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  • Perforated sheet stock flow restrictor
    Patent number: 4456033
    Abstract: A flow restrictor to minimize noise and cavitation, or other adverse effects, in regulating the flow of a high pressure fluid. The restrictor defines a myriad of tortuous, dissimilar, intertwined, and commingled energy dissipating chambered flow paths edgewise through a stack of sheets of perforated stock material. Adjacent sheets have their perforations out of registration with one another, the inlet and outlet to the restrictor being edgewise through the stack through open-sided ones of the perforations of the several sheets of stock.
    Type: Grant
    Filed: October 9, 1981
    Date of Patent: June 26, 1984
    Assignee: Vacco Industries
    Inventors: George Kay, Alan Keskinen