Patents by Inventor James R. Helmer

James R. Helmer has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Latent heat economizing device for refrigeration systems
    Patent number: 4807449
    Abstract: A latent heat economizing device having a shell forming a chamber, a saturated refrigerant inlet, a liquid refrigerant outlet, a dual air pass and a suction gas pass is provided for installation in the liquid refrigerant line of a refrigeration system prior to an existing liquid sub-cooler upstream from a metering device in the direction of flow. The inlet includes means for distribution of saturated refrigerant evenly over the internal surface area of the chamber to effect heat transfer and removal of the latent heat of condensation from the vapor and sub-cooling of refrigerant liquid. A liquid level is maintained within the shell to effect heat transfer from the liquid to the suction gas pass. The outlet for the liquid is connected to the lowest part of the shell to insure that no vapor is passed through the outlet to the metering device.
    Type: Grant
    Filed: November 10, 1986
    Date of Patent: February 28, 1989
    Inventor: James R. Helmer
  • Magnetic-backed timer with indicator
    Patent number: D459665
    Type: Grant
    Filed: November 30, 2001
    Date of Patent: July 2, 2002
    Inventor: James R. Helmer, Sr.