公开(公告)号：EP1167778A4

公开(公告)日：2002-07-24

申请号：EP99940586

申请日：1999-08-31

申请人： AMADA ENGINEERING CT CO LTD ,  AMADA CO LTD ,  NAITO KINSHIRO

发明人： NAITO KINSHIRO ,  SHIMIZU MASAYUKI ,  HARA HIDEO ,  TAKAHASHI OSAMU

IPC分类号： F15B11/17 ,  F15B13/04 ,  F15B13/044 ,  F16K11/078 ,  B30B15/16 ,  F15B11/028 ,  F15B11/042

CPC分类号： F16K11/078 ,  D04H18/02 ,  F15B11/17 ,  F15B13/0402 ,  F15B13/0406 ,  F15B13/0444 ,  F15B2211/20592 ,  F15B2211/31582 ,  F15B2211/327 ,  F15B2211/6654 ,  Y10T137/86549

摘要： A rotary servo valve (1) comprising at least two types of high and low pressure pump ports (33, 39), wherein a rotatable and linearly reciprocating spool (11) is installed through a spool guide hole (7) in a valve main body (9), a servo motor (15) drivingly rotating the spool and a linear actuator (13) reciprocatingly moving it are provided, whereby the pump ports can be switched selectively by the reciprocating movement of the spool and the cylinder ports can be switched selectively and flow rate can be controlled by the rotation.