Pigs or moles, i.e. devices movable in a pipe or conduit with or without self-contained propulsion means

Devices or appurtenances for use in, or in connection with, pipes or pipe systems > Pigs or moles, i.e. devices movable in a pipe or conduit with or without self-contained propulsion means

Devices or appurtenances for use in, or in connection with, pipes or pipe systems (F16L1/00 - F16L53/00, F16L57/00, F16L59/00 take precedence; repairing or joining pipes on or under water F16L1/26; cleaning of pipes B08B9/02, e.g. removal of blockages B08B9/027; devices for preventing bursting of water pipes by freezing E03B7/10) > Pigs or moles, i.e. devices movable in a pipe or conduit with or without self-contained propulsion means