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AssigneeFujikin Incorporated
InventorsKoji Hiramatsu, Michio Yamaji, Kunihiko Daido, Tadayuki Yakushijin, Yasumasa Yanagida, Takashi Funakoshi
Estimating the term…
Provided are a seal structure in which sealing performance is ensured over a long period of time even when it is used for low-temperature fluids, a sealing method, and a coupling including the seal structure. The seal structure includes an annular gasket interposed between a first member and a second member. The first member is provided on its surface facing the gasket with: an annular protrusion; an inclined surface located on an inner diameter side with respect to the annular protrusion and inclined in a direction away from the gasket; and an outer-diameter-side surface located on an outer diameter side with respect to the protrusion.
A seal structure provided at a butt portion of a first member and a second member respectively having fluid passages that are in communication with each other, the seal structure constituted by part of the first member and the second member,
A sealing method at a time of fastening a screw to connect a first member and a second member respectively having fluid passages that are in communication with each other, the sealing method comprising the steps of, interposing an annular gasket between the first member and the second member, and providing at least one of the first member and the second member on its surface facing the gasket with:
Dependencies are inferred from the claim text.