Abstract: The driving coupling member and the driven coupling member of a flexible coupling are tied together by a plurality of flexible torque-transmitting members which are arranged in a circular pattern. Each torque-transmitting member consists of an endless, substantially elliptical loop of an elastic material, e.g. rubber, which may be re-inforced by an appropriate woven material. Resilient inserts are placed into the elliptical cavities defined by the torque-transmitting members, and these inserts are compressed when the torque-transmitting members are elongated as a result of the transmission of torques between both coupling members. The aforementioned resilient inserts expand when the amount of torque transmitted is reduced. The expansion and contraction of the aforementioned inserts are transmitted to containers of a fluid medium and cause said fluid medium to flow out of a contracting container into another container. The flow of fluid is controlled by a restricted orifice.

Abstract: A flexible torque-transmitting element for tying the driven member of a flexible coupling to the driving member thereof includes a body of flexible material (such as rubber, or another elastomer) that has a rim zone. A fabric insert in said body of flexible material projects radially outwardly beyond said rim zone of said body of flexible material and forms a clamping zone situated outside said body of flexible material. Such a torque-transmitting element may be associated with annular clamping means that apply clamping pressure only against the portion of the fabric insert situated outside the body of flexible material.