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US 7,406,742 B2Granted
Vacuum device/blower
AssigneeAndreas Stihl AG & Co. KG
InventorsSteffen Joos, Uwe Gaese
Life of this patent
Estimating the term…
Abstract
An apparatus comprising a blower fan, a motor for driving the blower fan, a blower tube for conveying an air stream from the blower fan, and a potential compensation device that is electrically connected with the motor. The potential compensation device includes a charge compensation element having a free end that projects in an exposed manner into the air stream.
Claims19
An apparatus comprising:
- a blower fan,
- a motor for driving the blower fan, wherein the motor is a combustion engine,
- a blower tube for conveying an air stream from said blower fan, and
- a potential compensation device that is electrically connected with said motor, wherein said potential compensation device includes a charge compensation element, and wherein said charge compensation element has a free end that projects in an exposed manner into said air stream at a position that is spaced from said blower tube.
1 more element
An apparatus comprising:
- a blower fan,
- a motor for driving the blower fan,
- a blower tube for conveying an air stream from said blower fan, and
- a potential compensation device that is electrically connected with said motor, wherein said potential compensation device includes a charge compensation element, and wherein said charge compensation element has a free end that projects in an exposed manner into said air stream, wherein said potential compensation device further includes a potential compensation conductor, and wherein at least a portion of said potential compensation conductor extends on the inside of said blower tube, and wherein at least a portion of said potential compensation conductor is formed by a spring wire that in the region of a free end thereof is bent to form at least one support location that is retained in said blower tube.
1 more element
An apparatus comprising:
- a blower fan,
- a motor for driving the blower fan,
- a blower tube for conveying an air stream from said blower fan, and
- a potential compensation device that is electrically connected with said motor, wherein said potential compensation device includes a charge compensation element, and wherein said charge compensation element has a free end that projects in an exposed manner into said air stream, wherein said potential compensation device furthermore includes a potential compensation conductor, and wherein at least a portion of said potential compensation conductor is integrated into a wall of said blower tube.
1 more element
An apparatus comprising;
- a blower fan,
- a motor for driving the blower fan,
- a blower tube for conveying an air stream from said blower fan, and
- a potential compensation device that is electrically connected with said motor, wherein said potential compensation device includes a charge compensation element, and wherein said charge compensation element has a free end that projects in an exposed manner into said air stream, wherein said potential compensation device furthermore includes a potential compensation conductor, and wherein at least a portion of said potential compensation conductor extends on an outer side of said blower tube.
1 more element
Dependencies are inferred from the claim text.