[go: up one dir, main page]

KR20020040240A - Shock absorber - Google Patents

Shock absorber Download PDF

Info

Publication number
KR20020040240A
KR20020040240A KR1020000070230A KR20000070230A KR20020040240A KR 20020040240 A KR20020040240 A KR 20020040240A KR 1020000070230 A KR1020000070230 A KR 1020000070230A KR 20000070230 A KR20000070230 A KR 20000070230A KR 20020040240 A KR20020040240 A KR 20020040240A
Authority
KR
South Korea
Prior art keywords
spring
cylinder
shock absorber
piston
shock
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.)
Ceased
Application number
KR1020000070230A
Other languages
Korean (ko)
Inventor
유춘성
Original Assignee
밍 루
주식회사 만도
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by 밍 루, 주식회사 만도 filed Critical 밍 루
Priority to KR1020000070230A priority Critical patent/KR20020040240A/en
Publication of KR20020040240A publication Critical patent/KR20020040240A/en
Ceased legal-status Critical Current

Links

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16FSPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F9/00Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
    • F16F9/10Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium using liquid only; using a fluid of which the nature is immaterial
    • F16F9/14Devices with one or more members, e.g. pistons, vanes, moving to and fro in chambers and using throttling effect
    • F16F9/16Devices with one or more members, e.g. pistons, vanes, moving to and fro in chambers and using throttling effect involving only straight-line movement of the effective parts
    • F16F9/18Devices with one or more members, e.g. pistons, vanes, moving to and fro in chambers and using throttling effect involving only straight-line movement of the effective parts with a closed cylinder and a piston separating two or more working spaces therein
    • F16F9/19Devices with one or more members, e.g. pistons, vanes, moving to and fro in chambers and using throttling effect involving only straight-line movement of the effective parts with a closed cylinder and a piston separating two or more working spaces therein with a single cylinder and of single-tube type
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16FSPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F9/00Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
    • F16F9/32Details
    • F16F9/3207Constructional features
    • F16F9/3235Constructional features of cylinders
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16FSPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F9/00Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
    • F16F9/32Details
    • F16F9/3271Assembly or repair
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16FSPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F2238/00Type of springs or dampers
    • F16F2238/02Springs
    • F16F2238/026Springs wound- or coil-like

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Fluid-Damping Devices (AREA)

Abstract

PURPOSE: A shock absorber is provided to improve endurance of an impact absorbing member, and to protect the shock absorber against shock from vibration of a vehicle by installing the impact absorbing member in the shock absorber. CONSTITUTION: A piston rod(11) is combined with a cylinder(10), and the lower part of the cylinder is connected to an axle of a vehicle. An orifice(13) and a valve are mounted in a piston(12) to circulate oil, and oil is charged in the cylinder. Spring guides(14,15) are placed in the lower part of the piston and the end of the cylinder, and a buffer spring(16) is installed between spring guides. Impact from the road surface is absorbed with damping vibration of the spring by a shock absorber. Spring guides are pressed with the piston by compressing the cylinder in compressing the spring from vibration of the vehicle, and shock is absorbed with spring guides. Endurance is improved with installing the buffer spring in the cylinder.

Description

쇽 업소버{SHOCK ABSORBER}Shock absorber {SHOCK ABSORBER}

본 발명은 차량의 과도한 진동시 발생되는 충격으로부터 쇽 업소버를 보호하기 위해 장착되는 충격흡수 부재에 관한 것으로, 더욱 상세하게는 충격흡수 부재를 쇽 업소버 내부에 장착함으로써 충격흡수 부재의 내구성능을 향상시킬 수 있는 쇽 업소버에 관한 것이다.The present invention relates to a shock absorbing member that is mounted to protect the shock absorber from shock generated during excessive vibration of a vehicle. More particularly, the shock absorbing member may be mounted inside the shock absorber to improve durability of the shock absorbing member. It is about a shock absorber.

현가장치는 주로 차체와 차축 사이에 설치되어 주행 중 노면으로부터 전달되는 충격이나 진동을 완화시켜 바퀴와 노면의 점착성을 향상시키고 승차감을 양호하게 해주는 장치이다.Suspension device is mainly installed between the vehicle body and the axle to reduce the shock or vibration transmitted from the road surface while driving to improve the adhesion between the wheel and the road surface and to improve the riding comfort.

특히, 쇽 업소버(shock absorber)는 노면에서 발생한 스프링의 자유진동을 흡수하여 승차감을 향상시키는 것으로, 스프링이 압축될 때에는 급격히 압축되고 늘어날 때는 오일의 저항력을 크게 하며 서서히 작동함으로서 스프링의 상하운동 에너지를 열에너지로 변환시키는 일을 한다.In particular, the shock absorber absorbs the free vibration of the spring generated on the road surface and improves the riding comfort. When the spring is compressed, it rapidly compresses and increases the resistance of the oil when it increases and gradually operates to increase the up and down kinetic energy of the spring. It converts into heat energy.

이와 같은 쇽 업소버의 일예가 도 1에 도시되어 있다.One example of such a shock absorber is shown in FIG.

도 1에 도시된 바와 같이, 쇽 업소버는 안내를 겸한 길고 가는 실린더(1)의 조합으로 구성되어 있고, 내부에는 차축과 연결되는 실린더(1)와 차체에 연결되는 피스톤 로드(2)가 있으며, 피스톤(3) 상,하의 실린더(1)에는 오일이 가득차 있다. 피스톤(3)에는 오일이 지나가는 작은 구멍(4)(오리피스)이 있고, 이 구멍(4)에는 구멍(4)을 개폐하는 밸브(미도시됨)가 설치되어 있다.As shown in FIG. 1, the shock absorber is composed of a combination of long and thin cylinders 1 serving as guides, and there is a cylinder 1 connected to the axle and a piston rod 2 connected to the vehicle body. The cylinder 1 above and below the piston 3 is filled with oil. The piston 3 has a small hole 4 (orifice) through which oil passes, and the hole 4 is provided with a valve (not shown) for opening and closing the hole 4.

한편, 과도한 차량 진동시 노면의 충격으로부터 쇽 업소버를 보호하기 위한 수단으로 실린더(1) 상부에 완충고무 등과 같은 충격흡수 부재(5)가 설치되어 있다.On the other hand, a shock absorbing member 5, such as a cushioning rubber, is provided on the cylinder 1 as a means for protecting the shock absorber from the impact of the road surface during excessive vehicle vibration.

그런데 이와 같은 종래의 쇽 업소버의 실린더(1) 상부에 설치되는 충격흡수 부재(5)는 통상적으로 플렉시블한 재질의 합성수지가 이용되며, 쇽 업소버 외부에 장착을 하기 때문에 내구성이 떨어지는 단점이 있었다.However, the shock absorbing member 5 installed on the cylinder 1 of the conventional shock absorber 5 is typically made of a synthetic resin of a flexible material, and has a disadvantage in that durability is lowered because it is mounted outside the shock absorber.

따라서 본 발명은 이와 같은 종래의 문제점을 해결하기 위한 것으로, 차량의 과도한 진동시 발생되는 충격으로부터 쇽 업소버를 보호하기 위해 장착되는 충격흡수 부재를 쇽 업소버 내부에 장착함으로써 충격흡수 부재의 내구성능을 향상시킬수 있는 쇽 업소버를 제공하는데 그 목적이 있다.Therefore, the present invention is to solve such a conventional problem, by improving the durability of the shock absorbing member by mounting a shock absorbing member mounted inside the shock absorber to protect the shock absorber from the shock generated during excessive vibration of the vehicle. The goal is to provide a shock absorber that can be enabled.

이와같은 목적을 실현하기 위한 본 발명은 차축과 연결되는 실린더에 차체에 연결되는 피스톤 로드가 결합되며, 피스톤 상,하 챔버에 오일이 가득차 있으며, 피스톤에 오일이 지나가는 오리피스가 마련되어 스프링의 자유진동을 흡수하는 쇽 업소버에 있어서, 상기 실린더 내부의 하단부와 피스톤 하부에 위치한 실린더의 일단에 각각 스프링 가이드를 설치하고, 상기 스프링 가이드 사이에 완충 스프링이 설치되는 것을 특징으로 하는 쇽 업소버를 제공한다.The present invention for realizing the above object is coupled to the piston rod is connected to the vehicle body to the cylinder connected to the axle, the piston is filled with oil in the upper and lower chambers, there is provided an orifice through which the oil passes through the piston free vibration of the spring In the absorber shock absorber, the shock absorber is characterized in that a spring guide is provided at each of the lower end of the cylinder and one end of the cylinder located under the piston, and a buffer spring is installed between the spring guides.

본 발명의 상기 목적과 여러 가지 장점은 이 기술 분야에 숙련된 사람들에 의해 첨부된 도면을 참조하여 아래에 기술되는 발명의 바람직한 실시예로부터 더욱 명확하게 될 것이다.The above objects and various advantages of the present invention will become more apparent from the preferred embodiments of the invention described below with reference to the accompanying drawings by those skilled in the art.

