Abstract: A nozzle assembly for a fan unit includes an inner nozzle having a tapered outer diameter and a flow path radially inward from the tapered outer diameter with respect to a longitudinal axis of the nozzle assembly. The flow path is configured to guide a fluid flow and to expel the fluid flow through an inner outlet of the inner nozzle to a surrounding environment. The nozzle assembly also includes an outer nozzle disposed radially outward from the inner nozzle with respect to the longitudinal axis. The outer nozzle and the tapered outer diameter of the inner nozzle define an annular flow path therebetween. The annular flow path is configured to guide the fluid flow and to expel the fluid flow to the surrounding environment through an outer outlet of the outer nozzle. A cross-sectional area of the outer outlet is adjustable via movement of the inner nozzle, the outer nozzle, or both along the longitudinal axis of the nozzle assembly.

Abstract: A nozzle assembly for a fan unit includes an inner nozzle having a tapered outer diameter and a flow path radially inward from the tapered outer diameter with respect to a longitudinal axis of the nozzle assembly. The flow path is configured to guide a fluid flow and to expel the fluid flow through an inner outlet of the inner nozzle to a surrounding environment. The nozzle assembly also includes an outer nozzle disposed radially outward from the inner nozzle with respect to the longitudinal axis. The outer nozzle and the tapered outer diameter of the inner nozzle define an annular flow path therebetween. The annular flow path is configured to guide the fluid flow and to expel the fluid flow to the surrounding environment through an outer outlet of the outer nozzle. A cross-sectional area of the outer outlet is adjustable via movement of the inner nozzle, the outer nozzle, or both along the longitudinal axis of the nozzle assembly.

Abstract: The present disclosure relates to a power transmission system for actuating a damper. The power transmission system includes an input shaft configured to rotate about a first axis and a first input dog rotatably coupled to the input shaft. The power transmission system also includes a second input dog coupled to the first input dog. The first input dog includes a first arrangement of teeth extending along a second axis and the second input dog includes a second arrangement of teeth extending along the second axis. The first input dog and the second input dog are configured to move axially along the second axis to enable engagement and disengagement of the first and second input dogs with first and second output dogs, respectively. The first and second output dogs are configured to engage with respective damper blades of the damper.

Abstract: A nozzle assembly for a fan unit includes an inner nozzle having a tapered outer diameter and a flow path radially inward from the tapered outer diameter with respect to a longitudinal axis of the nozzle assembly. The flow path is configured to guide a fluid flow and to expel the fluid flow through an inner outlet of the inner nozzle to a surrounding environment. The nozzle assembly also includes an outer nozzle disposed radially outward from the inner nozzle with respect to the longitudinal axis. The outer nozzle and the tapered outer diameter of the inner nozzle define an annular flow path therebetween. The annular flow path is configured to guide the fluid flow and to expel the fluid flow to the surrounding environment through an outer outlet of the outer nozzle. A cross-sectional area of the outer outlet is adjustable via movement of the inner nozzle, the outer nozzle, or both along the longitudinal axis of the nozzle assembly.

Abstract: The present disclosure relates to a power transmission system for actuating a damper. The power transmission system includes an input shaft configured to rotate about a first axis and a first input dog rotatably coupled to the input shaft. The power transmission system also includes a second input dog coupled to the first input dog. The first input dog includes a first arrangement of teeth extending along a second axis and the second input dog includes a second arrangement of teeth extending along the second axis. The first input dog and the second input dog are configured to move axially along the second axis to enable engagement and disengagement of the first and second input dogs with first and second output dogs, respectively. The first and second output dogs are configured to engage with respective damper blades of the damper.