Dust removal system for a handheld power tool

Patent metadata

Field	Value
Publication number	US-9656361-B2
Application number	US-201414891899-A
Country	US
Kind code	B2
Filing date	May 14, 2014
Priority date	May 17, 2013
Publication date	May 23, 2017
Grant date	May 23, 2017

Abstract

A dust removal system handheld power tool includes a fan ( 18 ) to generate an air flow ( 19 ), a suction nozzle ( 27 ) to capture dust-laden air from a tool ( 4 ), and a collecting container ( 22 ) to collect the dust. The collecting container ( 22 ) has a suction opening ( 27 ) connected to the suction nozzle ( 27 ) as well as an exhaust opening ( 28 ) connected to the fan ( 18 ). A filter ( 29 ) serves to separate dust into the collecting container ( 22 ) and is arranged so as to cover the exhaust opening ( 28 ). The filter ( 29 ) has several consecutive fins ( 18 ) arranged one beside the other in a direction (y) that is perpendicular to the direction (z) of the air flow ( 19 ). The fins ( 18 ) are slanted with respect to each other. The slant ( 42 ) of the fins ( 44 ) reduces the adhesion of the dust to the fins ( 44 ).

First claim

What is claimed is:

1. A dust removal system for a handheld power tool, the dust removal system comprising:
a fan to generate an air flow;
a suction nozzle to capture dust-laden air from a tool;
a collecting container to collect dust from the dust-laden air, the collecting container having a suction opening connected to the suction nozzle and an exhaust opening connected to the fan; and
a filter serving to separate the dust into the collecting container, the filter arranged so as to cover the exhaust opening, the filter having several consecutive fins arranged one beside the other in a direction perpendicular to the direction of the air flow, the fins being slanted with respect to each other;
wherein the fins are attached in a frame bendable in the direction of the air flow and the frame is placed on a pedestal convexly elevated opposite to the direction.

2. The dust removal system as recited in claim 1 wherein an end face of the filter exposed to the flow has a product of a length and a width of the filter at the end face less than 10% greater than another product of another length and another width of another end face of the filter facing away from the flow.

3. The dust removal system as recited in claim 1 wherein the pedestal has a guide slanted in the direction of the air flow, whereby one of the fins is placed onto the guide.

4. The dust removal system as recited in claim 1 wherein the outermost fins are slanted with respect to each other by 3 degrees to 10 degrees.

Assignees

• Hilti Ag

Inventors

• Appel Hans
• Wahle Quirin

Classifications

• A47L9/102

  Dust separators (cyclones A47L9/16) · CPC title

• A47L9/122

  flat · CPC title

• A47L5/22

  with rotary fans · CPC title

• A47L9/12

  Dry filters · CPC title

• B23Q11/0071 Primary

  dust collectors for hand tools · CPC title