Thermoplastic pump rotor
AssigneeOzen Corporation
InventorDaniel Hager
Life of this patent
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Abstract
A pump rotor for displacing fluids includes a cover and a bottom part having blades. Both the bottom part and the cover are formed by injection molding of thermoplastic materials, preferably reinforced by fillers. The bottom part and the cover are joined together by welding. The walls of the bottom part and cover are sufficiently thin to replace similar metal parts and to provide maximum benefit of the skin effect resulting from the specific surface qualities of the molded material forming the bottom part and the cover. A mold for molding the bottom part and the cover is equipped with a cap which is angularly and vertically adjustable making it possible for a balancing weight to be fitted on the molded parts. The balancing weight is also angularly adjustable and has an adjustable mass.
Claims8
A pump rotor for displacing fluids, comprising:
- a bottom formed of a first thermoplastic material and having a plurality of blades;
- and
- a cover formed of a second thermoplastic material and connected to the bottom;
- wherein
- the first and second thermoplastic materials are different from each other.
A pump rotor for displacing fluids, the rotor comprising:
- a rotor bottom including a wall and a plurality of blades upstanding from the wall, the blades having an upper edge;
- a cover disposed on and welded to the upper edge of the upstanding blades;
- the bottom including the blades and the cover being injection molded thermoplastic materials, wherein the wall of the bottom, the blades and the cover are molded with a thickness on the order of at most 1 mm in order to benefit from surface qualities of molded material related to the skin effect;
- at least one of the bottom and the cover of the rotor including a balancing weight molded thereon for balancing the bottom and the cover with reference to each other and for thereby balancing the motor.
Dependencies are inferred from the claim text.