Patent ID: 8011114
Filing Date: 2011-09-06
Classification: F04D,F05D,F26B

Abstract:
1. A blower for blowing a stream of air at predetermined times, said blower comprising in combination: a. a motor for rotating a drive shaft; b. a fan coupled to said drive shaft for being rotated thereby about a first axis of rotation, said fan having an outer periphery and causing air to be discharged from the outer periphery thereof when said fan is rotated by said motor; c. a housing encircling said fan, said housing including a central air inlet for admitting air to said fan, said housing including an outlet nozzle, said housing receiving air discharged from the outer periphery of said fan and blowing the discharged air through the outlet nozzle; d. a valve rotatably mounted within the central air inlet of said housing about a second axis of rotation, said valve having an open position for allowing passage of air through the central air inlet, and having a closed position for substantially blocking passage of air through the central air inlet; and e. an actuator coupled to the valve for selectively rotating the valve to its open position when a stream of air is desired, and to its closed position when a stream of air is not desired, said actuator selectively rotating the valve to its closed position even while said fan continues to be rotated by said motor.