• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The present invention provides a flexible tube for an exhaust pipe of a motor vehicle. The bellows element (10) thereof has projecting portions (12), a central portion (C) and two end portions (U) so that the projecting portions (12) have an outer diameter uniform. The central portion (C) has a maximum inside diameter (D3) which is larger than a minimum inside diameter (D1) of the two end portions (U), and an outer cover member is formed at from an outer thread of a net structure, where a hollow inner diameter in the center of a bellows is larger than an inner diameter of valleys at both ends so that a space from a interlocking element increases to prevent interference between the bellows and the interlocking element. The invention is applicable in particular in the field of automotive construction.
    公开号:FR3016656A1
    申请号:FR1461578
    申请日:2014-11-27
    公开日:2015-07-24
    发明作者:Kyeong Jung Kim
    申请人:SJM Co Ltd；
    IPC主号:
    专利说明:

    [0001] The present invention relates to a flexible tube for an exhaust pipe of a motor vehicle, wherein an inner diameter of recesses in the center of a bellows is made to be larger than an inner diameter of recesses to two ends thereof so that a gap of an interlocking member increases to prevent interference between the bellows and the interlocking member, thereby reducing rolling noise due to 10 to vibration and noise, and the recess portions of the two end portions are formed to be small so as to flexibly absorb the external force and displacement applied to the bellows, thereby enhancing flexibility and durability bellows. In general, an exhaust pipe is connected to the engine of a motor vehicle so as to exhaust the exhaust, where a flexible coupling is made to the connecting portion thereof so that the flexible coupling absorbs external forces generated by engine vibration and road surface vibrations to extend the life of the exhaust pipe and improve comfort during travel. The flexible coupling which is connected to the exhaust pipe of a motor vehicle as set forth above generally absorbs the tension, compression and flexural displacement which are produced in response to the movement of an exhaust system by the motor vibrations and the road surface vibrations, where a twisting movement produced in any direction can follow in accordance with the engine mounting conditions, the direction in which the displacement takes place and the design and the shape of the assembly 35 of the exhaust pipe. Therefore, a bellows made of a metallic material is mainly used to improve the performance relating to the maintenance of airtightness and to absorb vibrations and displacement, which are the main functions of a coupling. flexible for an exhaust pipe of a motor vehicle. In addition, the flexible coupling is provided with an interlocking element, as disclosed in EP 041089 A1, in which the interlocking element simultaneously absorbs deformation, such as inward compression. flexing or the like of a bellows element which is made of a metallic material in the form of a cylinder with repetitive corrugations or grooves, controls the displacement in the range of the elastic limit of the bellows element makes the flow of the exhaust gas smooth or uniform like a guide tube and protects the bellows element against a high temperature exhaust gas. In addition, the bellows element is made of a structure where the outer side portion of the bellows member is surrounded by a braided member and in this situation the two ends of the bellows member and the braided member are compressed together with a braided member. and caps in the circumferential direction to be finished by spot welding. That is, one end is coupled to one engine side, and the other end is coupled to an exhaust pipe side so that the exhaust passes through a central portion and bellows element 30 and the interlocking element absorb shocks, deformation or the like, which act between the motor and the exhaust pipe, by contraction and expansion. The bellows elements whose use is currently widely used have the disadvantage that the bellows element can not serve as a sufficient means to restrain the tension, compression and flexion displacement or deflection caused by the vibrations of the bellows. a motor or the vibrations of an exhaust system from the road surface during driving, since the outer diameter and the inner diameter of the bellows element are uniformly made so that the height all the projections are uniform or the height simply of a first recessed portion is lowered. Therefore, in the flexible coupling, the Korean Utility Model, Registration Number 184089 discloses a flexible coupling for a motor vehicle exhaust pipe as a means for extending the life of a bellows and for transmitting and to disperse the vibrations of an engine as well as the vibrations and the stress produced during the driving. In accordance with this flexible coupling for a motor vehicle exhaust pipe, as shown in FIG. 6, the heights H1-H4 of the projections progressively increase from a first projection to an end portion side 11 of an element of bellows 10 to the other side, and the inside diameter of the recessed portion is made to gradually decrease from a first recessed portion to the other side at a uniform angle so