Apparatus for raising a liquid to a given temperature
Patent 4286140 Issued on August 25, 1981. Estimated Expiration Date: 
March 7, 1999. 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.
March 7, 1999. 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 1358982 1671677 1767122 2438865 2775683 Electrical filtered air heater Patent #: 4147923 InventorsAssigneeApplicationNo. 06/018335 filed on 03/07/1979US Classes:392/493, Heating element integral with baffle165/156, Helical conduit means392/487With jacket for heating elementExaminersPrimary: Reynolds, Bruce A.Assistant: Roskoski, Bernard Attorney, Agent or FirmInternational ClassesF24H 1/14 (20060101)F24H 1/12 (20060101) F24H 9/20 (20060101) Foreign Application Priority Data1978-03-21 FRAbstractAn apparatus for raising a liquid to a given temperature and for controlling and regulating this temperature has a vertical cylindrical enclosure, a vertical tube housing a heating resistor, and a first and a second ferrule located in this order between the tube and the enclosure to define a first, a second and a third annular space. The first ferrule is connected to the lower wall of the enclosure. The tube and the second ferrule are connected to the upper wall of the enclosure. The liquid is supplied to the lower portion of the first space and extracted from the upper portion of the third space. The length of the resistor is shorter by at least one quarter of the height of the tube and orifices in the lower portion of the first ferrule produce a thermosiphon effect between the first and second annular spaces. | |
