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US 2013/0154253 A1Published application
Fluid coupling
AssigneeFujikin Incorporated
InventorsKoichi Yuhara, Izuru Shikata
Life of this patent
Estimating the term…
Abstract
A fluid coupling capable of reliably finding absence of the gasket, if exists, in the leak test is provided. Butted end surfaces of coupling members 1, 2 have annular sealing protrusions 7, 8 and anti-overfastening annular protrusions 9, 10 protruded further than the annular sealing protrusions 7, 8, respectively. At least one of the anti-overfastening annular protrusions 9, 10 has a communication path 31 or 32 communicating internal space Si with external space So when both the anti-overfastening annular protrusions 9, 10 butt against each other.
Claims3
A fluid coupling comprising:
- first and second coupling members including respective fluid paths communicating with each other;
- an annular gasket interposed between butted end surfaces of both the coupling members;
- and
- a screw means that couples the coupling members to each other, the butted end surface of each coupling member having an annular sealing protrusion and an anti-overfastening annular protrusion protruded further than the sealing protrusion, wherein
- at least one of the anti-overfastening annular protrusions has a communication path that communicates an internal space with an external space when both the anti-overfastening annular protrusions butt against each other.
2 more elements
Dependencies are inferred from the claim text.