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US 4,264,215 AGranted
Separable blade impeller
AssigneeSybron Corporation
InventorsErwin J. Nunlist, Vincent J. Piarulli, Franklyn J. Amorse
Life of this patent
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Abstract
A symmetrical, balanced, glass coated, four bladed impeller for use in closed vessels having blades arranged so that the impeller may fit through a relatively small manhole even though the effective diameter of the impeller is substantially larger than the manhole.
Claims5
In a impeller for attachment to an agitator drive shaft within a closed vessel having at least one manhole opening, the improvement comprising:
- (a) said impeller being of one piece construction including a hub having a central bore therethrough for attachment to said shaft, and four impeller blades formed integral with and extending outwardly from said hub;
- (b) said blades being grouped in pairs at generally opposite sides of said hub, one blade of each pair being a leading blade in the direction of rotation and the other being a trailing blade, the angle of arc between said leading and trailing blade of each pair being about 50.degree.-70.degree. and the angle of arc between the leading blade of one pair and the trailing blade of the other pair being about 105.degree. to 130.degree.;
- (c) the span of said impeller being greater than the diameter of said manhole;
- and
- (d) the perpendicular distance from the end of the trailing blade of each pair to the leading blade of each pair being shorter than the manhole diameter.
2 more elements
Dependencies are inferred from the claim text.