Unloadable transport refrigeration unit control
Patent 4327558 Issued on May 4, 1982. Estimated Expiration Date: 
September 17, 2000. 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.
September 17, 2000. 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 2920812 2962873 3010289 3768274 InventorsAssigneeApplicationNo. 06/188170 filed on 09/17/1980US Classes:62/160, Reversible cycle machine62/196.2, For plural compressor cylinders62/196.4, Condensor bypass62/228.1Compressor or its drive controlledExaminersPrimary: Makay, Albert J.Assistant: Tanner, Harry B. Attorney, Agent or FirmInternational ClassesF25D 29/00 (20060101)F25B 13/00 (20060101) F25B 49/02 (20060101) F25B 47/02 (20060101) F25B 27/00 (20060101) AbstractA hot gas pressure switch 29 is provided to be responsive to pressure in a hot gas line 22 which will have a significant pressure value only during a heat or defrost mode, to unload cylinders of a transport refrigeration compressor to avoid overload, so that the compressor can operate with a substantially greater discharge pressure in a cooling mode without penalty. | |
