Spheroid pig launcher

摘要: An improvement in a launcher for launching spheroid pigs one at time into pipeline, having downward sloping barrel magazine holding multiplicity of and closable fluid tight opening loading the on breech end full bore valve muzzle communication with is characterized by apparatus situated upstream releasing pipeline from magazine. The comprises: (a) shaft means passing sealably through wall magazine, (b) exterior affixed to turning radially along its long axis, (c) interior catcher-releaser convexoid surface adjacent concavoid opposite surface, being truncated parallel axis shaft, such that rotation 365° will catch release single pig.