Abstract: A vacuum-generating dynamic transmission system includes a first pulley fixed for rotation about a first axle and a second pulley fixed for rotation about a second axle. A chain rotates around the axles and the pulleys. The chain has a plurality of links, one or more of the links having a vacuum-generating device that pressurizes the chain to at least one of the pulleys. The vacuum generating device includes a movable inductor protruding from a central channel on a first side of the link, and a movable abductor within the channel and proximate a second side of the link. The first side of the link contacts a conical semipulley of the first pulley and the second side contacts a cylindrical semipulley of the first pulley, opposite the conical semipulley, as the chain rotates through the pulley. a conduit provides pneumatic communication from the central channel to the outside environment.