Abstract: A fluid power operable actuating device, which possesses a flexible contractible tube extending between two spaced head pieces, such flexible contractible tube being caused to expand radially when its inner space is subjected to fluid pressure and transmitting simultaneously axial forces, due to contraction, to the head pieces. The flexible contractible tube comprises an elastically deforming flexible tube body which has a special geometrical shape having a cross sectional outline on the inner periphery and/or the outer periphery of the flexible tube body which is non-circular and/or is in the form of several portions of the body of the flexible tube with properties of the material of the flexible tube body which are different from one another.

Abstract: A method and a device for the identification of incorrectly orientated parts and/or parts departing from a predetermined master, the parts being moved by means of a conveyor means (13) past at least one camera (18) for registering the shapes of the parts. When there is a preset departure from stored masters values the respective part is identified as being faulty and/or removed. On the basis of image signals of the camera (18) corresponding to the shape of the respective part a plurality of criteria are derived such as overall length, overall height, area, axial position, surface waviness, position of center of gravity. Such individual compared with the corresponding individual criteria derived from at least one master part. This means that with a relatively small memory requirement the parts may be reliably identified and more particularly significant fine structures may be distinguished.

Abstract: A fluid power operable actuating means, which possesses a flexible contractible tube (2) extending between two spaced head pieces. such flexible contractible tube being caused to expand radially when its inner space is subjected to fluid pressure and transmitting simultaneously axial forces, due to contraction, to the head pieces. The flexible contractible tube (2) comprises an elastically deforming flexible tube body (5) which is provided with supporting means contributing to increasing its strength and/or to transmitting force. The supporting means are in a form with a special geometrical shape having a cross sectional outline on the inner periphery (15) and/or the outer periphery (16) of the flexible tube body (5) which is non-circular and/or such supporting means are in the form of several portions of the body of the flexible tube (5) with properties of the material of the flexible tube body which are different from one another.

Abstract: A fluid power rotary drive having two head pieces, between which a hose body and a force transmitting structure extend. The head pieces bear against each other via supporting means permitting relative rotatability thereof in Abstract of the Disclosure such a manner that they are prevented from performing an axial relative movement involving mutual motion toward or away from the one another. When the interior space of the hose body is put under pressure a relative rotary movement between the two head pieces is caused.