Tractor unit drive gear engagement device
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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-
Dec 8, 2015
Issued Date -
N/A
app pub date -
Nov 13, 2012
filing date -
Nov 18, 2011
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A tractor unit system includes a tractor unit that has a travel drive gear. The travel drive gear includes a drive gear portion and at least one drive roller portion. The system also includes a guide track that has a track gear. The track gear includes a track gear portion and at least one land portion. The at least one drive roller portion and the at least one land portion are configured such that the at least one drive roller portion contacts the at least one land portion when the drive gear portion is engaged to the track gear portion. In some embodiments, a diameter of the at least one drive roller portion is equal to a pitch diameter of the drive gear portion. If the track gear portion is curved, in some embodiments a diameter of the at least one land portion equals a pitch diameter of the track gear portion. In other embodiments, if the track gear portion is straight, a dimension of the at least one land portion equals a pitch line of the track gear portion.
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