US2022125258A1PendingUtilityA1

Dust Removal Device and Method for Changing a Filter Element in a Dust Removal Device

Assignee: HILTI AGPriority: Feb 5, 2019Filed: Jan 27, 2020Published: Apr 28, 2022
Est. expiryFeb 5, 2039(~12.5 yrs left)· nominal 20-yr term from priority
A47L 9/10A47L 5/365A47L 9/122A47L 9/22
49
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Claims

Abstract

A dust removal device includes a suction head and at least one filter element. The at least one filter element is disposed obliquely within the dust removal device such that floating mounting of the suction head is maintained by automatic, vacuum-induced suction on the at least one filter element. A method for changing a filter element in a dust removal device includes replacing a filter element from above.

Claims

exact text as granted — not AI-modified
1 .- 6 . (canceled) 
     
     
         7 . A dust removal device, comprising:
 a suction head; and   at least one filter element;   wherein the at least one filter element is disposed obliquely within the dust removal device such that floating mounting of the suction head is maintained by automatic, vacuum-induced suction on the at least one filter element.   
     
     
         8 . The dust removal device as claimed in  claim 7 , wherein the at least one filter element comprises two filter elements and wherein the two filter elements are disposed in a V shape. 
     
     
         9 . The dust removal device as claimed in  claim 8 , wherein the two filter elements are disposed within the dust removal device such that respective filter sides of the two filter elements face one another and wherein a lower spacing between the two filter elements is smaller than an upper spacing between the two filter elements. 
     
     
         10 . The dust removal device as claimed in  claim 7 , wherein an oblique position of the at least one filter element is defined by an angle formed by a central axis which extends substantially centrally through the dust removal device and by an axis which extends through the at least one filter element. 
     
     
         11 . The dust removal device as claimed in  claim 10 , wherein the angle is in a range between 2° and 60°. 
     
     
         12 . A method for changing a filter element in a dust removal device, comprising the steps of:
 a) opening an upper part of the dust removal device and thus exposing an interior of the dust removal device and making a first filter element of the dust removal device accessible;   b) removing the first filter element from the interior of the dust removal device, wherein the removing of the first filter element is performed from above; and   c) inserting a second filter element into the interior of the dust removal device, wherein the inserting of the second filter element is performed from above, after step b).

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