专利名称：Improvements in or relating to pumping
arrangements
发明人：Dring, Eric申请号：EP85304299.2申请日：19850617公开号：EP0169655A1公开日：19860129
专利附图：
摘要：Apparatus for providing a variable supply of water under pressure to anhydraulic ring main pressure fluid circuit in, for example, a coal mine, comprises areciprocating pump (16) in said ring main and an hydraulic reciprocating motor (40) for
driving said pump mechanically coupled to said pump, the motor being operated by avariable displacement pump (46) connected in a closed circuit with said motor.
申请人：Dale (Mansfield) Limited
地址：Rotherham Road, New Houghton Nr. Mansfield, Nottingham GB
国籍：GB
代理机构：Campbell, Iain Angus
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