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专利名称：Hydraulically powered rotary percussive
machines
发明人：Hunt, Clive Wilfred申请号：EP87303630.5申请日：19870424公开号：EP0243194A3公开日：190927
专利附图：
摘要：A single supply line (11) feeds hydraulic fluid under pressure to a hydraulicpercussive machine. The supply line divides into two branches, one (12) leading to apercussion motor, the other (13) leading to a rotation motor. A constant flow device (14)is provided in the line leading to the rotation motor. The constant flow device comprisesa sleeve (16) having a fixed aperture (17) and a variable aperture (20). The opening ofaperture (20) is varied by a spring (18). The opening of the aperture.
申请人：The Steel Engineering Company Limited
地址：144 Main Reef Road Manufacta Township Roodepoort Transvaal ZA
国籍：ZA
代理机构：Leale, Robin George
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