Blower

Patent metadata

Field	Value
Publication number	US-9587648-B2
Application number	US-201615003579-A
Country	US
Kind code	B2
Filing date	Jan 21, 2016
Priority date	Jan 21, 2015
Publication date	Mar 7, 2017
Grant date	Mar 7, 2017

Abstract

A blower has a blower tube and a fan unit that conveys an air flow through the blower tube. The fan unit has a fan having a fan axis. The fan conveys the air flow in the direction of the fan axis. The air flow exits the blower tube in an outflow direction at a tube aperture. The handle has on its lower side a grasping point, which in the operating position of the blower, lies on a vertical axis through the blower's center of gravity. The tube aperture has a center axis that is oriented in the outflow direction. So that the forces received by the user at the handle during operation can be made smaller, it is provided for the spacing from the center axis of the tube aperture to the grasping point to be smaller than the spacing from the fan axis to the grasping point.

First claim

What is claimed is:

1. A blower comprising:
a blower tube;
a fan unit configured to convey an air flow through said blower tube during operation of the blower;
said fan unit including a fan defining a fan axis;
said fan being configured to convey said air flow in the direction of said fan axis;
said blower tube having a blower tube aperture through which the air flow flows out of said blower tube in a tube outflow direction;
a handle having a lower side facing said fan and a grasping point arranged on said lower side;
the blower having an operating position and a center of gravity;
said grasping point being disposed on a vertical axis through said center of gravity when the blower is in said operating position;
said blower tube aperture defining a center axis oriented in said tube outflow direction;
said center axis and said grasping point conjointly defining a spacing (a) between each other;
said fan axis and said grasping point conjointly defining a spacing (b) between each other; and,
said spacing (a) being smaller than said spacing (b).

2. The blower of claim 1 , wherein said center axis extends below said grasping point when the blower is in said operating position.

3. The blower of claim 1 , wherein said center axis of said blower tube aperture and said fan axis conjointly enclose an angle (α) of at least 3°.

4. The blower of claim 1 , wherein;
said fan is configured to convey said air flow in a fan outflow direction running parallel to said fan axis; and,
said blower tube has a deflection section configured to redirect said air flow from said fan outflow direction to said tube outflow direction.

5. The blower of claim 4 , wherein said blower tube runs in an inflected manner in said deflection section.

6. The blower of claim 4 , wherein:
said blower tube has a straight section having a length (c);
said deflection section is arranged between said straight section and said fan with respect to the flow direction of said air flow;
said deflection section has a length (d); and,
said length (c) is at least half as long as said length (d).

7. The blower of claim 4 , wherein:
said fan has a downstream end face; and,
said deflection section adjoins said downstream end face of said fan.

8. The blower of claim 1 , wherein said handle is arranged above said fan when the blower is in said operating position.

9. The blower of claim 1 further comprising:
an intake channel defining a longitudinal center axis;
said fan is configured to draw in an air flow via said intake channel; and,
said longitudinal center axis and said fan axis conjointly enclose an angle (β) of greater than 0°.

10. The blower of claim 1 further comprising:
a rigid housing;
said blower tube and said handle being formed on said rigid housing; and,
said fan unit being arranged in said rigid housing.

11. The blower of claim 1 , wherein said fan unit includes a drive motor configured as an electrical motor and arranged in said blower tube.

12. The blower of claim 1 , wherein:
said handle has a first section defining a first longitudinal center axis and a second section defining a second longitudinal center axis; and,
said first longitudinal center axis and said second longitudinal center axis conjointly enclose an angle (γ) of greater than 0°.

13. The blower of claim 12 , wherein said angle (γ) lies in a range from approximately 15° to approximately 45°.

14. The blower of claim 12 , wherein:
said first section of said handle is arranged closer to said blower tube aperture than said second section;
said first section of said handle and said center axis of said blower tube aperture conjointly enclose a first angle (δ 1 );
said second section of said handle and said center axis of said blower tube aperture conjointly enclose a second angle (δ 2 ); and,
said first angle (δ 1 ) is smaller than said second angle (δ 2 ).

15. The blower of claim 1 further comprising:
at least one operator-controlled element arranged on said handle in a first longitudinal section;
said handle defining a longitudinal center axis; and,
said longitudinal center axis in said first longitudinal section and said center axis of said blower tube aperture conjointly enclosing an angle (δ 3 ) lying in a range from approximately 20° to approximately 45°.

Assignees

• Stihl Ag & Co Kg Andreas

Inventors

• Barth Christian
• Hittmann Markus
• Gindele Cornelius

Classifications

• E01H2001/0881

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