Patent ID: 7509966

Claim:
A step-up assist device comprising: a base having an extendable and retractable platform; an actuator assembly with an actuator operably engaged with linkage connected to the platform, the linkage configured to extend and retract the platform upon operation of the actuator; wherein the actuator assembly includes a rocker arm having a first face, a second face, a pivot point between the first face and second face and a moment arm connector extended a fixed distance from the pivot point; a drive link with an axle portion and an elbow arm radially disposed about the axle portion; and a linkage member having a substantially constant tension and a first securement engaged with the moment arm connector and a second securement engaged to the axle portion of the drive link wherein a pivot of the moment arm connector about the pivot point induces the axle portion to rotate and the elbow arm to rotate about the axle arm.