Rotary drive device for use with process valve, has drive pivotal arm in entrainment engagement with output pivotal arm, where force is exerted on output pivotal arm and simultaneously movement is executed transverse to pivotal direction

摘要

The device (1) has a rotary drive unit with a support structure (7). A drive pivotal arm (22) is in entrainment engagement with an output pivotal arm (16) in an articulated manner by a stationary entrainment unit (47), such that the entrainment unit runs through an entrainment curve (55) during execution of drive pivoting movement (23) of the drive pivotal arm. Pivoting force causing output pivoting movement (18) is exerted on the output pivotal arm, and simultaneously translatory input movement (52) relative to the output pivotal arm is executed transverse to a pivotal direction.