Fan-cooled electric motor

• US 3,213,304 A
• Filed: 11/06/1962
• Issued: 10/19/1965
• Est. Priority Date: 11/06/1962
• Status: Expired due to Term

• Current Assignee: George G. Landberg, Paul D. Wagner
• Original Assignee: George G. Landberg, Paul D. Wagner
• Inventors: Landberg, George G., Wagner, Paul D.
• Application Number:
  US04/235,618
• Time in Patent Office: 1,078 Days
• US Class Current: 310/53
• CPC Class Codes: F04D 29/287 with adjusting means
• CPC Class Codes: H02K 2213/09 Machines characterised by the presence of elements which are subject to variation, e.g. adjustable bearings, reconfigurable windings, variable pitch ventilators
• CPC Class Codes: H02K 9/06 with fans or impellers driven by the machine shaft

Claims

1. IN AN ELECTRIC MOTOR HAVING A ROTOR;

MEANS FOR COOLING SAID MOTOR COMPRISING A MEMBER MOUNTED FOR ROTATION WITH SAID ROTOR, AT LEAST ONE BLADE PIVOTALLY MOUNTED ON SAID MEMBER, RETAINING MEANS ON SAID MEMBER POSITIONED ON EITHER SIDE OF SAID BLADE TO LIMIT THE MOVEMENT OF SAID BLADE IN EACH DIRECTION RELATIVE TO SAID MEMBER, THE PORTION OF SAID BLADE RADIALLY INWARD OF SAID PIVOTAL MOUNT HAVING A GREATER MASS THAN THE PORTION OF SAID BLADE RADIALLY OUTWARD OF SAID PIVOTAL MOUNT WHEREBY SAID BLADE WILL ASSUME A REARWARDLY INCLINED POSITION RELATIVE TO A RADIUS OF SAID ROTOR REGARDLESS OF THE DIRECTION OF ROTATION OF SAID ROTOR.