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Class Information
Number: 405/144
Name: Hydraulic and earth engineering > Underground passageway, e.g., tunnel > Boring > Shield > Door or bulkhead
Description: Method or apparatus including either a movable closure for closing off a portion of the entrance into the shield or a partition adjacent the face of the tunnel which allows the face region to be pressurized.










Patents under this class:

Patent Number Title Of Patent Date Issued
8562254 Door arrangement for a tunneling machine Oct. 22, 2013
8523288 Bit replacing device for excavating machine Sep. 3, 2013
8342776 Mine seal with adhesive Jan. 1, 2013
7665930 Hydraulically powered door and systems for operating same in low-temperature environments Feb. 23, 2010
6955594 Mine door system including an air pressure relief door Oct. 18, 2005
6425820 Mine door power drive system Jul. 30, 2002
6334653 Conveyor device and method of removing material using the conveyor device Jan. 1, 2002
6089791 Tunnel construction method Jul. 18, 2000
5538362 Shield excavator Jul. 23, 1996
5203614 Tunneling machine having liquid balance low flow slurry system Apr. 20, 1993
5180252 Earth pressure system shield process Jan. 19, 1993
5167474 Form for making a permanent concrete mine stopping Dec. 1, 1992
5106163 Method and apparatus for inspecting a forward end portion in a tunneling machine Apr. 21, 1992
4848963 Earth pressure shield Jul. 18, 1989
4846606 Excavated earth and sand transporting apparatus for use in a shield machine Jul. 11, 1989
4844656 Earth pressure shield Jul. 4, 1989
4732427 Head intake for tunnelling machine Mar. 22, 1988
4729693 Tunnel excavator Mar. 8, 1988
4624605 Shield tunneling apparatus Nov. 25, 1986
4478535 Mine stopping with man door and door frame assembly Oct. 23, 1984
4456304 Shield tunneling machine and earth removing apparatus therefor Jun. 26, 1984
4406498 Shield tunneling method and machine therefor Sep. 27, 1983
4370003 Temporary gas seal for gas level drift of an in situ oil shale retort Jan. 25, 1983
4368924 Driving shield Jan. 18, 1983
4332508 Shield for tunneling and mining Jun. 1, 1982
4311344 Shield-type tunneling machine with toggle controlled bit plates in cutter disc Jan. 19, 1982
4254994 Method of an apparatus for gaining access to an underground chamber Mar. 10, 1981
4203626 Articulated boom-dipper-bucket assembly for a tunnel boring machine May. 20, 1980
4068486 Automatic tunnel face hydraulic pressure controlling apparatus in shield type hydraulic tunnel boring system Jan. 17, 1978
4068484 Automatic tunnel face hydraulic pressure controlling apparatus in shield type hydraulic tunnel boring system Jan. 17, 1978
4052859 Method and apparatus of completing slurry shield tunneling at vertical shaft Oct. 11, 1977
4037526 Train tunnel ventilation method and apparatus Jul. 26, 1977
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
3970224 Spoil removal devices for tunnelling machines Jul. 20, 1976
3955373 Tunnelling shields May. 11, 1976











 
 
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