Patent ID: 7503592

Claim:
A quick coupling male portion for making a temporary junction between a hose (T) for conveying a cooling liquid to or from a duct (C) formed in a mold (M) that is to have the cooling liquid pass therethrough, the male portion comprising: a male plug for inserting in a female portion of the quick coupling, said male plug being pierced by a passage for the cooling liquid; moving balls for locking said male plug in said female portion; and a locking ring for driving said locking balls, said locking ring being movable relative to said male plug between a first position in which said locking balls can be retracted radially inside said locking ring and a second position axially offset from the first position in an insertion direction (F 1 ) for inserting said male plug into said female portion in which said locking balls are constrained to project laterally from said locking ring, wherein said male plug carries a visual indicator that is at least partially uncovered when said locking ring is in the second position and that is masked by said locking ring when said locking ring is in the first position, said visual indicator being an indicator ring that is engaged on said male plug and that is of an appearance that is different from that of said male plug, and wherein said male plug includes an abutment for said indicator ring and a spring for urging said locking ring toward the second position while urging said indicator ring against said abutment.