KR20030067818A - High-pressure and double-acting hydraulic pumping apparatus - Google Patents

High-pressure and double-acting hydraulic pumping apparatus Download PDF

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Publication number
KR20030067818A
KR20030067818A KR1020020007285A KR20020007285A KR20030067818A KR 20030067818 A KR20030067818 A KR 20030067818A KR 1020020007285 A KR1020020007285 A KR 1020020007285A KR 20020007285 A KR20020007285 A KR 20020007285A KR 20030067818 A KR20030067818 A KR 20030067818A
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KR
South Korea
Prior art keywords
nipple
oil
high pressure
line
pressure pump
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KR1020020007285A
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Korean (ko)
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박춘식
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박춘식
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Priority to KR1020020007285A priority Critical patent/KR20030067818A/en
Publication of KR20030067818A publication Critical patent/KR20030067818A/en

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B13/00—Details of servomotor systems ; Valves for servomotor systems
    • F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/20—Fluid pressure source, e.g. accumulator or variable axial piston pump
    • F15B2211/205—Systems with pumps
    • F15B2211/20576—Systems with pumps with multiple pumps
    • F15B2211/20584—Combinations of pumps with high and low capacity
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/40—Flow control
    • F15B2211/405—Flow control characterised by the type of flow control means or valve
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/50—Pressure control
    • F15B2211/505—Pressure control characterised by the type of pressure control means

Abstract

PURPOSE: A cylinder shaft of a hydraulic device is operated fast in an initial operation applying a high pressure, thereby improving working efficiency. CONSTITUTION: A high pressure double hydraulic pump device is composed of a high pressure pump(10) pumping oil by piston(15). A low pressure pump(20) is installed in one side of a driving shaft(12). A first nipple(42) is connected to an oil inlet of the low pressure pump connecting to an oil line of an oil tank(30). A second nipple(51) is connected to the high pressure pump with a line(50) passing a check valve(52). The other side of the second nipple is connected to a pressure check valve, a third nipple.

Description

고압(高壓) 이중 유압펌프장치{HIGH-PRESSURE AND DOUBLE-ACTING HYDRAULIC PUMPING APPARATUS}High pressure dual hydraulic pump device {HIGH-PRESSURE AND DOUBLE-ACTING HYDRAULIC PUMPING APPARATUS}

본 발명은 고압 이중 유압장치에 관한 것으로, 좀 더 구체적으로는 자동차 정비 기구 등 산업 기계에서 고압력이 요구되는 유압장치에 적용하여 초기 작동단계에서 신속히 고압의 유압기능을 부여할 수 있도록 하는 고압 이중 유압펌프장치에 관한 것이다.The present invention relates to a high pressure double hydraulic pressure device, and more specifically, high pressure double hydraulic pressure to be applied to a hydraulic device that requires high pressure in an industrial machine, such as a car maintenance mechanism to provide a high pressure hydraulic function quickly in the initial operation stage. It relates to a pump device.

일반적으로 고압의 유압 펌프장치는 오일을 공급할 때 공급하는 압력을 높이려면 오일의 공급량이 적어야 소용량의 모타를 갖는 펌프로도 부하가 걸리지 않고 신속하게 압축하여 설정된 압력으로 높일 수 있으나 오일의 공급량이 적어 실린더실에 오일이 충진되어 실린더축이 하사점까지 이르도록 충진이 될려면 어느정도의 지체시간이 요구됨에 따라 작업시간을 지체하는 등의 문제점이 있다. 그리고 오일의 주입량이 많으면 실린더축의 하강속도가 빠르게 될 수 있으나 많은량을 압축시킬려면 그에 따른 펌프의 용량을 비례적으로 커져야 함에 따라 제작단가가 상당히 높아지고 소용량보다 부하가 커져 유압펌프의 수명을 저하시키는 등의 문제점이 있으며, 압력을 높이지 못할 경우 실린더축의 누르는 힘이 약해 고압을 요구하는 작업기계에 적용하기 어려운 문제점이 있다.In general, the high pressure hydraulic pump device needs to supply a small amount of oil to increase the supply pressure when supplying oil, and even a pump with a small capacity motor can be quickly compressed and increased to a set pressure without being loaded, but the amount of oil supplied is small. In order to fill the cylinder chamber to fill the cylinder shaft to the bottom dead center, there is a problem such as delaying the working time as a certain delay time is required. And if the amount of oil is injected, the descending speed of the cylinder shaft can be increased, but in order to compress a large amount, the capacity of the pump must be increased proportionally, so the production cost is considerably higher and the load is larger than the small capacity, which reduces the life of the hydraulic pump. There is a problem such as, if the pressure can not be increased, the pressing force of the cylinder shaft is weak, there is a problem that is difficult to apply to a work machine that requires high pressure.

