CN105697786B - Ultralow temperature sealing ring - Google Patents
Ultralow temperature sealing ring Download PDFInfo
- Publication number
- CN105697786B CN105697786B CN201610244040.XA CN201610244040A CN105697786B CN 105697786 B CN105697786 B CN 105697786B CN 201610244040 A CN201610244040 A CN 201610244040A CN 105697786 B CN105697786 B CN 105697786B
- Authority
- CN
- China
- Prior art keywords
- lip
- elastic part
- metal elastic
- primary seal
- sealing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
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
- F16J15/32—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings
- F16J15/3204—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings with at least one lip
- F16J15/3208—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings with at least one lip provided with tension elements, e.g. elastic rings
- F16J15/3212—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings with at least one lip provided with tension elements, e.g. elastic rings with metal springs
-
- 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
- F16J15/3204—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings with at least one lip
- F16J15/3232—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings with at least one lip having two or more lips
-
- 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
- F16J15/3284—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings characterised by their structure; Selection of materials
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Sealing With Elastic Sealing Lips (AREA)
- Gasket Seals (AREA)
Abstract
The invention discloses a kind of ultralow temperature sealing ring, good sealing can be carried out to mechanical device or equipment in the environment of ultralow temperature, pass through the structure of double arc lips, preferable double sealing effect can be played in stress, the sealing property of sealing ring is improved, above-mentioned ultralow temperature sealing ring includes：Lip circle body and metal elastic part, lip circle body include：Epipharynx and outer lip, annular recess is provided between epipharynx and outer lip, metal elastic part is arranged in annular recess, epipharynx and outer lip are respectively equipped with primary seal lip and time sealing lip away from the side of annular recess, primary seal lip and time sealing lip and epipharynx and outer lip are integrally formed, and primary seal lip is shaped as arc with time sealing lip.
Description
Technical field
The present invention relates to seal field, more particularly to a kind of ultralow temperature sealing ring.
Background technology
Sealing ring is widely used in all trades and professions as a kind of conventional machinery part, primarily serves liquidproof or anti-gas
The effect of leakage.
In ultralow temperature use environment, the molecular permeability of usual cryogenic media is strong more than normal temperature medium, it is easier to reveal,
Therefore the requirement to sealing ring is very high, is sealed more than prior art using spring energy-storage, and the tooth form of its liner V-arrangement spring is rectangle, bullet
Spring shapes and is bent into after annular shape, and external diameter direction slot can natural extension, the meeting nature diminution of inner ring direction slot, external diameter side
Become big to due to slot, the sealing force that chuck is provided also can accordingly be reduced, and because slot becomes big, cycle spring is to chuck
Stretch compensation continuity can accordingly weaken so that sealing effectiveness weaken.
Therefore, with the increasingly complexity of working condition, more harsh conditions, common rubber are it is also proposed to sealing ring
Sealing is influenceed by high temperature or low temperature, than larger, not being suitable for perishable, high temperature or low temperature due to the easy aging of material
Deng complicated occasion, it is therefore necessary to the sealing ring used using a kind of suitable complex working condition.
The content of the invention
The invention provides a kind of ultralow temperature sealing ring, mechanical device or equipment can be entered in the environment of ultralow temperature
The good sealing of row, by the structure of double arc lips, can play preferable double sealing effect in stress, improve sealing ring
Sealing property.
The invention provides a kind of ultralow temperature sealing ring, including：Lip circle body and metal elastic part, lip circle body bag
Include：Epipharynx and outer lip, are provided with annular recess, metal elastic part is arranged in annular recess, interior between epipharynx and outer lip
Lip and outer lip are respectively equipped with primary seal lip and time sealing lip away from the side of annular recess, primary seal lip and secondary sealing lip with it is interior
Lip and outer lip are integrally formed, and primary seal lip is shaped as arc with time sealing lip.
Further, metal elastic part is processed into the V-shaped spring in section by flat wire to be multiple by mould
The elastomeric element for the annular that piece is formed by fixedly connecting, size and the annular recess of metal elastic part match, and annular is recessed
The boss for being used for engaging metal elastic part is provided with the portion of falling into, the closed end of metal elastic part and the bottom of annular recess are pasted
Close, the openend of metal elastic part is fitted with boss.
Further, spring leaf is provided with the multiple external tooths and multiple internal tooths that are stamped to form, and external tooth is shaped as rectangle, interior
Tooth is shaped as V-arrangement, and the opening size of internal tooth is more than the opening size of external tooth.
Further, the groove of cushioning effect has been provided between primary seal lip and secondary sealing lip, the height of primary seal lip is big
In the height of secondary sealing lip.
Further, metal elastic part is made up of stainless steel material.
Further, lip circle body is made up of polytetrafluoroethylmaterial material.
The invention provides a kind of ultralow temperature sealing ring, its advantage is：Can be in the environment of ultralow temperature, to machinery
Device or equipment carry out good sealing, by the structure of double arc lips, and preferable dual-seal effect can be played in stress
Really, improving the different shape of the internal tooth in the sealing property of sealing ring, spring leaf and external tooth can to add when connecting cyclization
The continuity and uniformity loaded by force, the groove between primary seal lip and secondary sealing lip, which can be buffered, to be leaked from primary seal lip
Pressure out, it is to avoid because time sealing lip is directly impacted in the leakage at primary seal lip.
Brief description of the drawings
The sectional view for the ultralow temperature sealing ring that Fig. 1 provides for the present invention；
The scheme of installation for the ultralow temperature sealing ring that Fig. 2 provides for the present invention；
Fig. 3 is the structural representation of spring leaf in the prior art；
Fig. 4 is the structural representation of technology elastomeric element in the prior art；
The structural representation of the spring leaf for the ultralow temperature sealing ring that Fig. 5 provides for the present invention；
The structural representation of the metal elastic part for the ultralow temperature sealing ring that Fig. 6 provides for the present invention；
In figure：1st, lip circle body；2nd, metal elastic part；11st, epipharynx；12nd, outer lip；13rd, annular recess；14th, master is close
Seal lip；15th, secondary sealing lip；21st, spring leaf；131st, boss；211st, external tooth；212nd, internal tooth；3rd, groove.
Embodiment
The present invention is described in further details with specific embodiment below in conjunction with the accompanying drawings：
According to Fig. 1, the invention provides a kind of ultralow temperature sealing ring, including：Lip circle body 1 and metal elastic part 2, lip
Shape circle body 1 includes：Epipharynx 11 and outer lip 12, are provided with annular recess 13 between epipharynx 11 and outer lip 12, metal elastic part 2 is set
It is placed in annular recess 13, epipharynx 11 and outer lip 12 are respectively equipped with primary seal lip 14 and secondary away from the side of annular recess 13
Sealing lip 15, primary seal lip 14 and time sealing lip 15 and epipharynx 11 and outer lip 12 are integrally formed, primary seal lip 14 and time sealing lip
15 are shaped as arc, and the sealing principle of above-mentioned ultralow temperature sealing ring is：Metal elastic part 2 on epipharynx 11 and outer lip 12 to leaning on
The lip wall of the nearly side of annular recess 13 provides elastic force, forces primary seal lip 14 and time sealing lip 15 to be tightly attached to by seal
On surface, so as to block medium formation sealing, pass through said structure, it is possible to achieve in the environment of ultralow temperature, to mechanical device
Or equipment carries out good sealing, by the structure of double arc lips, preferable double sealing effect can be played in stress, is carried
The sealing property of highly dense seal, the environment of ultralow temperature is general under subzero 100 DEG C, it is this under the conditions of medium permeability it is remote
Higher than normal temperature medium, thus the preferable sealing ring of sealing effectiveness is needed, primary seal lip 14 is shaped as arc with time sealing lip 15
It ensure that primary seal lip 14 and secondary sealing lip 15 are all cut in any of circular arc all the time in compression and by seal configuration position
Upwards, it is to avoid because primary seal lip 14 and time sealing lip 15 effectively can not cause seal failure with being contacted by seal.
According to Fig. 2, when system pressure is relatively low, the active force of metal elastic part 2 act on primary seal lip 14 with it is time close
Lip 15 is sealed, 2 pairs of metal elastic part is now relied only on and is sealed by seal, and when system pressure is gradually stepped up, medium
Understand and enter annular recess 13 under the effect of the pressure, the active force collective effect of pressure medium and metal elastic part 2 is in master
Sealing lip 14 and time sealing lip 15, now sealing ring is common to being sealed by seal by medium and metal elastic part 2,
As shown in Fig. 2 medium can enter in annular recess 13 from the passage in the left side of sealing ring.
