the male part having lugs on its periphery penetrating into the corresponding slots provided in the female part

Full Title

Couplings of the quick-acting type ( radially-binding sleeves F16L17/04, F16L21/06; connecting hoses to rigid members F16L33/00) > in which the connection is made by inserting one member axially into the other and rotating it to a limited extent, e.g. with bayonet-action > the coupling being co-axial with the pipe > the male part having lugs on its periphery penetrating into the corresponding slots provided in the female part