Dishwasher with oscillating rotary spray arm

Details Dishwasher with oscillating rotary spray arm Dishwasher with oscillating rotary spray arm

1978-03-27

1979-11-27

Bleutge, Robert L.

Cleaning and liquid contact with solids

Apparatus

With movably or flexibly mounted spray or jet applying...

134180, 239255, B08B 302

Patent

active

041755758

ABSTRACT:
An arrangement for oscillating a rotating dishwasher spray arm about its longitudinal axis to direct the jet sprays at the dishware items at various differing angles including forward, reverse and vertical inclinations to increase coverage and to improve the jet spray washing action by reducing shadowing. The oscillation is produced by a drive gear and crank mechanism driven by a fixed reaction gear as the spray arm rotates. Jet reaction forces are utilized to rotate the spray arm and are related with respect to the axis of rotation of the spray arm so that the resultant torque causing rotation of the spray arm does not significantly vary as the spray arm is oscillated to insure the proper rotational speed of the spray arm. The frequency of oscillation relative to the frequency of rotation is selected to be such that a number of differing jet spray angles are produced for each rotational position of the spray arm in successive revolutions thereof to minimize shadowing effects. Particular mounting details for the spray arm accommodate the simultaneous rotation and oscillation and allow the supply of washing liquid via the mounting structure.

REFERENCES:
patent: 1223380 (1917-04-01), Garis-Cochrane
patent: 1408077 (1922-02-01), Clinton
patent: 2021962 (1935-11-01), Marsh, Jr.
patent: 2960990 (1960-11-01), Jones et al.
patent: 3361361 (1968-01-01), Schutte
patent: 3538927 (1970-11-01), Wallgren
patent: 3642208 (1972-02-01), Guth
patent: 4013222 (1977-03-01), Travaglio

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