| Patents for B25D 9 - Portable percussive tools with fluid-pressure drive, e.g. having several percussive tool bits operated simultaneously (2,753) |
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| 08/22/1989 | US4858702 Hydraulic distributor for percussion apparatus driven by an incompressible fluid under pressure |
| 08/22/1989 | US4858300 Method of constructing a shock application device |
| 08/08/1989 | US4854393 Combination air hammer, water stream blaster and liquid mist dust suppressor |
| 08/08/1989 | CA1258211A1 Annular air hammer apparatus for drilling wells |
| 08/01/1989 | US4852664 Hydraulic impact tool |
| 08/01/1989 | US4852663 Hydraulic percussive machines |
| 08/01/1989 | US4852662 Impacting mechanism |
| 07/27/1989 | WO1989006516A1 Percussion tool for surgical instruments |
| 07/25/1989 | US4850437 Single-blow pneumatic percussive tool |
| 07/25/1989 | US4850436 Attached pulverulent and granular material shake-down apparatus |
| 07/18/1989 | CA1257515A1 Reversible percussive action machine |
| 07/11/1989 | US4846288 Hydraulically powered rotary percussive machines |
| 07/11/1989 | US4846287 Impact apparatus |
| 07/06/1989 | DE3801676C1 Striking tool for surgical instruments |
| 06/27/1989 | US4841842 Apparatus for scabbling concrete |
| 06/22/1989 | DE3802033C1 Pneumatic striking instrument for medical purposes |
| 06/20/1989 | US4840236 Hydraulic-pneumatic actuator for impact cutter |
| 06/01/1989 | WO1989004910A1 Control system for a multiple shank impact ripper |
| 05/30/1989 | US4834461 Control system for a multiple shank impact ripper |
| 05/02/1989 | US4825960 Synchronized hydraulic hammer arrangement |
| 04/18/1989 | US4821813 Percussion drilling apparatus |
| 04/18/1989 | US4821683 Portable power tool with improved combustion chamber charging means |
| 04/18/1989 | CA1252676A1 Pneumatic impact tool |
| 04/11/1989 | US4819542 For creating impact pulses |
| 04/04/1989 | US4817737 Hydraulic striking device with impact frequency control |
| 02/07/1989 | US4802787 Electrical control system |
| 01/31/1989 | US4800797 Hydraulic percussion device and method of controlling same |
| 01/25/1989 | EP0300929A1 Hydraulic distributing device for percussion apparatus |
| 12/27/1988 | US4793063 Punch gun |
| 11/15/1988 | US4784228 Impact device |
| 10/26/1988 | EP0287614A1 Method and apparatus for extraction and insertion of embedded articles including bone-related devices |
| 10/12/1988 | CN87217099U Translation hydraulic impinger with accumulator |
| 10/05/1988 | EP0284682A2 Punch gun |
| 09/21/1988 | CN87107566A Control system for an impact ripper |
| 08/31/1988 | EP0280195A2 Percussion apparatus with tool holder |
| 08/18/1988 | DE3802391A1 Device for retrieving pneumatically actuated percussion tools from boreholes |
| 08/10/1988 | EP0277480A2 Manually operable internal-combustion-type impact tool |
| 07/14/1988 | WO1988005115A1 Percussion device |
| 07/05/1988 | CA1238837A1 Hydraulically operated percussive machine and an accumulator therefor |
| 06/30/1988 | WO1988004598A1 Single-stroke percussion device |
| 06/14/1988 | US4750568 Pneumatic rescue tool |
| 06/07/1988 | CA1237635A1 Process and apparatus for vibratory operation of a working piston |
| 06/02/1988 | WO1988003855A1 Single-stroke percussion device |
| 05/24/1988 | US4745981 Hydraulic impact tool |
| 05/19/1988 | WO1988003584A1 Control system for an impact ripper |
| 05/19/1988 | WO1988002246A3 Method and apparatus for extraction and insertion of embedded articles including bone-related devices |
| 05/11/1988 | EP0266408A1 An impact apparatus. |
| 05/05/1988 | WO1988003079A1 Single-stroke percussion device |
| 05/03/1988 | US4741404 Percussion tool utilizing negative pressure |
| 04/21/1988 | WO1988002680A1 Single-stroke percussion device |
