Invention Grant
- Patent Title: Friction bolt
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Application No.: US15779536Application Date: 2016-11-25
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Publication No.: US10370968B2Publication Date: 2019-08-06
- Inventor: Mieczyslaw Rataj , Peter Young , Bradley Darlington
- Applicant: SANDVIK INTELLECTUAL PROPERTY AB
- Applicant Address: SE Sandviken
- Assignee: SANDVIK INTELLECTUAL PROPERTY AB
- Current Assignee: SANDVIK INTELLECTUAL PROPERTY AB
- Current Assignee Address: SE Sandviken
- Agent Corinne R. Gorski
- Priority: WOPCT/EP2015/078063 20151130
- International Application: PCT/EP2016/078839 WO 20161125
- International Announcement: WO2017/093138 WO 20170608
- Main IPC: E21D21/00
- IPC: E21D21/00
Abstract:
A friction bolt assembly to frictionally engage a bore formed in rock strata includes an elongate tube and an expander mechanism acted on by an anchor mechanism via an elongate bar or cable. A retainer mechanism is mounted to act between the bar or cable and the tube to prevent ejection of the bar or cable from the assembly should the bar or cable break.
Public/Granted literature
- US20180347358A1 FRICTION BOLT Public/Granted day:2018-12-06
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