도 1은 종래의 충격흡수 부재가 설치된 쇽 업소버를 도시한 단면도,1 is a cross-sectional view showing a shock absorber installed with a conventional shock absorbing member,

도 2는 본 발명에 따른 완충 스프링이 설치된 쇽 업소버를 도시한 단면도.Figure 2 is a cross-sectional view of the shock absorber is installed shock absorbing spring according to the present invention.

<도면의 주요부분에 대한 부호의 설명><Description of the symbols for the main parts of the drawings>

10 ; 실린더 11 ; 피스톤 로드10; Cylinder 11; Piston rod

12 ; 피스톤 13 ; 오리피스12; Piston 13; Orifice

14,15 ; 스프링 가이드 16 ; 완충 스프링14,15; Spring guide 16; Buffer spring

이하, 첨부된 도면을 참조하여 본 발명의 일실시예를 상세하게 설명한다.Hereinafter, with reference to the accompanying drawings will be described in detail an embodiment of the present invention.

도 2는 본 발명의 일실시예에 따른 쇽 업소버를 도시한 단면도이다.2 is a cross-sectional view showing a shock absorber according to an embodiment of the present invention.

도시된 바와 같이, 본 발명의 일실시예에 따른 쇽 업소버는 차축과 연결되는 길고 가는 실린더(10)의 하단부가 미도시된 차축 위에 설치되고, 실린더(10) 상단부를 통해 실린더(10) 내부를 관통하는 피스톤 로드(11)가 설치되며, 피스톤 로드(11)의 상단부는 미도시된 차체에 설치된다.As shown, the shock absorber according to an embodiment of the present invention is installed on the axle not shown, the lower end of the long thin cylinder 10 is connected to the axle, the cylinder 10 through the upper end of the cylinder 10 A piston rod 11 penetrating is installed, and an upper end of the piston rod 11 is installed in a vehicle body not shown.

한편, 피스톤 로드(11)의 하단부에는 피스톤(12)이 설치되어 있으며, 피스톤(12)의 일단에는 피스톤(12)을 통과하여 오일이 어느 일측 방향으로만 조금씩 지나갈 수 있도록 오리피스(13)와 밸브(미도시됨)가 마련되어 있다. 또한, 실린더(10) 내부에는 오일이 가득차 있다.On the other hand, the lower end of the piston rod 11 is provided with a piston 12, one end of the piston 12 passes through the piston 12 so that the oil can pass only slightly in any one direction so that the orifice 13 and the valve (Not shown) is provided. In addition, the cylinder 10 is filled with oil.

통상적으로 피스톤(12)을 기준으로 해서 피스톤(12) 상부의 챔버는 리바운드 챔버라하고, 피스톤(12) 하부의 챔버는 콤프레션 챔버라 하며 이와 같은 리바운드 챔버 및 콤프레션 챔버는 왕복운동하는 피스톤(12)에 의해 가변적이다.Typically, the chamber above the piston 12 is referred to as a rebound chamber, the chamber below the piston 12 is referred to as a compression chamber, and such a rebound chamber and the compression chamber are referred to as a reciprocating piston. 12).

특히, 본 발명의 특징적인 구성에 따르면, 피스톤(12)의 하부에 위치한 콤프레션 챔버의 일단에 한쌍의 스프링 가이드(14,15)가 설치되고, 이 스프링 가이드(14,15) 사이에 완충 스프링(16)이 설치된다. 즉, 실린더(10) 내부의 하단부와 피스톤(12) 하부에 위치한 실린더(10)의 일단에 각각 스프링 가이드(14,15)가 설치된다.In particular, according to the characteristic constitution of the present invention, a pair of spring guides 14 and 15 is provided at one end of the compression chamber located below the piston 12, and a buffer spring is provided between the spring guides 14 and 15. 16 is installed. That is, the spring guides 14 and 15 are respectively installed at the lower end of the cylinder 10 and one end of the cylinder 10 positioned below the piston 12.

한쌍의 스프링 가이드(14,15) 중 피스톤(12) 하부에 위치한 실린더(10)의 일단에 설치된 스프링 가이드(14)는 실린더(10) 내벽을 따라 이동 가능하게 설치되며, 다른 하나의 스프링 가이드(15), 즉, 실린더(10) 내부의 하단부에 설치된 스프링 가이드(15)는 고정 설치된다.The spring guide 14 installed at one end of the cylinder 10 positioned below the piston 12 among the pair of spring guides 14 and 15 is installed to be movable along the inner wall of the cylinder 10, and the other spring guide ( 15), that is, the spring guide 15 installed at the lower end of the cylinder 10 is fixedly installed.