that the flexible coupling absorbs the displacement relative to the axial direction or the bending direction of the braided member 10 and is then reestablished when the external force is removed. In addition, the minimum inside diameter Dr of the recessed portion of the bellows element 10 is made to be equal to or greater than the inside diameter Dt of the end portions 11. However, the bellows element as described herein above, has the disadvantage that the manufacturing costs increase and that the manufacturing work thereof is complicated since the bellows element is made of a metallic material with recurrent protrusions and recesses, wherein the height of the projections gradually increases towards a central portion in the inward direction so that the inner diameter of the depressions gradually decreases. In addition, the minimum inner diameter of the central portion of the bellows element is smaller than the diameter of the two end portions thereof so that the flow of the exhaust gas remains in the central portion of the bellows element. the moment of the discharge of the exhaust gases, thereby degrading or deteriorating the performance of the engine. In particular, sufficient space is provided between the interlocking element and the bellows element so as to prevent damage to the bellows element as a result of mutual interference in vibration or noise generation. resulting from mutual interference. However, the formation of such a sufficient space results in a decrease in the height of the projections of the bellows element so that durability of the bellows element decreases or noise can be produced. That is, vibrations applied to the flexible tube in the exhaust system of a motor vehicle are as serious or important in the central portion as in the two end portions. Therefore, sufficient space is provided between the interlocking member and the bellows member. However, the bellows element as described above has a central portion whose inner diameter is the same as that of the conventional bellows element. As a result, the central portion, to which large vibrations are applied, can not prevent interference between the interlocking element and the bellows element with respect to vibrations or the like. Reference can be made to the prior art document: Patent Document 1: Korean Utility Model Registration Number 184089 entitled: "Flexible Coupling for Automobile Exhaust Pipe", registered March 20, 2000.
    [0002] The present invention has been made to solve the above-mentioned problems of the prior art, and an object of the present invention is to provide a flexible tube for an exhaust pipe of a motor vehicle, where the diameter hollow interior of a central portion in a bellows element, to which the vibrations are strong, is made to be larger than an internal hollow diameter of the two end portions to which the vibrations are relatively small, so that sufficient space is maintained between the bellows element and an interlocking element so as to improve the durability of the bellows element. Another object of the present invention is to provide a flexible tube for an exhaust pipe of a motor vehicle, wherein a reinforcing section is further provided in the central portion of a bellows element in the direction axial so as to further absorb the external force and displacement to which the bellows is subjected, thereby improving the flexibility and durability of the bellows element. Yet another object of the present invention is to provide a flexible tube for an exhaust pipe of a motor vehicle, wherein the recessed portions of the central portion of the bellows element are larger than the portions recess of the two end portions to reduce the costs of the bellows member material and to improve productivity while reducing vibrations at the central portion to improve vibration properties, thereby improving the marketing and the reliability of the bellows element.
    [0003] According to the present invention, the objectives set out above are achieved by a flexible tube for an exhaust pipe of a motor vehicle, which comprises: a bellows element 10 made of a metallic material in the form of a cylinder hollow having corrugations or grooves which are repeated in a wavy form; an interlocking member 20 positioned in the bellows member 10 with a predetermined gap of the bellows member 10 and having a spiral groove spirally formed on the interlocking member 20 so as to absorb deformation; an outer member 30 surrounding the outside of the bellows member 10; cap members 40 for coupling the outer cover member 30 such that the outer cover member 30 is attached to the outer portions of both ends of the bellows member 10; and intermediate members 50 in the form of a ring, one end of which is attached to the bellows member 10 and the other end of which is attached to the interlocking member 20 by an overlap of the interlocking member 20 inwardly, wherein the bellows element 10 has projecting portions 12, a central portion C and the two end portions U such that the projecting portions 12 have a projection uniform outer diameter, and the central portion C has a maximum inside diameter of hollow D3 which is larger than a minimum inner diameter D1 of the two end portions U, and the outer covering member 30 is formed by an outer net with a network structure.
