Freon free refrigerator
Patent 5339639 Issued on August 23, 1994. Estimated Expiration Date: 
July 2, 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 2, 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 3262277 3817044 Adsorption heat pump Process for the energy-saving recovery of useful or available heat from the environment or from waste heat Package handling in a film wrapping machine Cooling machine or heat pump Patent #: 4584840 InventorApplicationNo. 908661 filed on 07/02/1992US Classes:62/6, GAS COMPRESSION, HEAT REGENERATION AND EXPANSION, E.G., STIRLING CYCLE62/112, Utilizing particular refrigerant and/or sorbent materials62/480With solid sorbentExaminersPrimary: Wayner, William E.Attorney, Agent or FirmForeign Patent References
International ClassF25B 009/00Foreign Application Priority Data1991-07-13 GBAbstractA refrigerator includes a cylinder containing a bed of adsorbent material and a gas, e.g. carbon dioxide. A piston compresses the gas which is adsorbed by the adsorbent material and the heat of adsorption is dissipated by fins to atmosphere. The piston, when retracted, decompresses the gas which desorbs from the adsorbent material. Repeated compression and decompression of the gas causes a cold zone to be created within the material which is thermally linked to a location to be refrigerated. | |
