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US 4,785,515 AGranted
Method of making a centrifugal pump
OwnerRussell J. Willetteinventor
Life of this patent
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Abstract
A centrifugal pump and method of making the same. The pump includes a casing having at least one impeller, an axial fluid inlet opening, and an outlet opening of a predetermined area. The impeller has a plurality of radially disposed impeller blades which may be straight or curved, and the circumferential area at the end of the blade tips is equal to the discharge area in the casing at the tips of the blades, and the last two mentioned areas are equal to the outlet opening area. In a multi-stage pump the width of the blades are successively larger.
Claims6
In a method of making a centrifugal pump the combination of steps including:
- (a) providing a pump casing having at least one impeller rotatably mounted therein and an axial fluid inlet opening and an outlet opening of a predetermined area;
- (b) providing the impeller with a plurality of radially disposed impeller blades which have tips, and which are evenly disposed, circumferentially, around the impeller so as to provide a circumferential area at the discharge tips of the blade, and which have decreasing widths radially outward;
- and,
- (c) providing a delivery area, in the casing around the impeller into which the impeller discharges fluid, equal in area to the circumferential area of the impeller at the discharge tips of the blades and equal in area to the predetermined area of the casing outlet opening.
1 more element
Dependencies are inferred from the claim text.