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

Claim 0:
1. 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 hollow-shaped cover having a plurality of projections on an outer peripheral portion thereof, the cover being disposed in the flow passage with the large inner diameter of the plug body so as to surround the valve 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 second sealing means provided in the small-diameter portion of the valve body and abutting against an inner wall of the flow passage with the small inner diameter of the plug body,
wherein when the tapered portion of the valve body is not seated on the valve seat of the plug body, the cover surrounds at least a portion of a region from the second sealing means to the large-diameter portion side of the valve body, and a flow passage is formed by the adjacent projections and the outer peripheral portion of the cover, and an inner peripheral surface of the passage with the large inner diameter of the plug body.