일례로 자동차 정비기계 중 쇽업소버의 스프링을 분해, 조립할 경우 스프링의 압축력이 상당히기 때문에 일반적인 유압기로는 지지하기 어려운 문제점으로 고압의 유압기가 요구되는 것이다.For example, when disassembling and assembling the spring of the shock absorber in a car maintenance machine, the compression force of the spring is considerably high, which is difficult to support with a general oil pressure, and thus a high pressure oil pressure is required.

본 발명의 목적은 고압을 부여하면서 최초 작동할 때 사용기기의 유압기 실린더축이 신속하게 작동이 이루어지도록 하여 유압기의 효율성을 극대화로 작업능률을 향상시키도록 한 고압 이중 유압 펌프장치를 제공함에 있다.An object of the present invention is to provide a high-pressure double hydraulic pump device to improve the working efficiency by maximizing the efficiency of the hydraulic cylinder cylinder to be operated quickly when the first operation while applying a high pressure.

상기한 목적을 달성하기 위한 본 발명은,The present invention for achieving the above object,

모터의 구동에 의하여 구동되는 구동축의 편심륜에 의하여 피스톤이 승하강하여 유입되는 오일을 압축시키어 송출하는 고압펌프와,A high pressure pump for compressing and pumping oil flowing in and out of the piston by the eccentric wheel of the drive shaft driven by the driving of the motor;

상기 구동축의 한측에 축설되어 구동축의 회전에 의하여 펌핑하는 저압펌프와,A low pressure pump arranged on one side of the drive shaft and pumped by rotation of the drive shaft;

저압펌프의 오일 공급측에 연결한 제1 닛플에 오일탱크의 오일공급 라인을 연결하고 오일 출구측에 설치한 제2 닛플의 한측은 첵크밸브를 거치는 라인을 고압펌프의 입구측에 연결하고 타측은 압력첵크밸브, 제3 닛플, 첵크밸브를 거치는 라인을 고압펌프의 출구측에 연결함과,The oil supply line of the oil tank is connected to the first nipple connected to the oil supply side of the low pressure pump, and one side of the second nipple installed at the oil outlet side connects a line through the check valve to the inlet side of the high pressure pump and the other Connecting the line through the check valve, the third nipple and the check valve to the outlet side of the high pressure pump,

상기 제3 닛플의 한측에 구비한 압력조절밸브에 제1 닛플과 연결하여 오일을 회수하는 라인을 연결하고 또한 타측에 사용기기의 유압기에 연결됨과,Connecting a line for recovering oil by connecting with a first nipple to a pressure regulating valve provided at one side of the third nipple, and connected to a hydraulic unit of a used device on the other side;

상기 제2 닛플에서 회수되는 라인에 유량조절밸브를 구비함을 특징으로 한다.It is characterized in that the flow rate control valve is provided in the line to be recovered from the second nipple.

