US Patent 8491020 Tongue latch with protection

A tongue latch with a protection comprising a metal part folded to form a first longitudinal extension and a second longitudinal extension, the longitudinal extension terminates with a circular form having a squared hole, wherein the second extension has a lowered edge with special cuttings to lock the protection is provided. The protection comprises a hollow part made from a plastic material with low coefficient of friction and a mouthpiece with thin walls to better adjust to the dimensions of the tongue.