Legris Sa

Pierre Serot

Daniel Belisaire

The device for connecting a length of duct to a coupling endpiece of an apparatus or a member includes at least one tubular sleeve having two portions in axial succession, the first portion being internally fitted with components of an instant connection coupling for the end of a length of duct, the second portion including means for sealably and releasably covering the coupling endpiece, the end face of the endpiece forming an axial abutment at the end of the length engaged in the first portion of the sleeve.

Device for connecting a length of duct to a coupling endpiece

A controlled valve comprising a substantially hollow and elongate body fitted at its longitudinal ends with means for coupling to a pipe that is to be closed, the body including a transverse partition with a central channel formed therethrough, and also including a closure element that is movable parallel to the fluid flow between a closed position in which a zone of said element is in contact with a stationary bearing surface formed on the transverse partition and an open position in which said zone is at a distance from said bearing surface, in which the closure element is in the form of a piston having two end heads slidably mounted in two respective chambers that are coaxial with the channel and that are situated inside the body on opposite sides of the transverse partition, and the sum of the projections in a transverse plane of the surface areas of the element exposed to the pressure that exists in the pipe upstream from the zone of contact between the closure element and the bearing surface and that face downstream is equal to the sum of the same projections of the surface areas that are similarly exposed to said pressure and that face upstream.

Controlled valve

A network for distributing a fluid under pressure. The network has a substantially horizontal main pipe situated at an upper level, with horizontal or vertical secondary pipes branching therefrom. The junction between the main pipe and a secondary pipe is provided by a branch clamp having a zone for covering at least one orifice formed in the top half-cylinder of the wall of the main pipe, into which zone there opens out a first end of a branch duct internal to the clamp, the other end of the duct being fitted with a coupling for coupling the clamp to the secondary pipe. The axis of the first end of the branch duct and the axis of the coupling form an angle a which is obtuse when measured between the axes in the flow direction of fluid flowing along the branch duct.

Network for distribution fluid under pressure, a branch clamp for use in

An automatic coupler for pressurized fluid circuits is divulged of the type comprising a valve (19) sliding in a body (1), and means for balancing the upstream fluid pressure on the valve. The downstream portion of the latter forms a socket for receiving and sealingly locking a connector (8). The coupler comprises a means for locking the valve in two positions: one in which the valve is open and the other in which it is closed and the socket communicates with the atmosphere, the connector (8) being still locked. Release of the valve from the first position engages a locking means in an intermediate position whose release causes locking in the second position. The coupler of the invention reliably prevents the 'whiplash' phenomenon produced, at the time of uncoupling, by the downstream pressure.

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Fontenay-aux-Roses, France

Pierre Serot