole 102 with respect to the seal ring 1 can be reduced.
- the seal performance of the seal ring 1 can be prevented from changing according to the structure to be attached.
- the seal ring 1 rotates with the shaft 110, the outer peripheral surface 2 slides with respect to the inner peripheral surface 103 of the shaft hole 102, and the recess 3 extends along the inner peripheral surface 103 of the shaft hole 102. Move. For this reason, the hydraulic oil that has entered the recess 3 moves along the inner peripheral surface 103 of the shaft hole 102 together with the recess 3, and the dynamic pressure effect of the hydraulic oil is generated by the rib portion 35, and the rib surface 7 and the shaft hole 102 An oil film is formed between the inner peripheral surface 103 and the inner peripheral surface 103. Thereby, the sliding resistance added to the seal ring 1 can be reduced.
- the rib portion 35 should have a smooth shape in the rotational direction of the seal ring 1.
- the thickness of the hydraulic oil formed on the rib surface 7 by the dynamic pressure effect can be reduced by making the rib portion 35 have a shape that does not have a corner portion. Can be increased.
- the bottom surface 31 of the recess 3 and the front wall surface 32 are smoothly connected by a curved surface, and the front wall surface 32 and the rib surface 7 are smoothly connected by a curved surface.
- the rib surface 7 and the rear wall surface 33 are smoothly connected by a curved surface, and the rear wall surface 33 and the bottom surface 31 are smoothly connected by a curved surface.
- the bottom surface 31, the front wall surface 32, and the rear wall surface 33 may be smoothly connected to each other by one or more planes extending obliquely instead of a curved surface.
- the rib surface 7, the front wall surface 32, and the rear wall surface 33 are curved surfaces. Instead, they may be smoothly connected by one or more planes extending obliquely.
- the seal ring 10 has a plurality of recesses 40 formed in the circumferential direction in the same manner as the recess 3 of the seal ring 1, and a rib surface between the recesses 40 adjacent to each other. 7 is formed.
- the bottom surface 41 of the recess 40 is recessed toward the inner periphery so as to sink from both ends in the circumferential direction of the recess 40.
- the bottom surface 41 is formed of a bottom portion 42, a front wall portion 43, and a rear wall portion 44, and the bottom portion 42 is a curved surface that curves convexly toward the inner peripheral side, and the front wall portion 43.
- the rear wall 44 is a curved surface that curves convexly toward the outer peripheral side.
- the front wall 43 is smoothly connected to the bottom 42 at the inner peripheral end, and the rear wall 44 is smoothly connected to the bottom 42 on the opposite side of the front wall 43 at the inner peripheral end.
- the bottom surface 41 of the recess 40 forms a smooth curved surface and is defined by the front wall portion 43, the bottom portion 42, and the rear wall portion 44.
- a horizontal wall surface that is a plane or a plane that is orthogonal or substantially orthogonal to the axis line x and extends from the edge on the low-pressure side surface 5 side of the front wall 43, the bottom 42, and the rear wall 44 to the contact surface 6. 45 is formed.
- An annular contact protrusion 36 is defined by the lateral wall surface 45, the contact surface 6, and the low-pressure side surface 5.
- the rib portion 46 is defined by a front wall portion 43 and a rear wall portion 44 that face each other in the circumferential direction, and a rib surface 7 that extends between the front wall portion 43 and the rear wall portion 44.
- the bottom surface 41 of the recess 40 is smoothly connected to the rib surface 7 from the bottom portion 42 via the front wall portion 43 or the rear wall portion 44.
- the dynamic pressure effect of the hydraulic oil in the recess 40 can be enhanced.
- a thicker working oil film can be formed between the rib surface 7 and the inner peripheral surface 103 of the shaft hole 102, and the sliding resistance applied to the seal ring 10 can be further reduced. .
- the seal ring 10 includes An effect of further reducing the applied sliding resistance can be obtained.
- a flat surface or a substantially flat surface extending obliquely with respect to the rib surface 7 so as to sink from the rib surface 7.
- the front wall portion 43 and the rear wall portion 44 are connected at an end portion on the inner peripheral side.
- FIG. 10 is a partially enlarged side view of the side surface on one side of the seal ring 10 showing a second modification of the recess 40 of the seal ring 10 described above.
- the recess 40 according to the second modification extends obliquely with respect to the rib surface 7 to the other end in the circumferential direction of the recess 40 so as to sink from one end in the circumferential direction of the recess 40.
- the bottom surface 41 is an end on the rear side in the seal ring rotation direction of the recess 40, and is circumferentially inclined with respect to the rib surface 7 so as to sink from a front edge in the seal ring rotation direction of the rib surface 7. It extends to.
- a front wall surface 32 that is a flat surface or a substantially flat surface extending in the radial direction extends, and in the concave portion 40, the bottom surface 41 is the other end of the concave portion 40 in the circumferential direction (
- the recess 40 extends to the front end in the seal ring rotation direction, and is connected to the front wall surface 32 here.
