Dust extraction device
AssigneeHilti Aktiengesellschaft
InventorsFrank Despineux, Oliver Ohlendorf
Life of this patent
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Abstract
A dust extraction device for a machine hand tool is provided. The dust extraction device includes an outer tube arranged about an axis, the outer tube being closed on the first axial end thereof by a wall. An opening is provided for a pump connection, the opening being arranged in a position neighboring the wall in a shell wall of the outer tube. An attachment feature is provided having a sheath-like shape and arranged on the side of the wall which lies opposite the outer tube in an axial extension of the outer tube. An inner tube is arranged inside the outer tube about the axis, and penetrates the wall. A length of the inner tube inside the outer tube is at least half of the length of the outer tube.
Claims9
A dust extraction device for a machine hand tool, the dust extraction device comprising:
- an outer tube arranged about an axis, the outer tube being closed on a first axial end by a wall;
- an opening for a pump connection, the opening being arranged in a position neighboring the wall of the outer tube in a shell wall of the outer tube;
- an attachment feature with a sheath-like shape, the attachment feature being arranged on an opposite side of the wall than the outer tube in an axial extension of the outer tube;
- and
- an inner tube arranged inside the outer tube about the axis, wherein the inner tube penetrates the wall of the outer tube, and a length of the inner tube inside the outer tube is at least half of the length of the outer tube.
A dust extraction device for a machine hand tool, the dust extraction device comprising:
- an inner tube that is positionable cylindrically around a tool of a machine tool, wherein said inner tube has a first diameter;
- an outer tube arranged cylindrically around said inner tube, wherein said outer tube has a second diameter substantially greater than said first diameter;
- a wall formed between said inner tube and said outer tube at a first axial end of said inner tube and said outer tube;
- and
- an opening positioned to allow the passage of air-borne dust from a second axial end of said outer tube opposite said wall to said opening, wherein said passage of said air-borne dust is between said inner tube and said outer tube to said opening.
Dependencies are inferred from the claim text.