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| Number | Title | Issue Date |
| 8181714 | Pneumatic impact piercing tool A reversible, pneumatic ground piercing tool has a tail assembly with exhaust passages therethrough. At least a portion of each exhaust passage angles radially inwardly and ends in discharge ports that communicate with a central hole at the rear end of the tail asse... | 05/22/2012 |
| 7118609 | Motorized tool with suction and dust collection capacity The present invention refers to a motorized tool with suction and dust collection capacity. The tool comprises: means for extracting dust suitable for producing a flow of air; means for collecting dust having a first duct for the entrance of the air, that can be con... | 10/10/2006 |
| 6830113 | Dust suppression guard A dust suppression guard includes a shroud defining an enclosed space. The guard also includes a clamp mounted adjacent a first end of the shroud, a reinforcing member attached to a central portion of the shroud, and a boot attached adjacent a second end of the shro... | 12/14/2004 |
| 6000888 | Quick coupler mechanism for power tool bits A pneumatic impact power tool has a tool body with a bit-receiving axial bore in its end surface. A cap is threaded on the end of the tool body and has an end wall spaced from the end surface to define a cavity and a lobed opening in the cavity matably re... | 12/14/1999 |
| 5293959 | Low pressure system lubrication for a jackhammer A percussive, fluid-activated jackhammer includes a low pressure lubrication system having a liquid lubrication reservoir chamber formed in a bore of the jackhammer, the lubrication chamber being subject to low percussive fluid pressure in a front piston ... | 03/15/1994 |
| 5253961 | Coupling for drilling machine with dust extractor Drilling device with force transmission from a hollow-cylindrical drive member to a tubular shank equipped with a drill bit wherein the drive member (3) is rotatably mounted in a housing (41), with the housing (41) being provided with a port (42) for a su... | 10/19/1993 |
| 4106571 | Pneumatic impact drilling tool A pneumatically operated impact drilling tool for earth drilling, includes a reciprocating hammer, an anvil positioned under the hammer and a feeder tube extending through the hammer. The drilling tool is connected to a string of drilling pipe and high pr... | 08/15/1978 |
