Self-draining pump arrangement

Details Self-draining pump arrangement Self-draining pump arrangement

1985-11-05

1987-04-28

Garrett, Robert F.

Rotary kinetic fluid motors or pumps

With means for re-entry of working fluid to blade set

415 53R, F04D 500

Patent

active

046610413

ABSTRACT:
A self-draining pump comprises a pump housing which bounds an impeller chamber having a central axis that is substantially horizontal in a position of use of the pump and an open end facing in one axial direction. An output passage of the pump housing communicates with a radially outward region of the impeller chamber. An impeller is received in the impeller chamber for rotation about the central axis for impelling fluid from a radially inward region toward the radially outward region of the impeller chamber. A lid includes a mounting portion mounted on the pump housing for closing the open end of the impeller chamber, an inlet portion axially spaced from the mounting portion and bounding an inlet passage which is centered on an inlet axis that is substantially parallel to the axis and offset therefrom by such a distance that a bottom zone of the inlet passage is at an elevation no higher than a bottom zone of the impeller chamber in the position of use, a connecting portion bounding an internal space connecting the inlet passage with a radial section of the impeller chamber which extends from the radially inward region to the bottom zone of the impeller chamber, and a partitioning wall situated in the internal space for delimiting therein a connecting passage leading from the inlet passage to the radially inward region of the impeller chamber, the partitioning wall including at least one aperture of a limited cross section which communicates the bottom zone of the impeller chamber with the bottom zone of the inlet passage for draining fluid from the bottom zone of the impeller chamber when the inlet passage is connected to a drain.

REFERENCES:
patent: 2734460 (1956-02-01), Deters et al.
patent: 3070025 (1962-12-01), Cliborn
patent: 3279386 (1966-10-01), Rupp et al.
patent: 3322071 (1967-05-01), Teter
patent: 3348514 (1967-10-01), Davis
patent: 3898014 (1975-08-01), Meister et al.
patent: 4492516 (1985-01-01), McCoy, Jr.

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