도 1 은 본 발명에 적용되는 이중 유압펌프의 구성도1 is a configuration diagram of a double hydraulic pump applied to the present invention

도 2 는 본 발명의 시스템을 보인 구성도2 is a block diagram showing a system of the present invention

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

10: 고압펌프 12: 구동축10: high pressure pump 12: drive shaft

121: 편심륜 15:편심축121: eccentric ring 15: eccentric shaft

20: 저압펌프 40,50,60,60',70,80: 연결 라인20: low pressure pump 40, 50, 60, 60 ', 70, 80: connection line

42,51,62: 닛플42,51,62: nipple

이하, 첨부한 도면에 의하여 본 발명이 바람직한 실시예를 상세히 설명하면 다음과 같다.Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

도 1은 고압펌프의 구성을 보인 것으로,Figure 1 shows the configuration of the high pressure pump,

모타(도면에 도시하지 않았음)의 동력을 전달하는 풀리(11)를 축설한 구동축(12)을 블록체(13)상에 베어링(14)으로 지지하고 블록체(13)에 수직으로 편심륜(121)에 접하도록 피스톤(15)을 탄설하여 구동축(12)의 회전에 의하여 피스톤(15)의 승하강으로 입국측의 공급공(131)으로 공급되는 오일을 압축시키어 출구측의 송출공(132)으로 송출되도록 구성한 것이다.A drive shaft 12 having a pulley 11 for transmitting power of a motor (not shown) is supported by a bearing 14 on the block 13 and an eccentric wheel perpendicular to the block 13. The piston 15 is placed in contact with the 121 and the oil supplied to the supply hole 131 on the entry side is compressed by the lowering and lowering of the piston 15 by the rotation of the drive shaft 12 to discharge the discharge hole on the outlet side ( 132) is configured to be sent.

그리고 상기 구동축(12)의 한측에 축설되어 구동축(12)의 회전에 의하여 오일을 강제적으로 송출되도록 하는 기어펌프 등의 저압펌프(20)를 구비한다.And it is provided on one side of the drive shaft 12 is provided with a low pressure pump 20, such as a gear pump for forcibly sending oil by the rotation of the drive shaft 12.

도 2 는 본 발명의 전체 구성시스템으로,2 is an overall configuration system of the present invention,

저압펌프(20)의 오일 입구측(21)에 연결되는 제1 닛플(42)에 의해 오일탱크(30)의 오일공급 라인(40)을 연결하여 오일을 공급되도록 하면서 적정위치에 오일공급을 개폐하는 개폐밸브(41)를 설치하고, 저압펌프(20)의 오일 출구측(22)에 연결되는 제2 닛플(51)의 한측은 첵크밸브(52)를 거쳐 고압펌프(10)의 입구측에 라인(50)을 연결하여 저압펌프(20)에 의하여 송출되는 오일을 고압펌프(10)에 공급되도록 한다.The oil supply line is opened and closed by connecting the oil supply line 40 of the oil tank 30 by the first nipple 42 connected to the oil inlet side 21 of the low pressure pump 20 to supply the oil. One side of the second nipple 51 connected to the oil outlet side 22 of the low pressure pump 20 is connected to the inlet side of the high pressure pump 10 via the check valve 52. The line 50 is connected to supply the oil discharged by the low pressure pump 20 to the high pressure pump 10.

그리고 제2 닛플(51)의 타측은 압력 첵크밸브(61), 제3 닛플(62), 첵크밸브(63)를 거치는 라인(60)(60')을 고압펌프(10)의 출구측에 연결하여 압력 첵크밸브(61)에 설정된 압력 이상이 미치면 자동으로 폐쇄되어 저압펌프(20)의 라인측으로 설정압력 이상이 미치는 것을 차단되도록 한다.The other side of the second nipple 51 connects the lines 60 and 60 'through the pressure check valve 61, the third nipple 62 and the check valve 63 to the outlet side of the high pressure pump 10. When the pressure check valve 61 is over the set pressure is automatically closed so that the more than the set pressure to the line side of the low pressure pump 20 is blocked.

