Abstract

A joint fitting between a fluid pipe and an annular support, comprising a domed plate forming a ball (2) secured around the pipe (1), the ball (2) furthermore being in contact with an annular sheath (3) contained in a casing (4) of the annular support. The ball (2) comprises an inner plate (2a) and an outer plate (2b), the inner plate (2a) being welded via one of the ends of same to the pipe (1), the other end simply bearing on the pipe (1) with or without peripheral clearance, the outer plate (2b) partially covering the inner plate (2a).

IPC Classes  ?

• F16L 5/02 - Sealing

Abstract

Swivel joint, in particular for gaseous fluid piping, comprising a flexible metal bellows (5) mounted between two end pieces (2, 3) and a jacket (4) surrounding the bellows (5) and also fixed to the two end pieces (2, 3), the jacket (4) comprising a semi-spherical internal metal element (4a) and a fluid-tight semi-spherical external metal element (4b) in rubbing contact with the internal element (4a). The external element (4b) is covered over almost all of its internal and external surfaces with a layer of coating (4c) made up of a plurality of stacked individual thin layers of which there are between 1000 and 10 000, of a thickness of between 0.5 nm and 5 nm and based on one or more materials selected from chromium nitride (CrN), boron carbide (B4C), graphite, tungsten carbide (WC) and titanium aluminium nitride (TiAlN).

IPC Classes  ?

• F16L 27/073 - Universal joints, i.e. with mechanical connection allowing angular movement or adjustment of the axes of the parts in any direction with partly-spherical engaging surfaces with special sealing means between the engaging surfaces one of the cooperating surfaces forming the sealing means

Abstract

The invention relates to a seal (1) particularly intended for connecting together two fluid or gas flow ducts, including: a female end tip (4) having a first end (5), a male end tip (2) having a second end (3), the male end tip (2) being received into the female end tip (4). The seal (1) includes a sliding member (6) located between the first end (5) of the female end tip (4) and the second end (3) of the male end tip (2), said sliding member (6) including a stack of at least two layers of an inter-metal material that prevents any spread of a crack from one layer to the next one.

IPC Classes  ?

• F01N 13/18 - Construction facilitating manufacture, assembly or disassembly
• F16C 33/12 - Structural compositionUse of special materials or surface treatments, e.g. for rust-proofing
• F16L 27/06 - Universal joints, i.e. with mechanical connection allowing angular movement or adjustment of the axes of the parts in any direction with partly-spherical engaging surfaces with special sealing means between the engaging surfaces