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Class Information
Number: 405/259.3
Name: Hydraulic and earth engineering > Earth treatment or control > Rock or earth bolt or anchor > Expandable tube
Description: Subject matter comprising a device having means which permits it to expand after it is inserted into a hole in an earthen formation (e.g., a subterranean roof).










Patents under this class:
1 2 3 4

Patent Number Title Of Patent Date Issued
8651769 Friction bolt Feb. 18, 2014
8152416 Device for expanding and/or evacuating parts of anchors Apr. 10, 2012
8146297 Rapid locking and unlocking device for an attachment plate for a swimming pool shelter roof element Apr. 3, 2012
8100607 Rock anchor Jan. 24, 2012
7927043 Rockbolts made of steel pipes Apr. 19, 2011
7891911 Friction tube anchor and inflation adapter for the latter Feb. 22, 2011
7874380 Method and device for drilling, particularly percussion or rotary percussion drilling, a hole in soil or rock material Jan. 25, 2011
7811031 Device and method for installing a rock bolt and a rock bolt installation rig Oct. 12, 2010
7794179 Rockbolt of high strength steel pipe and method of manufacturing the same Sep. 14, 2010
7780377 Friction stabilizers and roof bolt head markings Aug. 24, 2010
7640998 Excavation apparatus Jan. 5, 2010
7465128 Anchor device with an elastic expansion sleeve Dec. 16, 2008
7381013 Rock bolt post grouting apparatus Jun. 3, 2008
7377724 Method and device for installing a self-drilling expandable rock bolt and a self-drilling rock bolt May. 27, 2008
7367751 Friction rock stabilizer with point anchor May. 6, 2008
7320560 Controlled expansion of rock bolt Jan. 22, 2008
7318689 Method and device for rock bolting Jan. 15, 2008
7270501 Expandable rock bolt and rock bolting system Sep. 18, 2007
7181821 Joining expandable tubulars Feb. 27, 2007
7080697 Method and device for drilling a hole and for securing an anchorage in a bore hole Jul. 25, 2006
7004686 Rock bolts with expandable element Feb. 28, 2006
6935811 Frictional mining bolt Aug. 30, 2005
6829871 Wedge anchor for concrete Dec. 14, 2004
6793444 Mechanical anchor Sep. 21, 2004
6742966 Expansion shell assembly Jun. 1, 2004
6533503 Mortar composition, curable by frontal polymerization, and a method for fastening tie bars Mar. 18, 2003
6257802 Packaging arrangements for rock stabilizer sets Jul. 10, 2001
5997219 Tube-formed expansion rock bolt Dec. 7, 1999
5931606 Stabilizer length coding system Aug. 3, 1999
5827014 Friction rock stabilizer Oct. 27, 1998
5765969 Tubeformed rock bolt Jun. 16, 1998
5649790 Friction rock stabilizer and method for insertion Jul. 22, 1997
5647709 Anchor bolt anchorable by explosive charge Jul. 15, 1997
5599140 Mine roof support system including an expansion anchor with means assisting resin component mixing and method of installation thereof Feb. 4, 1997
5525013 Cable bolt structure and related components Jun. 11, 1996
5387060 Tubular mining bolt Feb. 7, 1995
5297900 Rock stabilizer Mar. 29, 1994
5295768 Friction rock stabilizer Mar. 22, 1994
5192146 Open seam friction rock stabilizer Mar. 9, 1993
5137395 Dynamic earth anchor, and a sleeve therefor Aug. 11, 1992
5052861 Roof bolt with plastic sleeve and mechanical anchor Oct. 1, 1991
5033910 Mechanical expansion anchor shell Jul. 23, 1991
5033909 Coupling for anchor rod and sleeve Jul. 23, 1991
5033911 Barrier plug for a bore Jul. 23, 1991
5018907 Mine roof system May. 28, 1991
5018908 Anchor assembly for a mine roof bolt May. 28, 1991
5011337 Mine roof expansion anchor shell and leaf Apr. 30, 1991
4984937 Rock bolt Jan. 15, 1991
4976571 Anchor device for securing rock bolts Dec. 11, 1990
4969778 Expansion assembly for mine roof bolts utilized in small diameter bore holes Nov. 13, 1990

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