- the bottom surface 41 has a rear wall portion 44 extending from the rib surface 7 on the rear side in the seal ring rotation direction, and a bottom portion 42 connected to the rear wall portion 44 on the front side in the seal ring rotation direction.
- the bottom portion 42 is a curved surface that curves convexly toward the inner peripheral side
- the rear wall portion 44 is a curved surface that curves convexly toward the outer circumferential side.
- the rear wall portion 44 is smoothly connected to the bottom portion 42.
- the bottom portion 42 is connected to the front wall surface 32 on the front side in the seal ring rotation direction.
- the bottom surface 41 of the recess 40 forms a smooth curved surface and is defined by the bottom 42 and the rear wall 44.
- the bottom portion 42 may be recessed toward the inner peripheral side with respect to the connection portion with the front wall surface 32, and may not be recessed toward the inner peripheral side with respect to the connection portion with the front wall surface 32.
- the recess 40 according to the above-described modification also acts in the same manner as the above-described recess 40 in the seal ring 2, and has the same effect.
- the rib surface 7 is a surface extending on the cylindrical surface or the substantially cylindrical surface (outer peripheral surface 2) as described above, but the shape of the rib surface 7 is not limited thereto.
- the rib surface 7 may be, for example, a cylindrical surface or a substantially cylindrical surface having a curvature different from that of the outer peripheral surface 2, may be another curved surface, or may be a combination of a flat surface and a curved surface. Further, the rib surface 7 may not form a surface on the outer peripheral surface 2.
- the rib surface 7 may be formed by the outer peripheral side portions of the front wall surface 32 and the rear wall surface 33, where the front wall surface 32 and the rear wall surface 33 are connected on the outer periphery side.
- the rib surface 7 may be formed by the outer wall side portion of the front wall portion 43 and the rear wall portion 44, where the front wall portion 43 and the rear wall portion 44 are connected on the outer circumferential side.
- the rib surface 7 is configured such that the front wall surface 32 or the rear wall surface 33 and the rear wall portion 44 or the front wall portion 43 are connected to each other on the outer peripheral side. Or by the outer peripheral portion of the rear wall 33 and the front wall 43.
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Sealing Devices (AREA)
Abstract
Description
図1は、本発明の第1の実施の形態に係るシールリング1の概略構成を示す一方の側の側面図であり、図2は、シールリング1の概略構成を示す正面図であり、図3は、シールリング1の概略構成を示す他方の側の側面図である。また、図4は、シールリング1の概略構成を示す部分拡大斜視図である。本実施の形態に係るシールリング1は、軸とこの軸が挿入される軸孔との間の環状の隙間の密封を図るための密封装置であり、車両や汎用機械において、互いに相対回転する軸とハウジング等に形成されたこの軸が挿入される軸孔との間を密封するために用いられる。シールリング1は、例えば、自動変速機や無段変速機において、作動油の油圧を保持するために、軸の外周面に形成された溝に取り付けられて用いられる。なお、本発明の実施の形態に係るシールリング1が適用される対象(取付対象)は、上記に限られない。
Claims (6)
- 軸と該軸が挿入される軸孔との間の環状の隙間の密封を図るためのシールリングであって、
軸線周りに環状であり、
外周側に面する前記軸線周りに環状の外周面と、
周方向において互いに離間して形成された前記外周面から内周側に凹む複数の凹部とを備え、
前記複数の凹部は、前記軸線方向において一方の側面から他方の側面に達しない位置までの間に広がっており、
前記外周面は、前記他方の側面から前記他方の側面に達しない位置までの間に環状の面である接触面と、前記複数の凹部の周方向において互いに隣接する凹部の間に、前記軸線方向において前記一方の側面と前記他方の側面に達しない位置との間に延びる面であるリブ面とを有していることを特徴とするシールリング。 - 前記リブ面は、周方向に等間隔に配置されていることを特徴とする請求項1記載のシールリング。
- 前記凹部の各々は、外周側に面する面である底面を有しており、
前記底面は、前記凹部の周方向における一端から沈むように前記リブ面に対して斜めに前記凹部の周方向における他端まで延びていることを特徴とする請求項1又は2記載のシールリング。 - 前記底面は平面であることを特徴とする請求項3記載のシールリング。
- 前記底面は曲面であることを特徴とする請求項3記載のシールリング。
- 前記凹部の各々は、外周側に面する面である底面を有しており、
前記底面は、前記凹部の周方向における両端から沈むように内周側に凹んでいることを特徴とする請求項1又は2記載のシールリング。
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201980006041.2A CN111406171B (zh) | 2018-02-08 | 2019-01-29 | 密封圈 |
DE112019000742.4T DE112019000742T5 (de) | 2018-02-08 | 2019-01-29 | Dichtring |
KR1020207015216A KR102391390B1 (ko) | 2018-02-08 | 2019-01-29 | 밀봉 링 |
JP2019570698A JP6913186B2 (ja) | 2018-02-08 | 2019-01-29 | シールリング |
