Patents Assigned to William W. Sismore
  • Tube traveler
    Patent number: 4044444
    Abstract: An extractor for pulling individual tubes from a tube sheet in a heat exchanger. The extractor includes two pairs of drivers mounted in a housing on parallel rotatable shafts. The two drivers in each pair have inclined teeth which project into opposite sides of a passageway along which a tube is drawn. A variable speed pneumatic motor and a gear transmission rotate the four drivers at the same controlled speed and rotate the two drivers in each pair in opposite directions to advance a tube through the passageway.
    Type: Grant
    Filed: February 12, 1976
    Date of Patent: August 30, 1977
    Assignee: William W. Sismore
    Inventor: Richard T. Harris