Dishwashing machine provided with control mechanism

• US 3,203,436 A
• Filed: 02/25/1964
• Issued: 08/31/1965
• Est. Priority Date: 02/25/1963
• Status: Expired due to Term

• Current Assignee: Ake Wallgren Harald Anton, Vilhelm Lovgren Kjell Ake
• Original Assignee: Ake Wallgren Harald Anton, Vilhelm Lovgren Kjell Ake
• Inventors: AKE WALLGREN HARALD ANTON, VILHELM LOVGREN KJELL AKE
• Application Number:
  US04/347,178
• Time in Patent Office: 553 Days
• US Class Current: 134/58.00D
• CPC Class Codes: A47L 15/0055 Metering or indication of used products, e.g. type or quantity of detergent, rinse aid or salt; for measuring or controlling the product concentration
• CPC Class Codes: A47L 15/30 by rotating only
• CPC Class Codes: A47L 15/4289 Spray-pressure measuring or regulating arrangements nozzles A47L15/4278
• CPC Class Codes: A47L 15/44 Devices for adding cleaning agents; Devices for dispensing cleaning agents, rinsing aids or deodorants
• CPC Class Codes: A47L 15/46 Devices for the automatic control of the different phases of cleaning ; Controlling devices A47L15/449 takes precedence

Claims

1. DISHWASHING APPARATUS COMPRISING A COMPARTMENT FOR DISHES TO BE WASHED HAVING A DRAIN OUTLET AT THE BOTTOM THEREOF, FIRST VALVE MEANS FOR ADMITTING LIQUID INTO SAID COMPARTMENT, MECHANISM COMPRISING A SECOND VALVE MEANS FOR CLOSING SAID DRAIN OUTLET TO RETAIN LIQUID IN SAID COMPARTMENT, A DRIVE MOTOR, MEANS OPERATED BY SAID DRIVE MOTOR FOR CIRCULATING LIQUID THROUGH SAID COMPARTMENT AND FOR UTILIZING SAID CIRCULATING LIQUID TO WASH THE DISHES THEREIN, SEQUENCE CONTROL MEANS FOR CONTROLLING OPERATION OF SAID FIRST AND SECOND VALVE MEANS AND SAID MOTOR, SAID SEQUENCE CONTROL MEANS INCLUDING A FIRST SWITCH TO ENERTIZE SAID FIRST VALVE MEANS FOR ADMITTING LIQUID TO SAID COMPARTMENT AND A SECOND SWITCH TO ENERGIZE SAID DRIVE MOTOR AND SUBJECT THE DISHES TO A PRELIMINARY WASHING ACTION FOR AN INTERVAL OF TIME REPRESENTING A PRE-RINSE PERIOD DURING WHICH SAID DRAIN OUTLETS IS OPEN AND LIQUID CAN FLOW FROM SAID COMPARTMENT, SAID SEQUENCE CONTROL MEANS INCLUDING A THIRD SWITCH TO ENERGIZE SAID SECOND VALVE MEANS FOR FLOWING LIQUID THERETHROUGH TO ACTUATE SAID MECHANISM TO RENDER THE LATTER OPERABLE TO CLOSE SAID DRAIN OUTLET TO RETAIN THE LIQUID IN SAID COMPARTMENT, SAID THIRD SWITCH BEING ACTIVATED BY A THIRD ACTUATING MEMBER, SAID SECOND SWITCH REMAINING ATIVATED BY A SECOND ACTUATING MEMBER AFTER SAID THIRD SWITCH IS ACTIVATED BY SAID THIRD ACTUATING MEMBER, SAID FIRST SWITCH BEING ACTIVATED BY A FIRST ACTUATING MEMBER WHICH MAINTAINS SAID FIRST VALE MEANS OPEN FOR A SUFFICIENT INTERVAL OF TIME AFTER SAID DRAIN OUTLET IS CLOSED BY SAID MECHANISM TO PROVIDE AN ADEQUATE SUPPLY OF LIQUID IN SAID COMPARTMENT FOR WASHING DISHES BY CIRCULATING LIQUD THROUGH SAID COMPARTMENT AND WHICH THEREAFTER FUNCTIONS TO INACTIVATE SAID FIRST SWITCH TO DEENERGIZE SAID FIRST VALVE MEANS TO STOP ADMITTING LIQUID INTO SAID COMPARTMENT, CONDUIT MEANS INCLUDING A RECEPTACLE FOR HOLDING A BODY OF DETERGENT COMMUNICATING BETWEEN SAID SECOND VALVE MEANS AND SAID COMPARTMENT, SAID RECEPTACLE FUNCTIONING TO MIX DETERGENT WITH LIQUID FLOWING THERETO FROM SAID SECOND VALVE MEANS AND DELIVERING THE MIXTURE TO SAID COMPARTMENT, SAID FIRST SWITCH SUBSEQUENTLY BEING REACTIVATED BY SAID FIRST ACTUATING MEMBER TO ENERGIZE SAID FIRST VALVE MEANS TO ADMIT LIQUID AGAIN INTO SAID COMPARTMENT AFTER AN INTERVAL OF TIME REPRESENTING A WASHING PERIOD DURING WHICH SAID DRIVING MOTOR REMAINS ENERGIZED AND IS OPERABLE TO DRIVE SAID LIQUID CIRCULATING MEANS AND RECIRCULATE LIQUID RETAINED IN SAID COMPARTMENT, SAID THIRD SWITCH BEING INACTIVATED BY SAID THIRD ACTUATING MEMBER WHEN THE WASHING PERIOD TERMINATES TO DEENERGIZE SAID SECOND VALVE MEANS TO SHUT OFF FLOW OF LIQUID THROUGH SAID CONDUIT MEANS TO SAID COMPARTMENT THROUGH SAID RECEPTACLE AND RENDER SAID MECHANISM INOPERABLE TO CLOSE SAID DRAIN OUTLET WHEREBY LIQUID WILL DRAIN FROM SAID COMPARTMENT, SAID SECOND SWITCH REMAINING ACTIVATED BY SAID SECOND ACTUATING MEMBER AFTER SAID THIRD SWITCH IS INACTIVATED BY SAID THIRD ACTUATING MEMBER, AND SAID FIRST, SECOND AND THIRD ACTUATING MEMBERS BEING INACTIVATED BY SAID FIRST, SECOND AND THIRD SWITCHES RESPECTIVELY, TO DEENERGIZE SAID FIRST AND SECOND VALVE MEANS AND SAID DRIVE MOTOR AFTER AN INTERVAL OF TIME REPRESENTING A RINSE PERIOD.