Axial blower vacuum

Patent metadata

Field	Value
Publication number	US-2016195097-A1
Application number	US-201614988976-A
Country	US
Kind code	A1
Filing date	Jan 6, 2016
Priority date	Jan 6, 2015
Publication date	Jul 7, 2016
Grant date	—

Abstract

A blower vacuum includes a housing having a wall that extends between a first opening and a second opening, and a fan positioned at least partially within the housing and rotatable about a fan axis that extends between the first opening and the second opening. A motor is positioned outside of the housing and is rotatable about a motor axis that is offset from the fan axis. The motor is operable in a first direction to rotate the fan in a first direction to produce an air flow from the first opening to the second opening and operable in a second direction to rotate the fan in a second direction to produce an air flow from the second opening to the first opening.

First claim

What is claimed is:

1 . A blower vacuum comprising:
a housing including a wall that extends between a first opening and a second opening; a fan positioned at least partially within the housing and rotatable about a fan axis that extends between the first opening and the second opening; a motor positioned outside of the housing and rotatable about a motor axis that is offset from the fan axis, the motor operable in a first direction to rotate the fan in a first direction to produce an air flow from the first opening to the second opening and operable in a second direction to rotate the fan in a second direction to produce an air flow from the second opening to the first opening.

2 . The blower vacuum of claim 1 , wherein the fan includes a first stage and a second stage and wherein the first stage and the second stage are mounted on a common shaft for co-rotation.

3 . The blower vacuum of claim 1 , further comprising a transmission disposed between the motor and the fan and operable to transmit the rotation of the motor to rotation of the fan.

4 . The blower vacuum of claim 3 , wherein the transmission includes a belt that interconnects the motor and the fan.

5 . The blower vacuum of claim 4 , wherein the fan includes an outer hub having a recessed portion and two raised edges arranged to receive the belt.

6 . The blower vacuum of claim 4 , wherein the fan includes an outer hub arranged to receive the belt and having a hub diameter, and wherein the motor includes a drive member arranged to receive the belt and having a drive member diameter, and wherein the drive member diameter is smaller than the hub diameter such that the fan rotates at a speed that is slower than a speed of the motor.

7 . The blower vacuum of claim 1 , further comprising a plurality of guide vanes positioned downstream of the fan.

8 . A blower vacuum comprising:
an elongated housing having an outer wall that extends between a first opening and a second opening, the outer wall defining a housing interior and a housing exterior; a fan including a first stage and a second stage, the fan positioned at least partially within the housing interior and rotatable about a fan axis that extends between the first opening and the second opening; a motor positioned in the housing exterior and rotatable about a motor axis that is offset from the fan axis, the motor operable in a first direction to rotate the fan in a first direction to produce an air flow from the first opening to the second opening and operable in a second direction to rotate the fan in a second direction to produce an air flow from the second opening to the first opening.

9 . The blower vacuum of claim 8 , wherein the first stage and the second stage are mounted on a common shaft for co-rotation.

10 . The blower vacuum of claim 8 , further comprising a transmission disposed between the motor and the fan and operable to transmit the rotation of the motor to rotation of the fan.

11 . The blower vacuum of claim 10 , wherein the transmission includes a belt that interconnects the motor and the fan.

12 . The blower vacuum of claim 11 , wherein the fan includes an outer hub having a recessed portion and two raised edges arranged to receive the belt.

13 . The blower vacuum of claim 11 , wherein the fan includes an outer hub arranged to receive the belt and having a hub diameter, and wherein the motor includes a drive member arranged to receive the belt and having a drive member diameter, and wherein the drive member diameter is smaller than the hub diameter such that the fan rotates at a speed that is slower than a speed of the motor.

14 . The blower vacuum of claim 8 , further comprising a plurality of guide vanes positioned downstream of the fan second stage.

15 . A blower vacuum comprising:
an elongated housing having an outer wall that extends between a first opening and a second opening, the outer wall defining a housing interior and a housing exterior; a fan including a plurality of interior fan blades and a plurality of exterior fan blades, the fan positioned at least partially within the housing interior and rotatable about a fan axis that extends between the first opening and the second opening; a motor positioned in the housing interior and rotatable about the fan axis, the motor operable in a first direction to rotate the fan in a first direction to produce an air flow from the first opening to the second opening and operable in a second direction to rotate the fan in a second direction to produce an air flow from the second opening to the first opening, wherein operation of the motor in a first direction produces a first air stream that passes through the motor and a second separate air stream that passes outside of the motor.

16 . The blower vacuum of claim 15 , wherein the plurality of interior fan blades produce the first air stream in response to rotation of the fan.

17 . The blower vacuum of claim 16 , wherein the plurality of exterior fan blades produce the first air stream in response to rotation of the fan.

18 . The blower vacuum of claim 15 , wherein the motor includes a housing having an inlet aperture and an outlet aperture, and wherein the first air stream enters the inlet aperture and exits the outlet aperture.

19 . The blower vacuum of claim 15 , wherein the first air stream merges with the second air stream after exiting the outlet aperture.

20 . The blower vacuum of claim 15 , further comprising a plurality of guide vanes positioned downstream of the fan and exterior to the motor, the guide vanes positioned to receive the second air stream.

Assignees

• Techtronic Ind Co Ltd

Inventors

• Patrick Robert Andrew

Classifications

• F04D29/545

  Ducts · CPC title

• F04D25/082

  the unit having provision for cooling the motor · CPC title

• F04D25/08

  the working fluid being air, e.g. for ventilation · CPC title

• A47L5/24 Primary

  Hand-supported suction cleaners · CPC title

• F04D19/005

  reversible fans · CPC title