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Class Information
Number: 405/299
Name: Hydraulic and earth engineering > Earth treatment or control > Shoring, bracing, or cave-in prevention > Roof support > Jack > Mobile > Self-advanceable
Description: Method or apparatus wherein the prop is self-propelled.










Sub-classes under this class:

Class Number Class Name Patents
405/300 Paired 12


Patents under this class:
1 2

Patent Number Title Of Patent Date Issued
6991407 Lift cylinder assembly Jan. 31, 2006
5816750 Automatic grid layout system Oct. 6, 1998
5626441 Sliding stabilizer May. 6, 1997
5584611 Roof support for underground excavations Dec. 17, 1996
5567018 Continuous mining linear advance system Oct. 22, 1996
5306099 Mine tunnel support system Apr. 26, 1994
5252006 Mine roof support Oct. 12, 1993
5238330 Displaceable mine roof support assemblies Aug. 24, 1993
5190414 Walking prop for mine tunnels Mar. 2, 1993
5178494 Roof support for underground excavations such as coal mines Jan. 12, 1993
5176474 Mine tunnel support systems Jan. 5, 1993
5133626 Mobile stope support apparatus Jul. 28, 1992
5100263 Mine roof support assembly Mar. 31, 1992
5039257 Mine roof supports Aug. 13, 1991
4906143 Electro-hydraulic control systems Mar. 6, 1990
4860508 Flooring system and method for constructing same Aug. 29, 1989
4836612 Stress control mining method and apparatus Jun. 6, 1989
4797023 Mine roof supports Jan. 10, 1989
4747730 Trestle being displaceable on caterpillar May. 31, 1988
4747729 Movable trestle May. 31, 1988
4639169 Mineral mining installation Jan. 27, 1987
4613256 Supporting frame Sep. 23, 1986
4613257 Hydraulic control arrangement Sep. 23, 1986
4605341 Mine roof support and attachment means therefor Aug. 12, 1986
4600340 Mine roof support unit Jul. 15, 1986
4571127 Advance mechanism for mine roof support units Feb. 18, 1986
4568222 Mine-roof supports Feb. 4, 1986
4552488 Mine roof support system Nov. 12, 1985
4526495 Mine roof support assembly Jul. 2, 1985
4518284 Mine roof supports May. 21, 1985
4465406 Mine roof support unit Aug. 14, 1984
4465407 Fixing bridge Aug. 14, 1984
4453846 Mine equipment Jun. 12, 1984
4440522 Hydraulic control arrangement for a roof support unit of a mineral mining installation Apr. 3, 1984
4427321 Mineral mining installation Jan. 24, 1984
4411559 Mining system Oct. 25, 1983
4402634 Mineral mining installation Sep. 6, 1983
4401399 Two part mine roof support unit Aug. 30, 1983
4390308 Advance mechanism for a mine roof support assembly Jun. 28, 1983
4380410 Mine-roof support Apr. 19, 1983
4379661 Advance mechanism for a mine roof support unit Apr. 12, 1983
4325659 Mineral mining installation Apr. 20, 1982
4324509 Mechanized longwall system for mining Apr. 13, 1982
4313698 Hydraulic shield-type support Feb. 2, 1982
4307982 Mobile mine roof support system Dec. 29, 1981
4256343 Mechanism for advancing continuous mining machine through mining cycle and tramming modes Mar. 17, 1981
4231685 Roof support unit Nov. 4, 1980
4227833 Mineral mining installation Oct. 14, 1980
4217067 Mine roof support assembly Aug. 12, 1980
4132081 Mine roof support Jan. 2, 1979

1 2










 
 
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