公开(公告)号：US20030200750A1

公开(公告)日：2003-10-30

申请号：US10409122

申请日：2003-04-09

Applicant: ADVICS CO., LTD.

Inventor： Akihito Kusano ,  Satoshi Ishida

IPC: B60T011/20

CPC classification number: B60T11/20

Abstract: A master cylinder includes a cylinder housing having a cylinder bore, a seal cup disposed inside the cylinder bore, and a piston slidably disposed in the cylinder bore in sliding contact with the seal cup and defining a pressure chamber in cooperation with the housing and the seal cup. The piston includes a connecting passage which fluidly connects the pressure chamber with an atmospheric pressure chamber when the piston is in a retracted position. The seal cup cuts off fluid communication between the pressure chamber and the atmospheric pressure chamber through the connecting passage when the piston moves in its axial direction by a prescribed distance from its retracted position. The connecting passage is a stepped hole having a first end portion with a small diameter which communicates with the pressure chamber and a second end portion with a large diameter which opens onto an outer peripheral surface of the piston. The cross-sectional area of the first end portion is such as to produce a throttling effect.

Abstract translation: 主缸包括具有气缸孔的气缸壳体，设置在气缸孔内的密封杯，以及可滑动地设置在气缸孔中的活塞，其与密封杯滑动接触并且与壳体和密封件协作地限定压力室 杯子。 活塞包括连接通道，当活塞处于缩回位置时，该连接通道将压力室与大气压力室流体连接。 当活塞沿其轴向移动距其缩回位置规定的距离时，密封杯通过连接通道切断压力室和大气压力室之间的流体连通。 连接通道是具有与压力室连通的小直径的第一端部和通向活塞的外周面上的大直径的第二端部的台阶孔。 第一端部的横截面面积为产生节流效果。

公开(公告)号：US20040144248A1

公开(公告)日：2004-07-29

申请号：US10753398

申请日：2004-01-09

Applicant: ADVICS CO., LTD.

Inventor： Satoshi Ishida

IPC: F16J009/00

CPC classification number: F16J15/3268 ,  B60T11/236 ,  F16J15/3216

Abstract: The present invention is directed to a master cylinder provided with an annular seal member (S1) having an annular groove of U-shaped cross section formed on its one end face, and a substantially annular seal retainer (30) for restricting at least axial movement of the seal member, and including a substantially annular lifted wall portion (31) formed to extend axially into the U-shaped annular groove of the seal member, and a substantially annular step portion (32) formed on an inner periphery of the lifted wall portion, for contacting an open end face of the seal member. The seal retainer is reduced in diameter by radial pressing force produced when it is received in a cylinder bore (1), and restored when the pressing force is released. The seal member is placed in an annular hold groove (1d), and the seal retainer is received from an open end of the cylinder bore to be placed in an annular transfer groove (1b), with the seal retainer reduced in diameter. Then, the seal retainer is transferred from the annular transfer groove to an annular hold groove (1c), and the seal retainer is restored in such a state that the lifted wall portion extends into the U-shaped annular groove of the seal member.

Abstract translation: 本发明涉及一种具有环形密封构件（S1）的主缸，该环形密封构件（S1）具有在其一个端面上形成的U形横截面的环形槽和用于至少轴向运动的基本环形的密封保持器（30） ，并且包括形成为轴向延伸到所述密封构件的U形环形槽中的大致环形的提升壁部分（31），以及形成在所述提升壁的内周上的大致环形台阶部分（32） 部分，用于接触密封构件的开口端面。 密封保持器在容纳在气缸孔（1）中时产生的径向按压力减小直径，并且当按压力被释放时恢复。 密封构件被放置在环形保持槽（1d）中，并且密封保持器从缸孔的开口端容纳以放置在环形传送槽（1b）中，密封保持器的直径减小。 然后，将密封保持器从环形传送槽转移到环状保持槽（1c），并且密封保持器恢复到被提升的壁部分延伸到密封构件的U形环形槽中的状态。