B - Operations – Transporting – 61 – B
Patent
B - Operations, Transporting
61
B
B61B 10/00 (2006.01) B61B 10/02 (2006.01)
Patent
CA 2358734
A cam bar assembly for transferring a trolley from driving engagement with a first chain to driving engagement with a second chain wherein the cam bar assembly includes a cam bar having a first longitudinal axis, a cam surface centered about the first longitudinal axis, a second longitudinal axis, and a cam face centered about the second longitudinal axis. The second longitudinal axis is offset from the first longitudinal axis. The present invention is also directed to a power and free conveyor having the cam bar assembly as well as a drive trolley disposed within a free track for movement in a driven direction and having a retractable surface movable between an engaging position and a retracted position. The power and free conveyor also includes a first drive chain, a second drive chain, and a transfer zone having an entrance and an exit. The first drive chain is positioned to drivably engage the drive trolley at the entrance and the second drive chain is positioned to drivably engage the drive trolley at the exit. The cam bar is positioned in the transfer zone to engage the drive trolley and move the retractable surface from its engaging position to its retracted position.
Fahner James P.
Kaufman Jeffrey F.
Mackenzie Robert J.
Robison Rodney K.
Whitehead Greg A.
Jervis B. Webb Company
Ridout & Maybee Llp
LandOfFree
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