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1. 发明授权

US06679340B1 Hydraulic tool 失效
标题翻译：液压工具
公开(公告)号：US06679340B1
公开(公告)日：2004-01-20
申请号：US10200143
申请日：2002-07-23
申请人： Tadashi Tatai
发明人： Tadashi Tatai
IPC分类号： F15B1522
CPC分类号： F15B15/1447 , B23D29/002 , B25B27/10 , B25F5/005 , F15B15/149 , F15B2013/006
摘要： In the hydraulic tool, a main body section includes a cylinder and a piston. A head section is attached to the cylinder, includes a movable part. The piston is capable of rotating about the cylinder with the movable part. A control section is provided to the cylinder and includes oil paths and a switching valve. A piston valve reciprocally moves to control communication between a first and a second cylinder chambers. A concave is provided in a bottom face of the cylinder, escapes an end of the piston valve from a position at which the end of the piston valve contacts a bottom face, and shuts off the communication between the chambers. A projection is provided at a position different from the concave, makes the end of the piston valve contact the bottom face and allows the communication between the chambers.
摘要翻译：在液压工具中，主体部分包括气缸和活塞。头部附接到气缸，包括可移动部分。活塞能够利用可移动部件围绕气缸旋转。控制部分设置在气缸上，并包括油路和切换阀。活塞阀往复运动以控制第一和第二气缸室之间的连通。在气缸的底面设置凹部，从活塞阀的端部接触底面的位置离开活塞阀的一端，并且切断室之间的连通。在与凹部不同的位置处设置突起，使得活塞阀的端部接触底面并允许腔室之间的连通。

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