By means of the operating body (102) the friction element can be brought into frictional engagement with the friction portion (22).

The traction friction mechanism (F1) has a friction member (70).

Said tightening device is characterised in that at least one friction element (5 or 6) is provided with a friction surface (8) which precludes said elements to cling to each other.

This can be achieved by utilizing a friction element that has frustoconical shaped friction surfaces.

The present invention also describes a frictionally acting device having a friction part (2) of said type.

The invention concerns a smooth engagement element (29) of a clutch friction disc (10), in particular for a motor vehicle, consisting, at least partly, in a silicone addition.

The invention also relates to a related siding element.

Connecting element (1) for connecting two components of a partition wall, comprising two clamping flanges (2, 3) interconnected by a connecting rod (4).

A hose protector (1) for placing around a hose (3) with even intervals, which reduces friction and wear on the hose (3).

A closure element for a container of fluids.

The invention concerns an element with expansible relief.

Auxiliary element for a latch release pusher.

The present invention relates to a cutting insert for a rock drill bit.

Multinational Advisory Police Element

A flexible, impervious and incinerable single-use covering (Fig. 1) for a conventional bedpan is disclosed.