US 12,092,247 B2
Suction-extraction attachment
Stefan Sonntag, Vogt (DE); Andreas Schurig, Lyss (CH); Christian Schaber, Bern (CH); Melanie Wassmer, Aarau (CH); Nikola Janjic, Bellach (CH); Xiao Qiu, Weingarten (DE); and Achim Duesselberg, Kirchheim Unter Teck (DE)
Assigned to Robert Bosch GmbH, Stuttgart (DE)
Filed by Robert Bosch GmbH, Stuttgart (DE)
Filed on Jun. 30, 2021, as Appl. No. 17/363,454.
Claims priority of application No. 10 2020 208 392.4 (DE), filed on Jul. 3, 2020.
Prior Publication US 2022/0003345 A1, Jan. 6, 2022
Int. Cl. F16L 33/18 (2006.01); B23Q 11/00 (2006.01)
CPC F16L 33/18 (2013.01) [B23Q 11/0046 (2013.01); B23Q 11/0071 (2013.01)] 12 Claims
OG exemplary drawing
 
1. A fastening device for a suction hose, comprising:
a main body;
a first fastening interface having a first fastening structure that is substantially cylindrical and configured to detachably fasten to an auxiliary handle of a handheld power tool so as to detachably fasten the main body to the auxiliary handle;
a second fastening interface configured to detachably fasten the suction hose to the fastening device, the second fastening interface configured to receive an intermediate portion of the suction hose that is between a first end region and a second end region of the suction hose; and
a joint unit that pivotally connects the first fastening interface to the second fastening interface such that when the auxiliary handle is fastened to the main body and the suction hose is fastened to the second fastening interface, the suction hose is pivotable relative to the auxiliary handle about the joint unit,
wherein the joint unit is spaced apart from the first fastening structure,
wherein the first fastening interface defines two passage openings through which the first fastening structure extends,
wherein the first fastening interface defines a first cutout between the two passage openings and through which the first fastening structure passes and in which the auxiliary handle is partially arranged when the auxiliary handle is fastened to the first fastening structure,
wherein the first fastening interface further comprises an operating element via which the first fastening structure is rotated relative to the two passage openings, and
wherein the first fastening interface defines a second cutout in which an annular diameter enlargement of the first fastening structure is arranged so as to axially secure the first fastening structure relative to the main body.