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US 4,135,863 AGranted
Impeller for a magnetically coupled pump
AssigneeLittle Giant Corporation
InventorsLee W. Davis, James S. Hollingsworth, Leo L. Roberts
Life of this patent
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Abstract
An improved impeller for a pump of the type wherein the impeller is sealed within a pump housing and driven by a rotating external drive magnet magnetically coupled to an impeller magnet forming a portion of the impeller.
Claims10
An improved impeller for a magnetically coupled pump of the type wherein the impeller is rotatably supported on a shaft disposed within a pump housing and wherein rotation is imparted to the impeller by a rotating drive magnet disposed externally to the pump housing and magnetically coupled to the impeller, the improved impeller comprising:
- a hub mounted on the shaft for rotation thereabout;
- a vane assembly mounted on a forward portion of the hub, the vane assembly having a plurality of vanes extending radially with respect to the shaft for pumping fluid through the pump housing in response to the rotation of the hub;
- an impeller magnet slidably mounted on a rear portion of the hub for coupling with the drive magnet;
- forward stop means supported by the hub for limiting the forward disposition of the impeller magnet on the hub;
- rear stop means supported by the hub for limiting the rear disposition of the impeller magnet on the hub;
- and
- angular positioning means supported by the hub for circularly positioning the impeller magnet on the hub whereby rotation of the impeller magnet via the magnetic coupling between the impeller magnet and the rotating drive magnet rotates the impeller.
4 more elements
Dependencies are inferred from the claim text.