主权项 |
1. A device for applying rotational force to an object comprising:
a cast casing (300) which partially encloses a driven member and has an opening for accommodating a shaft; a rotatable driven member housed in the casing, said driven member having a slot with an open end for accommodating a shaft and a semi-octagonal hole in the center to accommodate a coupling structure; a power transmission housed in the casing for rotating the driven member, said power transmission connected to a motor whereby on operation of the motor the power transmission rotates the driven member; and, a means connecting the driven member to the object whereby the object is rotated with the driven member, said means connecting the driven member to the object comprising a novel cast semi-octagonal structure having a slot (13) with an open end to accommodate a shaft, the semi-octagonal shape of the structure wherein the slot in the structure coincides with the slot in the driven member, and, a coupler (400) mounted on the driven member that is engageable with the object whereby rotation of the structure by the driven member will rotate the object. |