    [0004] In addition, the bellows element 10 has a hollow interior diameter D2 which is formed such that the recessed portions 13 progressively increase from the minimum hollow interior diameter D1 of the two end portions U to the central portion C in the outward direction, and a maximum hollow interior diameter D3 which is uniformly formed in the center. Further, the central portion C of the bellows element 10 further comprises a reinforcement section S which is made with low protruding portions 12a and elevated recess portions 13a, the height of each of which is greater small as the protruding portions 12 and recessed portions 13 which are uniformly repeated. In addition, the minimum hollow interior diameter D1 of the two end portions U of the bellows element 10 progressively increases at a uniform angle to the maximum hollow interior diameter D3 of the central portion C so that the inside diameter of the central portion C is made to be large, and the reinforcing sections S are in the form of a ring, with the low protruding portions 12a and the high recessed portions 13a, the height of each of them 25 being smaller than the projecting portions 12 and the recessed portions 13 which are uniformly repeated in the central portion C. A gap which is formed between the interlocking member 20 and the bellows member 10 further has a wire mesh 60 so as to prevent or prevent contact between the interlocking member 20 and the bellows element 10. In addition, the outer cover member 30 Ormed by the outer thread is further surrounded by a braided member 80 on the outside thereof. According to the invention as realized above, the maximum hollow inner diameter of a central portion in a bellows element, to which the vibrations produced are strong, is designed to be larger than the minimum hollow inner diameter. of the two end portions, at which the vibrations are lower than in the central portion, so that sufficient space is maintained between the bellows element and an interlocking element, and there is no interference between the bellows member and the interlocking member despite vibrations or the like thereby extending the life of the bellows member. Furthermore, in order to prevent interference between the bellows element and the interlocking element, the diameter of the recessed portion of the central portion 15 is designed to be large while the diameter of the of the two end portions, at which the vibrations are relatively small, is designed to be small, so that the height of the projections of the two end portions can be increased so as to improve flexibility while dispersing the External force and displacement applied to the bellows element thereby improving the durability of the bellows element. On the other hand, the inner diameter of the hollow of the central portion of the bellows element is higher or higher than the inner diameter of the hollow of the two end portions so that the flow of the exhaust gas can be regular. or uniform, the costs of the bellows element material can be reduced, and the productivity can be increased, thus improving the marketing and reliability of the bellows element. In addition, a space which is formed between the interlocking element and the bellows element is provided with a wire mesh so as to absorb the impact produced by the vibrations which are produced during driving and for avoid noise generation.
    [0005] The invention will be better understood, and other objects, features, details and advantages thereof will appear more clearly in the explanatory description which follows with reference to the accompanying drawings given solely by way of example illustrating several embodiments. of the invention and in which: - Figure 1 is a half sectional view showing the basic structure of a flexible tube for an exhaust pipe of a motor vehicle according to an embodiment of the invention. present invention; Fig. 2 is an enlarged sectional view showing the structure of a bellows element according to the present invention; Figures 3 to 5 are enlarged sectional views showing flexible tubes for an exhaust pipe of a motor vehicle in accordance with other embodiments of the present invention; Figure 6 is a half-sectional view showing the structure of a bellows element of the prior art; Figures 7 to 10 are half sectional views showing flexible tubes for an exhaust pipe of a motor vehicle in accordance with other embodiments of the present invention; FIG. 11 is an enlarged sectional view of portion 'A' of FIG. 7; FIG. 12 is an enlarged sectional view of portion 'B' of FIG. Fig. 13 is a sectional view showing a flexible tube for an exhaust pipe of a motor vehicle in accordance with other embodiments of the present invention. The present invention will now be described in more detail with reference to the drawings. However, the present invention should not be construed as being limited thereto. In a flexible tube for an exhaust pipe of a motor vehicle according to the present invention, as shown in the accompanying drawings, the inner diameter of the hollow of the central portion of a bellows element is made to be larger. the inside diameter of the recess of the two end portions so as to increase a gap of an interlocking member so that interference between the bellows member and the interlocking member can be avoided . The recessed portions of the two end portions are designed to be small to flexibly absorb the external forces and displacement applied to the bellows member so that the flexibility and durability of the bellows member can to be improved. First, a flexible tube 1 for an exhaust pipe according to the present invention comprises a bellows element 10 made in the form of a hollow cylinder and having corrugations or grooves which are repeated in a corrugated form, an interlocking member 20 positioned in the bellows member 10 at a predetermined space of the bellows member 10, an outer cover member 30 for surrounding the portion at the outer side of the bellows member 10, cap members 40 for securing the outer cover member 30 to the outer portions of both ends of the bellows member 10 as well as intermediate members 50 having one end attached to the bellows member 10 and the other end attached to the interlocking member 20 by overlapping the interlocking member 20 inward, where it is important to maintain a sufficient space of the interlocking element 20 by making the maximum hollow inside diameter D3 of the central portion C to be larger than the minimum hollow interior diameter D1 of the two end portions U. At this time, it is important that the bellows element 10 is made such that the maximum hollow interior diameter D3 of the central portion C is enlarged to be larger than the minimum hollow interior diameter D1 of the two portions of end U so as to maintain a sufficient space relative to the interlocking element 20.
