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公开(公告)号：EP0104156A2
公开(公告)日：1984-03-28
申请号：EP83850245.8
申请日：1983-09-12
IPC分类号： B25D17/11
CPC分类号： B25D17/11 , Y10S173/02 , Y10S173/03
摘要： A plastic silencer (12) surrounds a compressed air tool (11) and forms an exhaust chamber (27) around the tool. Two exhaust tubes (31, 32) from the chamber (27) are to the greater part situated in the chamber. A number of holes (35, 36) have been drilled near the inlet ends of the tubes. As a result the building up of ice in the inlet is prevented.
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公开(公告)号：EP0104156A3
公开(公告)日：1984-08-22
申请号：EP83850245
申请日：1983-09-12
IPC分类号： B25D17/11
CPC分类号： B25D17/11 , Y10S173/02 , Y10S173/03
摘要： A plastic silencer (12) surrounds a compressed air tool (11) and forms an exhaust chamber (27) around the tool. Two exhaust tubes (31, 32) from the chamber (27) are to the greater part situated in the chamber. A number of holes (35, 36) have been drilled near the inlet ends of the tubes. As a result the building up of ice in the inlet is prevented.
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公开(公告)号：EP0104156B1
公开(公告)日：1987-11-25
申请号：EP83850245.8
申请日：1983-09-12
IPC分类号： B25D17/11
CPC分类号： B25D17/11 , Y10S173/02 , Y10S173/03
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公开(公告)号：EP0168368A1
公开(公告)日：1986-01-15
申请号：EP85850230.5
申请日：1985-07-04
摘要： When drilling deep boreholes with a down-the-hole drill (15), the pressure and the flow of the motive fluid are controlled so that the impact velocity of the piston hammer of the drill is kept within narrow limits independently of the counter pressure in the borehole. For this purpose the quotient of pressure and flow can be held substantially constant.
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