Push Pull Cable
Push pull cables and controls are often used as remote-access latch release cables and as safety break cables. Push pull cables are designed for positive, precise transmission of mechanical motion. The conduit and core selection, the number of bends in the system, and the relative friction between the core and the conduit determine the efficiency of the control.
There are two main types of push pull cable assemblies: push-pull assemblies and pull-pull assemblies. In the push-pull assembly, motion is applied in one direction by compression and in the opposite directions by tension. In pull-pull assemblies, on the other hand, motion is applied by tension and the control is returned to its original position by spring actuation. Push pull cables consist of four basic elements, including the conduit, conduit fitting, core, and core fitting. Lined or Bowden conduits are used in industrial applications due to their tight winding and crush resistance.
Push pull cable applications are found in automotive seat releases, lawn mower throttle controls, and airplane seat back controls. Some uses of controls are obvious and visible, while others are not. All push-pull controls have a larger capacity in the tension (pull) mode than in the compression (push) mode.