Electric actuator for single and double flap dust valves
AssigneePlattco Corporation
InventorsAlex Sterling, Kevin Guay
Life of this patent
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Abstract
Electric actuators for flap valves such as double flap dust valves for controlling the conveyance of abrasive particles are disclosed. Embodiments if electric actuators disclosed include a lead screw driven by a stepper motor. The lead screw includes a slider assembly that engages a yoke with a cam and causes the yoke to move through a preset angle while holding the yoke at angular positions corresponding open and closed positions of the flap valve. The yoke includes a connection to the flap valve actuator shaft.
Claims19
An electric actuator for flap dust valves, comprising;
- an actuator housing;
- an electric motor supported on the actuator housing;
- a lead screw in the actuator housing driven by the electric motor;
- a slider on the lead screw translating in response to rotation of the lead screw;
- and
- a yoke including a torque-transferring connection connectable to an actuating shaft of a flap dust valve, wherein the yoke is pivotably mounted on the actuator housing and driven through a pre-set travel arc of 45 degrees by engagement with the slider, said pre-set travel arc being between a valve closed position with the yoke positioned at 90 degrees with respect to the lead screw and an open position with the yoke positioned at 45 degrees with respect to the lead screw.
An electric actuator for flap dust valves, comprising:
- an actuator housing;
- an electric motor supported on the actuator housing;
- a lead screw in the actuator housing driven by the electric motor;
- a slider on the lead screw translating in response to rotation of the lead screw, said slider having arms extending from opposite sides perpendicular to the lead screw;
- and
- a yoke including a torque-transferring connection connectable to an actuating shaft of a flap dost valve, wherein the yoke is pivotably mounted on the actuator housing and driven through an entre pre-set travel arc of 45 degrees by engagement with the slider arms, the yoke comprising a yoke body and a pair of downwardly extending legs on each side of the yoke body positioned to lie on opposite sides of the lead screw, each pair of legs defining a slot configured to receive one said slider arm between said pair of legs through said entire pre-set travel arc;
- wherein said entire pre-set travel arc extends from a valve closed position with the yoke positioned at 90 degrees with respect to the lead screw and a valve open position with the yoke positioned at 45 degrees with respect to the lead screw.
Dependencies are inferred from the claim text.