Patent ID: 11879559
Assignee: nan
Field: Other special machines (Mechanical engineering)
Classification: CPC F  B | IPC B  F

Claim 0:
1. A vent valve (10) for vent holes of vulcanization molds, consisting of:
a sleeve (1), through which passes an inner cylindrical hollow (1.1), said sleeve includes a valve conical hole (1.2) at a first end and a cylindrical hole (1.4) at a second end;
a pin (2) movably fitted with a spring (3) in the inner cylindrical hollow (1.1), the pin (2) contains a lower cylindrical part (2.4), a central cylindrical part (2.5) and a connecting cylindrical part (2.6);
wherein said lower cylindrical part includes a lower conical part (2.4.1) and an upper conical part (2.4.2) which is coupled to the central cylindrical part (2.5);
wherein the lower cylindrical part (2.4) and the central cylindrical part (2.5) are divided into four flexible legs (2.7 to 2.10) identically shaped, forming a flexible collet;
wherein diameter of the central cylindrical part (2.5) is smaller than diameter of the connecting cylindrical part (2.6) as well as diameter of the lower cylindrical part (2.4); and
wherein the four flexible legs (2.7 to 2.10) partially reach into the connecting cylindrical part (2.6).