Abstract: A centrifugal impeller for a blower has a base plate, a cover plate, and a plurality of curved blades mounted between the base plate and the cover plate. The base plate and the cover plate have blade mounting portions including a plurality of mounting holes. Cover plate mounting portions and base plate mounting portions project from each blade and engage with the mounting holes of the cover plate and base plate, respectively. The mounting holes of the cover plate include first mounting holes arranged outwardly from a central region. The first mounting holes have a circular shape. The cover plate mounting portions of each blade include first mounting protrusions engaged with the first mounting holes.

Abstract: An air blower includes an impeller, a motor and a blower housing. The blower housing includes a first housing member for receiving the motor and a second housing member for receiving the impeller. The first and second housing members are mounted to each other. Two opposed air outlets are formed at an end of the first housing member remote from the second housing member. Each air outlet is formed by an outwardly inclined cutout. The cutout is bounded by two inclined sides. An angle A formed by each inclined side and an axial direction of the blower is in the range from 0 to 45 degrees. Radial lines extending from one inclined side of one air outlet and the adjacent inclined side of the other air outlet form an angle B in the range from 15 to 45 degrees.

Abstract: A blower has a centrifugal impeller driven by an electric motor. The centrifugal impeller has a base plate, a cover plate defining an air inlet, a plurality of blades mounted between the base plate and the cover plate, and a reinforcement ring mounted to the cover plate around the air inlet. The cover plate includes an outwardly extending flange at the air inlet. The reinforcement ring has a flange fitted around the flange of the cover plate. Each blade has cover plate mounting portions and base plate mounting portions. The cover plate has blade mounting holes engaged with the cover plate mounting portions. The base plate has blade mounting holes engaged with the base plate mounting portions. The reinforcement ring increases the strength of the cover plate, to avoid breakage under high speed rotation.

Abstract: An electric pump has a pump body, a pump magnet received in the pump body, an impeller received in the pump body and fixed to the pump magnet, and a disc type electric motor. The electric motor includes a stator, disc type coils fixed to a surface of the stator, a rotor rotatably positioned above the coils, and a circuit board electrically connected to the coils. The rotor has a rotor magnet positioned beneath the pump body and magnetically coupled to the pump magnet. When the coils are energized, an axial magnetic field is generated to drive the rotor and, through the magnetic coupling between the rotor magnet and the pump magnet, rotate the impeller.

Abstract: An air blower includes an impeller, a motor and a blower housing. The blower housing includes a first housing member for receiving the motor and a second housing member for receiving the impeller. The first and second housing members are mounted to each other. Two opposed air outlets are formed at an end of the first housing member remote from the second housing member. Each air outlet is formed by an outwardly inclined cutout. The cutout is bounded by two inclined sides. An angle A formed by each inclined side and an axial direction of the blower is in the range from 0 to 45 degrees. Radial lines extending from one inclined side of one air outlet and the adjacent inclined side of the other air outlet form an angle B in the range from 15 to 45 degrees.

Abstract: A centrifugal impeller for a blower has a base plate, a cover plate, and a plurality of curved blades mounted between the base plate and the cover plate. The base plate and the cover plate have blade mounting portions including a plurality of mounting holes. Cover plate mounting portions and base plate mounting portions project from each blade and engage with the mounting holes of the cover plate and base plate, respectively. The mounting holes of the cover plate include first mounting holes arranged outwardly from a central region. The first mounting holes have a circular shape. The cover plate mounting portions of each blade include first mounting protrusions engaged with the first mounting holes.

Abstract: A blower has a centrifugal impeller driven by an electric motor. The centrifugal impeller has a base plate, a cover plate defining an air inlet, a plurality of blades mounted between the base plate and the cover plate, and a reinforcement ring mounted to the cover plate around the air inlet. The cover plate includes an outwardly extending flange at the air inlet. The reinforcement ring has a flange fitted around the flange of the cover plate. Each blade has cover plate mounting portions and base plate mounting portions. The cover plate has blade mounting holes engaged with the cover plate mounting portions. The base plate has blade mounting holes engaged with the base plate mounting portions. The reinforcement ring increases the strength of the cover plate, to avoid breakage under high speed rotation.

Abstract: A vacuum cleaner has a brush roll which has a housing. A motor is disposed within the housing and has a pulley mounted on a shaft of the motor. A roller is disposed within the housing and has a drive wheel. A belt couples the pulley to the drive wheel, so that the motor can drive the roller. The roller has bristles for sweeping a surface to be cleaned.