Patents Assigned to Pitts Drive, Inc.
  • Speed differential planetary gear train
    Patent number: 4014224
    Abstract: A planetary gear train having four gears that are arranged as two external-internal pairs, in which the two external gears are connected to form a cluster which rotates around a rotatable eccentric, and within the respective internal gears. Certain relations between parameters of the four gears provide high efficiency.
    Type: Grant
    Filed: May 12, 1975
    Date of Patent: March 29, 1977
    Assignee: Pitts Drive, Inc.
    Inventor: Dallas L. Pitts