Dry operating screw-type compressor with pneumatically controlled air relief valve
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United States of America Patent
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-
Aug 23, 2011
Grant Date -
Mar 1, 2007
app pub date -
Aug 30, 2006
filing date -
Aug 30, 2005
priority date (Note) -
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status (Latency Note)
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Abstract
A screw-type compressor having a motor driven and dry operating compressor unit. A butterfly valve is disposed in an intake line connected to the suction side of the compressor unit. An adjustment cylinder mechanically shifts the butterfly valve. A pressure line is connected to the pressure side of the compressor unit and, via the interposition of a check valve, is connected to a compressed air system. The pressure line is connected to a pneumatically controlled air relief valve via an air relief line for relief of pressure during idling of the compressor unit. At least during idling, the air relief valve is adapted to be acted upon by the pressure that is effective on the pressure side of the compressor unit.
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