Rotary suction and blowing machine
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United States of America Patent
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Jul 14, 1998
Grant Date -
N/A
app pub date -
Jan 2, 1997
filing date -
Feb 21, 1996
priority date (Note) -
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status (Latency Note)
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Abstract
The invention relates to an improved suction and blowing machine comprising an impeller provided with blades which rotate internally of an annular channel afforded in a body. The annular channel comprises a first tract having a transversal section which is greater than that of the blades, and is constituted by two communicating semichannels. The annular channel extends from an intake mouth to a delivery mouth and is provided with a peripheral wall facing external peripheral edges of the blades which peripheral wall bears a cusp-section projecting element extending over an entire length of the first tract of the peripheral wall and creates thereon two concave surfaces.
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