摘要:
Pivotable leaf of the concealed type provided with engaging and disengaging means which intervene when the said leaf is brought beyond a certain tilted position after which it is substantially concealed. These engaging and disengaging means consist of telescopic pins (30) having a length which is variable with the aid of resilient means (38) engaged in right-angled guides (10, 10a) provided with ramp-shaped reliefs (22, 22a) which cause the telescopic pins (30) to retract.