Water temperature control for automatic washers
Patent 5255844 Issued on October 26, 1993. Estimated Expiration Date: 
July 27, 2012. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
July 27, 2012. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 2411960 2619284 2844320 2844321 3207435 3362197 3521470 Laundry machine improved water temperature control and method Laundry machine improved water temperature control and method Water temperature control system for a clothes washing machine InventorsApplicationNo. 918753 filed on 07/27/1992US Classes:236/12.12, Having electrical motive means68/12.03, Temperature of the load236/12.15Including separate relatively movable valve for each fluid supplyExaminersPrimary: Tanner, Harry B.Attorney, Agent or FirmInternational ClassG05D 023/13AbstractA water temperature control system for achieving one of a plurality of wash water temperatures for a washing machine having a hot water valve, a cold water valve and an inlet conduit for carrying a combined supply of water from the hot and cold water valves to a wash bath. If a WARM FILL option is selected by the user, the cold water valve is continuously energized thereby maintaining the valve in an open condition and a normally closed temperature responsive switch is connected in series with the hot water valve. The normally closed temperature responsive switch has a predetermined temperature set point and is located on the inlet conduit. The normally closed temperature responsive switch operates to cycle the hot water valve on and off to control the inlet wash water temperature at or below the first preselected set point. If a HOT FILL option is selected, the hot water valve is continuously energized and a normally open temperature responsive switch is connected in series with the cold water valve. The normally open temperature responsive switch has a predetermined temperature set point and is located on the inlet conduit. The normally open temperature responsive switch operates to cycle the cold water valve on and off to control the inlet wash water temperature to at or below the second preselected set point. | |
