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GB1480872A
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Fans comprising a rotor having pivotally mounted blades
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IT1028223B
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Fan with pivoted radial blades - has blades turned from stationary to operating position by centrifugal force
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GB1482700A
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Bladed wheel fans
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FR2254232A5
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Impeller with variable pitch blades - uses centrifugal force to bring blades to active position from rest
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FR2252029A6
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Centrifugal gas compressor rotor - has central section joined by vanes to one half of outer cover
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FR2248731A6
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Centrifugal compressor with control of immersed zone - slinger arms disperse liquid and air mixture in U channel
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FR2246191A5
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Paddle wheel type cooling tower fan - multilayer ring shape built up from zig-zag or otherwise bent strip
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FR2232227A6
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Method of compressing gas using centrifuge - uses water circulating in closed cycle as a pumping agent
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CA864814A
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Procedes et dispositifs a soufflage de lames d'air, notamment pour galeries de mines
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