Patents by Inventor Keith V. Eisberg

Keith V. Eisberg 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 flow variable area expansion device for heat pump system
    Patent number: 5029454
    Abstract: A flow metering device for use as an expansion valve in a heat pump system includes a body having a flow passage extending therethrough. A piston having a flow metering port extending therethrough is moveably positioned within the flow passage. An elongated member extends through the metering port of the piston and is axially and radially fixed within the body. The elongated member has a central portion which cooperates with the metering port to prevent flow through the port when axially aligned with it. The elongated member has flow metering configurations formed thereon on both sides of the central portion. The piston is spring biased into alignment with the central portion. Refrigerant flow in either direction through the device results in movement of the piston against a spring force into a flow metering relationship with one of the metering configurations.
    Type: Grant
    Filed: July 26, 1990
    Date of Patent: July 9, 1991
    Assignee: Carrier Corporation
    Inventor: Keith V. Eisberg
  • Housing for an outdoor coil of an air conditioning system
    Patent number: D306642
    Type: Grant
    Filed: February 29, 1988
    Date of Patent: March 13, 1990
    Assignee: Carrier Corporation
    Inventors: Dick Y. K. Chang, Keith V. Eisberg, Curtis D. Wichmann