| 04/07/1988 | WO1988002246A2 Method and apparatus for extraction and insertion of embedded articles including bone-related devices |
| 04/06/1988 | CN86106704A Hydraulic hammer |
| 03/15/1988 | CA1234021A1 Air-operated reversible percussive action machine |
| 03/02/1988 | CN87201234U Shock mechanism with accumulation of energy |
| 02/24/1988 | EP0256955A1 Method and apparatus for adjusting the percussion parameters of the impacting piston of a non compressible fluid-actuated device |
| 02/16/1988 | US4724911 Hydraulic impact tool |
| 02/10/1988 | CN86202542U Manual hydraulic pick with core valve |
| 02/09/1988 | US4723610 Percussion device |
| 01/20/1988 | CN87204166U Hand hydraulic hammer |
| 01/12/1988 | US4718500 Reversible percussion device for percussion tool |
| 01/07/1988 | EP0153332B1 Method and device for the vibratory operation of a working piston, particularly for working tools |
| 12/29/1987 | US4715265 Process and apparatus for vibratory operation of a working piston, in particular for active working tools |
| 12/15/1987 | US4712379 Manual recycler for detonating impact tool |
| 11/19/1987 | WO1987006870A1 An impact apparatus |
| 11/17/1987 | CA1229269A1 Percussion tool |
| 11/11/1987 | EP0244815A2 Hydraulic-pneumatic actuator for impact cutter |
| 10/28/1987 | EP0243194A2 Hydraulically powered rotary percussive machines |
| 10/27/1987 | US4702147 Engine with pneumatic valve actuation |
| 10/27/1987 | CA1228515A1 Electropneumatic drive system for crust breaking devices and process for operating the same |
| 10/14/1987 | EP0241385A1 Vibrating-blade knife |
| 10/13/1987 | US4699223 Method and device for percussion earth drilling |
| 10/13/1987 | US4698885 Method for installing connecting rod bolts |
| 10/06/1987 | US4697647 Reversible percussive action machine |
| 09/22/1987 | US4694912 Controlled impact power tool |
| 09/16/1987 | EP0236721A2 Hydraulic breaker |
| 09/15/1987 | US4693732 Piston vibrator |
| 09/15/1987 | US4693322 For stamping a workpiece |
| 09/01/1987 | US4690225 Percussive tool |
| 08/05/1987 | CN86202229U Model tc50zx impactor for mould |
| 07/28/1987 | CA1224722A1 Portable power tool with improved combustion chamber charging means |
| 07/21/1987 | US4681172 Cushioning device for use with a pneumatic impact tool or the like |
| 07/02/1987 | WO1987003925A1 Percussion device |
| 07/01/1987 | EP0227576A2 Hydraulic impact tool |
| 06/30/1987 | US4676323 Hydraulically operated percussive machine and an accumulator therefor |
| 06/18/1987 | WO1987003527A1 A pneumatic tool |
| 06/16/1987 | CA1222956A1 Many-uses portable equipment particularly suitable for driving rotating tools, as well as percussion and rotating tools, and percussion tools only |
| 06/02/1987 | US4669553 Percussion tool |
| 05/26/1987 | US4667748 Method of driving an element and an hydraulic impactor |
| 04/21/1987 | US4658913 Hydropneumatic percussive tool |
| 03/31/1987 | US4653596 Percussive air tool |
| 03/24/1987 | US4651833 Pneumatic impact tool |
| 03/11/1987 | EP0214064A1 Method of controlling the movement of the impacting piston of a non-compressible fluid-actuated percussion device, and device therefor |
| 03/10/1987 | US4648467 Pressure fluid operated percussion drilling machine provided with a rotation mechanism |
| 03/03/1987 | US4646854 Hydraulic striking device |
| 02/24/1987 | US4644656 Method and apparatus for disassembly of a spot-welded structure |
| 02/10/1987 | US4641714 Multiuse portable equipment for driving rotating tools, rotating percussion tools and percussion tools |
| 01/21/1987 | EP0209373A2 Air tool with double acting valve |
| 01/13/1987 | US4635531 Hydraulically operated impacting device |
| 01/06/1987 | US4634311 Pavement breaking apparatus |
| 12/30/1986 | US4632190 Pneumatically-operated multi-needle chisel tool |