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Class Information
Number: 405/290
Name: Hydraulic and earth engineering > Earth treatment or control > Shoring, bracing, or cave-in prevention > Roof support > Jack
Description: Method or apparatus wherein an extensible, vertical prop supports the overhead.










Sub-classes under this class:

Class Number Class Name Patents
405/291 Mobile 130


Patents under this class:
1 2

Patent Number Title Of Patent Date Issued
8371658 Apparatus and method for supporting a mine rib Feb. 12, 2013
8215876 Shield cap for a shield-type mining support Jul. 10, 2012
8156694 Support pedestal for supporting an elevated building surface Apr. 17, 2012
8052352 Mine support having a linearly moveable and/or pivoting end plate Nov. 8, 2011
8001733 Adjustable jack post Aug. 23, 2011
7819609 Automated, low profile drilling/bolting module with single button operation Oct. 26, 2010
7717649 Suspending hydraulic pillar May. 18, 2010
7704018 Automated, low profile drilling/bolting module with automated stab jack Apr. 27, 2010
7540693 Method for pillar recovery in chamber-and-pillar working and tubbing unit for pillar recovery Jun. 2, 2009
7503731 Yieldable prop for roof and ground control Mar. 17, 2009
7490440 Support device for a rib Feb. 17, 2009
7438506 Jack for carrying and installing mine panels Oct. 21, 2008
7377727 Mining roof support cylinder corrosion protection apparatus and method May. 27, 2008
7228787 Method for joining the functional parts of hydraulic or pneumatic working devices, and joining connection Jun. 12, 2007
7201541 Prop head bearing Apr. 10, 2007
7080959 Adjustable scaffold shoring accessory Jul. 25, 2006
6991407 Lift cylinder assembly Jan. 31, 2006
6910834 Mine prop Jun. 28, 2005
6395359 Power cylinder non-metallic liner seal assembly May. 28, 2002
6394707 Yieldable mine roof support May. 28, 2002
6334738 Prefabricated metal overcast having a crushable lower section Jan. 1, 2002
6174110 Shoring leg Jan. 16, 2001
6129483 Prefabricated metal overcast having a crushable lower section Oct. 10, 2000
6056480 Support for underground mining and tunnel construction May. 2, 2000
5967702 Quick-release pit prop Oct. 19, 1999
5961254 Hydraulic advancing support frame Oct. 5, 1999
5921714 Device for releasing a screw jack mechanism Jul. 13, 1999
5921718 Prop for use in underground mining or tunnel construction Jul. 13, 1999
5868527 Mine props Feb. 9, 1999
5823718 Pillar bag Oct. 20, 1998
5720581 Support prop Feb. 24, 1998
5611646 Support prop with integrated pressure limiting valve and nailed pipes Mar. 18, 1997
5564866 Reusable mine and underground roof, floor, and rib support system Oct. 15, 1996
5564867 Resilienty compressible support column for use in a mine Oct. 15, 1996
5538364 Yieldable mine post having a double ball and socket configuration Jul. 23, 1996
5413436 Support column May. 9, 1995
5400994 Yieldable roof support system Mar. 28, 1995
5348425 Piston cylinder device with a protective coating and method of producing such a coating Sep. 20, 1994
5318388 Improvement in or relating to a shoring leg: a shoring leg with a latch Jun. 7, 1994
5297901 Individual hydraulic prop with filling/drawing valve and pressure fluid return Mar. 29, 1994
5273378 Support column Dec. 28, 1993
5240354 Flexible telescopic prop for building materials Aug. 31, 1993
5228810 Mine support post Jul. 20, 1993
5215411 Yieldable mine post system Jun. 1, 1993
5205676 Hydraulic steel mine prop Apr. 27, 1993
5178494 Roof support for underground excavations such as coal mines Jan. 12, 1993
5051039 Hydraulic steel mine prop Sep. 24, 1991
5026218 Temporary roof support cylinder Jun. 25, 1991
4749311 Foot element and cooperable strut element for use in a roof support mechanism Jun. 7, 1988
RE32675 Mine stopping and method of and jack for installing same May. 24, 1988

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