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Class Information
Number: 405/289
Name: Hydraulic and earth engineering > Earth treatment or control > Shoring, bracing, or cave-in prevention > Roof support > Inflatable
Description: Method or apparatus wherein the roof support includes a pliant receptacle which is filled with a fluid under pressure.

Patents under this class:

Patent Number Title Of Patent Date Issued
8424973 Collapsible cushion Apr. 23, 2013
8414226 Mine support grout bags and grout packs Apr. 9, 2013
8246276 Pumpable crib bag assembly and method of installation Aug. 21, 2012
8092121 Free standing support Jan. 10, 2012
8070394 Versatile grout bag type of underground support Dec. 6, 2011
7914238 Free standing support Mar. 29, 2011
7232103 Load-bearing pressurized liquid column Jun. 19, 2007
7004686 Rock bolts with expandable element Feb. 28, 2006
6637159 Load-bearing pressurized liquid column Oct. 28, 2003
6558085 Mine support and method of forming the same May. 6, 2003
6547492 Inflatable mine support Apr. 15, 2003
6394707 Yieldable mine roof support May. 28, 2002
5669739 Prestressing of mine props Sep. 23, 1997
5615979 Mine support bag Apr. 1, 1997
5454866 Grout composition Oct. 3, 1995
5435670 Spacer assembly and method Jul. 25, 1995
5427476 Mine prop headboard Jun. 27, 1995
5308196 Yieldable confined core mine roof support May. 3, 1994
5288178 Preload headboard for an elongate prop Feb. 22, 1994
5149228 Prop preloading apparatus Sep. 22, 1992
5143340 Load support Sep. 1, 1992
4906133 Mining apparatus for utilization in recovering coal Mar. 6, 1990
4773792 System for stabilizing structural elements Sep. 27, 1988
4490076 Underground support devices Dec. 25, 1984
4465405 Method and device for the backfilling of roadway supports in mine and tunnel construction with the aid of support hoses having a hardening filler Aug. 14, 1984
RE30929 Collapsible tunnel liner section and method of lining a tunnel May. 11, 1982
4195111 Load supporting means and the formation thereof Mar. 25, 1980
4167361 Temporary mine roof prop Sep. 11, 1979
4124985 Collapsible tunnel liner section and method of lining a tunnel Nov. 14, 1978
4120164 Underground roadway or tunnel support Oct. 17, 1978
4102138 Method for closing off a mine gallery especially for use to prevent spreading of underground explosions Jul. 25, 1978
4072018 Tunnel support structure and method Feb. 7, 1978
4072015 Borehole aerostatic ground support system Feb. 7, 1978
4036024 Device for closing off a mine gallery especially for use to prevent spreading of underground explosions Jul. 19, 1977
4023372 Means to seal-off portions of underground mines and the like May. 17, 1977
3978675 Mine roof support equipment Sep. 7, 1976
3948057 Portable mine stopping device Apr. 6, 1976
3937025 Inflatable envelope systems for use in excavations Feb. 10, 1976

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