이와 같이 구성된 쇽 업소버는 노면의 충격을 흡수하기 위해 스프링이 자유진동할 때 스프링의 진동을 감쇠시킨다. 즉, 스프링이 압축될 때에는 급격히 압축되고 스프링이 늘어날 때에는 오리피스를 통과하는 오일의 저항력을 크게 하여 스프링의 진동을 흡수한다.The shock absorber configured as described above damps the vibration of the spring when the spring vibrates to absorb the impact of the road surface. That is, when the spring is compressed, it is rapidly compressed, and when the spring is stretched, the resistance of the oil passing through the orifice is increased to absorb the vibration of the spring.

특히, 차량의 과도한 진동으로 인해 노면의 충격이 직접적으로 쇽 업소버에 전달될 정도로 스프링이 압축될 경우에는 쇽 업소버의 실린더가 압축되면서 피스톤이 스프링 가이드를 가압하게 된다. 이때 스프링 가이드는 완충 스프링에 의해 탄성적으로 지지되어 있으므로 피스톤의 가압력에 탄성적으로 저항하면서 과도하게 전달되는 충격의 일부를 흡수한다.In particular, when the spring is compressed to the extent that the impact of the road surface is directly transmitted to the shock absorber due to excessive vibration of the vehicle, the piston of the shock absorber is compressed and the piston presses the spring guide. At this time, since the spring guide is elastically supported by the shock absorbing spring, it absorbs a part of the excessively transmitted shock while elastically resisting the pressing force of the piston.

이처럼 완충 스프링은 종래의 실린더 상부에 설치된 충격완화 부재의 기능을 효과적으로 수행할 수 있을 뿐만 아니라 실린더 내부에 설치되므로 외부환경에 노출되지 않아 내구성능의 향상을 가져올 수 있으며, 종래의 소모성 합성수지재에 비해 스프링강 재질의 완충 스프링은 반영구적으로 사용할 수 있어 차량의 유지관리에 유리하다.Thus, the shock absorbing spring not only effectively performs the function of the shock absorbing member installed on the upper part of the cylinder, but also is installed inside the cylinder, so that it is not exposed to the external environment, resulting in improved durability, and compared to the conventional consumable synthetic resin material. Shock-absorbing spring made of spring steel can be used semi-permanently, which is advantageous for vehicle maintenance.

이상, 상기 내용은 본 발명의 바람직한 일실시예를 단지 예시한 것으로 본 발명의 당업자는 본 발명의 요지를 변경시킴이 없이 본 발명에 대한 수정 및 변경을 가할 수 있음을 인지해야 한다.In the above description, it should be understood that those skilled in the art can only make modifications and changes to the present invention without changing the gist of the present invention as it merely illustrates a preferred embodiment of the present invention.

상술한 바와 같이 본 발명에 따르면, 차량의 과도한 진동시 발생되는 충격으로부터 쇽 업소버를 보호하기 위해 장착되는 충격흡수 부재를 쇽 업소버 내부에 장착함으로써 충격흡수 부재의 내구성능을 향상시킬 수 있다.As described above, according to the present invention, the durability of the shock absorbing member can be improved by mounting the shock absorbing member mounted inside the shock absorber to protect the shock absorber from the shock generated during excessive vibration of the vehicle.

Claims (1)

차축과 연결되는 실린더에 차체에 연결되는 피스톤 로드가 결합되며, 피스톤 상,하 챔버에 오일이 가득차 있으며, 피스톤에 오일이 지나가는 오리피스가 마련되어 스프링의 자유진동을 흡수하는 쇽 업소버에 있어서,In the shock absorber is coupled to the cylinder connected to the axle, the piston rod connected to the vehicle body is filled with oil in the upper and lower chambers of the piston, the orifice through which the oil passes through the piston to absorb the free vibration of the spring, 상기 실린더 내부의 하단부와 피스톤 하부에 위치한 실린더의 일단에 각각 스프링 가이드를 설치하고, 상기 스프링 가이드 사이에 완충 스프링이 설치되는 것을 특징으로 하는 쇽 업소버.Shock absorber, characterized in that the spring guide is installed in each of the lower end of the cylinder and one end of the cylinder located in the lower piston, and the buffer spring is installed between the spring guide.
KR1020000070230A 2000-11-24 2000-11-24 Shock absorber Ceased KR20020040240A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020000070230A KR20020040240A (en) 2000-11-24 2000-11-24 Shock absorber

