会员体验
专利管家(专利管理)
工作空间(专利管理)
风险监控(情报监控)
数据分析(专利分析)
侵权分析(诉讼无效)
联系我们
交流群
官方交流:
QQ群: 891211   
微信请扫码    >>>
现在联系顾问~
热词
    • 4. 发明申请
    • Roof bolts for use in mines, a method for their production and method for their installation
    • 用于矿山的屋顶螺栓,其生产方法及其安装方法
    • US20050031419A1
    • 2005-02-10
    • US10488544
    • 2002-09-11
    • Kerry DeverPeter Mills
    • Kerry DeverPeter Mills
    • E21D20/02E21D21/00E21D20/00
    • E21D20/025E21D21/0026
    • A roof bolt comprises a shaft for insertion in a hole drilled in a mine roof and a head whereby the bolt may be rotated, the head being offset with respect to the longitudinal axis of the shaft so that when the bolt is rotated by means of its head the shaft is caused to describe a circle of greater diameter than its own diameter, and where the offset is at least 0.08 inch and not more than 0.25 inch. Preferably the offset is from 0.10 to 0.16 inch. The invention includes a method for the production of roof bolts which comprise a shaft for insertion in a hole drilled in a mine roof and a head whereby the bolt may be rotated, the method being characterised by being controlled so that at least 90% of the bolts produced have their head central axis offset with respect to the longitudinal axis of the shaft by an amount of at least about 0.08 inch and not more than about 0.25 inch.
    • 屋顶螺栓包括用于插入在矿井顶部钻孔的轴和头部,由此螺栓可以旋转,头部相对于轴的纵向轴线偏移,使得当螺栓通过其旋转时 使轴头形成一个直径大于其自身直径的圆,偏移量至少为0.08英寸,不超过0.25英寸。 优选偏移为0.10至0.16英寸。 本发明包括一种用于生产屋顶螺栓的方法,该方法包括用于插入在矿井内的孔中的轴和头部,由此螺栓可以旋转,该方法的特征在于被控制,使得至少90%的 产生的螺栓的头部中心轴相对于轴的纵向轴线偏移至少约0.08英寸且不大于约0.25英寸。