Mine roof supports

专利名称：Mine roof supports

发明人：Philip Dudley,Lewis Robert Bower,Malcolm

Wake

申请号：US05/6839申请日：19760521公开号：US04030308A公开日：19770621

摘要：A mine roof support comprises at least one pair of hydraulically extensiblechock legs connected at upper ends in articulated manner between one or more roofbeams of the support and connected at lower end in articulated manner to one or morebase members of the support, a rigid yoke located at a position spaced from the basemember(s) between and connecting either the pair of chock legs, the yoke containingbetween the chock legs a projecting pin secured in a bearing attached to the yoke, orone of the pairs of chock legs, the yoke containing two projecting pins each pin beingsecured in a bearing attached to the yoke, and the or each pin having a lateral basecontained at one side between abutment surfaces secured to the base member(s) and atthe other to one end of a load applying means, the other end of the load applying meansbeing supported from the base member(s).

申请人：FLETCHER SUTCLIFFE WILD LIMITED

代理机构：Lowe, King, Price & Markva

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