专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

1. 发明授权

US5205676A Hydraulic steel mine prop 失效
标题翻译：液压钢矿
公开(公告)号：US5205676A
公开(公告)日：1993-04-27
申请号：US781223
申请日：1992-01-06
申请人： Robert W. Heiliger
发明人： Robert W. Heiliger
IPC分类号： E21D15/44
CPC分类号： E21D15/44
摘要： A hydraulic steel mine prop having a bottom ram including an outer cylindrical tube with a cylinder foot at one end and a collar ring at the other end, and with a top ram coaxially guided in the bottom ram. The top ram is substantially a cylindrical tube with a piston at its one end, whereby the piston is guided in and sealed relative to the inner wall of the outer cylindrical tube, and with a prop head at its other end. The top ram includes an inner prop extension stop and a return spring formed as a screw spring which is secured with one end to the prop head and with the other end to the cylinder foot. The return spring passes through a bore in the piston, whereby a further tube which encloses the spring, is arranged coaxially between the prop head and the piston. The piston includes a safety valve which relieves the pressure from a compression chamber when the piston assumes a predetermined end position. To simplify operating the safety valve in a positive manner the screw spring is divided into two separate spring members.
摘要翻译： PCT No.PCT / EP91 / 00706 Sec。 371日期1992年1月6日 102（e）日期1992年1月6日PCT 1991年4月13日PCT PCT。 WO91 / 18186 PCT公开号日期：1991年11月28日。一种具有底部柱塞的液压钢矿井支柱，该底部压头包括在一端具有气缸底部的外圆柱形管和另一端的套环，并且具有在底部压头中同轴引导的顶部压头。顶部冲头基本上是一个圆柱形管，其一端具有活塞，由此活塞被引导并相对于外圆柱形管的内壁被密封，并在其另一端具有支柱头。顶部压头包括内部支撑延伸止动件和形成为螺钉弹簧的复位弹簧，螺钉弹簧的一端固定到支柱头部，另一端固定到气缸脚部。复位弹簧通过活塞中的孔，由此将包围弹簧的另一个管同轴地布置在支柱头和活塞之间。活塞包括安全阀，当活塞呈现预定的终止位置时，该安全阀可以减轻来自压缩室的压力。为了简化安全阀的操作，螺杆弹簧被分成两个单独的弹簧部件。

2. 发明授权

US5348425A Piston cylinder device with a protective coating and method of producing such a coating 失效
标题翻译：具有保护涂层的活塞缸装置及其制造方法
公开(公告)号：US5348425A
公开(公告)日：1994-09-20
申请号：US974270
申请日：1992-11-10
申请人： Robert W. Heiliger
发明人： Robert W. Heiliger
IPC分类号： F15B15/14 , B29C69/00 , B29D99/00 , B29K101/10 , E21D15/44 , F16J1/01 , F16J10/00 , F16J10/04 , E21D15/52 , E02D5/60
CPC分类号： F16J10/04 , E21D15/44 , F05C2203/0882 , F16F2226/02
摘要： A method is described for protecting piston cylinder devices against corrosion by a pressure resistant thermoset or cured material coating. At least the outer and inner cylindrical surfaces, for example, of a mine prop, that cooperate with a sealing device, are coated with a three-dimensionally cross-linked, cured or thermoset material having a sufficient thickness on the one hand for providing the intended protection against corrosion and on the other hand to avoid excessive radially directed elastic deformations of the coating. An additive is included in the coating to improve the dry lubricating characteristics, and thus the cooperation between the coating and the sealing devices. The three-dimensionally interlinked thermoset material fills all surface irregularities so that gas and water pockets, for example, in a mine prop, are avoided.
摘要翻译：描述了一种用于通过耐压热固性材料或固化材料涂层来保护活塞筒装置免受腐蚀的方法。至少与密封装置配合的矿井支柱的外圆柱形表面和内圆柱形表面涂覆有三维交联的固化或热固性材料，一方面具有足够的厚度，以提供旨在防止腐蚀，另一方面避免涂层的径向径向弹性变形。涂层中包含一种添加剂，以改善干性润滑特性，从而提高涂层与密封装置之间的配合。三维互连的热固性材料填满了所有的表面凹凸，避免了例如矿井中的气体和水分。

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式