Invention Grant
- Patent Title: Combination cable bolt system
- Patent Title (中): 组合电缆螺栓系统
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Application No.: US584977Application Date: 1996-01-11
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Publication No.: US5785463APublication Date: 1998-07-28
- Inventor: Jack R. Eaton , Frank Calandra, Jr. , John G. Oldsen
- Applicant: Jack R. Eaton , Frank Calandra, Jr. , John G. Oldsen
- Applicant Address: PA Pittsburgh
- Assignee: Jennmar Corporation
- Current Assignee: Jennmar Corporation
- Current Assignee Address: PA Pittsburgh
- Main IPC: E21D20/02
- IPC: E21D20/02 ; E21D21/00 ; E21D20/00
Abstract:
A tensionable combination cable mine roof bolt is disclosed for use in resin grouted applications. The mine roof bolt includes a rod member having a rotatable bolt head at a first end thereof supporting a bearing plate and a threaded second end spaced from the first end. A coupling threadingly receives the rod member therein. A shearable stop device, such as a shear pin, is positioned within the coupling and adapted to stop the threaded rod member at a first position for rotation of the cable mine roof bolt during installation. After an upper portion of the cable mine roof bolt is secured, the shearable stop mechanism is subsequently sheared by the rod member to allow for tensioning of the cable mine roof bolt. A flexible multi-strand cable is coupled to the coupling device and forms the attachment point for the cable mine roof bolt.
Public/Granted literature
- US5081704A Method of arranging radio control channels in mobile communications Public/Granted day:1992-01-14
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