It is preferred that, metal elastic part 2 is processed into the V-shaped spring leaf in section by flat wire to be multiple by mould
The elastomeric element of 21 annulars being formed by fixedly connecting, size and the annular recess 13 of metal elastic part 2 match, annular
The boss 131 for being used for engaging metal elastic part 2, the closed end and ring-shaped depression of metal elastic part 2 are provided with depressed part 13
The bottom laminating in portion 13, the openend of metal elastic part 2 is fitted with boss 131, and spring leaf 21 is more provided with what is be stamped to form
Individual external tooth 211 and multiple internal tooths 212, external tooth 211 is shaped as rectangle, and internal tooth 212 is shaped as V-arrangement, the open-mouth ruler of internal tooth 212
The very little opening size more than external tooth 211.
Compared with prior art, the molding mode and existing skill of the spring leaf 21 in the ultralow temperature sealing ring that the present invention is provided
Art is just the same, is simply rushing the difference in shape of tooth, in the prior art, internal tooth 212 and external tooth 211 on spring leaf 21
Shape be rectangle, and size is consistent, and concrete structure can be found in Fig. 3, using this structure spring leaf 21 when, spring
Piece 21 is molded and bending is in turn connected into after annular shape by welding manner again, and external diameter direction slot can natural extension, internal diameter
Direction slot meeting nature reduces, and external diameter direction becomes big due to slot, the active force provided primary seal lip 14 and secondary sealing lip 15
Also can accordingly it reduce, and because slot becomes big so that metal elastic part 2 is continuous to the stretch compensation of epipharynx 11 and outer lip 12
Property can accordingly weaken so that sealing effectiveness weakens, and internal diameter direction slot can not infinitely reduce, and can cause overlapping or overlap joint, from
And sealing effectiveness is influenceed, concrete structure can be found in Fig. 4, and the structure of spring leaf 21 in the ultralow temperature sealing ring that the present invention is provided is
Internal tooth 212 is different with the shape of external tooth 211, and internal tooth 212 is shaped as V-arrangement, external tooth 211 is shaped as rectangle, and internal tooth 212 is opened
Mouth size is greater than the opening size of external tooth 211, and the opening size of external tooth 211 is also less than spring leaf 21 of the prior art
The opening size of external tooth 211, concrete structure may refer to Fig. 5, using this structure spring leaf 21 when, spring leaf 21 is molded simultaneously
And bending is in turn connected into after annular shape by welding manner again, the slot formed after the slot natural extension of external diameter direction compared to
External diameter direction of the prior art slot can be smaller, and internal diameter direction slot will not be overlapped or taken due to using v-shaped structure
Connect, so that the continuity of proof load is higher than the metal elastic part 2 of prior art with uniformity, concrete structure may refer to
Fig. 6.
It is preferred that, the groove 3 of cushioning effect, the height of primary seal lip 14 have been provided between primary seal lip 14 and secondary sealing lip 15
Degree is more than the height of time sealing lip 15, and the height of primary seal lip 14 is higher than time sealing lip 15, it is ensured that primary seal lip 14 and time sealing
Lip 15 by seal with that can be brought into close contact, it is to avoid be influenced each other because of the reason for height is different, primary seal lip 14 and time sealing
The groove 3 being provided between lip 15 can buffer the pressure that may be leaked out from primary seal lip 14, it is to avoid at primary seal lip 14
Leakage directly impact time sealing lip 15, because metal elastic part 2 directly acts on primary seal lip 14 and time sealing lip 15
Position, and because primary seal lip 14 and time difference of the height of sealing lip 15 cause primary seal lip 14 to compare the secondary arc of sealing lip 15 more
Greatly, primary seal lip 14 and time sealing lip 15 are caused because of metal elastic part 2 and pressure medium collective effect so as to alleviate
Deformation.
It is preferred that, metal elastic part 2 is made up of stainless steel material, and stainless steel material corrosion resistance preferably, and can be protected
Consistency and elasticity requirement is demonstrate,proved, the stainless steel material of the models such as SS301 or 718 can be selected.
It is preferred that, lip circle body 1 is made up of polytetrafluoroethylmaterial material, polytetrafluoroethylmaterial material have it is good wear-resistant and
Heat resistance, relatively low gas permeability, and low-temperature characteristics preferably, are highly suitable for the sealing of ultra-low temperature surroundings, certain above-mentioned lip
The material of shape circle body 1 can also also be had from other high molecular polymers such as polytrifluorochloroethylene or ultra high molecular polyethylenes
There is identical characteristic.
