专利名称：Control of a hydraulic percussive drilling
device
发明人：KLEMM, GUNTER W.申请号：EP86103012.0申请日：19860306公开号：EP0203282A1公开日：19861203
专利附图：
摘要：1. A hydraulic impact drill device comprising a hydraulic drill hammer (10), thenumber of impact of which can be regulated by means of an actuating pressure, arotating hydraulic motor (47) for rotating the drill rod (50) on which the drill hammer
acts and a hydraulic advancing means (51) to advance the drill rod, the actuating pressurebeing derived from the working pressure of the advancing means (51), characterized inthat the control duct (43) leading the actuating pressure is connected to a shuttle valve(57), which lets through the highest one of several inlet pressures and a first inletpressure of the shuttle valve (57) is derived from the pressure (PV ) of the advancingmeans (51) and a second inlet pressure is derived from the pressure (PD ) of the torquemotor (47).
申请人：ING. GUNTER KLEMM SPEZIALUNTERNEHMEN FUR BOHRTECHNIK
地址：Wintersohlerstrasse D-57489 Drolshagen DE
国籍：DE
代理机构：Selting, Günther, Dipl.-Ing.
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