公开(公告)号：US4027482A

公开(公告)日：1977-06-07

申请号：US581242

申请日：1975-05-27

申请人： Ferruccio Manzini

发明人： Ferruccio Manzini

IPC分类号： B60T11/20 ,  B60T11/224 ,  F15B7/04

CPC分类号： B60T11/224

摘要： The invention relates to a master-cylinder having a two-part cylinder, one part being of narrower diameter than the other, and a two-part piston slidable in the cylinder. Two pressure chambers are defined by the cylinder and the piston. Advance of the piston reduces the volume of both. One, the high pressure chamber feeds an external pressure system, and is itself fed by the other chamber through a valve system during an initial phase of the piston stroke. In a later phase the feed from the second in the first chamber ceases and instead the second chamber feeds the fluid reservoir through a control valve. Pressure-transmitting means such as a rod is arranged between the high pressure chamber and the control valve to open the control valve when the pressure in the high pressure chamber exceeds a predetermined value. A safety valve is provided downstream the control valve whereby, upon abnormal advance of the piston, terminating communication between the second chamber and the reservoir and again feeding the first chamber from the second chamber. The safety valve is actuated by a force transmitting element upon engagement with an abutment fixed relative to the master-cylinder housing.

摘要翻译： 本发明涉及一种具有两部分气缸，一部分具有比另一部分更小直径的主缸，以及可在气缸中滑动的两部分活塞。 两个压力室由气缸和活塞限定。 活塞的推进减少了两者的体积。 一个，高压室供给外部压力系统，并且在活塞冲程的初始阶段期间，其自身通过阀门系统由另一个室进料。 在稍后阶段，来自第一腔室中的第二腔室的进料停止，而第二腔室通过控制阀供给流体储存器。 压力传递装置如杆被设置在高压腔和控制阀之间，当高压腔中的压力超过预定值时打开控制阀。 安全阀设置在控制阀的下游，由此在活塞异常前进时，终止第二腔室和容器之间的连通，并再次将第一腔室从第二腔室供给。 当与相对于主缸壳体固定的邻接件接合时，安全阀由力传递元件致动。