US16/896,316 US11635147B2 (en) | 2018-02-08 | 2020-06-09 | Seal ring |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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JP2018-020955 | 2018-02-08 | ||
JP2018020955 | 2018-02-08 |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
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US16/896,316 Continuation US11635147B2 (en) | 2018-02-08 | 2020-06-09 | Seal ring |
Publications (1)
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WO2019155945A1 true WO2019155945A1 (ja) | 2019-08-15 |
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Family Applications (1)
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PCT/JP2019/003000 WO2019155945A1 (ja) | 2018-02-08 | 2019-01-29 | シールリング |
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US (1) | US11635147B2 (ja) |
JP (1) | JP6913186B2 (ja) |
KR (1) | KR102391390B1 (ja) |
CN (1) | CN111406171B (ja) |
DE (1) | DE112019000742T5 (ja) |
WO (1) | WO2019155945A1 (ja) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
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WO2019221228A1 (ja) | 2018-05-17 | 2019-11-21 | イーグル工業株式会社 | シールリング |
US20210164571A1 (en) * | 2018-05-17 | 2021-06-03 | Eagle Industry Co., Ltd. | Seal ring |
JP7242659B2 (ja) * | 2018-05-17 | 2023-03-20 | イーグル工業株式会社 | シールリング |
JP7210565B2 (ja) | 2018-05-17 | 2023-01-23 | イーグル工業株式会社 | シールリング |
DE102022112905B3 (de) * | 2022-05-23 | 2023-03-09 | Voith Patent Gmbh | Dichtungssystem |
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JPH02240457A (ja) * | 1989-03-13 | 1990-09-25 | Sanden Corp | 圧縮機のピストンアセンブリ |
JP2014055645A (ja) * | 2012-09-13 | 2014-03-27 | Nok Corp | シールリング |
CN104930193A (zh) * | 2015-06-04 | 2015-09-23 | 霍凤伟 | 一种密封环 |
Family Cites Families (12)
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AU634731B2 (en) | 1988-12-02 | 1993-03-04 | Sanden Corporation | Piston ring having a function which is for facilitating supply of lubricating oil into an annular groove of a piston |
US5722665A (en) * | 1992-02-26 | 1998-03-03 | Durametallic Corporation | Spiral groove face seal |
CN101657661B (zh) * | 2007-04-09 | 2013-02-13 | Nok株式会社 | 密封装置 |
JP2011105513A (ja) | 2009-11-13 | 2011-06-02 | Terabondo:Kk | 重荷物昇降補助装置。 |
JP2011139052A (ja) | 2009-12-04 | 2011-07-14 | Semiconductor Energy Lab Co Ltd | 半導体記憶装置 |
JPWO2011105513A1 (ja) | 2010-02-26 | 2013-06-20 | Nok株式会社 | シールリング |
WO2013137199A1 (ja) | 2012-03-12 | 2013-09-19 | Nok株式会社 | 密封装置及び密封構造 |
WO2014129505A1 (ja) | 2013-02-20 | 2014-08-28 | Nok株式会社 | 密封装置 |
KR101889143B1 (ko) | 2013-06-03 | 2018-08-16 | 엔오케이 가부시키가이샤 | 실 링 |
WO2015111707A1 (ja) | 2014-01-24 | 2015-07-30 | Nok株式会社 | シールリング |
JP1581114S (ja) * | 2016-10-21 | 2017-07-10 | ||
DE112018003269T5 (de) * | 2017-06-27 | 2020-03-05 | Nok Corporation | Dichtungsring |
-
2019
- 2019-01-29 WO PCT/JP2019/003000 patent/WO2019155945A1/ja active Application Filing
- 2019-01-29 CN CN201980006041.2A patent/CN111406171B/zh active Active
- 2019-01-29 DE DE112019000742.4T patent/DE112019000742T5/de active Pending
- 2019-01-29 JP JP2019570698A patent/JP6913186B2/ja active Active
- 2019-01-29 KR KR1020207015216A patent/KR102391390B1/ko active IP Right Grant
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2020
- 2020-06-09 US US16/896,316 patent/US11635147B2/en active Active
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH02240457A (ja) * | 1989-03-13 | 1990-09-25 | Sanden Corp | 圧縮機のピストンアセンブリ |
JP2014055645A (ja) * | 2012-09-13 | 2014-03-27 | Nok Corp | シールリング |
CN104930193A (zh) * | 2015-06-04 | 2015-09-23 | 霍凤伟 | 一种密封环 |
Also Published As
Publication number | Publication date |
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KR20200070389A (ko) | 2020-06-17 |
US20200300370A1 (en) | 2020-09-24 |
US11635147B2 (en) | 2023-04-25 |
CN111406171B (zh) | 2022-10-18 |
JPWO2019155945A1 (ja) | 2020-12-17 |
CN111406171A (zh) | 2020-07-10 |
JP6913186B2 (ja) | 2021-08-04 |
KR102391390B1 (ko) | 2022-04-27 |
DE112019000742T5 (de) | 2020-10-15 |
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