Patents Assigned to Devin S. Davis
  • Patent number: 4022245
    Abstract: A swing type check valve is connected by a double compression coupling to an irrigation pipe. The compression sleeve over the valve is transparent so that the valve may be sight checked or visually inspected.
    Type: Grant
    Filed: April 8, 1976
    Date of Patent: May 10, 1977
    Assignee: Devin S. Davis
    Inventor: Leon E. Davis