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Machine translation
1. (WO2015037760) CONSTRUCTION MACHINE FLOAT VALVE
Latest bibliographic data on file with the International Bureau   

Pub. No.:    WO/2015/037760    International Application No.:    PCT/KR2013/008289
Publication Date: 19.03.2015 International Filing Date: 13.09.2013
IPC:
E02F 9/22 (2006.01), F16K 11/07 (2006.01), E02F 3/42 (2006.01)
Applicants: VOLVO CONSTRUCTION EQUIPMENT AB [SE/SE]; SE-631 85 Eskilstuna (SE).
KANG, Min-Heuk [KR/KR]; (KR) (US only)
Inventors: KANG, Min-Heuk; (KR)
Agent: YOON, Eui-Seoup; 17F., UNIK Bldg., 706-13, Yeoksam-dong Gangnam-gu Seoul 135-080 (KR)
Priority Data:
Title (EN) CONSTRUCTION MACHINE FLOAT VALVE
(FR) VANNE À FLOTTEUR D'ENGIN DE CONSTRUCTION
(KO) 건설기계용 플로트 밸브
Abstract: front page image
(EN)Disclosed is a construction machine float valve capable of removing a spool stick phenomenon if this occurs in the process of flattening and leveling work. According to the present invention, provided is a construction machine float valve comprising: a valve block having a first actuator port and a second actuator port communicating with a large chamber and a small chamber of a hydraulic cylinder of a work device, and a tank port alternatively communicating with the first actuator port and the second actuator port; a holding poppet provided to be opened or closed to a path for connecting the first actuator port to the second actuator port; a spool provided in the valve block so as to be convertible and converting the holding poppet to a holding function-releasing position so as to open the path at the time of the spool conversion; a boom-up signal pressure port to which boom-up pilot pressure is applied so as to restore the spool to a neutral position if the spool has not been restored to the neutral position when the boom-down pilot pressure is released; a piston pressing the spool by the boom-up pilot pressure applied to the boom-up signal pressure port so as to restore the spool to the neutral position; and a drain port for draining hydraulic oil from a pressure chamber if the piston is pressed by the boom-up pilot pressure and if the spool is converted by the boom-down pilot pressure.
(FR)L'invention concerne une vanne à flotteur d'engin de construction susceptible d'éliminer un phénomène de grippage de tiroir si celui-ci se produit au cours d'un travail d'aplanissement et de nivellement. La présente invention concerne une vanne à flotteur d'engin de construction comprenant : un distributeur possédant un premier orifice d'actionneur et un second orifice d'actionneur communiquant avec une grande chambre et une petite chambre d'un vérin hydraulique d'un dispositif de travail, et un orifice de réservoir communiquant en alternance avec le premier orifice d'actionneur et le second orifice d'actionneur ; un clapet de maintien pouvant être ouvert ou fermé sur un chemin permettant de raccorder le premier orifice d'actionneur au second orifice d'actionneur ; un tiroir ménagé dans le distributeur de façon à être convertible et convertissant le clapet de maintien à une position de libération de fonction de maintien de façon à ouvrir le chemin au moment de la conversion du tiroir ; un orifice de pression de signal de levée de flèche auquel une pression pilote de levée de flèche est appliquée de façon à ramener le tiroir à une position neutre si le tiroir n'a pas été ramené à la position neutre lorsque la pression pilote de descente de flèche est libérée ; un piston pressant le tiroir par la pression pilote de levée de flèche appliquée à l'orifice de pression de signal de levée de flèche de façon à ramener le tiroir à la position neutre ; et un orifice d'évacuation pour évacuer l'huile hydraulique d'une chambre de pression si le piston est pressé par la pression pilote de levée de flèche et si le tiroir est converti par la pression pilote de descente de flèche.
(KO)평탄 정지작업하는 도중에 스풀의 스틱현상이 발생될 경우 이를 제거시킬 수 있는 건설기계용 플로트 밸브를 개시한다. 본 발명에 따른 건설기계용 플로트 밸브에 있어서, 작업장치의 유압실린더의 라지챔버 및 스몰챔버와 연통되는 제1액츄에이터포트와 제2액츄에이터포트와, 상기 제1액츄에이터포트 및 제2액츄에이터포트와 선택적으로 연통되는 탱크포트가 형성되는 밸브블록;상기 제1액츄에이터포트를 상기 제2액츄에이터포트 및 탱크포트에 연결하는 통로에 개폐가능하게 설치되는 홀딩포펫; 상기 밸브블록 내에 절환가능하게 설치되는 스풀, 스풀 절환시 상기 홀딩포펫을 홀딩기능 해제위치로 전환시켜 상기 통로를 개방시키킴; 상기 붐 다운 파일럿압력의 해제시 상기 스풀이 중립위치로 복귀되지않을 경우, 상기 스풀을 중립위치로 복귀시키기 위해 붐 업 파일럿압력이 인가되는 붐 업 신호압력포트; 상기 붐 업 신호압력포트에 인가되는 상기 붐 업 파일럿압력에 의해 상기 스풀을 가압하여 중립위치로 복귀시키는 피스톤; 상기 붐 업 파일럿압력에 의해 상기 피스톤이 가압되는 경우와 상기 붐 다운 파일럿압력에 의해 상기 스풀이 절환되는 경우, 압력실로부터 작동유를 드레인시키는 드레인포트;를 구비하여 이루어지는 것을 특징으로 하는 건설기계용 플로트 밸브를 제공한다.
Designated States: AE, AG, AL, AM, AO, AT, AU, AZ, BA, BB, BG, BH, BN, BR, BW, BY, BZ, CA, CH, CL, CN, CO, CR, CU, CZ, DE, DK, DM, DO, DZ, EC, EE, EG, ES, FI, GB, GD, GE, GH, GM, GT, HN, HR, HU, ID, IL, IN, IS, JP, KE, KG, KN, KP, KR, KZ, LA, LC, LK, LR, LS, LT, LU, LY, MA, MD, ME, MG, MK, MN, MW, MX, MY, MZ, NA, NG, NI, NO, NZ, OM, PA, PE, PG, PH, PL, PT, QA, RO, RS, RU, RW, SA, SC, SD, SE, SG, SK, SL, SM, ST, SV, SY, TH, TJ, TM, TN, TR, TT, TZ, UA, UG, US, UZ, VC, VN, ZA, ZM, ZW.
African Regional Intellectual Property Organization (BW, GH, GM, KE, LR, LS, MW, MZ, NA, RW, SD, SL, SZ, TZ, UG, ZM, ZW)
Eurasian Patent Organization (AM, AZ, BY, KG, KZ, RU, TJ, TM)
European Patent Office (AL, AT, BE, BG, CH, CY, CZ, DE, DK, EE, ES, FI, FR, GB, GR, HR, HU, IE, IS, IT, LT, LU, LV, MC, MK, MT, NL, NO, PL, PT, RO, RS, SE, SI, SK, SM, TR)
African Intellectual Property Organization (BF, BJ, CF, CG, CI, CM, GA, GN, GQ, GW, KM, ML, MR, NE, SN, TD, TG).
Publication Language: Korean (KO)
Filing Language: Korean (KO)