상기 제3 닛플(62)에 구비한 압력조절밸브(64)에 제1 닛플(42)과 연결하여 오일을 회수하는 라인(70)을 연결하여 고압펌프(10)에 의해 송출되는 오일의 압력이 사용기기(90)의 유압기에 연결되는 라인(80)에 적정 고압력을 보내도록 압력을 조절하고 이 과정에서 누출되는 오일을 회수할 수 있도록 한 것이며, 제3 닛플(62)과 사용기기(90)와 연결하는 라인(80)에 닛플을 추가로 설치하여 라인(80)의 인출 또는 복수개를 연결할 수도 있다.The pressure of the oil sent by the high pressure pump 10 is connected by connecting a line 70 for recovering oil by connecting the first nipple 42 to the pressure regulating valve 64 provided in the third nipple 62. The pressure is adjusted to send an appropriate high pressure to the line 80 connected to the hydraulic unit of the used device 90 and the oil leaked in this process can be recovered, and the third nipple 62 and the used device 90 An nipple may be additionally installed on the line 80 to connect with and connected to the withdrawal or a plurality of lines 80.

상기 제2 닛플(51)에 연결한 유량조절밸브(53)를 회수되는 라인(70)과 연결하여 고압펌프(10)로 보내지는 적정 오일량를 조정하여 보내고 그 이상의 오일은 회수될 수 있도록 한 것이다.The flow rate control valve 53 connected to the second nipple 51 is connected to the line 70 to be recovered to adjust an appropriate amount of oil sent to the high pressure pump 10 so that more oil can be recovered. .

이와 같이 구성한 본 발명의 작동 상태를 살펴보면,Looking at the operating state of the present invention configured as described above,

모타에 의한 풀리(11)의 동력전달로 구동축(12)이 회전하면 블록체(13)에 탄설된 피스톤(15)이 구동축(12)에 형성한 편심륜(121)에 의하여 상하작동이 이루어지는 동시에 저압펌프(20)인 기어펌프의 작동으로 공급되는 오일탱크(30)의 오일이 제1 닛플(42)을 통해 입구측(21)으로 강제적으로 송출하여 출구측(22)에 연결되어 제2 닛플(51) 및 첵크밸브(52)를 거쳐지는 라인(50)을 통해 고압펌프(10)의 입구측인 공급공(131)으로 보내지고 유입된 오일은 고압펌프(10)에서 피스톤(15)의 고속 승하강작동으로 고압력으로 압축되면서 송출공(132)을 통해 제3 닛플(62)로 연결되는 라인(60')으로 송출되어 사용기기(90)에 연결되는 라인(80)으로 보내지며, 동시에 제2 닛플(51)에서 일부의 오일은 라인(60)을 거쳐 제3 닛플(62)을 거쳐 추가로 공급되어 최초 시용기기(90)의 실린더축 하강속도를 빠르게 할 수 있게 되는 것이다.When the drive shaft 12 is rotated by the power transmission of the pulley 11 by the motor, the piston 15 mounted on the block 13 is moved up and down by the eccentric wheel 121 formed on the drive shaft 12. The oil of the oil tank 30 supplied by the operation of the gear pump as the low pressure pump 20 is forcibly sent to the inlet side 21 through the first nipple 42 and connected to the outlet side 22 to the second nipple. Through the line 50 passing through the 51 and the check valve 52 to the supply hole 131, which is the inlet side of the high pressure pump 10, the introduced oil is introduced into the piston 15 of the high pressure pump 10. While being compressed at high pressure by a high speed raising and lowering operation, it is sent to the line 60 'which is connected to the third nipple 62 through the outlet hole 132 and is sent to the line 80 which is connected to the apparatus 90. Some of the oil in the second nipple 51 is additionally supplied via the line 60 through the third nipple 62 to lower the cylinder shaft of the first trial equipment 90. You will be able to speed up.

