Patents by Inventor Dennis S. Dostal

Dennis S. Dostal 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).

  • Dual circuit heat pump
    Patent number: 9052125
    Abstract: A heat pump includes a compressor for compressing refrigerant. The compressed refrigerant is divided into a first portion and a second portion. Simultaneously, the first portion of the refrigerant is used in a first vapor-compression circuit to heat or cool a space and the second portion of the refrigerant is used in a second vapor-compression circuit to heat a fluid. In a single external source heat exchanger, both the first portion of the refrigerant in the first vapor-compression circuit and the second portion of the refrigerant in the second vapor compression circuit exchanges heat with an external source fluid.
    Type: Grant
    Filed: August 30, 2012
    Date of Patent: June 9, 2015
    Inventor: Dennis S. Dostal