| Patents for E21B 1 - Percussion drilling (2,080) |
|---|
| 11/25/1980 | CA1090216A1 Hammer drill with a lockable tool holder |
| 11/11/1980 | US4232752 Method and apparatus for driving pipe |
| 11/11/1980 | US4232748 Spray-assisted pneumatic stone-working apparatus |
| 09/16/1980 | US4222443 Motor-driven hammer drill |
| 08/21/1980 | WO1980001666A1 Pneumatic drill |
| 08/21/1980 | WO1980001665A1 Pneumatic percussion machine |
| 07/29/1980 | US4215297 Electromagnetic percussion appliance |
| 04/16/1980 | EP0010075A1 A demolition tool for breaking solid materials |
| 03/25/1980 | US4194435 Percussion mechanism |
| 03/04/1980 | CA1072836A1 Fluid actuated percussion mechanism |
| 01/08/1980 | US4182421 Pneumatic rock drill |
| 12/25/1979 | US4179983 Hydraulic percussive machines |
| 12/18/1979 | CA1068255A1 Earth auger |
| 10/31/1979 | EP0004946A1 Bore hole hammer, especially down-the-hole hammer |
| 10/30/1979 | US4172411 Hydraulic hammer |
| 10/16/1979 | US4171083 Drilling and driving device |
| 09/04/1979 | CA1061679A1 Hydraulic impact tool |
| 08/28/1979 | US4165788 Hydraulic percussion apparatus |
| 08/21/1979 | CA1060666A1 Pneumatic impact mechanism |
| 07/10/1979 | US4160486 Pneumatic impact mechanism |
| 07/03/1979 | CA1057603A1 Electropneumatic hammer |
| 06/05/1979 | US4157121 Hydraulic powered rock drill |
| 06/05/1979 | CA1055923A1 Auger construction |
| 04/03/1979 | CA1051730A1 Pneumatic hammer |
| 02/13/1979 | CA1048372A1 Device for damping the recoil of a work tool connected to a percussion tool |
| 02/06/1979 | CA1047883A1 Hydraulically driven striking device |
| 12/26/1978 | US4131165 Hammer drill |
| 11/21/1978 | CA1042760A1 Rotary and percussive devices |
| 11/14/1978 | CA1042312A1 Hydraulic percussive machines |
| 10/24/1978 | CA1040943A1 Method and device for damping the recoil of a work tool connected to a rock drilling machine |
| 09/19/1978 | CA1038725A1 Hydraulic percussion device |
| 09/05/1978 | CA1037947A1 Method and apparatus for lubrication of piston-operated drill |
| 09/05/1978 | CA1037798A1 Percussion machine |
| 08/29/1978 | US4109734 Percussion machine |
| 08/29/1978 | CA1037325A1 Rock drill |
| 08/01/1978 | US4103746 Rotary and percussive devices |
| 06/13/1978 | US4094366 Pneumatic percussion machines |
| 05/16/1978 | US4089380 Hammer having fluid biased work member |
| 05/02/1978 | US4087210 Hydraulic pumping device with pneumatic actuation |
| 04/18/1978 | US4084647 Pneumatic percussion hammer |
| 04/18/1978 | US4084486 Hydraulically driven striking device |
| 02/14/1978 | US4073350 Device for damping the recoil of a work tool connected to a percussion tool |
| 02/07/1978 | US4072198 Hydraulic rock drill |
| 01/31/1978 | US4070949 Hydraulic striking apparatus |
| 01/24/1978 | US4069876 Hydraulic percussive machine |
| 01/17/1978 | US4068727 Method and device for damping the recoil of a work tool connected to a rock drilling machine |
| 12/27/1977 | US4064949 Electropneumatic hammer |
| 12/13/1977 | US4062411 Hydraulic percussion tool with impact blow and frequency control |
| 12/13/1977 | US4062268 Fluid operable hammer |
| 10/04/1977 | US4052107 Hydraulic hammers hydraulically driven impactor |
| 08/02/1977 | US4039033 Hydraulic rock drill |
| 06/14/1977 | US4028995 Hydraulic striking apparatus |
| 05/10/1977 | US4022108 Hydraulically operated percussion device |
| 04/19/1977 | US4018291 Pneumatic hammer |
| 04/05/1977 | US4015821 Cable tensioning assembly |
| 02/08/1977 | US4006783 Hydraulic operated rock drilling apparatus |
| 02/08/1977 | US4006665 Percussion tool |
| 12/21/1976 | US3998279 Air manifold and delivery passageways for rock drill |
| 12/07/1976 | US3995703 Electrohydraulically operated portable power tool |
| 12/07/1976 | US3995700 Hydraulic rock drill system |
| 11/16/1976 | US3991835 Pneumatic rock drill with peripheral piston clearance space |
| 10/19/1976 | US3986565 Exhaust means for percussion tool motors |
| 09/14/1976 | US3979944 Hydraulic drill, in particular a rock drill |
| 08/31/1976 | US3977480 Arrangement for exchanging drill bits |
| 08/31/1976 | US3977479 Geological exploration method and apparatus |
| 08/10/1976 | US3973633 Hammer device |
| 07/27/1976 | US3971448 Breaker construction and valve therefor |
| 07/20/1976 | US3969984 Hydroacoustic apparatus and valving mechanisms for use therein |
| 06/29/1976 | US3965799 Hydraulically operated percussion device |
| 06/15/1976 | USRE28859 Rock drill |
| 05/11/1976 | US3955478 Hydraulically powered percussion drill |
| 04/13/1976 | US3949644 Pneumatic-hydraulic pumping device |
| 04/06/1976 | US3948058 Device for soil sampling under water |
| 03/30/1976 | US3947007 Shock and vibration insulator |
| 03/23/1976 | US3945442 Hydraulic rock drill with stroke responsive advance |
| 03/09/1976 | US3942322 Device in hydraulic percussion tools |
| 02/24/1976 | US3939943 Lubrication of piston operated drill with central flushing tube |
| 02/24/1976 | US3939921 Method and device for damping the movement of a hammer piston |
| 02/17/1976 | US3938595 Apparatus and method for driving bulb piles |
| 02/17/1976 | US3938427 Percussion hammer |