The connection struts (128) link the separated parts (124) of the adjacent wave-shaped struts (122).

Torque-transmitting struts (92, 94) are positioned in the strut pockets.

The spacers in the first set of spacers are shorter than the spacers in the second set of spacers.

The first webs (6) are of simple construction, the second webs (7) are of double construction each with a cavity (10) between the webs (7).

contracted heart tension in the struts

The members have flattened ends.

The gap (15) between the struts (13) is greater than the width of said struts (13).

Parallel trusses (7202) may be interconnected by two or more lateral trusses (7201) and eccentricities may be incorporated into the trusses.

The struts (25, 26) comprise so-called tapered struts (26) which each have a tapered design.

Brake shoes (76) are engageable with the struts to prevent longitudinal strut movement.

Here, the spacer elements are secured movably on the two bearing blocks which lie opposite one another.

The struts are of substantially the same length.

The struts are formed of a solid surfactant material.

Conductive traces may extend through the spacers.

Support webs (18) into which the connecting members (16) extend are formed on the webs (17) of the friction ring (12).