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1. 发明授权

US4813833A Threaded fastener having jacketed head 失效
标题翻译：螺纹紧固件有夹头
公开(公告)号：US4813833A
公开(公告)日：1989-03-21
申请号：US529370
申请日：1983-09-06
申请人： Alvin D. Haab
发明人： Alvin D. Haab
IPC分类号： F16B33/00 , F16B39/282
CPC分类号： F16B33/006 , F16B39/282 , Y10S411/903
摘要： A metal threaded fastener is disclosed for use in outdoor or other environments where fastener rust or corrosion are to be discouraged. The fastener includes a metal head adapted for engagement with a torque wrench or the like. The head is covered by a polypropylene jacket. Raised metal protuberances below from a bottom clamping surface of the head. In one embodiment, these protuberances extend at least partly through the polypropylene jacket, but the thin covering layer of polypropylene is displaced from the protuberances during bolt installation. These protuberances provide metal-to-metal contact with a workpiece, and consequently encourage maintenance of a correct axial clamping pressure without over-torquing the mating nut.
摘要翻译：公开了一种金属螺纹紧固件，用于室外或其他不要阻止紧固件锈蚀或腐蚀的环境。紧固件包括适于与扭矩扳手等接合的金属头。头部被聚丙烯护套覆盖。从头部的底部夹紧表面向下突出的金属突起。在一个实施例中，这些突起至少部分延伸穿过聚丙烯护套，但是在螺栓安装期间，聚丙烯的薄覆盖层从突起移位。这些突起提供与工件的金属与金属的接触，并因此促进维持正确的轴向夹紧压力，而不会扭转配合螺母。

2. 发明授权

US4548293A Bin ladder construction 失效
标题翻译：彬梯建筑
公开(公告)号：US4548293A
公开(公告)日：1985-10-22
申请号：US630751
申请日：1984-07-13
申请人： Alvin D. Haab
发明人： Alvin D. Haab
IPC分类号： E06C9/02
CPC分类号： E06C9/02
摘要： A bin ladder construction includes a vertical ladder up the side of a grain storage bin and an inclined ladder from the upper end of the vertical ladder to the peak of the roof of the grain storage bin. Corner pieces of particular shape and configuration interconnect the inclined and vertical ladders. The ladders have hollow rungs open at both ends, and channel members extend through and beyond the ends of a pair of hollow rungs in the vertical ladder and in the inclined ladder. Triangular brackets mount the opposite ends of hand rails to the ends of said channels.
摘要翻译：垃圾箱结构包括一个谷物储物箱侧面的垂直梯子，以及从垂直梯子的上端到粮仓的顶部的倾斜梯子。具有特殊形状和构型的角块将倾斜和垂直梯子相互连接。梯子具有在两端敞开的空心梯级，并且通道构件延伸穿过垂直梯子和斜梯中的一对空心梯级的端部和外侧。三角形支架将手轨的相对端安装到所述通道的末端。

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