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Class Information
Number: 299/58
Name: Mining or in situ disintegration of hard material > Hard material disintegrating machines > Rotary cutter head with advance direction coincident or parallel to rotary axis > Machine follows cutter into opening formed thereby
Description: Apparatus in which the entire machine follows the cutting means into the opening being formed by the cutting means as the cutting progresses.

Sub-classes under this class:

Class Number Class Name Patents
299/61 Radially adjustable cutting area 14
299/59 Relatively driven cutters 21
299/62 With percussive-type cutter 11

Patents under this class:

Patent Number Title Of Patent Date Issued
8540319 Bit replacing device for excavating machine Sep. 24, 2013
8534765 Method for introducing a vertical shaft and shaft driving machine Sep. 17, 2013
8523288 Bit replacing device for excavating machine Sep. 3, 2013
7651170 Bore head for microbore operation Jan. 26, 2010
7510025 Boring machine Mar. 31, 2009
7255406 Method for manufacturing track for auger boring machine Aug. 14, 2007
6698844 Earth discharging device for upward-facing shield machine Mar. 2, 2004
6082930 Shield driving machine Jul. 4, 2000
5934761 Boring machine having hydrostatic bearings Aug. 10, 1999
5443305 Tunnelling machine Aug. 22, 1995
5190353 Rock cutting tool having eccentric drive Mar. 2, 1993
5123708 Shield tunnelling machine Jun. 23, 1992
5022789 Method and machine for constructing shafts Jun. 11, 1991
4915543 Existing pipeline renewing method and apparatus therefor Apr. 10, 1990
4848963 Earth pressure shield Jul. 18, 1989
4818026 Shield type tunneling apparatus Apr. 4, 1989
4692062 Shield type tunneling machine Sep. 8, 1987
4571122 Pipe laying apparatus Feb. 18, 1986
4494617 Shaft boring machine Jan. 22, 1985
4494799 Tunnel boring machine Jan. 22, 1985
4480872 Modified strip mining apparatus Nov. 6, 1984
4456305 Shield tunneling machine Jun. 26, 1984
RE31511 Rotary cutterhead for an earth boring machine Jan. 31, 1984
4298230 Tunnelling apparatus Nov. 3, 1981
4193637 Rotary cutterhead for an earth boring machine Mar. 18, 1980
4192556 Tunnel boring machines Mar. 11, 1980
4021075 Excavators May. 3, 1977

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