| Patents for B24B 55 - Safety devices for grinding or polishing machines; Accessories fitted to grinding or polishing machines for keeping tools or parts of the machine in good working condition (6,990) |
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| 06/13/1991 | DE3940584A1 Adjustable guard for portable grinder - has encircling metal band with tensioning lever to clamp rim of guard onto neck of grinder |
| 06/11/1991 | US5022190 Portable |
| 05/16/1991 | DE3943546A1 Computer controlled portal frame type polishing machine - has five-axis CNC movement of head with fine pressure control and axial oscillation of MOP |
| 05/08/1991 | EP0425492A1 Hand-held power-tool with enclosed-ventilation drive motor. |
| 04/25/1991 | DE3934914A1 NC portal frame-type polishing machine - has three translation and two rotational axes of movement of polishing |
| 04/16/1991 | US5007206 Dustless drywall sander |
| 04/10/1991 | CN2074698U Dust suction cover |
| 04/09/1991 | US5006685 Machine tool with grinding function and truing/dressing method of grinding stone using it |
| 04/09/1991 | US5005321 Protective hood for grinding machines, particularly angle grinders, and suitable fastening receptacle for the latter |
| 03/21/1991 | DE4021277A1 Hand operated machine tool unit |
| 03/21/1991 | DE3930247A1 Cooling device for circular grinding machine - has cooling medium jet adjusted correspondingly each time grinding disc is sharpened |
| 03/20/1991 | EP0418102A2 Gemstone polishing table |
| 03/06/1991 | EP0415871A1 Dust control system for an abrasive grinder |
| 02/28/1991 | DE3927536A1 Method of removing dust from grinding machine - enclosing belt in housing connected to suction fan |
| 02/27/1991 | EP0413954A2 Protective covering |
| 02/27/1991 | CN2072002U Collecting cover for abrasive cloth machine wood flour |
| 02/12/1991 | US4991358 Grinding machine |
| 01/10/1991 | DE3921125A1 Hand tool device with its own drive - has bent spindle to take angle grinder and power driven fan extractor |
| 01/09/1991 | EP0407339A1 Hand device with a wheel for cutting-off or grinding |
| 01/09/1991 | EP0407337A1 Hand device with a wheel for cutting-off or grinding |
| 01/09/1991 | EP0406247A1 Eccentric grinding machine. |
| 12/27/1990 | EP0404133A2 Device for dry grinding of surfaces |
| 12/20/1990 | DE3919701A1 Powered hand grinding or polishing machine - has cantilevered grinding roll with easy adjustment of guard |
| 12/20/1990 | DE3919649A1 Quick adjusting guard for angle grinder - has clamping ring secured by stud with left and right threaded ends |
| 12/11/1990 | US4976251 Tile saw apparatus and method |
| 11/28/1990 | EP0399973A1 An arrangement in hand-held button-bit grinding machines |
| 11/28/1990 | EP0399950A1 High-rotating machine tool comprising a safety device and security-procedure for such machines |
| 11/28/1990 | EP0399155A1 Belt grinding machine |
| 11/06/1990 | US4967516 Debris collection system for a surface treating tool |
| 10/31/1990 | EP0395255A2 A seal assembly for a wafer grinding machine |
| 10/31/1990 | DE3914312A1 Motor overload detection circuit for hand-tool - compares current and voltage values obtained from current flux angle and motor revs |
| 10/31/1990 | DE3913898A1 Adjustable guard for portable power tools - has indent mechanism for angular adjustment and finger pressure actuated fastening to spindle nose |
| 10/30/1990 | US4965966 Grinding tool body |
| 10/23/1990 | US4964245 Grinding element for a grinding tool body |
| 10/23/1990 | US4964243 Vacuum pole sander |
| 10/10/1990 | EP0391148A2 Polishing or grinding device |
| 10/04/1990 | DE3913378C1 Grinding dust removal system - uses rotating flexible roller pressed against workpiece |
| 10/04/1990 | DE3910752A1 Apparatus for centrifugal working of workpieces |
| 10/04/1990 | DE3910590A1 Cold-gas working apparatus |
| 10/04/1990 | DE3910581A1 Cold-gas working device |
| 10/03/1990 | CN2063065U Dustless pneumatic polisher |
| 09/26/1990 | EP0388972A2 Apparatus for grinding semiconductor wafer |
| 08/28/1990 | US4951426 Grinding fluid feeder apparatus |
| 08/23/1990 | DE4000948A1 Safety system for e.g. automatic machines - have one member moved from position set by second member by force exceeding set level and moved within distance limited by third member |
