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| Number | Title | Issue Date |
| 7814986 | Lubricant system for powered hammer A powered hammer includes a housing, a tool holder coupled to the housing and configured to hold a tool, a motor within the housing, a cylinder disposed within the housing, and a piston slideably mounted within the cylinder. A drive mechanism converts rotary output ... | 10/19/2010 |
| 7413026 | Lubricant system for powered hammer A powered hammer includes a housing, a tool holder coupled to the housing and configured to hold a tool, a motor within the housing, a cylinder disposed within the housing, and a piston slideably mounted within the cylinder. A drive mechanism converts rotary output ... | 08/19/2008 |
| 7401661 | Lubricant pump for powered hammer A vibration reduction and lubricating mechanism for a powered hammer includes a power driven piston in a cylinder that reciprocatingly drives a ram, which repetitively strikes a beat piece, which repetitively strikes a tool received in a tool holder. The vibration r... | 07/22/2008 |
| 7252155 | Percussive power tool with flushing head A power tool (1) having a striking means (5), by which a percussive tool (2) that can be driven at least partially along an axis (A) struck directly and having a flushing bore (4) extending at least partially longitudinally through a tool... | 08/07/2007 |
| 7013986 | Impact tool An impact tool enables a front cover part to be easily attached to and detached from a housing body, with a device having a simplified structure. The front cover part has an annular fastening portion clamped to the outer peripheral surface of a front edge portion of... | 03/21/2006 |
| 4993501 | Hydraulic hammer in particular for use in dusty and/or corrosive environments A hydraulic hammer is provided, suitable for use as a crust-breaker of aluminum electrolysis pots, having a hydraulically actuated beating mass reciprocally movable in a cylindr to strike against a tool, an intake duct with a filter and a one way valve fo... | 02/19/1991 |
| 4553610 | Hydraulic striking machine Improvement to a hydraulic striking machine including among other things a body part and a piston, moving to and fro in the body and being accelerated to strike against a tool. The air current produced is led out of the machine uniformly along the surface... | 11/19/1985 |
| 4290496 | Combination impact and pressure liquid rock drill A conventional type of impact rock drill is modified to include a fluid reservoir, valve and piston arrangement whereby each impact stroke of the driver ejects water at high pressure from the cutter bit, thereby increasing the mechanical cutting through h... | 09/22/1981 |
| 4243110 | Pneumatic percussion drill with exhaust cooling and lubrication of chuck end A pneumatic percussion rock drill includes a muffler casing surrounding the drill cylinder part and sealingly engaged with the drill housing so that exhaust air from the percussion motor flows forward through ports in a forward housing member into a chamb... | 01/06/1981 |
| 4002079 | Breathing protector boot for impactor tools An elastomeric protector boot for covering the lower housing of a hydraulically operated impactor tool characterized by air vents which are adapted to allow free air communication between the interior of the boot while preventing debris from entering the ... | 01/11/1977 |
