| Patents for E21B 1 - Percussion drilling (2,080) |
|---|
| 03/05/1997 | EP0693987B1 Rock percussion mechanism |
| 02/26/1997 | EP0759498A2 Arrangement of an impact sensitive apparatus in a housing |
| 02/26/1997 | EP0759116A1 Reverse percussion device |
| 02/20/1997 | WO1997006348A1 Method for controlled fragmentation of hard rock and concrete by the combination use of impact hammers and small charge blasting |
| 02/20/1997 | CA2235676A1 Method for controlled fragmentation of hard rock and concrete by the combination use of impact hammers and small charge blasting |
| 01/23/1997 | WO1997002113A1 Pneumatic impact tool |
| 01/15/1997 | CN1140228A Controlling system controlled by flow for hydraulic rock drill |
| 12/06/1996 | CA2150997A1 Blasthole drill with drill-through pipe rack |
| 12/04/1996 | CN2241768Y Hammering grab bucket drilling device |
| 10/30/1996 | EP0739691A1 Apparatus for adjusting the stroke of a fluid-actuated percussion device |
| 10/15/1996 | US5564510 Pneumatic drill hammer |
| 09/25/1996 | EP0733153A1 A hydraulic impact motor |
| 09/25/1996 | EP0733152A1 An in-hole rock drilling machine |
| 09/25/1996 | EP0572475B1 Drill head with integral impact hammers |
| 09/11/1996 | EP0706604A4 Impact hammer |
| 09/04/1996 | EP0729555A1 Improved guided mole |
| 08/28/1996 | CN1129965A Impact hammer |
| 08/21/1996 | EP0727562A1 Improved bearing system for a boring machine |
| 08/18/1996 | CA2169330A1 Boring machine |
| 08/08/1996 | DE19502349A1 Mechanism for impact drilling machine with improved rocker pulley action |
| 08/06/1996 | US5542784 Method and means for driving pipes into the ground and cartridge used therefor and for subsequent pipe blasting |
| 07/30/1996 | US5540295 Vibrator for drill stems |
| 06/12/1996 | CN1124513A Rock drill |
| 06/12/1996 | CN1124473A Rock percussion mechanism |
| 05/28/1996 | US5520254 Fluid-actuated impact hammer |
| 05/01/1996 | EP0524280B1 Drop-hammer drive |
| 04/25/1996 | WO1996011775A1 Valve arrangement in a hydraulic percussive rock drill |
| 04/17/1996 | EP0706604A1 Impact hammer |
| 04/11/1996 | DE19509565C1 Cable drill for free fall drill hole with mechanism carried by drive mast |
| 02/28/1996 | EP0499602B1 Linear impact ripper apparatus |
| 02/15/1996 | DE4424079C1 Hydraulic striker hammer mechanism |
| 02/06/1996 | US5488998 Fluid driven down-the-hole drilling machine |
| 01/31/1996 | EP0694675A1 Fixing and clamping tensioning device for a tow rope connected to a boring ram |
| 01/31/1996 | EP0694112A1 Rock drill |
| 01/31/1996 | EP0693987A1 Rock percussion mechanism |
| 01/18/1996 | DE4424080C1 Hydraulic striker hammer fixed to drill rod for earth drilling |
| 01/17/1996 | EP0692612A2 Method for drilling with a drilling tool having an eccentrical mounted shaft |
| 01/11/1996 | DE4424081A1 Hydraulic impact hammer for earth boring operations |
| 01/11/1996 | DE4424078A1 Hydraulic hammer to which boring rod for ground drilling operations can be attached |
| 01/02/1996 | US5479996 Rock drilling device with recoil damper |
| 11/23/1995 | WO1995031629A1 Reverse percussion device |
| 09/13/1995 | CN2207436Y Percussion bore-forming machine |
| 08/30/1995 | CN1107404A Tool and tool receiver used for hand tool device |
| 06/27/1995 | US5427481 Tool bit and tool bit chuck for hand tools |
| 06/22/1995 | WO1995016848A1 An in-hole rock drilling machine |
| 06/22/1995 | WO1995016847A1 A hydraulic impact motor |
| 06/21/1995 | EP0658681A2 Drill hammer |
| 06/16/1995 | CA2138086A1 Pneumatic drill hammer |
| 06/14/1995 | EP0657615A2 Drilling machine with impact device |
| 06/01/1995 | WO1995014878A1 Improved guided mole |
| 06/01/1995 | CA2176121A1 Improved guided mole |
| 05/30/1995 | US5419403 Pneumatic hammer |
| 05/16/1995 | US5415240 Drilling device for a rock drill |
| 05/09/1995 | US5413186 Reverse percussion device |
| 04/27/1995 | DE4404009C1 Fluid-operated impact hammer |
| 04/25/1995 | US5409300 For dislodging of unstable rocks in galleries of subterranean mines |
| 04/19/1995 | EP0648915A1 Rock drilling device |
| 03/21/1995 | US5398772 Impact hammer |
| 03/16/1995 | WO1995002110A3 Impact hammer |
| 02/08/1995 | CN2189199Y Heavy and energy saving hydraulic hammer for drilling |
| 01/19/1995 | WO1995002110A2 Impact hammer |
| 01/19/1995 | DE4323357A1 Screwing apparatus |
| 01/19/1995 | CA2166390A1 Impact hammer |
| 01/18/1995 | EP0634559A2 Fluid driven down-the-hole drilling machine |
| 01/13/1995 | CA2127235A1 Fluid driven down-the-hole drilling machine |
| 01/11/1995 | CN1097235A 锤装置 Hammer device |
| 12/13/1994 | US5372196 Hammer drill device |
| 11/24/1994 | DE4415281A1 Fluid-actuated impact hammer |
| 11/23/1994 | CN2183440Y High-efficiency pneumatic impacting mechanism |
| 11/16/1994 | CN2182872Y Air percussion drilling device |
| 11/09/1994 | EP0623428A2 Pneumatic tool with damping device |
| 10/27/1994 | WO1994024415A1 Control system for percussion drill |
| 10/27/1994 | WO1994024403A1 Rock drill |
| 10/27/1994 | WO1994023906A1 Rock percussion mechanism |
| 10/27/1994 | CA2161128A1 Control system for percussion drill |
| 09/27/1994 | US5350254 Guided mole |
| 09/27/1994 | US5350023 Pneumatic hammer |
| 09/14/1994 | EP0614731A1 Tool and toolchuck for handtools |
| 09/13/1994 | CA2007428C Hydraulic jackhammer |
| 09/07/1994 | CA2116936A1 Tool bit and tool bit chuck for hand tools |
| 08/25/1994 | DE4301095A1 Gas-filled spring element without damping |
| 08/16/1994 | US5337841 Hammer type soil excavating machine |
| 08/04/1994 | DE4312171C1 Hydraulic hammer mechanism for drill |
| 07/20/1994 | CN2172344Y Column drilling tools |
| 07/12/1994 | US5327636 Reversible impact-operated boring tool |
| 06/28/1994 | US5324145 Tool bit and chuck for use in percussion drilling and chiseling |
| 06/14/1994 | US5320459 Tool bit for percussion drilling and chipping and chuck for the tool bit |
| 06/14/1994 | US5320189 Rock drilling device |
| 05/10/1994 | US5310014 Water well drilling accessory, mountable on cable tool water well drilling machinery, to provide for the simultaneous driving of water well casing pipe sections, while concurrently undertaking drilling operations |
| 04/05/1994 | CA1328255C Two-piece downhole drill chuck |
| 03/23/1994 | EP0587675A1 Method and means for driving pipes into the ground and cartridge used therefor and for subsequent pipe blasting. |
| 03/16/1994 | EP0587079A2 Hydraulic impact tool |
| 02/03/1994 | DE4323126A1 Hand operated mechanical auger - has release lever associated with brake to disengage drive when auger strikes object |
| 02/02/1994 | CN2154903Y Impact reverse cycle drilling machine |
| 01/12/1994 | EP0578623A2 Hammer device |
| 01/12/1994 | CN2152898Y Automatic percussion device of driller for bridge foundation |
| 01/12/1994 | CN2152897Y Fully-hydraulic pneumatic down-hole driller |
| 01/11/1994 | US5277264 Hydropneumatic hammer |
| 11/25/1993 | WO1993023653A1 Device for loosening drilling rods |
| 11/09/1993 | US5259464 Percussion mechanism for a drill rod unit |