发明授权
US07464635B2 Percussion device with a control valve for two alternately striking pistons
失效
具有两个交替冲击活塞的控制阀的打击乐器
- 专利标题： Percussion device with a control valve for two alternately striking pistons
- 专利标题（中）： 具有两个交替冲击活塞的控制阀的打击乐器
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申请号： US10840640申请日： 2004-05-07
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公开(公告)号： US07464635B2公开(公告)日： 2008-12-16
- 发明人: Esa Rantala , Jarmo Heinonen , Antti Koskimäki
- 申请人： Esa Rantala , Jarmo Heinonen , Antti Koskimäki
- 申请人地址： FI Tampere
- 专利权人： Sandvik Mining and Construction Oy
- 当前专利权人： Sandvik Mining and Construction Oy
- 当前专利权人地址： FI Tampere
- 代理机构： Drinker Biddle & Reath LLP
- 优先权： FI20012156 20011107
- 主分类号： F01L25/04
- IPC分类号： F01L25/04 ; F01L25/08
摘要：
The invention relates to a percussion device comprising two percussion pistons alternately making a percussion motion and a control valve for controlling the percussion pistons. The control valve (7) comprises a slide (8) affected by a force so that the slide is generally in a first position, but moves at the end of the percussion motion of the first percussion piston from the first position to a second position and correspondingly back to the first position at the end of the percussion motion of the second percussion piston (4).
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