Mine roof anchor bolt
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Dec 3, 1985
Grant Date -
N/A
app pub date -
May 7, 1982
filing date -
May 7, 1982
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
This specification describes a new anchor or rock nut which is used in association with an anchor bolt to rupture packages of two or more component setting mixtures. The nut is characterized by having a plug of thermosetting resinous material formed in situ which plug may be removed by the anchor bolt when screwed into the nut under the application of a pre-determined force which cause the plug to crumble; however until the predetermined force is reached the nut will cause the bolt to rotate.
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Family
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Cited Art Landscape
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