Patent ID: 9730364
Date: 2017-08-08
CPC Classifications: F04D,H05K

Claim:
1. A contra-rotating fan system, comprising: a fan chassis; a first fan that is mounted in the fan chassis and that includes: a first motor, at least one signal input that is coupled to the first motor and that is configured to receive one or more signals from a cooling engine, and a number of blades that are oriented to: a second fan that is mounted in the fan chassis adjacent the first fan and that includes: a second motor, at least one signal input that is coupled to the second motor and that is configured to receive the one or more signals from the cooling engine, and the same number of blades as the first fan, wherein the first motor and the second motor are configured to rotate the first fan and the second fan at the same time in opposite directions, and wherein the blades on the second fan are oriented to: