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Class Information
Number: 405/291
Name: Hydraulic and earth engineering > Earth treatment or control > Shoring, bracing, or cave-in prevention > Roof support > Jack > Mobile
Description: Method or apparatus wherein the jack is provided with a means which allows it to be moved from place to place.










Sub-classes under this class:

Class Number Class Name Patents
405/295 Cantilevered 36
405/302 Control system 104
405/292 Position restoring 13
405/299 Self-advanceable 73
405/298 Under load advanceable 14
405/293 With canopy extension 38
405/297 With contour following feature 28
405/296 With rubble shield 94


Patents under this class:
1 2 3

Patent Number Title Of Patent Date Issued
8317430 Crawler-type and height adjustment drilling machine for setting roof and side wall anchor bolts and anchor cables Nov. 27, 2012
8215876 Shield cap for a shield-type mining support Jul. 10, 2012
7476058 Mining roof support frame with base skids lifting device Jan. 13, 2009
7331735 Apparatus, system, and method for supporting a gate entry for underground full extraction mining Feb. 19, 2008
7201541 Prop head bearing Apr. 10, 2007
6386640 Oil tank arrangement for mining apparatus and roof bolting equipment May. 14, 2002
6325460 Machine used in connection with underground mining having an operator protective shield Dec. 4, 2001
5938376 Automated temporary roof support, bolter and method Aug. 17, 1999
5816750 Automatic grid layout system Oct. 6, 1998
5685669 Mining roof support Nov. 11, 1997
5584611 Roof support for underground excavations Dec. 17, 1996
5567018 Continuous mining linear advance system Oct. 22, 1996
5564866 Reusable mine and underground roof, floor, and rib support system Oct. 15, 1996
5454669 Yield valve Oct. 3, 1995
5423638 Mine roof supports Jun. 13, 1995
5312206 High lift temporary roof support for mines May. 17, 1994
5306099 Mine tunnel support system Apr. 26, 1994
5284404 Moving steel form system Feb. 8, 1994
5178494 Roof support for underground excavations such as coal mines Jan. 12, 1993
5176474 Mine tunnel support systems Jan. 5, 1993
5156497 Temporary roof support for mines Oct. 20, 1992
5076749 Material handling platform for material transport vehicle Dec. 31, 1991
5073067 Mine roof support Dec. 17, 1991
5026218 Temporary roof support cylinder Jun. 25, 1991
4995783 Material handling platform for material transport vehicle Feb. 26, 1991
4978248 Advanceable mine roof supports Dec. 18, 1990
4940363 Mine roof support assembly Jul. 10, 1990
4934758 Appartaus for mounting ancillary equipment Jun. 19, 1990
4906133 Mining apparatus for utilization in recovering coal Mar. 6, 1990
4892446 Group control means for hydraulic mine-roof supports Jan. 9, 1990
4887935 Method of controlling the movement of a longwall excavation front, especially the face or breast of a coal seam Dec. 19, 1989
4828433 Roof supports May. 9, 1989
4815898 Roof supports Mar. 28, 1989
4812081 Movable consolidating trestle for securing the excavating edge Mar. 14, 1989
4797023 Mine roof supports Jan. 10, 1989
4784532 Mine roof supports Nov. 15, 1988
4773795 Roof cap assembly with supporting cylinders for roof support mechanism Sep. 27, 1988
4755083 Adjustable cap unit Jul. 5, 1988
4749311 Foot element and cooperable strut element for use in a roof support mechanism Jun. 7, 1988
4737051 Mobile mine-roof support Apr. 12, 1988
4732511 Mine roof supports Mar. 22, 1988
4718793 Generator for dynamic loading of a mine lining Jan. 12, 1988
4708531 Pivot connections for use with mine roof supports Nov. 24, 1987
4701079 Pivot connections for use with mine roof supports Oct. 20, 1987
4688968 Chock block skidding device designed for the powered supports used in the mines Aug. 25, 1987
4676697 Movable roof support and bolter system Jun. 30, 1987
4676698 Hydraulic valve control apparatus Jun. 30, 1987
4639169 Mineral mining installation Jan. 27, 1987
4629368 Shield supports suitable for use in mines Dec. 16, 1986
4613256 Supporting frame Sep. 23, 1986

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