In summary, the invention provides a kind of ultralow temperature sealing ring, it is advantageous that：Can in the environment of ultralow temperature,
Good sealing is carried out to mechanical device or equipment, by the structure of double arc lips, can play preferably dual in stress
Sealing effectiveness, improving the different shape of the internal tooth in the sealing property of sealing ring, spring leaf and external tooth can connecting into
Strengthen the continuity and uniformity of load during ring, the groove between primary seal lip and secondary sealing lip can be buffered may be from primary seal
The pressure that lip is leaked out, it is to avoid because time sealing lip is directly impacted in the leakage at primary seal lip, metal elastic part is by stainless steel
Material is made can be with anticorrosion, and lip circle body can strengthen sealing effectiveness using polytetrafluoroethylmaterial material, be highly suitable for surpassing
Low temperature environment, the present invention is simple in construction, is designed by the spring of double containment lip and special construction, drastically increases sealing ring
Sealing effectiveness, is a practicality and the stronger ultralow temperature sealing ring of feature.
Described above, only presently preferred embodiments of the present invention is not intended to limit the invention, every skill according to the present invention
Any trickle amendment, equivalent substitution and improvement that art is substantially made to above example, should be included in technical solution of the present invention
Protection domain within.
Claims (4)
1. a kind of ultralow temperature sealing ring, it is characterised in that including：Lip circle body and metal elastic part, the lip circle body bag
Include：Epipharynx and outer lip, are provided with annular recess between the epipharynx and the outer lip, the metal elastic part is arranged at described
In annular recess, the epipharynx and the outer lip are respectively equipped with primary seal lip and secondary close away from the side of the annular recess
Envelope lip, the primary seal lip and described sealing lip and the epipharynx and the outer lip are integrally formed, the primary seal lip and institute
That states time sealing lip is shaped as arc；The metal elastic part is processed into section by mould by flat wire and is in be multiple
The elastomeric element for the annular that the spring leaf of V-arrangement is formed by fixedly connecting, the size of the metal elastic part and the annular are recessed
Sunken portion matches, and the boss for being used for engaging the metal elastic part, the metallic elastic portion are provided with the annular recess
The closed end of part is fitted with the bottom of the annular recess, and the openend of the metal elastic part is fitted with the boss；
The spring leaf is provided with the multiple external tooths and multiple internal tooths that are stamped to form, and the external tooth is shaped as rectangle, the internal tooth
V-arrangement is shaped as, the opening size of the internal tooth is more than the opening size of the external tooth.
2. ultralow temperature sealing ring according to claim 1, it is characterised in that the primary seal lip and described sealing lip it
Between be provided with the groove of cushioning effect, the height of the primary seal lip is more than the height of described sealing lip.
3. ultralow temperature sealing ring according to claim 1, it is characterised in that the metal elastic part is by stainless steel material
It is made.
4. ultralow temperature sealing ring according to claim 1, it is characterised in that the lip circle body is by polytetrafluoroethylmaterial material
It is made.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610244040.XA CN105697786B (en) | 2016-04-18 | 2016-04-18 | Ultralow temperature sealing ring |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610244040.XA CN105697786B (en) | 2016-04-18 | 2016-04-18 | Ultralow temperature sealing ring |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105697786A CN105697786A (en) | 2016-06-22 |
| CN105697786B true CN105697786B (en) | 2017-09-22 |
Family
ID=56217161
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610244040.XA Expired - Fee Related CN105697786B (en) | 2016-04-18 | 2016-04-18 | Ultralow temperature sealing ring |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105697786B (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110762218B (en) * | 2018-07-26 | 2024-04-12 | 舍弗勒技术股份两合公司 | Sealing ring |
