In this manner the risk of the disc spring-centring pin failing, for example, due to fracture, can be reduced, whereby the operational stability of the friction clutch can be improved.

spring-centered type directional control valve

The centring spring (45) is coaxially arranged within the delimiting spring (40).

Deflection of the deflectable post is controlled by a centering spring or axial spring.

A centering spring retains the slide in closing position.

The cover (24) has a sloped section (24g) which is in contact with the outer centering spring (19) and protrudes to the outer centering spring (19) side.

A centring spring (45) co-operates with the delimiting spring (40) to centre the steering valve (16).

The adjustable cover is self centering by means of an integral spring apparatus.

The inner end of the flat spiral spring is bent into a loop through which a centering pin of the spring housing passes.

The adjustable centering sleeve (3) or the adjustable center bolt is loaded by a flexible spring device (14) against a stop (4 and/or 7) to the fixed part, the center bolt (16), or the centering sleeve.

A corresponding recess (10) is formed in the leaf spring part of the centering spring (5).

A centering spring (12) is provided between the inner rotary member (1) and the holder (4).

The lever-side clutch section is provided with a retainer and an inner centering spring.

The turntable comprises a centering element (8) comprising a cone-shaped centering portion (12), which centering element is rotatable about an axis of rotation and is movable in axial direction against a spring force.

The centering spring acts to center the shaft when no external forces operate on the shaft.