US Patent 10946536 Rotary shaver having a disc-shaped element

A rotary shaver 1 comprises at least an external cutting element 7 and a disc-shaped element 10. The disc-shaped element covers at least part of the external cutting element. The external cutting element is at least provided with a passage 11. The disc-shaped element is at least provided with a pen 17 having a length, which pen is press-fitted in the passage. Between a wall 22 of the passage and the pen at least one vent 21 extends at least along the length of the pen. The pen is provided with at least three ribs 19 extending parallel to a central axis of the pen, wherein the at least one vent is located between adjacent ribs and the wall of the passage.