| Patents for B23B 51 - Tools for drilling machines (12,490) |
|---|
| 12/06/1988 | US4789280 Tooling assembly for automatic tool changing |
| 12/06/1988 | US4789276 Twist drill for tough plastics |
| 12/01/1988 | WO1988009245A1 Torque-transmitting device for hand-held power tools |
| 11/23/1988 | EP0292455A2 Drill |
| 11/23/1988 | EP0291563A2 Deburring tool for holes |
| 11/23/1988 | CN88203889U Step type twist drill |
| 11/17/1988 | EP0290520A1 Twist drill. |
| 11/09/1988 | EP0289988A1 Rotating tool for undercutting in a drill hole |
| 11/09/1988 | EP0289651A1 Insert boring tool |
| 11/08/1988 | US4782730 Straddling gasket cutter |
| 11/02/1988 | EP0288614A1 Combination drilling and dressing bit |
| 10/26/1988 | EP0287711A2 Drilling and milling tool |
| 10/25/1988 | US4779440 Extrusion tool for producing hard-metal or ceramic drill blank |
| 10/20/1988 | WO1988007905A1 A drill |
| 10/13/1988 | DE3709647A1 Drilling tool provided with internal cooling passages and having at least two flutes |
| 10/12/1988 | EP0285774A1 Device to bore holes with undercut |
| 10/11/1988 | US4776732 Drill with disposable inserts |
| 10/11/1988 | US4776241 Cutting tool |
| 10/06/1988 | WO1988007352A1 Cranial perforator |
| 10/05/1988 | EP0284745A2 Coupling between a tool head and a tool carrier |
| 09/28/1988 | EP0283698A2 Internally cooled drilling tool with helical grooves and a clamping shaft |
| 09/28/1988 | CN87216305U Internal cooling drill bit with dismantling cutter and blade |
| 09/28/1988 | CN87212416U Adjustable single-sided cutting rough and finish drill bit without refacing |
| 09/22/1988 | WO1988006933A1 Screw tap with lubrication and extraction bores |
| 09/22/1988 | DE3708080A1 Drilling tool |
| 09/14/1988 | EP0281997A1 Rock drill |
| 09/13/1988 | US4770571 Drill |
| 09/07/1988 | EP0280835A1 Hollow drill tool |
| 09/06/1988 | US4768901 Drill having two or more cutting edges comprising exchangeable cutting members |
| 09/06/1988 | US4768599 Drill bit for undercutting a blind bore |
| 09/01/1988 | DE3705717A1 Box countersink or hollow drill bit and production process for this |
| 08/30/1988 | US4767245 Annular hole cutter |
| 08/25/1988 | WO1988006070A1 Undercutting drill |
| 08/23/1988 | US4765418 Borehole drill construction |
| 08/18/1988 | DE3803910A1 Drill bit |
| 08/17/1988 | EP0278288A1 Drilling tool for working materials producing long chips |
| 08/09/1988 | US4762445 Composite sintered twist drill |
| 08/09/1988 | US4762444 Screw tap with lubrication and extraction bores |
| 08/09/1988 | US4761844 Combined hole making and threading tool |
| 08/03/1988 | EP0276310A1 Diamond drill for working hard brittle materials |
| 08/02/1988 | US4760643 Hole saw |
| 07/28/1988 | WO1988005361A1 Combined hole making and threading tool |
| 07/27/1988 | CN87103520A Method of and apparatus for thread mill drilling |
| 07/26/1988 | US4759667 Twist drill for drilling printed circuit board laminates and having an drill point geometry |
| 07/20/1988 | EP0275032A1 Method and device for producing an undercut bore hole in a mounting base |
| 07/19/1988 | US4758120 For making annular holes |
| 07/12/1988 | US4756650 Twist drill |
| 07/12/1988 | US4756649 Counterbore for the bilateral attachment of plane surfaces to bolt holes |
| 07/12/1988 | CA1239040A1 Drill bit for hand-held drilling machines |