| 08/22/1990 | CN2060715U Rust removing, rasping and buffing machine without dust |
| 08/01/1990 | CN2059864U Wet type dust-collecting hood for polisher and grinding wheel machine |
| 07/31/1990 | US4944121 Coolant supply nozzle apparatus for slicing machine |
| 07/17/1990 | US4941865 Method and apparatus for forming metallized packaging material |
| 07/11/1990 | EP0377100A1 Vacuum cleaner and dust-free working tool |
| 07/03/1990 | US4937984 Vacuum sander |
| 06/28/1990 | WO1990006834A1 Sanding machine |
| 06/28/1990 | DE3910582C1 Temperature-controlling device |
| 06/22/1990 | CA2006366A1 Sanding machine |
| 06/12/1990 | US4932164 Counterbalance safety guard for a dual action sander |
| 06/12/1990 | US4932163 Dust control system for an abrasive grinder |
| 06/05/1990 | US4930264 Polishing device |
| 05/29/1990 | US4929130 Grinding wheel guard apparatus |
| 05/15/1990 | US4924635 Portable grinder with adjustable protective hood |
| 05/02/1990 | EP0365922A2 Guard for rotary disk tools |
| 05/01/1990 | US4920702 Portable grinder |
| 04/25/1990 | CA2000441A1 Guard for rotary disc tools |
| 04/12/1990 | DE3834362A1 Machine tool with an elastic and dampening fastening of machine parts, such as in particular drive motors, functioning as auxiliary-mass dampeners |
| 03/27/1990 | US4910925 Device for reducing splashing of liquid in a grinding machine |
| 03/22/1990 | DE3831185A1 Belt-grinding (sanding) apparatus |
| 03/06/1990 | US4905434 Aligning and coupling means for trenchduct |
| 03/06/1990 | US4905424 Rotary tool cover |
| 03/06/1990 | US4905421 Disk grinding (sanding) machine |
| 03/06/1990 | US4905420 Grinder with dust exhaust means |
| 03/01/1990 | DE3828450A1 Powered hand tool, in particular angle grinder or the like |
| 02/13/1990 | US4899495 Disc wheel sanding machine |
| 01/25/1990 | WO1990000828A1 Hand-held power-tool with enclosed-ventilation drive motor |
| 01/11/1990 | DE3920960A1 Apparatus for deburring or chamfering a workpiece |
| 12/28/1989 | WO1989012530A1 Sprinkler nozzle arrangement |
| 12/21/1989 | DE3829648A1 Method for producing grooves in cylindrical rolls and grinding machine for carrying out the method |
| 12/20/1989 | EP0346540A1 Coolant processing system |
| 12/20/1989 | EP0213172B1 A displaceable protective cover for handtools provided with rotatable disc-shaped tools |
| 12/14/1989 | DE3818797A1 Device for controlling the drive speed of the grinding disc of a saw-sharpening machine |
| 12/13/1989 | EP0346172A1 Device for reducing the splashing of liquid in a grinding machine |
| 11/23/1989 | EP0342315A2 Machine for deburring work pieces |
| 11/21/1989 | CA1263002A1 Air guard diffuser |
| 10/26/1989 | DE3811197A1 Adaptor device for a machine tool guided by hand |
| 10/24/1989 | CA1262408A1 Sander shield |
| 10/05/1989 | WO1989009114A1 Eccentric grinding machine |
| 09/27/1989 | EP0333710A1 Fixing recess for a protective cover for portable grinders. |
| 09/26/1989 | CA1260717A1 Abrasive surfacing machine |
| 09/06/1989 | EP0331440A1 Cutting, grinding and milling |
| 08/30/1989 | EP0329943A2 Disc sanding tool |
| 08/29/1989 | CA1258772A1 Glass scratch removal apparatus and method |
| 08/02/1989 | EP0244465B1 Portable grinder |
| 07/05/1989 | EP0322626A2 Power grinder with an adjustable protecting hood |
| 07/04/1989 | US4844047 Process for sawing crystal rods or blocks into thin wafers |
| 06/29/1989 | DE3742430A1 Tool-clamping device for hand-held angle grinding machine (angle grinder) |
| 06/22/1989 | DE3827150C1 Dust-collecting device for abrasive cut-off machines |
| 06/22/1989 | DE3741536A1 Brake device for braking rotating machine elements, such as the rotor of a manual angle grinder |
| 06/21/1989 | EP0320640A2 Sanding element for a sanding assembly of a vibration sander |
| 06/21/1989 | CN2039611U Grinding machine for bare face of coil |
| 06/20/1989 | US4839995 Abrading tool |
| 06/14/1989 | EP0319729A2 Sanding device for treating surfaces, especially wooden surfaces |
| 06/08/1989 | DE3739703A1 Method for cooling tools containing diamond material and abrasive material and device for carrying out the method |
| 05/16/1989 | US4830553 Coolant manifold assembly |