Fan and motor assembly for an appliance such as a vacuum cleaner and a vacuum cleaner having same
AssigneeOmachron Intellectual Property Inc.
InventorWayne Ernest Conrad
Life of this patent
Estimating the term…
Abstract
Described herein are appliances such as a vacuum cleaners having an air flow passage and a fan assembly provided in the air flow passage. The fan assembly includes (a) a first motor comprising a first rotor, a first stator, and a first rotatable output shaft drivingly connected to the first rotor; and (b) a second motor comprising a second rotor, a second stator, and a second rotatable output shaft drivingly connected to the second rotor. The first rotatable output shaft is driving connected to the second stator; and a fan blade drivingly connected to the second rotatable output shaft. Also described herein are methods of energizing a fan assembly of a portable appliance.
Claims17
An appliance having an air flow passage and a fan assembly provided in the air flow passage, the fan assembly comprising:
- (a) a first motor comprising a first rotor comprising a first magnetic portion, a first stator comprising a first winding portion, and a first rotatable output shaft drivingly connected to the first rotor, the first rotor is an outer rotor and the first stator is an inner stator;
- (b) a second motor comprising a second rotor comprising a second magnetic portion, a second stator comprising a second winding portion, and a second rotatable output shaft drivingly connected to the second rotor, the second rotor is an inner rotor and the second stator is an outer stator, wherein the first rotatable output shaft is driving connected to the second stator;
- and
- (c) a fan blade drivingly connected to the second rotatable output shaft.
A method of energizing a fan assembly provided in an air flow passage of a portable appliance, the fan assembly comprising a second motor having a second stator that is rotatably driven by a first rotatable output shaft of a first motor, the method comprising:
- (a) energizing the first motor;
- and,
- (b) subsequently energizing the second motor once the first rotatable output shaft of the first motor has commenced rotation,
- whereby rotation produced by each of the first motor and the second motor is constructively combined;
- and
- whereupon the first motor is energized and the second motor is subsequently automatically energized whereupon the fan assembly produces an air flow in the air flow passage.
A method of energizing a fan assembly provided in an air flow passage of a portable appliance, the fan assembly comprising a second motor having a second stator that is rotatably driven by a first rotatable output shaft of a first motor, the method comprising:
- (a) energizing the first motor;
- and,
- (b) subsequently energizing the second motor once the first rotatable output shaft of the first motor has commenced rotation,
- whereby rotation produced by each of the first motor and the second motor is constructively combined and
- wherein the first rotatable output shaft of the first motor and a second rotatable output shaft of the second motor each individually has a maximum rotational speed of at least 10,000 RPM and the second stator of the second motor is mounted to the first rotatable output shaft of the first motor for rotation with the first rotatable output shaft of the first motor, and the method further comprises energizing the first motor and rotating the first rotatable output shaft of the first motor and energizing the second motor and rotating the second rotatable output shaft of the second motor to at least 20,000 RPM.
Dependencies are inferred from the claim text.