초록 ▼

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 shad

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.

대표청구항 ▼

A dishwasher including a dishwasher cabinet having an interior space provided therein; rack means for positioning dishware items within said cabinet interior space; and means for directing jet sprays of cleaning liquid at said items of dishware, said means including: a spray arm comprised of an elon

A dishwasher including a dishwasher cabinet having an interior space provided therein; rack means for positioning dishware items within said cabinet interior space; and means for directing jet sprays of cleaning liquid at said items of dishware, said means including: a spray arm comprised of an elongated hollow member; means rotatably mounting said spray arm within said cabinet interior space for rotation about a central axis transverse to the longitudinal axis of said spray arm; means for causing said cleaning liquid to be circulated under pressure into the interior of said spray arm; a plurality of jet spray openings formed along the length of said spray arm on either side of the axis of rotation thereof; whereby said cleaning liquid passes under pressure out through said jet spray openings to direct washing jet sprays at said dishware items; means for causing said spray arm to continuously rotate in a single direction about said central transverse axis whenever said cleaning liquid is circulated into said spray arm; means for producing oscillation of said spray arm about its longitudinal axis, said means including drive means responsive to said rotation of said spray arm about said central transverse axis to continuously oscillate said spray arm about said longitudinal axis; whereby said spray arm is oscillated by said rotation of said spray arm about said central axis.