Comprising pigs, i.e. movable elements sealingly received in supply pipes, for separating

Official title: {comprising pigs, i.e. movable elements sealingly received in supply pipes, for separating different fluids, e.g. liquid coating materials from solvent or air (cleaning pipes with pigs B08B9/0557, pigs per se F16L55/26)}

B05B12/1481 (Comprising pigs, i.e. movable elements sealingly received in supply pipes, for separating) appears on 65 US grants and 82 published applications in this corpus.