Patents by Inventor Dieter Rief

Dieter Rief 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).

  • Automatic pool cleaner fitting
    Patent number: 4683599
    Abstract: An underwater fitting is provided to allow a controlled leak of water into a suction line between a filter installation and an automatic pool cleaner. The fitting is T shaped with the head of the T in the suction line and the leg of the T controlled by a tapered mandrel in an orifice which are adjustable to vary the effective orifice area. The mandrel is spring biased so that is can be pushed back in case of a complete stoppage of flow from the cleaner.
    Type: Grant
    Filed: April 1, 1985
    Date of Patent: August 4, 1987
    Assignee: FAHET NV
    Inventor: Dieter Rief