Valve actuator

Apparatus comprising:

• an actuator, wherein the actuator is configured to selectively control fluid flow through at least one valve,
• the actuator including:
• a first rotor, wherein the first rotor is selectively rotatable about an axis,
• a second rotor, wherein the second rotor
• is axially disposed away from the first rotor,
• is rotatable about the axis in a first rotational direction and is prevented from rotating about the axis in a second rotational direction opposed of the first rotational direction,
• at least one actuating finger,
• wherein each actuating finger includes a longitudinal inner end and a longitudinal outer end,
• wherein the outer end is configured to operatively engage and position a respective valve element of a respective fluid valve, wherein flow through the respective fluid valve is controlled by the position of the respective valve element,
• at least one drive pin, wherein each drive pin
• is in operative connection with the first rotor,
• is disposed radially outward from the axis, and
• extends axially intermediate of the first rotor and the second rotor,
• wherein the respective inner end of each respective actuating finger is rotatably movably mounted in operative connection with the first rotor through a respective drive pin,
• at least one drive rod, wherein each drive rod
• is in fixed operative connection with the first rotor,
• is disposed radially outward from the axis,
• extends axially intermediate of the first rotor and the second rotor, and
• is operatively engageable with the second rotor,
• wherein the second rotor includes
• at least one elongated arcuate slot,
• wherein each slot
• extends along a respective arc that is concentric with the axis,
• is bounded at a first angular end by a first end wall,
• is bounded at a second angular end by a second end wall,
• wherein a respective drive rod extends within the slot and is movable relative to the second rotor within the slot between the first end wall and the second end wall,
• at least one guide, wherein each guide
• is engaged with a respective actuating finger in a respective guide location,
• wherein the respective guide location
• is further radially outward from the respective drive pin with which the respective actuating finger is operatively engaged,
• is positioned in fixed relation relative to the second rotor, and
• is operative to enable the respective outer end of the respective actuating finger to move radially responsive to movement of the respective drive pin relative to the second rotor while the actuating finger is held in movable engagement with the guide at the guide location,
• wherein rotation of the first rotor in the first rotational direction is operative to cause
• the second rotor to rotate in the first rotational direction responsive to engagement of each respective drive rod with the respective first end wall of the respective slot in which the respective drive rod extends, and
• the respective outer end of each actuating finger to be positioned in a radially retracted position,
• and wherein after rotation of the first rotor in the first rotational direction has caused each actuating finger to be positioned in the retracted position, rotation of the first rotor in the second rotational direction is operative to cause
• each drive post to move in the second rotational direction in the respective slot away from the first end wall while the second rotor remains stationary,
• each respective outer end of each actuating finger to move radially outward from the retracted position responsive to movement of the respective drive pin relative to the guide location,
• whereby radially outward movement of at least one respective outer end is operative to position a respective valve element that is in operative engagement therewith.