| 摘要 |
537,282. -Centrifugal fans. MACHINEFABRIEK GEB. STORK & CO. N.V. Jan. 17, 1940, No. 1060. Convention date, April 27, 1939. [Class 110 (i)] In a centrifugal fan, the impeller blades 5 are of aerofoil form and are fixed at both edges to the disc 1 and a ring 6, the ratio of the width to the mean pitch t of the blades being less than one, while the maximum thickness of the blades is at least 5 per cent of the width l. |