| 07/05/1988 | US4755088 Hole saw unjamming tool |
| 07/05/1988 | US4755087 Hole saw plug ejector |
| 06/30/1988 | WO1988004588A1 Hole saw |
| 06/30/1988 | WO1988004584A1 Method of and tool bit for making a hole and a hole-surrounding flange in the wall of a workpiece |
| 06/28/1988 | US4753562 Drill screw |
| 06/28/1988 | US4753558 Installation drill |
| 06/21/1988 | US4752088 Tool adapter assembly and extended compression/tension tap driver |
| 06/16/1988 | DE3737746A1 Drilling tool |
| 06/09/1988 | DE3640870A1 Appliance for making wall recesses |
| 06/07/1988 | US4749315 Tool for cutting a hole in a construction material precisely concentric to a reference aperture |
| 06/02/1988 | WO1988003849A1 Twist drill |
| 06/01/1988 | EP0269039A2 Lathe for machining rotationally symmetric work pieces on the outside |
| 06/01/1988 | DE3640929A1 Anchor for setting in ground bores |
| 05/17/1988 | US4744705 Twist drill bit |
| 05/17/1988 | US4744704 Drill |
| 05/11/1988 | DE3637456A1 Hollow drill bit |
| 05/04/1988 | CN87211049U Combined drill head capable of completing drilling by one operation |
| 05/03/1988 | US4741651 Hole saw |
| 04/27/1988 | EP0264657A1 Boring tool with an exchangeable delivery helix |
| 04/27/1988 | EP0264599A1 Boring tool |
| 04/21/1988 | DE3630403A1 Cutting tool |
| 04/20/1988 | CN87209720U High speed ringlike hole drill |
| 04/07/1988 | DE3636798A1 Method for the production of one-piece sintered cutting tools with a shank |
| 04/05/1988 | US4735528 Spot weld removing tool |
| 04/05/1988 | US4734972 Tube plug removal machine |
| 03/22/1988 | US4732514 Device for use in reshaping the gate of a metal mould for plastic injection moulding |
| 03/17/1988 | DE3735543A1 Shuttering installation drill and its method of manufacture |
| 03/17/1988 | DE3630706A1 Drilling tool |
| 03/15/1988 | US4730395 Apparatus for cutting holes for electrical wall outlets in wall covering panels |
| 03/15/1988 | CA1234001A1 Drill for generating a hole in a work piece |
| 03/10/1988 | DE3629034A1 Single-lip drill |
| 03/09/1988 | EP0258660A1 Single-lip solid drill |
| 03/08/1988 | US4729699 Device for performing spot-facings, in particular at the non-accessible end of through-holes |
| 03/02/1988 | EP0257372A1 One-piece metal-cutting tool |
| 03/01/1988 | US4728231 Drill bit structure |
| 03/01/1988 | CA1233347A1 Printed circuit board drill and method of manufacture |
| 02/25/1988 | WO1988001214A1 Self-centering drill bit with pilot tip |
| 02/16/1988 | US4725175 Groove point screw |
| 02/16/1988 | US4725171 Drill for aramid composites |
| 02/16/1988 | US4724728 Carbide body embedded with abrasive |
| 02/11/1988 | DE3626523A1 Drill, in particular for drilling wood and wooden materials |
| 02/11/1988 | DE3626063A1 Appliance for producing wall apertures |
| 02/10/1988 | CN86210518U Drill-reamer-combined cutting tool |
| 02/10/1988 | CN86210153U Straight shank twist drill with antisliding chute |
| 02/09/1988 | CA1232478A1 Collet chuck |
| 02/03/1988 | EP0255120A1 Device for making recesses in walls |
| 02/02/1988 | US4722644 Multi-lip drill |
| 01/28/1988 | DE3624617A1 Drilling tool |
| 01/27/1988 | CN87200122U A material partially returnable drill |
| 01/20/1988 | CN87203994U Four-blade four-point guiding boring apparatus |
| 01/19/1988 | US4720218 Combination drilling and dressing bit |