| CN110594411A (en) * | 2019-08-12 | 2019-12-20 | 中国石油化工股份有限公司 | Sealing method for pressure-resistant container |
| CN110748645B (en) * | 2019-10-28 | 2022-02-22 | 西安近代化学研究所 | Sealing device suitable for corrosive liquid |
| CN110848387B (en) * | 2019-11-22 | 2022-07-05 | 江门市鑫辉特种密封科技有限公司 | Sealing mechanism for high-speed wire rolling mill |
| CN114017561B (en) * | 2021-11-18 | 2023-06-27 | 西安航天动力研究所 | Sealing structure suitable for aerospace engine pipeline |
| WO2023130419A1 (en) * | 2022-01-10 | 2023-07-13 | 舍弗勒技术股份两合公司 | Seal ring and harmonic reducer |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2594164A (en) * | 1946-11-29 | 1952-04-22 | Melvin E Lorentz | Expander device |
| FR2247934A5 (en) * | 1973-10-16 | 1975-05-09 | Pirep Sa | Expansion spring for lip seals - is strip with partial transverse cuts imparting flexibility formed into a ring |
| CN101184940A (en) * | 2005-05-27 | 2008-05-21 | Nok株式会社 | Lip type seal |
| CN203717926U (en) * | 2014-02-26 | 2014-07-16 | 北京裕泰行新材料科技有限公司 | Sealing assembly |
| CN203880095U (en) * | 2014-05-27 | 2014-10-15 | 北京裕泰行新材料科技有限公司 | Pressure resisting type U-shaped spring energy accumulation lip-shaped sealing ring |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3837631A (en) * | 1972-05-08 | 1974-09-24 | Aeroquip Corp | Spring for composite sealing ring and method of manufacture |
-
2016
- 2016-04-18 CN CN201610244040.XA patent/CN105697786B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2594164A (en) * | 1946-11-29 | 1952-04-22 | Melvin E Lorentz | Expander device |
| FR2247934A5 (en) * | 1973-10-16 | 1975-05-09 | Pirep Sa | Expansion spring for lip seals - is strip with partial transverse cuts imparting flexibility formed into a ring |
| CN101184940A (en) * | 2005-05-27 | 2008-05-21 | Nok株式会社 | Lip type seal |
| CN203717926U (en) * | 2014-02-26 | 2014-07-16 | 北京裕泰行新材料科技有限公司 | Sealing assembly |
| CN203880095U (en) * | 2014-05-27 | 2014-10-15 | 北京裕泰行新材料科技有限公司 | Pressure resisting type U-shaped spring energy accumulation lip-shaped sealing ring |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105697786A (en) | 2016-06-22 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105697786B (en) | Ultralow temperature sealing ring | |
| CN102182910A (en) | Gas cylinder with fully-wound plastic liner and molding technology thereof | |
| US8746286B2 (en) | Hydraulic accumulator | |
| CN202024074U (en) | Gas bottle with plastic internal container being fully wrapped | |
| CN204879013U (en) | Low temperature pneumatic ball valve packing structure | |
| CN212107014U (en) | High leakproofness ball valve is sealed | |
| CN208674182U (en) | Battery cover board assembly, single battery, battery modules and electric car | |
| CN204788078U (en) | Hot seal structure of radome fairing end cap | |
| CN106122339B (en) | The sealing device that a kind of air-spring bellows are connected with cover plate | |
| CN201277328Y (en) | High-pressure oil seal | |
| CN110185918B (en) | High-pressure composite container | |
| CN204339739U (en) | A kind of Novel escape hammer | |
| CN205715428U (en) | A kind of double oil seal guider assembly and the high-pressure type amortisseur of composition thereof | |
| CN205991169U (en) | A kind of gasket seal | |
| CN114110293A (en) | Self-balancing type sealing plug and sealing system | |
| CN105546173A (en) | Structure of a blast valve for a container | |
| CN205315692U (en) | Diaphragm type pressure water storage equipment seal structure | |
| CN210240600U (en) | Helium-level elastic double-sealing stop valve clack structure | |
| CN201474921U (en) | Packing seal structure of compressor | |
| CN208417603U (en) | The ball arm integrated Fluorine-lined ball valve that the anti-side of valve rod is split | |
| CN207074676U (en) | A kind of electrokinetic cell | |
| CN101949460B (en) | Diaphragm valve | |
| CN100540415C (en) | The bulk powder tank truck self-sealing manhole cover | |
| CN219510082U (en) | Shock-absorbing rubber gasket | |
| CN110486554B (en) | High-strength sealed oil filling pipe assembly |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20210330 Address after: 102200 No.6, xidaqiao South Road, Nankou Town, Changping District, Beijing Patentee after: Beijing yutaihang Machinery Technology Co.,Ltd. Address before: Room 102, building 2, 27 Qinghe Longgang Road, Haidian District, Beijing Patentee before: BEIJING YUTAIXING NEW MATERIAL TECHNOLOGY Co.,Ltd. |
|
| TR01 | Transfer of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170922 Termination date: 20210418 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |