公开(公告)号：EP1944514A2

公开(公告)日：2008-07-16

申请号：EP07123493.4

申请日：2007-12-18

申请人： Clark Equipment Company

发明人： Krieger, Daniel J ,  Kettner, Matthew R

IPC分类号： F15B11/22

CPC分类号： F15B11/22 ,  B62D5/061 ,  B62D5/12 ,  B62D7/142 ,  F15B15/149 ,  F15B15/204 ,  F15B2211/7121

摘要： A piston (302) is disclosed that includes a longitudinal passage (321) disposed between outlets on the opposing faces of the piston, and a radial passage (325) extending from a node with the longitudinal passage to an outlet on the annular wall between opposing piston seals. Check valves (331,333) are disposed in the longitudinal passage between the node and each of the piston faces, such that each of the check valves enables fluid flow from its inlet to the outlet on the annular wall, and block fluid flow from the outlet on the annular wall to the inlet. In the event of pistons in a fluid system becoming out of phase with each other, fluid may be admitted through the inlet of the longitudinal passage and the respective check valve and out a side wall outlet, thereby bypassing the piston to exit via the respective end port, until another, out-of-phase piston or pistons in the system also reach full extension or retraction, automatically returning all pistons in the system to be in phase with each other.

摘要翻译： 公开了一种活塞（302），其包括设置在活塞的相对表面上的出口之间的纵向通道（321）和从具有纵向通道的节点延伸到环形壁上的出口的径向通道（325） 活塞密封。 止回阀（331,333）设置在节点和每个活塞面之间的纵向通道中，使得每个止回阀使流体从其入口流到环形壁上的出口，并阻止流体从出口处流出 入口的环形壁。 在流体系统中的活塞彼此不同相的情况下，流体可以通过纵向通道的入口和相应的止回阀进入侧壁出口，从而绕过活塞经由相应的端部离开 端口，直到系统中的另一个异相活塞或活塞也达到完全伸出或缩回，将系统中的所有活塞自动返回到彼此同相。