ROTARY ACTUATORS WITH CHAIN OPERATED CAMS

摘要

An example rotary actuator includes a cam that is to be coupled to a valve. The cam is rotatable about an axis. The example rotary actuator also includes a linear actuator having a stem movable along a path offset from and perpendicular to the axis and a chain having a first end and a second end opposite the first end. The first end of the chain is coupled to the stem and the second end of the chain coupled to the cam. The chain is disposed around at least a portion of an outer edge of the cam, and movement of the stem along the path rotates the cam about the axis.

主权项

1. A rotary actuator comprising:
a rotatable member to be coupled to a valve, the rotatable member rotatable about a first axis, the rotatable member being substantially square-shaped; a linear actuator having a stem movable along a second axis offset from and perpendicular to the first axis; and a first chain having a first end and a second end opposite the first end, the first end of the first chain coupled to the stem and the second end of the first chain coupled to the rotatable member, the first chain disposed around at least a portion of an outer edge of the rotatable member, wherein movement of the stem along the second axis rotates the rotatable member about the first axis, and wherein the first chain includes a plurality of links, a first link disposed along and having a substantially same length as a side of the rotatable member.