Patent ID: 11859747
Assignee: TATSUNO CORPORATION
Field: Mechanical elements (Mechanical engineering)
Classification: CPC F | IPC F

Claim 3:
4. A safety joint comprising:
a plug body having a flow passage with a small inner diameter that is open at one end and a flow passage with a large inner diameter that communicates with the flow passage with the small inner diameter via a tapered valve seat;
a valve body having a small-diameter portion and a large-diameter portion continuous with the small-diameter portion via a tapered portion;
an elastic body that presses the valve body in a direction of the two flow passages in the plug body;
a first sealing means formed by the tapered portion of the valve body coming into contact with the valve seat of the plug body;
a recess formed in an inner wall of the flow passage with a small inner diameter of the plug body;
a second sealing means accommodated in the recess; and
a shutter sliding on the inner wall of the flow passage with a small inner diameter of the plug body to open or block the recess.