| 摘要 |
<p>PCT No. PCT/EP90/00316 Sec. 371 Date Oct. 7, 1991 Sec. 102(e) Date Oct. 7, 1991 PCT Filed Feb. 24, 1990 PCT Pub. No. WO90/12193 PCT Pub. Date Oct. 18, 1990.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 suction and/or flushing device. The interior of the drive member (3) is connected with the port (42) by way of holes in its wall and the flow path is provided with means (11, 27, 28, 29, 40, 453, 495, 496) for preventing clogging of the flow path.</p> |
