Patents by Inventor Farid Akhtarekhavari

Farid Akhtarekhavari 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).

  • Patent number: 4474209
    Abstract: Disclosed is a pair of check valves for a home solar heating apparatus, one check valve for the solar collector supply line and one for the return line. The check valves have a transparent portion and an impeller which rotates during water flow and is located in the transparent portion, providing a visual check on water flow. Further, the impeller in the collector supply line acts as a check valve element which is gravity closed due to the impeller's greater-than-water density. Analogously, the impeller in the solar collector return line acts as a check valve due to its less-than-water density, these check valves operating to permit the usual direction of flow powered by a circulating pump but impeding the opposite direction of flow powered by thermosyphoning.
    Type: Grant
    Filed: November 18, 1982
    Date of Patent: October 2, 1984
    Inventor: Farid Akhtarekhavari
  • Patent number: D306245
    Type: Grant
    Filed: February 12, 1987
    Date of Patent: February 27, 1990
    Inventor: Farid Akhtarekhavari