Patents Assigned to Hays Heating & Plumbing Company
  • Dry pipe fire extinguishing sprinkler system
    Patent number: 4220208
    Abstract: A dry pipe fire extinguishing sprinkler apparatus including an adapter which is charged with fluid under pressure and connects an adjustable drop nipple or branch pipe having a sprinkler to a header or supply pipe. The adapter includes a valve member which excludes water from the drop nipple and sprinkler until the fluid under pressure is discharged after which such valve member opens to discharge water through the sprinkler.
    Type: Grant
    Filed: November 21, 1977
    Date of Patent: September 2, 1980
    Assignee: Hays Heating & Plumbing Company
    Inventors: Jimmy Jackson, William D. Roquemore