Balanced piston relief valve
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专利名称：Balanced piston relief valve
发明人：Yamamoto, Yoshirhiro,Ioku, Kensuke
申请号：EP98309607.4
申请日：19981124
公开号：EP0919752A3
公开日：
20010502
专利内容由知识产权出版社提供
专利附图：
摘要：A balanced piston relief valve (1) with reduced noise includes a main valve element (4) for selectively opening and closing a communication path between a high pressure circuit (50) and a low pressure circuit (51), a back pressure chamber (5) into which back pressure tending to urge the main valve element (4) to its closing position is
introduced from the high pressure circuit via a choke (34), a valve port (6) through which the back pressure chamber is in communication with the low pressure circuit, a valve seat (7) formed in the valve port (6), an auxiliary valve element (8) selectively engaging with and disengaging from the valve seat (7), a spring (9) pressing the auxiliary valve element to engage with the valve seat (7), and a piston (10) having a first end receiving pressure from the high pressure circuit, and having a second end adapted to urge the auxiliary valve (8) element to disengage from the valve seat (7). The auxiliary valve (8) element is pressed in a radial direction so as to be urged against a portion of the wall of the valve port (6) when the auxiliary valve element is disengaged from the valve seat.
申请人：NABCO LIMITED
地址：1-46 Wakinohamakaigan-dori, Chuoh-ku Kobe JP
国籍：JP
代理机构：Lerwill, John
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