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公开(公告)号：WO2018160938A1
公开(公告)日：2018-09-07
申请号：PCT/US2018/020611
申请日：2018-03-02
Applicant: B & B STEEL PRODUCTS
Inventor： BUSH, Andrew
Abstract: A pipe jack or jack mechanism. The jack mechanism can include a base structure that can include a substantially vertical support member and a plurality of legs angularly disposed therefrom. An elevation member can be configured to move within the substantially vertical support member. A safety ring that can be generally circular can be disposed about an outer perimeter of the elevation member and can extend outwardly therefrom. An annular lock can be adjustably disposed about the outer perimeter of the elevation member and can be positioned below the safety ring. A stop gap can be positioned between the safety ring and the annular lock. A block cap can be disposed on a bottom portion of the substantially vertical support member to prevent the elevation member from extending beyond an end of the substantially vertical support member.
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