    [0006] For this purpose, referring to FIG. 2 which shows the approximate directions used in the description, the bellows element 10 is made from a metal in the form of a tube or tubing, the bellows element 10 is provided with corrugations which are repeated in undulating form by projecting portions 12 and recessed portions 13 which are formed in a continuous lengthwise manner. As a result, when a displacement takes place in the axial direction or in the direction of bending due to vibrations or shocks, the projecting portions 12 and the recessed portions 13 which are formed in a continuous manner in the direction lengths are used to absorb the displacement by being elastically bent or bent, in order to prevent escape of the exhaust gases, to absorb the expansion and bending. The projecting portions 12 and the recessed portions 13 are restored or reset after the displacement has been absorbed and the external force has been removed. Further, the interlocking member 20 is positioned in the bellows member 10 while maintaining a predetermined gap with respect to the bellows member 10. The interlocking member 20 has a groove therein. spiral which is spirally formed through the entire interlocking member 20 such that a damping effect is produced by the friction in the spiral groove at the time of axial or axial displacement. bending is produced, where the spiral groove essentially absorbs the deformation in the longitudinal direction and uniformly retains the space of a path through which the exhaust passes, thereby serving to restrict or to limit the generation of turbulence. The outer cover member 30 surrounds the outer side of the bellows member 10, where an outer thread which is braided with a thin wire according to a net structure is selected for the outer cover member 30. the bellows element 10 can be flexibly deformed with a large displacement even relative to the displacement and the tension in the compression direction. The outer cover member 30 and the two end portions of the exterior of the bellows member 10 are coupled to the cap members 40 such that the cap members 40 are attached to the bellows member 10. In the meantime, the bellows element 10 and the interlocking element 20 are connected to each other by the intermediate element 50 which is in the form of a ring.
    [0007] That is, in the state where the front ends of the intermediate members 50 are in accordance with the end portions of the bellows member 10 and the horizontal portions of the bellows member 10, the outer cover member 30 and the cap members 40 overlap each other, the end ends of the intermediate members 50 are attached to the bellows member 10 by clamping means which has a fastening function in the circumferential direction or by performing spot welding at several points thereof. Further, the other ends of the intermediate members 50 are partially overlapped by the interlocking member 20 in the state where the other ends of the intermediate members 50 are folded inwardly of the interlocking member. 20, and then spot welding is performed at a plurality of points such that the bellows member 10 and the interlocking member 20 are held in a fully coupled state. At this time, the bellows element 10 according to the present invention, as shown in FIG. 2, has a uniform outer diameter of the projecting portions 12, and the maximum hollow interior diameter D3 of the central portion C is made to be larger than the minimum hollow interior diameter Dl of the two end portions U.
    [0008] That is, the bellows element 10 has the maximum hollow interior diameter D3 of the central portion C which is made to be larger than the minimum hollow inside diameter of the two end portions U, and the protruding portions 12 which are formed in a lengthwise continuous manner with the same height, in the state that the minimum hollow interior diameter D1 of the two end portions U is formed to be equal to or larger than the inside diameter Dt of the end portions 11.
    [0009] Therefore, the bellows element 10 is able to maintain the same space as the conventional space between the interlocking element 20 which is positioned in the bellows element 10 and the two end portions U and a space greater than the conventional space between the interlocking element 20 and the central portion C. If the displacement in the axial direction or the bending direction is produced on the bellows element 10 and the element d As a result of vibration or shock, the displacement is produced more significantly in the central portion C of the bellows element 10 rather than in the two end portions U. However, the portion Central C in accordance with the present invention retains sufficient space so that damage to the bellows member 10 by the interlocking member 20 can be prevented. On the other hand, a minimum space is kept from the interlocking element 20 to the two end portions U of the bellows element 10 at which the vibrations are not important. As a result, the height of the projections of the two end portions U can be raised, thereby improving the flexibility and durability of the bellows element. In addition, the bellows element 10 in accordance with another embodiment, as shown in FIG. 3, has a hollow inside diameter D2 which progressively increases the minimum hollow interior diameter D1 of the two end portions U to the central portion C, and a uniform maximum internal diameter D3 in the center.
