专利名称：Control valve and a method for a percussion
device with a working cycle involving veral
coupling moments
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发明人：Antti Koskimäki,Markku Keskiniva,Jorma
Mäki,Mauri Esko,Erkki Ahola,Aimo Helin
申请号：US10546245
申请日：20040223
公开号：US07178447B2
公开日：
20070220
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专利附图：
摘要：The invention relates to a control valve, a percussion device and a method of
controlling a working cycle of a percussion device. A percussion device () for breaking rock includes an impact element () controlled by a control valve (). The control valve includes a control element () arranged to control channels () leading to a working pressure surface () of the impact element (). The control element, during a working cycle of the control valve, is arranged to open and clo pressure channels at veral connecting moments so that during one working cycle of the valve, veral impact puls are arranged to be produced.
2050年>重庆主城景点
我和奶奶的关系申请人：Antti Koskimäki,Markku Keskiniva,Jorma Mäki,Mauri Esko,Erkki Ahola,Aimo Helin
地址：Tampere FI,Tampere FI,Mutala FI,Ikaalinen FI,Kangasala FI,Tampere FI
国籍：FI,FI,FI,FI,FI,FI
出国高中生留学代理机构：Drinker Biddle & Reath
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