여기서 고압펌프(10)로 소량의 오일을 압축시키어 보내면서 동시에 저압펌프(20)에 의하여 오일을 추가로 별도 공급시키어 보내므로서 사용기기(90)의 유압기에 실린더축의 최초 하강속도를 높일 수 있는 것이다.Here, by compressing and sending a small amount of oil to the high pressure pump 10 and at the same time additionally supplying additional oil by the low pressure pump 20 to increase the initial descending speed of the cylinder shaft to the hydraulic oil of the used device 90 will be.

위와 같은 작동에 의하여 고압펌프(10)에 의한 압축력에 의하여 송출측 라인에 서서히 압력이 상승되어 저압펌프(20)에서 보내오는 오일의 압력보다 높아질 경우 압력 첵크밸브(61)가 자동으로 차단되어 오일의 보충 공급시키는 라인(60)을 차단함에 따라 이때 부터는 고압의 오일이 사용기기에 송출되어 사용기기(90)의 유압기에 의하여 각종 기기의 조립, 분해나 가공에 필요한 힘을 갖는 부여하게 되는 것이다.The pressure check valve 61 is automatically shut off when the pressure is gradually increased in the delivery side line by the compression force of the high pressure pump 10 by the above operation and becomes higher than the pressure of the oil sent from the low pressure pump 20. By blocking the line 60 to supplement the supply of high-pressure oil from this time is sent to the used device is to have the necessary force for the assembly, disassembly or processing of the various devices by the oil pressure of the used device (90).

그리고 상기 작동과정에서 고압펌프(10)에 의해 송출되는 오일의 압력이 압력조절밸브(64)에 의하여 설정된 상태에서 설정압력 이상이 발생되면 압력조절밸브(64)가 개방되어 회수되는 라인(70)으로 압력이 분산되어 사용기기(90)로 보내는 오일의 압력을 내려 설정 압력 이하에서만 송출되고 일부 회수 라인(70)으로 나오는 오일은 저압펌프(20)의 입구측(21)으로 다시 공급된다.And when the pressure of the oil sent by the high-pressure pump 10 in the operating process is set by the pressure control valve 64 more than the set pressure occurs, the pressure control valve 64 is opened and recovered line 70 The pressure is dispersed to lower the pressure of the oil to be sent to the user equipment 90 is sent out only below the set pressure and the oil coming out of some recovery line 70 is supplied back to the inlet side 21 of the low pressure pump 20.

한편, 저압펌프(20)에서 공급되는 오일의 량을 조절할 경우에는 제2 닛플(51)에 설치된 유량조절밸브(53)에 의하여 오일량의 조절로 사용기기(90)의 유압기에 실린더축의 최초 하강속도를 조절할 수 있다On the other hand, when adjusting the amount of oil supplied from the low pressure pump 20 by the flow control valve 53 installed in the second nipple 51 to adjust the amount of oil to lower the cylinder shaft first to the oil pressure of the device 90 I can regulate the speed

위와 같이 사용기기(90)의 유압기를 최초 작동시킬 때 고압펌프(10)와 저압펌프(20)가 함께 오일을 공급시키므로 유압기의 실린더축을 신속히 하강시키어 작업의 개시를 신속하게 할 수 있고 일정의 고압으로 이르게 되면 자동으로 저압펌프에 의한 오일의 보충이 중지되어 정상적인 유압기의 작동이 수행되는 것이다.High pressure pump 10 and low pressure pump 20 supply oil together when the oil machine of the user equipment 90 is operated for the first time, so that the cylinder shaft of the oil machine can be quickly lowered to quickly start work and to maintain a high pressure. When it reaches to, the replenishment of the oil by the low pressure pump is automatically stopped and normal oil pressure operation is performed.

