Rotary sprayer for an automatic dishwasher

A rotary sprayer for an automatic dishwasher which comprises:

• a dishwasher cabinet having a front opening door mounted thereto, said dishwasher cabinet defining an interior washing cavity,
• at least one dish rack supported at a middle portion of said interior washing cavity,
• a fixed spray member disposed above said dish rack, said fixed spray member including a substantially horizontal, elongated tube containing a plurality of nozzles disposed at the bottom of said horizontal tube for spraying water onto the dishes held by said dish rack,
• a motor and pump connected to said horizontal tube for pumping water therethrough, and
• a rotary spray member disposed below said dish rack in the lower portion of the washing cavity, said rotary spray member including:
• a pair of elongated hollow arms each having a plurality of top nozzles disposed on a top portion thereof,
• a pair of end nozzles facing in opposite directions and disposed at a front and a rear side wall of an end portion of said pair of elongated hollow arms, respectively, whereby said top nozzles direct water to said dishes held by said dish rack and the pair of end nozzles function to create a driving force for rotating said rotary sprayer member,
• a pair of rotation converting valves for alternately opening and closing said end nozzles, and
• a cylindrical housing connected to said pair of elongated hollow arms, said cylindrical housing containing:
• an inlet and outlet for introducing and draining water therethrough, respectively, and
• valve driving means toggled for driving said pair of rotation converting valves so that the rotary spray member periodically reverses its rotating
• direction, whereby the dishes held by the dish rack are uniformly cleaned by spraying the surface of the dishes with said fixed and rotary spray members.