Patent ID: 9700126
Date: 2017-07-11
CPC Classifications: A46B,E01H,F16B

Claim:
1. A mounting device for a drum comprising at least two joined drum segments as a part of a shaft of a brush roller, said mounting device including an internal circumferentially directed shoulder being a part of a first drum segment and an external circumferentially directed shoulder being a part of a second drum segment, said internal circumferentially directed shoulder and said external circumferentially directed shoulder being provided with cooperating contact surfaces mainly positioned in a circumferential or tangential direction with respect to the drum, the external circumferentially directed shoulder being provided with a radial directed through hole intended to involve a screw having a threaded end, the screw also going through the internal circumferentially directed shoulder and the threaded end being directed towards a geometrical rotation axis of the drum, wherein the interior circumferentially directed shoulder is provided with a recess having a bottom and an opening facing the geometrical rotation axis and the recess is designed with plain inner side surfaces facing each other and being parallel and axial with respect to the drum, and the recess is equipped with projections tangentially and circumferentially originating from each one of said plain inner side surfaces and pointing to each other.