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1. 发明授权

US3835523A Self-straining bolts 失效
标题翻译：自锁螺栓
公开(公告)号：US3835523A
公开(公告)日：1974-09-17
申请号：US33842573
申请日：1973-03-06
申请人： P & O RES & DEV CO LTD
发明人： STANSFIELD F
IPC分类号： B66F3/30 , B25B29/02 , F16B31/04 , F16J1/00 , F16J1/09 , F16J15/32 , B23P11/02
CPC分类号： F16J1/09 , B25B29/02 , F16J15/32 , Y10S411/01 , Y10S411/916 , Y10T29/49874 , Y10T29/5383
摘要： A self-straining bolt includes a shank and a rod of steel or like stiff rigid material which fits with clearance in an axial bore within the shank of the bolt, the bore being closed at one end. A closed cylindrical chamber is secured to the end of the bolt remote from the closed end of the bore, and a piston member which has an overall diameter greater than that of the bore, is fitted in the chamber. The piston member is a close sliding fit in the cylindrical chamber and engages the end of the rod adjacent the chamber. A disc of a resilient material with a hardness in the range of Shore hardness 10 to 100, and preferably 40 to 70, and a thickness of at least 3/8 inch, and preferably at least 1/2 inch, abut the working face of the piston and bears with its periphery against the cylindrical wall of the chamber so as to form a seal. A conduit extends through the wall of the chamber for connecting the chamber to a source of fluid under pressure whereby a pressure can be applied to the piston through the disc to cause the rod to press against the closed end of the bore and strain the shank of the bolt. The disc prevents fluid leaking from the chamber through the space between the piston and the cylindrical wall of the chamber.
摘要翻译：自应变螺栓包括柄和杆或类似硬刚性材料的棒，该刚性材料与螺栓的柄部内的轴向孔中的间隙配合，孔在一端封闭。闭合的圆柱形室被固定到远离孔的封闭端的螺栓的端部，并且具有大于孔的总直径的总直径的活塞构件安装在腔室中。活塞构件在圆柱形腔室中紧密地滑动配合并且接合邻近腔室的杆的端部。硬度在肖氏硬度10〜100，优选为40〜70，厚度为3/8英寸以上，优选为1/2英寸以上的硬度的弹性材料的盘，活塞并且其周边承载在腔室的圆柱形壁上，以便形成密封。导管延伸穿过室的壁，用于将腔室连接到压力源处，由此可以通过盘将活塞压力施加到活塞上，以使杆压靠孔的封闭端，螺栓。该盘防止流体从腔室泄漏通过活塞与腔室的圆柱形壁之间的空间。

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