US 12,454,015 B2
Sealing lip on tool fitting
Udo Hauptmann, Landsberg (DE); and Ulrich Mandel, Buchloe Honsolgen (DE)
Assigned to Hilti Aktiengesellschaft, Schaan (LI)
Appl. No. 17/619,775
Filed by Hilti Aktiengesellschaft, Schaan (LI)
PCT Filed Jun. 30, 2020, PCT No. PCT/EP2020/068375
§ 371(c)(1), (2) Date Dec. 16, 2021,
PCT Pub. No. WO2021/004834, PCT Pub. Date Jan. 14, 2021.
Claims priority of application No. 19185763 (EP), filed on Jul. 11, 2019.
Prior Publication US 2022/0355389 A1, Nov. 10, 2022
Int. Cl. B23B 31/00 (2006.01); B25D 17/08 (2006.01)
CPC B23B 31/001 (2013.01) [B25D 17/088 (2013.01); B23B 2231/28 (2013.01); B25D 2217/0069 (2013.01); B25D 2250/365 (2013.01); Y10T 279/17076 (2015.01); Y10T 279/3493 (2015.01)] 16 Claims
OG exemplary drawing
 
1. A tool fitting device for a power tool, the tool fitting device comprising:
a holder for receiving and holding a tool shank;
a retainer extending at least around a section or sections of the holder; and
a dust protector for preventing the penetration of dust into the tool fitting device, the dust protector including at least one first dust stripper, at least one fixing bead having a radial length configured to extend radially into the holder, and at least one sealing lip, the sealing lip being positioned in front of the retainer in the axial direction, the sealing lip bearing against a surface of the holder, wherein the sealing lip is configured with respect to the fixing bead so as to define a free space between the fixing bead and the sealing lip along the outer surface of the holder, the holder not extending into the free space.