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Class Information
Number: 299/80.1
Name: Mining or in situ disintegration of hard material > Cutter tooth or tooth head > Adjustable head
Description: Cutter tooth or tooth head in which a portion of the elements" supporting means is relatively movable and maintains the elements in two or more different relative positions whereby the area of the hard material engaged by the tool is selectively variable.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7475947 |
Extendable cutter drum for a boring machine |
Jan. 13, 2009 |
| 7175237 |
Hewing or cutting roll |
Feb. 13, 2007 |
| 6431654 |
Mining machine having an extendable and retractable rotor arm and method of repairing an extendable and retractable rotor arm assembly |
Aug. 13, 2002 |
| 6244664 |
Extendable end assembly for a mine face cutting roller |
Jun. 12, 2001 |
| 6213560 |
Variable width milling drum |
Apr. 10, 2001 |
| 5921632 |
Method and apparatus for extending the cutter drum of a boring machine |
Jul. 13, 1999 |
| 5836658 |
Method and apparatus for boring and shearing of rocks |
Nov. 17, 1998 |
| 5697676 |
Shield tunnel boring machine |
Dec. 16, 1997 |
| 5439274 |
Rotary mine boring head having movable links with cutter bits |
Aug. 8, 1995 |
| 5308150 |
Down reaming apparatus |
May. 3, 1994 |
| 5104262 |
Tunnel boring machine |
Apr. 14, 1992 |
| 5096262 |
Device for enlarging a chimney |
Mar. 17, 1992 |
| 4889392 |
Advance/retreat cutting miner and method |
Dec. 26, 1989 |
| 4875738 |
Arm-supported cutting roll with effective length pivotally adjustable along mining face |
Oct. 24, 1989 |
| 4813749 |
Pilot operated stepping directional valve and method for single line operation |
Mar. 21, 1989 |
| 4778221 |
Movable device for openpit mining |
Oct. 18, 1988 |
| 4708396 |
Coal shaver |
Nov. 24, 1987 |
| 4630869 |
Shield tunneling machine |
Dec. 23, 1986 |
| 4512116 |
Feed-up means for expandable work engaging members |
Apr. 23, 1985 |
| 4507895 |
Radially adjustable internal grinder |
Apr. 2, 1985 |
| 4505518 |
Mineral winning machines |
Mar. 19, 1985 |
| 4489985 |
Cutter drum extension latching mechanism |
Dec. 25, 1984 |
| 4406500 |
Cutting assembly including expanding wall segments of auger |
Sep. 27, 1983 |
| 4386670 |
Boring head with extension elements |
Jun. 7, 1983 |
| 4339153 |
Apparatus for extending and retracting the cutter bars of a boring type mining machine |
Jul. 13, 1982 |
| 4316635 |
Extensible and retraciable rotor arm cutting assembly |
Feb. 23, 1982 |
| 4311344 |
Shield-type tunneling machine with toggle controlled bit plates in cutter disc |
Jan. 19, 1982 |
| 4275927 |
Mineral mining plough with worm adjustable roof cutter |
Jun. 30, 1981 |
| 4239290 |
Hydromechanical planer with cutting and breaking heads |
Dec. 16, 1980 |
| 4199194 |
Control means for a coal plough |
Apr. 22, 1980 |
| 4179161 |
Plough for winning material from a mineral face |
Dec. 18, 1979 |
| 4172616 |
Cutting head with self-contained power source |
Oct. 30, 1979 |
| 4169629 |
Tunneling machine with plural adjustable arms carrying single cutter |
Oct. 2, 1979 |
| 4160566 |
Mining apparatus |
Jul. 10, 1979 |
| 4159149 |
Coal mining auger |
Jun. 26, 1979 |
| 4143919 |
Mining machinery with guideway for relatively movable cutting units |
Mar. 13, 1979 |
| 4141593 |
Coal plane with chain operated turning head |
Feb. 27, 1979 |
| 4119347 |
Coal plough having separately adjustable cutters and flexible fluid power and control lines therefor |
Oct. 10, 1978 |
| 4082362 |
Apparatus for coal mining in-cutting and out-cutting |
Apr. 4, 1978 |
| 4076316 |
Continuous mining machine with laterally movable cutter drum member |
Feb. 28, 1978 |
| 4003602 |
Method and apparatus for in-cutting and out-cutting during coal mining |
Jan. 18, 1977 |
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