Patent ID: 11906080
Assignee: NIPPON PILLAR PACKING CO., LTD.
Field: Mechanical elements (Mechanical engineering)
Classification: CPC F | IPC F

Claim 0:
1. A fluid device including a passage which is to be sealed by insertion of an annular gasket, the device comprising:
a flow port open to form one end of the passage; and
an annular groove arranged along an outer circumferential edge of the flow port, the annular groove being open so as to insert the gasket therein,
wherein:
the annular groove has a radially-inner side interior wall and a radially-outer side interior wall,
the radially-inner side interior wall having includes:
a first tapered portion which includes an open end of the annular groove and which slopes radially outward from the open end of the annular groove in a depth direction, and
a first portion that is continuous with the first tapered portion in the depth direction, extends to a bottom portion of the annular groove in the depth direction, and has a larger diameter than the first tapered portion,

the radially-outer side interior wall includes:
a guide extending throughout a predetermined range from the open end of the annular groove and having a diameter that is larger than a diameter of an outer circumferential surface of the gasket, and
a second portion that extends to the bottom portion in the depth direction and has a smaller diameter than the guide, and

a thickness of the gasket in a radial direction is larger than a width between the first portion and the second portion.