Abstract: Installation for pumping a liquid coming from an underground source, comprising a well (10) extending from the surface (12) towards the liquid source (14), the well having a chamber (40) extending substantially over its entire length, at least one tubing (18) passing through the chamber and communicating with the latter, and a set of valves (34), which is intended for putting the chamber selectively in communication with a gas source at a first pressure (36), making it possible for the liquid coming from the source to fill the chamber, and a gas source at a second pressure (38) higher than the first pressure, in order to empty the chamber, the liquid being delivered towards a first outlet (30) by flow through the tubing, characterized in that the said installation comprises, furthermore, a shutter (52), mounted in the tubing (18), and a second conduit (58; 70) leading to a second outlet (74), the shutter being capable of reacting to the density of fluid surrounding it, so that it can deliver a first liquid to

Abstract: The closure device is suitable for use as a lateral door or a back door of a passenger vehicle. It comprises a closure member movable between a closure position on a frame and a fully open position. The linkage connecting the closure member to a body provided with the frame has first arms and second arms. The first arms are pivotally mounted on the body for rotation about a horizontal axis and are pivotally mounted at their other end on a closure member about another axis parallel to the first axis. The second arms each have an end mounted on the body for pivotal movement about a horizontal axis parallel to the other axis and another end pivotally mounted on the closure member for rotation about an axis parallel to the other axis. The second arms are telescopic and have a retracted condition in which they have a first length and an expanded condition in which they have a second length greater than the first length.

Abstract: The device comprises a head 1 containing a cavity 2 and a sleeve 4, and a hollow body 3, inside which is lockingly housed a hollow mandril 6 fixed to a load to be carried and comprising a valving piston 17. Inside sleeve 4 is housed a mobile piston 31 whose head 32 slides in cavity 2. Pipes 27, 28, 29 pass through the cavity 2, whereas, opposite these pipes, housings 320 are formed in the piston 31 for allowing the piston to slide along the pipes. These housings are extended by ducts 33, 34, 35 opening laterally into the face of the piston 31 through orifices 36, 37. Inside mandril 6 are provided longitudinal high pressure fluid ducts 39, 40 for connection to the user circuits. The lateral face of the valving piston 17 comprises annular seals 44, 45, 46 intended to close off, in the raised position of piston 31, the annular zones corresponding to the orifices through which ducts 39, 40 open out and which communicate in the low position of 31 with the orifices 36, 37.