公开(公告)号：US06418717B1

公开(公告)日：2002-07-16

申请号：US09762361

申请日：2001-02-05

申请人： Yannick Frank Theophile Emile Christiaens ,  Loic Jean Bernard Bouyer ,  Patrick Desbois

发明人： Yannick Frank Theophile Emile Christiaens ,  Loic Jean Bernard Bouyer ,  Patrick Desbois

IPC分类号： F15B708

CPC分类号： B60T11/16 ,  F16D25/088

摘要： A hydraulic cylinder has a piston (13) with a seal (21) in sealed sliding contact within a bore (12) to define a working chamber (16) ahead of the piston for the discharge of pressurised fluid from the bore via an outlet (17) when the piston is undertaking working stroke, an inlet (20) is provided into the bore from an associated reservoir to allow connection between the reservoir and the working chamber when the piston is in a fully retracted state for recuperation of fluid from the reservoir to the working chamber. The connection between the reservoir and working chamber is provided via a sleeve (27) in the bore (12) winch includes axially extending grooves (28), the grooves being closed by the piston seal (21) during a working stroke of the cylinder but the ends (30) of the grooves being open when the piston (13) is in a fully retracted condition within the sleeve thus by-passing the piston sleeve to connect the working chamber and reservoir. The sleeve (27) may also have a secondary function of providing an abutment (31) for a return spring (32) which returns the piston to its fully retracted position when an operating pedal (14) associated with the piston (13) is released.

摘要翻译： 液压缸具有活塞（13），其具有在孔（12）内密封滑动接触的密封件（21），以限定活塞前方的工作室（16），用于经由出口（ 如图17所示，当活塞进行工作行程时，当活塞处于完全缩回状态以从储存器中回收流体时，将入口（20）从相关联的储存器提供到孔中，以允许储存器和工作室之间的连接 到工作室。 储存器和工作室之间的连接通过孔（12）中的套筒（27）提供，绞盘包括轴向延伸的凹槽（28），凹槽在气缸的工作冲程期间被活塞密封件（21）封闭，但是 当活塞（13）处于套筒内的完全缩回状态时，槽的端部（30）打开，从而绕过活塞套筒以连接工作室和储存器。 套筒（27）还可以具有辅助功能，该功能为复位弹簧（32）设置一个邻接件（31），当与活塞（13）相关的操作踏板（14）被释放时，弹簧将活塞返回到其完全缩回位置 。