Patents Assigned to Howard Ingram Cairns
  • Nipple operated animal watering valve
    Patent number: 4320891
    Abstract: A nipple operated animal liquid valve having a valve body defining a passage through which liquid passes to be dispensed by the valve, and a passage closure selectively operable to close the passage, the closure having a nipple which may be operated by an animal to operate the valve.
    Type: Grant
    Filed: April 21, 1980
    Date of Patent: March 23, 1982
    Assignee: Howard Ingram Cairns
    Inventor: Gerald J. W. Cairns