Fluid handling – Liquid level responsive or maintaining systems – Washing machine cycle control
Patent
1979-10-11
1981-06-09
Schwadron, Martin P.
Fluid handling
Liquid level responsive or maintaining systems
Washing machine cycle control
137412, 137429, 68207, 68208, 134 57D, 200 34, 200 84R, F16K 3118
Patent
active
042718619
ABSTRACT:
A dishwasher employing a float assembly positioned in a centrally located sump in close proximity laterally and vertically to a horizontally rotating circulation pump impeller inlet area for accurately terminating fill when the liquid level rises slightly above the dynamic prime level thereby enabling lower water usage by eliminating the need to overfill to compensate for inaccuracies in liquid level control. A baffle partially encloses the float to prevent nuisance trips resulting from liquid turbulence in the sump caused by pump operation. A cover is provided over the float mechanism to prevent nuisance trips caused by overspray striking the float. In its preferred form the float assembly comprises a multi-chambered open bottom float portion and an inverted U-shaped stem portion. One end of the U-shaped stem is connected to the float. The free end is slidably supported in a vertical standpipe formed in the bottom of the sump. The free end projects externally from the sump through the standpipe to operatively engage a switch mounted beneath the sump. The switch is operative to enable and terminate liquid fill.
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General Electric Company
Houser H. Neil
Reams Radford M.
Schwadron Martin P.
Walton G. L.
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