    [0010] As described above, by performing a predetermined inclination from the two end portions U of the bellows member 10 to the central portion C, the bellows member 10 can be guided at an inclination relative to the flexion displacement. so that the stress concentration produced by a sudden change in shape can be avoided and a smooth or smooth movement can be ensured. In general, 5-25 ° is generally used as the inclination of inclined recessed portions 13, and the number of inclined recessed portions is preferably set to 1 to 3. In addition, as shown in FIG. 4, the central portion C of the bellows element 10 in accordance with another embodiment of the present invention further comprises reinforcing sections S which are formed with low protruding portions 12a and elevated recesses. 13a, the height of each of which is lower than the protruding portions 12 and recessed portions 13 which repeat in a uniform manner.
    [0011] Furthermore, as shown in FIG. 5, the inside diameter of the recessed portions 13 of the two end portions U of the bellows portion 10 progressively increases at a uniform angle towards the inside diameter of the recessed portions 13 of the central portion. C so that the inner diameter of the central portion C is made to be large, and the central portion C further comprises the reinforcing sections S which are in the form of a ring and have the low protruding portions 12a and the high recessed portions 13a, each of which is lower than the protruding portions 12 and recessed portions 13 which are uniformly repeated over the central portion C. The reinforcement sections S have advantages, where 2 - 5 protrusions of the central portion C of the bellows element 10 can be reduced, thus reducing the material consumption so as to reduce the cost s of manufacturing. Furthermore, as shown in Fig. 8 and Fig. 10, it is possible to further realize a wire mesh 60 at the gap which is formed between the interlocking member 20 and the bellows member 10 to prevent contact between the interlocking member 20 and the bellows member 10. The wire mesh 60 is an elastic material which is constructed as a tube by compressing a net structure which is braided with a thin wire, and the wire mesh 60 is spatially adjusted to resiliently absorb shocks resulting from vibration of the engine or road surface during driving as well as bending motion or the like . In addition, the wire mesh 60 is able to prevent mutual contact between the bellows element and the interlocking element by vibration during driving, thereby eliminating the sources of noise generation. Further, an elastic member 70 may be mounted on the outside of the outer cover member 30 as shown in Fig. 9 and Fig. 10. The resilient member 70 is a spring member which is made substantially in the form of a ring for surrounding the bellows member 10 and the outer cover member 30, wherein the resilient member 70 is formed as a corrugation so as to be curved and to obtain a voltage. The elastic member 70 produces a fastening force to the bellows element 10.
    [0012] At this time, the radial diameter of the corrugations decreases in the approximately median portion of the bellows member 10 so as to form a fixing groove 17, and the elastic member 70 is received in the fixing groove 17 and can not get away from it. In the meantime, it is preferable to mount another braided member 80 on the outside of the outer outer cover member.
    [0013] The braided member 30 which is made by a net 80 is braided with a thin wire and further surrounds the outside of the cover member 30 for the flexible deformation due to the large displacement relative to the displacement and the tension in the compression direction.
    [0014] The braided member 80 is coupled to the cap members 40 at both outer end portions thereof as an outer cover member 30 and is substantially secured to the bellows member 10 by clamping, FIG. Having described our invention in connection with the present embodiments, it should be understood that the invention is not limited by any of the embodiments and drawings of the description, and is obvious to the man of the present invention. It will be appreciated that various changes and modifications can be made to the present invention without departing from the spirit and scope of the invention. Brief explanation of the reference signs: 101 - flexible tube for exhaust manifold 10 - bellows element 12 - protruding portions 12a - low protruding portions 13 - recessed portions 13a - raised protruding portions 20 interlocking element Outer covering element 40 cap element 50 intermediate element 60 - wire mesh 70 - elastic element 80 - braided element C: central portion U: two end portions S: reinforcing section D1 - minimum internal diameter of hollow D3 - diameter internal maximum
    权利要求:
    Claims (6)
    [0001]
    REVENDICATIONS1. Flexible tube for an exhaust pipe of a motor vehicle, characterized in that it comprises: a bellows element (10) made of a metallic material in the form of a hollow cylinder having corrugations which are repeated under a wavy form; an interlocking member (20) positioned in the bellows member (10) at a predetermined space of said bellows member (10) and having a spiral groove spirally formed on the interlocking member (20) to absorb deformation; an outer member (30) surrounding the exterior of the bellows member (10); cap members (40) for coupling the outer cover member (30) such that the outer cover member (30) is attached to the outer portions of both ends of the bellows member (10); ); and intermediate members (50) in the form of a ring, one end of which is attached to the bellows member (10) and the other end of which is attached to the interlocking member (20). by overlapping the interlocking member (20) inwardly, in that the bellows member (10) has projecting portions (12), a central portion (C) and two portions of end (U) so that the protruding portions (12) have a uniform outside diameter, in that the central portion (C) has a maximum inside diameter (D3) which is larger than an inside diameter of the minimum hollow space (D1) of the two end portions (U), and in that the outer covering element (30) is made from an outer net of a network structure.
