Method of rock bolting and tube-formed expansion bolt

United States of America Patent

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Jan 6, 1987
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N/A
app pub date
Jan 23, 1984
filing date
Mar 9, 1979

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Expired

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Abstract

A tube-formed rockbolt is partly circular in its cross-section and opposite its circular portion (12) it has a deep depression (16-18). Its ends are sealed and its outer end has a hole (44, 45) or a fitting (24) through which the bolt can be supplied with high pressure water that expands the tube to anchor it in the borehole.

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Patent Owner(s)

Patent Owner	Address
ATLAS COPCO AKTIEBOLAG	NACKA

International Classification(s)

E21D:SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAM....

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[Patents Count]

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Inventor Name	Address	# of filed Patents	Total Citations
Romell, Gunnar V R	Djursholm, SE	3	135
Skogberg, Bo T	Handen, SE	8	281

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Method of rock bolting and tube-formed expansion bolt

Number of patents in Portfolio can not be more than 2000

United States of America Patent

06572858

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PATENT NO	4634317
SERIAL NO	06572858
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06572858

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