Patent ID: 6860713
Filing Date: 2005-03-01
Classification: F01D,F04D,F05B,F05D,G06F,H05K

Abstract:
1. A collapsible fan for use in a redundant fan system comprising a first fan including a fan frame, a rotor rotatably mounted on the fan frame, a first aperture located on one side of the rotor, a second aperture located on an opposite side of the rotor relative to the first aperture, and a plurality of fan blades mounted on the rotor, the collapsible fan comprising: a fan frame, a rotor rotatably mounted on the fan frame, a first aperture located on one side of the rotor, a second aperture located on an opposite side of the rotor relative to the first aperture, and a plurality of collapsible fan blades pivotally mounted on the rotor, wherein the collapsible fan is mountable adjacent to one of the first and second apertures of the first fan, and the collapsible fan blades are collapsible onto the respective rotor in connection with an airflow generated by the first fan.