    [0002]
    Flexible tube for an exhaust pipe of a motor vehicle according to claim 1, characterized in that the bellows element (10) has a hollow inside diameter (D2) which is designed in such a way that the portions indentation (13) progressively increase from the minimum hollow inside diameter (D1) of the two end portions (U) to the central portion C) in the outward direction, and a maximum inside diameter of the recesses (D3) which is performed in a uniform way in the center.
    [0003]
    Flexible tube for an exhaust pipe of a motor vehicle according to claim 1, characterized in that the central portion (C) of the bellows element (10) further comprises reinforcing sections (S) provided with low protruding portions (12a) and raised recesses (13a), each of which is smaller in height than the protruding portions (12) and recessed portions (13) which are uniformly repeated.
    [0004]
    Flexible tube for an exhaust pipe of a motor vehicle according to claim 3, characterized in that the minimum hollow inside diameter (D1) of the two end portions (U) of the bellows element (10) ) gradually increases at a uniform angle to the maximum hollow inner diameter (D3) of the central portion (C) so that the inner diameter of the central portion (C) is made large; and in that the reinforcing sections (S) are in the form of a ring with the low protruding portions (12a) and the high recessed portions (13a), the height of each being smaller than that of the portions protrusion (12) and recessed portions (13) which are uniformly repeated in the central portion (C).
    [0005]
    A flexible tube for an exhaust pipe of a motor vehicle according to claim 1, characterized in that a space formed between the interlocking element (20) and the bellows element (10) is further provided with a wire mesh (60) to prevent contact between the interlocking member (20) and the bellows member (10).
    [0006]
    Flexible tube for an exhaust pipe of a motor vehicle according to claim 1, characterized in that the outer covering element (30) formed by the outer thread is further surrounded by a braided element (80). on the outside of it.
    类似技术:
    公开号 | 公开日 | 专利标题
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    FR2699123A1|1994-06-17|Vibration damper for motor vehicles.
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    FR2835018A1|2003-07-25|IMPROVEMENT TO A DECOUPLING HOSE FOR AN EXHAUST LINE OF A MOTOR VEHICLE ENGINE
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    FR2670861A1|1992-06-26|ELASTIC TIGHTENING COLLAR.
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    FR2550593A1|1985-02-15|DRIVE PLATE FOR A FRICTION CLUTCH OF A MOTOR VEHICLE
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    同族专利:
    公开号 | 公开日
    CN104791059A|2015-07-22|
    JP6078033B2|2017-02-08|
    BR102015001294A2|2016-12-20|
    KR101570921B1|2015-11-20|
    US20150204470A1|2015-07-23|
    JP2015137646A|2015-07-30|
    US9631751B2|2017-04-25|
    DE102014221519B4|2018-08-16|
    CN104791059B|2017-08-11|
    DE102014221519A1|2015-07-23|
    KR20150087720A|2015-07-30|
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    法律状态:
    2015-11-27| PLFP| Fee payment|Year of fee payment: 2 |
    2016-11-15| PLFP| Fee payment|Year of fee payment: 3 |
    2017-11-28| PLFP| Fee payment|Year of fee payment: 4 |
    2018-02-23| PLSC| Search report ready|Effective date: 20180223 |
    2018-11-26| PLFP| Fee payment|Year of fee payment: 5 |
    2019-12-27| RX| Complete rejection|
    优先权:
    申请号 | 申请日 | 专利标题
    KR1020140007962A|KR101570921B1|2014-01-22|2014-01-22|Flexible Tube for Exhaust Pipe of Automobiles|
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