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Class Information
Number: 299/85.1
Name: Mining or in situ disintegration of hard material > Cutter tooth or tooth head > Plural heads moving relative to each other
Description: Cutter tooth or tooth head in which at least two of the supporting means operate at different speeds or translate in different directions.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7490911 |
Drive device for rotating and oscillating a tool, and a compatible tool for mining |
Feb. 17, 2009 |
| 7438365 |
Mining device |
Oct. 21, 2008 |
| 7036890 |
Core breaker for an earth strata cutting assembly |
May. 2, 2006 |
| 6944977 |
Drum for an excavator that can be used in particular for the production of vertical trenches in hard or very hard soils |
Sep. 20, 2005 |
| 6612655 |
Mining system and method featuring a bread loaf shaped borehole |
Sep. 2, 2003 |
| 6561590 |
Cutting device with rotating disc |
May. 13, 2003 |
| 6315365 |
Mining machine with core breakers |
Nov. 13, 2001 |
| 6270163 |
Mining machine with moveable cutting assembly and method of using the same |
Aug. 7, 2001 |
| 6247758 |
Longwall coal cutter and loader |
Jun. 19, 2001 |
| 6003953 |
Cutter head with cutting members that rotate relative to each other |
Dec. 21, 1999 |
| 5685615 |
Eccentrically driven percussive tools for treating materials |
Nov. 11, 1997 |
| 5439274 |
Rotary mine boring head having movable links with cutter bits |
Aug. 8, 1995 |
| 5338104 |
Auxiliary cutter for a mining machine having coaxial cutter drums |
Aug. 16, 1994 |
| 5111879 |
Sanitary locking lip split well seal |
May. 12, 1992 |
| 4953916 |
Drive arrangement for driving cutting rolls |
Sep. 4, 1990 |
| 4883134 |
Milling machine for cutting trenches |
Nov. 28, 1989 |
| 4768836 |
Coal shaver |
Sep. 6, 1988 |
| 4627501 |
Borer head with planetary gearing |
Dec. 9, 1986 |
| 4436345 |
Continuous mining machine having contour cutters |
Mar. 13, 1984 |
| 4402371 |
Rotatable drilling head |
Sep. 6, 1983 |
| 4391472 |
Core eliminator for mining, road working or earth moving machinery |
Jul. 5, 1983 |
| 4273383 |
Mineral winning machines |
Jun. 16, 1981 |
| 4189187 |
Mineral mining planer having pivoted floor cutter carrier |
Feb. 19, 1980 |
| 4185876 |
Plural spaced cutter drums on pivotable elongate arm with loading means in the space |
Jan. 29, 1980 |
| 4178040 |
Movable mining planer with direction responsive adjustable cutter depth |
Dec. 11, 1979 |
| 4117897 |
Drill bit |
Oct. 3, 1978 |
| 4027918 |
Longwall coal mining machine with plural cutters on sub-ranging arm |
Jun. 7, 1977 |
| 3995907 |
Underground excavating machine having independently movable half-frames |
Dec. 7, 1976 |
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