http://www.freshpatents.com/Tool-driving-or-impacting-dtnewntc173.php USPTO Class 173 - Tool driving or impacting en-us Mon, 30 Jan 2012 13:28:58 -0800 1000 Wednesday Thursday Friday Saturday Sunday 141 31 http://www.freshpatents.com/index.php?rss=true http://www.freshpatents.com/images/freshpatentsnav_rss.gif http://www.freshpatents.com/-dt20120126ptan20120018181.php Mon, 30 Jan 2012 13:28:58 -0800 An output mode switching device includes an output unit, a stationary ratchet gear unit, a spring, at least one block, a case for accommodating the parts mentioned above, and a control device threadedly connected to the case. The output unit includes an output shaft and a first bearing and a... http://www.freshpatents.com/-dt20120126ptan20120018182.php Mon, 30 Jan 2012 13:28:58 -0800 The invention relates to a percussion device having a frame, a tool mounted movable in its longitudinal direction, the percussion device containing a work chamber having a movably mounted transmission piston to compress the tool so that a longitudinal stress pulse is generated to the tool, inlet and outlet channels... http://www.freshpatents.com/-dt20120126ptan20120018183.php Mon, 30 Jan 2012 13:28:58 -0800 A synchronization mechanism of a clutch mechanism includes a drive side contact member and a driven side contact member provided on a drive side clutch member and a driven side clutch member of a clutch mechanism at positions radially inwardly of a drive side clutch portion and a driven side...