Patent ID: 8827318
Filing Date: 2014-09-09
Classification: F16L,F25B

Abstract:
1. A fluid passage connecting device comprising: a first component defining a first passage; a second component defining a second passage, the second component being connected with the first component in a manner that the first passage and the second passage communicate with each other through a communication part; a seal component disposed between the first component and the second component to provide a sealing between the first passage and the second passage; and a ring component arranged to surround the communication part, the ring component being located adjacent to the communication part rather than the seal component, wherein the ring component restricts the communication part from having an excess increase in a cross-sectional area, the ring component has an inner surface which connects an inner surface of the first passage and an inner surface of the second passage with each other, the ring component has a first projection-shaped cone surface on a first end of the ring component in an axis direction, and a second projection-shaped cone surface on a second end of the ring component in the axis direction, the first component has a first recess-shaped cone surface having the same axis with the first passage, and the first projection-shaped cone surface of the ring component and the first recess-shaped cone surface contact each other through a first slant-contact face, the second component has a second recess-shaped cone surface having the same axis with the second passage, and the second projection-shaped cone surface of the ring component and the second recess-shaped cone surface contact with each other through a second slant-contact face, the ring component is made of a material that is elastically deformable inward in a radial direction by being interposed between the first component and the second component in the axis direction, the ring component has a C-shape having a discontinuity defined by a clearance, and the clearance has a circumference dimension that is varied in accordance with a deformation of the ring component in the radial direction.