Blast impellor wheels
AssigneeTilghman Wheelabrator Limited
InventorWilliam Robertson Macmillan
Life of this patent
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Abstract
A blade for use in a blast impellor wheel for use in cleaning castings has both faces identical and symmetrical about its longitudinal axis so that both faces can be used as abrasive throwing faces. The blast impellor wheel comprises two interconnected parallel side plates each of which has a central opening. Opposed pairs of slots are provided in the inner faces of the side plates and these slots are transversely stepped so that protruberances on the side of a blade can abut against the ledges so formed.
Claims11
A blade for use in a blast impellor wheel, said blade being rectangular and having an I-configuration in transverse section, opposed ends, a pair of opposed faces each symmetrical about a longitudinal axis for use as an abrasive throwing face, and a pair of longitudinal side flanges, each of said side flanges being cut away adjacent one end of the blade to define in relief a protuberance of substantially triangular shape with a blunt nose pointing towards the other end of the blade such that upon engagement with a retaining ledge of a side plate of a blast impellor wheel, the cut away portion of each flange mitigating abrasive build-up therebetween.
A blast impellor wheel comprising two interconnected parallel side plates each with an inner and outer-face and each defining a central opening, the pair of side plates also comprising a plurality of opposed pairs of slots in their inner faces, ledges provided by transverse steps extending across the slots, and at least one rectangular blade, said blade being located between one opposed pair of slots and having an I-configuration in transverse section, opposed ends, and a pair of opposed faces each symmetrical about a longitudinal axis for use as an abrasive throwing face depending on the sense of rotation of the wheel, and a pair of longitudinal side flanges, each flange being cut away adjacent one end of the blade to define in relief a protuberance of substantially triangular shape with a blunt nose pointing towards the other end of the blade and for abutting engagement with one of the transverse ledges across the said one opposed pair of slots.
Dependencies are inferred from the claim text.