Title:
ANCHOR BOLTS AND METHOD FOR FIXING SAME IN DRILL HOLES ESPECIALLY IN FRIABLE ROCK
United States Patent 3430449
Inventors:
Novotny, Rudolf
Schuermann, Fritz
Publication Date:
03/04/1969
Export Citation:
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Assignee:
Rudolf, Novotny
Schuermann, Fritz
Primary Class:
405/259.6
Other Classes:
411/15
International Classes:
E21D20/02; E21D20/00; (IPC1-7): E21D20/00; E21D21/00; F16B13/06
View Patent Images:
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US Patent References:
3302410Rock bolting package usage
3108443Method of fixing anchor bolts in the drill holes
2856680Diaphragm perforating and clamping means
2829502Mine roof bolt installation
2667037Suspension roof support
1971051Structural element
0836673N/A




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