公开(公告)号：EP2847469A1

公开(公告)日：2015-03-18

申请号：EP13724999.1

申请日：2013-05-09

申请人： Eaton Corporation

发明人： CARLIN, Jerry, Faye ,  IRETON, Robin, Francis ,  GEHLHOFF, Wade, Leo ,  PEDERSEN, Leif

IPC分类号： F15B11/044

CPC分类号： F15B1/04 ,  F15B11/003 ,  F15B11/0445 ,  F15B11/161 ,  F15B2211/20546 ,  F15B2211/30505 ,  F15B2211/30515 ,  F15B2211/30535 ,  F15B2211/3122 ,  F15B2211/3144 ,  F15B2211/40515 ,  F15B2211/41527 ,  F15B2211/426 ,  F15B2211/46 ,  F15B2211/6306 ,  F15B2211/6313 ,  F15B2211/634 ,  F15B2211/6346 ,  F15B2211/761 ,  F15B2211/8609 ,  F15B2211/88

摘要： A hydraulic circuit for lifting and lowering a load is disclosed. The hydraulic circuit may include a hydraulic pump, a fluid reservoir, a load-sense valve, and a hydraulic actuator having a first chamber and a second chamber. The hydraulic circuit may also include a first control valve assembly having first and second lowering positions, the valve being disposed between the hydraulic pump and the hydraulic actuator. A second control valve assembly may also be provided that is disposed between the first control valve assembly and the first chamber of the hydraulic actuator. In one embodiment, the second control valve assembly has a first position and a second position. In one embodiment, the load can be selectively lowered by the hydraulic circuit without use of the hydraulic pump when the first control valve assembly is in the first lowering position and the second control valve assembly is in the second position.

公开(公告)号：EP2847469B1

公开(公告)日：2018-03-28

申请号：EP13724999.1

申请日：2013-05-09

申请人： Eaton Corporation

发明人： CARLIN, Jerry, Faye ,  IRETON, Robin, Francis ,  GEHLHOFF, Wade, Leo ,  PEDERSEN, Leif

IPC分类号： F15B11/044

CPC分类号： F15B1/04 ,  F15B11/003 ,  F15B11/0445 ,  F15B11/161 ,  F15B2211/20546 ,  F15B2211/30505 ,  F15B2211/30515 ,  F15B2211/30535 ,  F15B2211/3122 ,  F15B2211/3144 ,  F15B2211/40515 ,  F15B2211/41527 ,  F15B2211/426 ,  F15B2211/46 ,  F15B2211/6306 ,  F15B2211/6313 ,  F15B2211/634 ,  F15B2211/6346 ,  F15B2211/761 ,  F15B2211/8609 ,  F15B2211/88

摘要： A hydraulic circuit for lifting and lowering a load is disclosed. The hydraulic circuit may include a hydraulic pump, a fluid reservoir, a load-sense valve, and a hydraulic actuator having a first chamber and a second chamber. The hydraulic circuit may also include a first control valve assembly having first and second lowering positions, the valve being disposed between the hydraulic pump and the hydraulic actuator. A second control valve assembly may also be provided that is disposed between the first control valve assembly and the first chamber of the hydraulic actuator. In one embodiment, the second control valve assembly has a first position and a second position. In one embodiment, the load can be selectively lowered by the hydraulic circuit without use of the hydraulic pump when the first control valve assembly is in the first lowering position and the second control valve assembly is in the second position.