Patent ID: 6916240

Claim:
A register system for managing air flow through a building air supply outlet wherein air flow from a central air supply enters a room of the building through a duct having an aperture situated in a partition of the room, comprising: a) at least one butterfly damper, adjacent the duct aperture, structured and arranged to damp the air flow; b) wherein said at least one butterfly damper comprises, i) at least one rotating blocker structured and arranged to incrementally block the air flow, ii) at least one gear system structured and arranged to rotate said at least one rotating blocker, and iii) at least one actuator system structured and arranged to actuate said at least one gear system, c) said rotating blocker comprises two mirror-image semi-circle halves, wherein each said respective half comprises a spindle, having a central axis, attached along the diameter of said semi-circle half; d) said gear system comprises i) two substantially circular gears, each having a central axis and a set of first gear teeth, each attached to a respective end of each said spindle; ii) wherein each said respective spindle and each respective said attached gear is structured and arranged to attach to the other said respective spindle and respective said attached gear so that each said respective spindle and respective said attached gear have the same central axis, e) said actuator system comprises i) a set of upper linear second gear teeth, and ii) a set of lower linear second gear teeth, iii) wherein each said set of upper linear second gear teeth are structured and arranged to turn one said gear in a first rotational direction when moved linearly in a first linear direction and each said set of lower linear second gear teeth are structured and arranged to turn the other said gear in a second rotational direction when moved linearly in said first linear direction, iv) wherein linear movement of an actuator comprising both said sets of linear gear teeth in a first linear direction provides rotational movement of said semi-circle halves sufficient to operate said butterfly damper.