Abstract: The invention relates to a fluid-operated clutch and provides a clutch operating thrust bearing which is formed with a generally stirrup-shaped casing which may be located in position on a sleeve co-axial with the driving and driven shafts by simple engagement.

Abstract: The invention relates to a mechanically-operated disc-brake of the kind comprising a disc fast for rotation with the member to be braked, a fixed support, two brake-shoes arranged one on each side of the disc and slidably mounted in housings formed in the fixed support, an operating lever co-operating with one of the brake-shoes through a cam surface, and a transfer member on which the operating lever is articulated, and which is movable with respect to the disc for transmission to the other brake-shoe of the braking action applied by the operating lever, the transfer member being pivotally mounted with respect to the fixed support against the action of elastic devices, and further comprising structure enabling the transfer member to pivot about an axis which is substantially diametral with respect to the disc, the articulation axis of the operating lever on the transfer member extending along a direction substantially parallel to the diametral axis.