이상과 같이 본 발명은 사용기기 유압기가 최초 작동할 때 고압펌프 및 저압펌의 유기적인 시스템에 의하여 신속히 작동이 이루어져 작업시간을 지연시키지 않고 신속히 대처할 수 있어 작업 능률을 향상시키고 사용기기의 기능을 향상시키는 등의 효과가 있다.As described above, the present invention can be quickly operated by the organic system of the high-pressure pump and low-pressure pump when the hydraulic device used for the first time can be quickly responded without delaying the work time to improve the work efficiency and improve the function of the equipment used It is effective to make it.

Claims (3)

모터에 의하여 구동되는 구동축(12)의 편심륜(121)에 의하여 피스톤(15)이 승하강하여 유입되는 오일을 압축시키어 송출하는 고압펌프(10)와,A high pressure pump 10 which compresses and sends oil introduced by the piston 15 ascending and descending by the eccentric wheel 121 of the drive shaft 12 driven by the motor, and 상기 구동축(12)의 한측에 축설되어 구동축(12)의 회전에 의하여 펌핑하는 저압펌프(20)와,A low pressure pump 20 arranged on one side of the drive shaft 12 and pumped by rotation of the drive shaft 12; 저압펌프(20)의 오일 입구측에 연결한 제1 닛플(42)에 오일탱크(30)의 오일 공급 라인(40)을 연결하고 오일 출구측(22)에 설치한 제2 닛플(51)의 한측은 첵크밸브(52)를 거치는 라인(50)을 고압펌프(10)의 입구측에 연결함과,An oil supply line 40 of the oil tank 30 is connected to the first nipple 42 connected to the oil inlet side of the low pressure pump 20 and the second nipple 51 installed on the oil outlet side 22. One side is connected to the inlet side of the high pressure pump 10, the line 50 through the check valve 52, 제2 닛플(51)의 다른 측은 압력첵크밸브(61), 제3 닛플(62), 첵크밸브(63)를 거치는 라인(60)(60')을 고압펌프(10)의 출구측에 연결함과,The other side of the second nipple 51 connects the lines 60 and 60 'passing through the pressure check valve 61, the third nipple 62, and the check valve 63 to the outlet side of the high pressure pump 10. and, 제3 닛플(62)의 한측에 연결한 라인(70)을 제1 닛플(42)에 연결하여 오일을 회수되도록 하고 타측에 사용기기에 오일을 공급하는 라인(80)을 연결함,Connecting the line 70 connected to one side of the third nipple 62 to the first nipple 42 to recover the oil and connecting the line 80 to supply the oil to the equipment used on the other side, 을 특징으로 하는 고압 이중 유압펌프장치.High pressure dual hydraulic pump device characterized in that. 제 1 항에 있어서, 상기 제2 닛플(51)에 유량조절밸브(53)를 연결하여 회수되는 라인(70)과 연결함을 특징으로 하는 고압 이중 유압펌프장치.The high pressure double hydraulic pump apparatus according to claim 1, wherein the second nipple is connected to a line 70 recovered by connecting a flow control valve 53 to the second nipple. 제1항에 있어서, 상기 제3 닛플(62)에 압력조절밸브(64)를 연결하여 회수되는 라인(70)과 연결함을 특징으로 하는 고압 이중 유압펌프장치.2. The high pressure dual hydraulic pump device according to claim 1, wherein the third nipple is connected to a line 70 recovered by connecting a pressure control valve 64 to the third nipple.
KR1020020007285A 2002-02-08 2002-02-08 High-pressure and double-acting hydraulic pumping apparatus KR20030067818A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100847097B1 (en) * 2007-02-09 2008-07-18 차석진 A device spraying a compost for a tracter
KR101581834B1 (en) * 2015-03-24 2015-12-31 박기성 Integrated corneal photoablation system for correction of both shape error and curvature error

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100847097B1 (en) * 2007-02-09 2008-07-18 차석진 A device spraying a compost for a tracter
KR101581834B1 (en) * 2015-03-24 2015-12-31 박기성 Integrated corneal photoablation system for correction of both shape error and curvature error

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