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020000070230A KR20020040240A (en) 2000-11-24 2000-11-24 Shock absorber

Publications (1)

Publication Number Publication Date
KR20020040240A true KR20020040240A (en) 2002-05-30

Family

ID=19701109

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1020000070230A Ceased KR20020040240A (en) 2000-11-24 2000-11-24 Shock absorber

Country Status (1)

Country Link
KR (1) KR20020040240A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101589244B1 (en) * 2015-06-01 2016-01-28 차승연 Shock absorber and Chamber including the same
CN119981699A (en) * 2025-04-17 2025-05-13 蒙阴县飞达矿山工程机械有限公司 Drilling rig shock absorber

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3963225A (en) * 1971-06-09 1976-06-15 Girling Limited Telescopic gas springs
JPS61136029A (en) * 1984-12-03 1986-06-23 Nissan Motor Co Ltd Damper
JPH0352441A (en) * 1989-07-20 1991-03-06 Toshiba Corp Radio telephone system
JPH0456940U (en) * 1990-09-26 1992-05-15
KR19990040994A (en) * 1997-11-20 1999-06-15 양재신 Shock absorber of car
JPH11210312A (en) * 1998-01-29 1999-08-03 Unisia Jecs Corp Gas spring device

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3963225A (en) * 1971-06-09 1976-06-15 Girling Limited Telescopic gas springs
JPS61136029A (en) * 1984-12-03 1986-06-23 Nissan Motor Co Ltd Damper
JPH0352441A (en) * 1989-07-20 1991-03-06 Toshiba Corp Radio telephone system
JPH0456940U (en) * 1990-09-26 1992-05-15
KR19990040994A (en) * 1997-11-20 1999-06-15 양재신 Shock absorber of car
JPH11210312A (en) * 1998-01-29 1999-08-03 Unisia Jecs Corp Gas spring device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101589244B1 (en) * 2015-06-01 2016-01-28 차승연 Shock absorber and Chamber including the same
CN119981699A (en) * 2025-04-17 2025-05-13 蒙阴县飞达矿山工程机械有限公司 Drilling rig shock absorber

Similar Documents

Publication Publication Date Title
US4828232A (en) Vehicle air suspension strut with compliant cover plate assembly
KR100488786B1 (en) Fluid compressed strut mounting structure
KR20020040240A (en) Shock absorber
CN211975748U (en) Magneto-rheological shock absorber
KR100911403B1 (en) Car Shock Absorber
KR101756421B1 (en) Shock absorber with a frequency unit
US20200271185A1 (en) Vehicle shock absorber
JPS6067209A (en) Suspension device for vehicle
CN215890913U (en) Vibration damper device
KR200178172Y1 (en) Structure of rear shock-absorber for two wheel automobile
KR200178173Y1 (en) Car shock absorber
KR200291565Y1 (en) The shock absorbing structure for a shock absorber
KR20110067531A (en) Shock absorber with hydraulic stopping structure
KR100268079B1 (en) Shock absorber for car
KR100268080B1 (en) Automobile Shock Absorber
KR200181042Y1 (en) Shock absorber for vehicle suspension
KR100489369B1 (en) Damping device use in a shock absorber
KR100769524B1 (en) Shock absorber
KR20020043857A (en) Rebound stopper rubber for use in a shock absorber
KR100445986B1 (en) Shock absorber
KR100996866B1 (en) Shock absorber
KR20020040313A (en) Stopper of a shock absorber
KR19980054389U (en) Shock Absorber Structure of Shock Absorber for Automobile Suspension
KR100834139B1 (en) Shock absorber
KR0116172Y1 (en) Suspension of suspension system

Legal Events

Date Code Title Description
PA0109 Patent application

Patent event code: PA01091R01D

Comment text: Patent Application

Patent event date: 20001124

A201 Request for examination
PA0201 Request for examination

Patent event code: PA02012R01D

Patent event date: 20011019

Comment text: Request for Examination of Application

Patent event code: PA02011R01I

Patent event date: 20001124

Comment text: Patent Application

PG1501 Laying open of application
E902 Notification of reason for refusal
PE0902 Notice of grounds for rejection

Comment text: Notification of reason for refusal

Patent event date: 20040503

Patent event code: PE09021S01D

E601 Decision to refuse application
PE0601 Decision on rejection of patent

Patent event date: 20040923

Comment text: Decision to Refuse Application

Patent event code: PE06012S01D

Patent event date: 20040503

Comment text: Notification of reason for refusal

Patent event code: PE06011S01I