Patent ID: 7404543

Claim:
An actuator for a valve having a stem rotatable about a first axis of rotation, said actuator comprising: a plate mountable on said valve substantially perpendicular to said stem; a guide slot positioned in said plate, said guide slot having a plurality of regions including at least a first slot region having a first radius of curvature and a second slot region having a second radius of curvature different from said first radius; a handle mountable on said stem; and a cam mounted on said handle and rotatable about a second axis of rotation oriented substantially perpendicular to said plate, said cam being eccentric to said second axis of rotation and extending through said guide slot, wherein rotation of said cam to a first orientation positions said cam at said first radius thereby permitting said handle to be turned along an arc traversing said first slot region, further rotation of said cam to a second orientation positioning said cam at said second radius thereby permitting said handle to be turned along an arc traversing said second slot region.