Patent ID: 9228589
Filing Date: 2016-01-05
CPC Classification: A01D,F04D

Claim Text:
1. A flow area adjustment device for a duct with variable flow area, the flow area adjustment device comprising: a first duct wall section bounding, at least in part, a flow channel of the duct over a first flow region, the first duct wall section having a first and a second mounting position with respect to the duct; and a second duct wall section bounding, at least in part, the flow channel of the duct over a second flow region adjacent the first flow region, the second duct wall section having a first end with a first mounting connection and a second end with a second mounting connection angled with respect to the first mounting connection, each of the first and the second mounting connections being configured to mount the second duct wall section to one or more of the first duct wall section and a third duct wall section adjacent the second duct wall section; wherein, with the first duct wall section in the first mounting position, the second duct wall section is mounted to the first duct wall section via the first mounting connection and is mounted to the third duct wall section via the second mounting connection, whereby the first duct wall section and the second duct wall section form a first angle in the flow channel; and wherein, with the first duct wall section in the second mounting position, the second duct wall section is mounted to the first duct wall section via the second mounting connection and is mounted to the third duct wall section via the first mounting connection, whereby the first duct wall section and the second duct wall section form a second angle in the flow channel that is different from the second angle.