Cleaning and liquid contact with solids – Apparatus – With means for collecting escaping material
Patent
1975-10-28
1976-11-02
Bleutge, Robert L.
Cleaning and liquid contact with solids
Apparatus
With means for collecting escaping material
134176, B08B 302
Patent
active
039890546
ABSTRACT:
A dishwasher has upper and lower spray arms, a telescoping spray tower and a filtering system which includes a frusto-conical screen cage, the outside of which connects to a dishwasher sump by way of a tangential channel including a drain opening therefrom. The inside of the cage connects to the inlet of a double outlet, centrifugal, recirculation pump. Particulates are filtered from recirculating dishwashing fluid on the outside of the screen as the fluid swirls around the cage in a clockwise direction. The tangential approach of the fluid sets up centrifugal forces as an aid in removing filtered particulates from the outside of the screen. A backwash spray rotates in a counterclockwise direction on the inside of the cage to keep the particulates from sticking to the screen. The pump volute is divided into two predetermined volumes rotated with respect to one another to produce two distinct cutoff points and outlets. One outlet supplies the spray arms and tower while the other outlet supplies the backwash spray.
REFERENCES:
patent: 2657695 (1953-11-01), Walker
patent: 3077200 (1963-02-01), Guth
patent: 3090391 (1963-05-01), Kaldenberg et al.
patent: 3126025 (1964-03-01), Aubert et al.
patent: 3129711 (1964-04-01), Schmitt-Matzen
patent: 3491780 (1970-01-01), Kaldenberg
patent: 3542594 (1970-11-01), Smith et al.
patent: 3575185 (1971-04-01), Barbulesco
patent: 3810480 (1974-05-01), Smith et al.
Bleutge Robert L.
General Motors Corporation
Ritchie Frederick M.
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