Mine roof anchor bolt

Details Mine roof anchor bolt Mine roof anchor bolt

1982-05-07

1985-12-03

Grosz, Alexander

Expanded, threaded, driven, headed, tool-deformed, or locked-thr

With means to indicate application of predetermined...

Axially deformable member or portion

411 3, 411429, 411397, 411 82, 405260, F16B 3102, E21D 2002

Patent

active

045563500

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.

REFERENCES:
patent: 2826222 (1958-03-01), Case
patent: 4295761 (1981-10-01), Hansen
patent: 4347020 (1982-08-01), White et al.
patent: 4349299 (1982-10-01), Eny
patent: 4386877 (1983-06-01), McDowell, Jr.

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