The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 02, 1987
Filed:
Apr. 25, 1986
S Duke Snider, St. Louis, MO (US);
Kevin M May, St. Louis, MO (US);
Emerson Electric Co., St. Louis, MO (US);
Abstract
An electric motor has stator coils extending longitudinally past an end of its rotor so that the end turns and at least a portion of the inner side of the stator coils are exposed. A fan is disposed inside the motor shell between a first air passageway and the stator coils. The fan is secured to and driven by the rotor shaft to cause a flow of cooling air to pass over the stator coils when the motor is in operation. The fan has a number of vanes extending outwardly from a hub to a circumferential ring, which ring defines a central opening of the fan. The central opening extends past the vanes from the front to the rear of the fan so that the rear of the fan is relatively open. The inner surface of the ring is smoothly curved outwardly and rearwardly from the front of the central opening to direct air which enters the central opening toward the stator coils. The vanes are disposed adjacent the exposed portions of the stator coils to cause turbulent air flow along the exposed portions.