B - Operations – Transporting – 61 – B
Patent
B - Operations, Transporting
61
B
198/12.08
B61B 10/00 (2006.01) B61B 10/04 (2006.01)
Patent
CA 1276580
TROLLEY STOP FOR POWER AND FREE CONVEYORS Abstract of the Disclosure A trolley stop assembly is provided for use in combination with a power and free conveyor system having a trolley member driven along a track by a drive mechanism. In the preferred embodiment, the conveyor system involved is an inverted power and free assembly wherein a trolley dog depends downwardly from each trolley. The preferred trolley dog is engaged by drive dogs on the drive mechanism, for pushing the trolley along the track; and, the preferred trolley dog is movable between upper and lower positions, for respective disengagement or engagement with drive dogs. The preferred assembly includes a stop arm pivotally mounted within the conveyor system for pivoting about a generally horizontal axis. Means are provided for lifting the stop arm into a first, upper, position wherein it can engage a portion of a trolley dog on a trolley to be stopped, to lift the trolley dog out of possible engagement with drive dogs. The preferred stop arm is elongate and includes a first, upper, cam surface with an abutment portion therein, providing for positive braking by mating with a portion of the trolley dog. An actuator mechanism includes a cam member engageable with the stop arm, to pivot same between upper and lower positions. The cam member is, preferably, actuated by a double-action piston and cylinder arrangement oriented generally against a side of the assembly. Means are provided for retention of the stop arm in an upper position, without maintaining substantial pressure in the cylinder.
546855
Fetherstonhaugh & Co.
Mid-West Conveyor Company Inc.
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