Vacuum cleaning device

Patent metadata

Field	Value
Publication number	US-11517158-B2
Application number	US-201916565085-A
Country	US
Kind code	B2
Filing date	Sep 9, 2019
Priority date	Sep 10, 2018
Publication date	Dec 6, 2022
Grant date	Dec 6, 2022

Abstract

A dust extraction device for a hand-held power tool includes a housing, a mechanical interface for releasably connecting the dust extraction device to the hand-held power tool, a dust-collecting chamber which is connected to a filter unit, and a filter-cleaning unit. The filter-cleaning unit has an impact element which is mounted moveably in and/or on the housing of the dust extraction device. The impact element is designed to act upon the filter unit directly with an impact-like force.

First claim

The invention claimed is:

1. A dust extraction device for a hand-held power tool, comprising:
a housing;
a mechanical interface configured to releasably connect the dust extraction device to the hand-held power tool;
a filter unit having a filter element formed of a filter material that filters dust;
a dust-collecting chamber connected to the filter unit; and
a filter-cleaning unit including an impact member mounted moveably in and/or on the housing of the dust extraction device, the impact member configured to act directly upon the filter material in a contact region with an impact-like force, wherein:
the dust extraction device includes an air inlet and an air outlet, and an airflow path is defined from the air inlet to the air outlet, and
the impact member has at least one air transport channel through which the airflow path passes.

2. The dust extraction device according to claim 1 , wherein the filter-cleaning unit comprises a resetting spring that acts upon the impact member with a force in a direction toward the filter unit.

3. The dust extraction device according to claim 1 , wherein the filter-cleaning unit comprises an actuating member that is mechanically coupled to the impact member and configured for actuation of the impact member.

4. The dust extraction device according to claim 3 , wherein an actuating axis of the actuating member and a movement axis of the impact member are parallel to and spaced apart from one another.

5. A dust extraction device for a hand-held power tool, comprising:
a housing;
a mechanical interface configured to releasably connect the dust extraction device to the hand-held power tool;
a filter unit having a filter element formed of a filter material that filters dust;
a dust-collecting chamber connected to the filter unit; and
a filter-cleaning unit including an impact member mounted moveably in and/or on the housing of the dust extraction device, the impact member configured to act directly upon the filter material in a contact region with an impact-like force,
wherein the filter-cleaning unit comprises an actuating member that is mechanically coupled to the impact member and configured for actuation of the impact member,
wherein an actuating axis of the actuating member and a movement axis of the impact member are parallel to and spaced apart from one another, and
wherein the actuating member includes a plurality of teeth arranged circumferentially around the actuating member, the plurality of teeth configured to engage a stop of the impact member and, upon actuation of the actuating member, disengage from the stop such that the force of a resetting spring biases the impact member into contact with the filter unit.

6. The dust extraction device according to claim 5 , wherein the impact member is arranged between the filter unit and the resetting spring.

7. The dust extraction device according to claim 5 , wherein the actuating member is configured for manual actuation and has an operator control surface.

8. The dust extraction device according to claim 7 , wherein the operator control surface is arranged on a lateral side of the housing.

9. The dust extraction device according to claim 5 , wherein the actuating member is actuated automatically.

10. The dust extraction device according to claim 9 , wherein the actuating member is configured such that the actuating member is automatically actuated during connection of the dust extraction device to the hand-held power tool.

11. The dust extraction device according to claim 9 , wherein the actuating member is configured such that the actuating member is automatically actuated during a drilling operation of the hand-held power tool.

12. The dust extraction device according to claim 5 , wherein the filter unit comprises a filter frame configured to connect the filter unit to the dust-collecting chamber.

13. The dust extraction device according to claim 5 , wherein the filter element includes filter pockets that are triangularly shaped.

14. The dust extraction device according to claim 5 , wherein:
the filter unit comprises an elastic sealing element arranged between the filter unit and at least one of the dust-collecting chamber and the housing of the dust extraction device, and
the sealing element is compressed in a mounted state of the filter unit.

15. The dust extraction device according to claim 14 , wherein:
the filter unit comprises a filter frame configured to connect the filter unit to the dust-collecting chamber, and
the sealing element and the filter frame are formed in one piece.

Assignees

• Bosch Gmbh Robert

Inventors

• Bayha Tobias
• Meiser Charlotte
• Schmid Hardy
• Blind Jan-Simon
• Kaiser Joerg
• Wall Michael
• Maier Ralf
• Habermann Rudi
• Schart Simon

Classifications

• B23Q11/0071

  dust collectors for hand tools · CPC title

• B08B15/04

  from a small area, e.g. a tool {(removing chips B23Q11/0042)} · CPC title

• B25D17/00

  Details of, or accessories for, portable power-driven percussive tools {(details or components, e.g. casings, bodies, of portable power-driven tools not particularly related to the operation performed B25F5/00)} · CPC title

• B25F5/00 Primary

  Details or components of portable power-driven tools not particularly related to the operations performed and not otherwise provided for · CPC title

• A47L7/0095 Primary

  Suction cleaners or attachments adapted to collect dust or waste from power tools · CPC title