Conveyors: power-driven – Conveyor section – Live roll
Patent
1981-04-13
1983-08-30
Nase, Jeffrey V.
Conveyors: power-driven
Conveyor section
Live roll
464 34, B65G 1306
Patent
active
044012080
ABSTRACT:
A torque limiting drive coupling adapted to rotate a conveyor roller of an accumulating conveyor system comprises inner and outer cylindrical driving and driven surfaces rotatable about a common axis and providing a space therebetween extending entirely around said axis, which space may have a constant radial dimension, or a radial dimension that decreases in both circumferential directions from a maximum to a minimum. A torque transmitting roller of resiliently deformable elastomeric material is initially compressed within said space to engage said cylindrical surfaces in rolling a frictional torque transmitting relationship. The maximum torque that can be applied to rotate the driven surface, which is connected with a conveyor roller for rotation in unison therewith, is a function of the force required to deform the roller upon rotation of the driving surface when rotation of the conveyor roller and the connected driven surface is stopped by operation of the conveyor system. Accordingly, when the conveyor roller is restrained against rotation, continued rotation of the driven surface will either impart a constant torque to the driven surface, or a torque that gradually increases to the maximum as the roller moves within said space to the region of minimum radial dimension, and momentary torque impulses of large magnitude tending to cause momentary rotational impulses to the conveyor roller and damage to the workpiece carried thereby are avoided.
REFERENCES:
patent: 4143525 (1979-03-01), Major
patent: 4275572 (1981-06-01), Holmes et al.
Nase Jeffrey V.
Taylor Jay C.
Waldrop Neal A.
Williamson Dennis
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