Patents by Inventor Gerd Ehrhardt

Gerd Ehrhardt 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).

  • Jet pump, in particular for hot-water heating systems with return-flow mixing
    Patent number: 4846617
    Abstract: A jet pump, in particular for hot-water heating systems or water-heating systems with return-flow mixing has a feeder head which is connected with a housing containing the receptor nozzle 13. The housing (7) contains a mixing tube (14) which is connected via a diffuser if needed with a second line connection (12), is coaxial with an injector nozzle (10) and adjoins the receptor nozzle (13); the mixing tube (14) also extends longitudinally through a chamber (22) of the housing in which at least a third line connection (18) and, if desired, a fourth line connection (19), directed respectively transversely to the mixing tube, discharges.In order to attain, e.g.
    Type: Grant
    Filed: April 4, 1985
    Date of Patent: July 11, 1989
    Assignee: Mr. Helmut Balz
    Inventor: Gerd Ehrhardt