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Class Information
Number: 405/297
Name: Hydraulic and earth engineering > Earth treatment or control > Shoring, bracing, or cave-in prevention > Roof support > Jack > Mobile > With contour following feature
Description: Method or apparatus wherein the prop includes means permitting the base or roof supporting section to follow irregularities in the surface of the floor or roof as the prop is advanced.










Patents under this class:

Patent Number Title Of Patent Date Issued
7775748 Shield support Aug. 17, 2010
6395359 Power cylinder non-metallic liner seal assembly May. 28, 2002
5961254 Hydraulic advancing support frame Oct. 5, 1999
5348425 Piston cylinder device with a protective coating and method of producing such a coating Sep. 20, 1994
5252006 Mine roof support Oct. 12, 1993
5190414 Walking prop for mine tunnels Mar. 2, 1993
5133626 Mobile stope support apparatus Jul. 28, 1992
5100263 Mine roof support assembly Mar. 31, 1992
5039257 Mine roof supports Aug. 13, 1991
4946316 Method and device for moving a shield-type support trestle Aug. 7, 1990
4662796 Supporting pillar for mines May. 5, 1987
4605341 Mine roof support and attachment means therefor Aug. 12, 1986
4600340 Mine roof support unit Jul. 15, 1986
4568222 Mine-roof supports Feb. 4, 1986
4557635 Shield-type support frame Dec. 10, 1985
4526495 Mine roof support assembly Jul. 2, 1985
4480946 Gob canopy for a mine roof support Nov. 6, 1984
4380410 Mine-roof support Apr. 19, 1983
4348138 Sliding supporting gallery Sep. 7, 1982
4311417 Mine roof support Jan. 19, 1982
4307982 Mobile mine roof support system Dec. 29, 1981
4274764 Mine roof supporting system Jun. 23, 1981
4118939 Mine roof support Oct. 10, 1978
4095432 Mine roof supports Jun. 20, 1978
4094153 Breast roof support system for longwall mining Jun. 13, 1978
4062194 Mine roof supports Dec. 13, 1977
4027489 Mine roof support Jun. 7, 1977
4008578 Pit prop assembly Feb. 22, 1977











 
 
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