Variable-pitch fan

• US 3,299,963 A
• Filed: 10/11/1965
• Issued: 01/24/1967
• Est. Priority Date: 10/20/1964
• Status: Expired due to Term

• Current Assignee: Stanley Lowe Kenneth
• Original Assignee: Stanley Lowe Kenneth
• Inventors: STANLEY LOWE KENNETH
• Application Number:
  US04/494,494
• Time in Patent Office: 470 Days
• US Class Current: 416/39
• CPC Class Codes: F01P 7/06 by varying blade pitch

Claims

1. A VARIABLE PITCH COOLING FAN COMPRISING A DRIVEN MEMBER, A PLURALITY OF FAN BLADES, RADIALLY POSITIONED PINS ROTATABLY SUPPORTING SAID FAN BLADES UPON THE DRIVEN MEMBER FOR CHANGING THE PITCH OF THE FAN BLADES, A PITCH CONTROLLING MEMBER POSITIONED COAXIALLY WITH RESPECT TO THE AXIS OF ROTATION OF THE FAN AND ROTATABLE WITH RESPECT TO THE DRIVEN MEMBER, A PLURALITY OF FINGER-LIKE MEMBERS EQUAL IN NUMBER TO THE FAN BLADES POSITIONED RADIALLY ABOUT THE PITCH MEMBER, AND THE ROOT OF EACH FAN BLADE HAVING A PAIR OF SLOTS ARRANGED AT AN ANGLE TO ONE ANOTHER AND DEFINING EQUAL ANGLES TO THE SURFACE OF THE FAN BLADE ENGAGEABLE ALTERNATIVELY BY THE COOPERATING FINGER-LIKE MEMBER WHEN THE FAN BLADES ARE ASSEMBLED UPON THE DRIVEN MEMBER TO ADAPT THE POSITION OF THE FAN BLADES FOR THE MOTION OF AIR IN THE DESIRED AXIAL DIRECTION FOR THE SAME DIRECTION OF ROTATION.