| 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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| 02/28/1978 | US4075850 Striking tool |
| 02/21/1978 | US4074777 Pneumatic impact tool |
| 02/21/1978 | US4074771 Rock drill |
| 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 | US4068728 Hydraulic flow divider for a mining vehicle |
| 12/13/1977 | US4062411 Hydraulic percussion tool with impact blow and frequency control |
| 12/13/1977 | US4062268 Fluid operable hammer |
| 11/29/1977 | US4060139 Underwater gas discharge hammer with gas reservoir |
| 11/22/1977 | US4059279 Hollow percussion drill rod with seal for cleaning fluid inlet tube |
| 10/04/1977 | US4052107 Hydraulic hammers hydraulically driven impactor |
| 09/13/1977 | US4047595 Hydraulic-powered device |
| 08/02/1977 | US4039033 Hydraulic rock drill |
| 07/19/1977 | US4036108 Pressure fluid operated percussion tools |
| 07/12/1977 | US4034817 Impact tool |
| 07/12/1977 | US4034816 Demolition tool |
| 06/14/1977 | US4028995 Hydraulic striking apparatus |
| 05/31/1977 | US4026193 Hydraulically driven hammer system |
| 05/17/1977 | US4023626 Self-adaptive hydraulic rock drill |
| 05/10/1977 | US4022108 Hydraulically operated percussion device |
| 05/03/1977 | US4020747 Hydraulically-operated devices |
| 04/19/1977 | US4018135 Hydraulically powered impact device |
| 03/22/1977 | US4012909 Hammer |
| 03/15/1977 | US4011795 Impact tool |
| 02/08/1977 | US4006783 Hydraulic operated rock drilling apparatus |
| 02/08/1977 | US4006665 Percussion tool |
| 02/01/1977 | US4005637 Hydroacoustic apparatus and valving mechanisms for use therein |
| 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 |
| 11/16/1976 | US3991655 Hydroacoustic apparatus and valving mechanisms for use therein |
| 11/09/1976 | US3990522 Rotary percussion drill |
| 11/09/1976 | US3990351 Pneumatic impact device |
| 10/19/1976 | US3986567 Hydraulic percussive-rotary machine |
| 10/05/1976 | US3983788 Method to minimize the amount of oil in the air exhausted from a pneumatically operated impact motor and an impact motor for carrying out this method |
| 08/17/1976 | US3974885 Pneumatic percussive power tool |
| 07/27/1976 | US3971448 Breaker construction and valve therefor |
| 07/27/1976 | US3971217 Reciprocatable devices |
| 07/20/1976 | US3970110 Safety inlet air valve control arrangement for air powered hand held tool |
| 07/20/1976 | US3969987 Hydroacoustic apparatus and valving mechanisms for use therein |
| 07/20/1976 | US3969984 Hydroacoustic apparatus and valving mechanisms for use therein |
| 07/13/1976 | US3968843 Pneumatic percussion tool having a vibration dampened handle |
| 06/29/1976 | US3965799 Hydraulically operated percussion device |
| 05/11/1976 | US3955478 Hydraulically powered percussion drill |
| 03/23/1976 | US3945442 Hydraulic rock drill with stroke responsive advance |
| 03/09/1976 | US3942322 Device in hydraulic percussion tools |
| 02/24/1976 | US3939925 Throttle valve construction for a percussion tool |
| 02/24/1976 | US3939921 Method and device for damping the movement of a hammer piston |
| 02/03/1976 | US3935789 Reversing valve |
| 01/06/1976 | US3930435 Hydraulically powered actuator |