Invention Grant
- Patent Title: Yielding bolt and assembly
- Patent Title (中): 产生螺栓和组件
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Application No.: US12873887Application Date: 2010-09-01
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Publication No.: US08721227B2Publication Date: 2014-05-13
- Inventor: John G. Oldsen , Yaokun Wu , Marc W. Lamothe
- Applicant: John G. Oldsen , Yaokun Wu , Marc W. Lamothe
- Applicant Address: US DE Wilmington
- Assignee: FCI Holdings Delaware, Inc.
- Current Assignee: FCI Holdings Delaware, Inc.
- Current Assignee Address: US DE Wilmington
- Agency: The Webb Law Firm
- Main IPC: E21D20/02
- IPC: E21D20/02
Abstract:
A mine roof bolt includes an elongated rod and a polymer coating layer. The elongated rod has a first end and a second end with a protruding portion extending radially outward from the elongated rod. The polymer coating layer covers at least a portion of the elongated rod between the first and second ends. The elongated rod is movable relative to the polymer coating layer in an axial direction. The elongated rod has a first position where the elongated rod has a predetermined axial position relative to the polymer coating layer and a second position where the elongated rod has a displaced axial position relative to the first position.
Public/Granted literature
- US20110052332A1 Yielding Bolt and Assembly Public/Granted day:2011-03-03
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