Patents by Inventor Fredrick A. Powers

Fredrick A. Powers 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).

  • Loop injection circulation system
    Patent number: 4653532
    Abstract: A circulating system for dispensing fluid, such as paint, is provided with a circulating loop having a first pump. There is no substantial restriction in the circulating loop and a second pump injects additional fluid into the loop as needed to maintain pressure and make up for fluid which is dispensed by drops off of the circulating loop. Valving may be provided such that, either of the two pumps may function by itself in the event of a failure of one of the pumps.
    Type: Grant
    Filed: November 18, 1985
    Date of Patent: March 31, 1987
    Assignee: Graco Inc.
    Inventor: Fredrick A. Powers