Abstract: In a powered member, a device for attaching each end of a flexible tubular chamber to a head of a nipple is formed by a pair of cylindrical bushings interconnected by means of a tenon and mortise joint which are located in the casing and define a central passage having its axis aligned with the axis of the casing. Walls of the passage in a plane drawn in parallel with the longitudinal axis of the casing are in the form of a pair of truncated cones having their larger bases facing towards each other. One generatrix of the conical surface of the passage extends substantially in parallel with generatrix of one conical passage of the head of the nipple and the other generatrix of the passage extends substantially in parallel with the generatrix of the other conical passage of the head of the nipple.

Abstract: A device for building up directional force comprises an even number of tubular vessels (1) made of elastic material and adapted for communicating with a pressure fluid medium source, and a rigid rectilinear pivot (8) with flat bevels (19) which is positioned between the tubular vessels (1) so that the tubular vessels (1) are located symmetrically with respect to the geometrical axis (9) of said pivot (8). Provision is made for puncheons (10) adjoining the outside surface of the tubular vessel (1) and positioned diametrically opposite relative to the axis (9) of the pivot (8), with their inside surfaces (12) facing the surfaces (20) of the pivot (8), which adjoin the outside surfaces of the tubular vessels (1).

Abstract: Disclosure is made of a power unit wherein a housing is made split along its longitudinal axis. A tubular elastic vessel is internally coaxially accommodated in the housing. Disposed between the expandable portions of the housing are expanding inserts trapezoidal in section, bearing by their larger bases against the tubular elastic vessel and by the sides, against the inner walls of the housing portions. For delivery of a working medium into the space of the elastic vessel provision is made for two pipe unions, each of which is installed for longitudinal movement in a holder having a flange disposed in a circular recess made on the inner surface of the housing. An electric element surrounding the elastic vessel is installed in the same circular recess. Each of the elastic vessel ends is disposed between the pipe union and the holder.