Fluidic connection device and non-return insert valve for vehicles

A non-return insert valve for a fluid circuit, said valve being configured to be inserted into a pipe and comprising:

• a tubular body having a main axis and comprising an external cylindrical surface configured to be surrounded by an internal cylindrical surface of the pipe, said body comprising an internal annular rim and an internal annular seat,
• a ring mounted at least partly in or on said body and comprising guides extending in a radial direction with respect to said main axis,
• a piston mounted in said body and comprising a head carrying a first annular seal configured to come to be supported on said seat, the piston comprising a first side and tabs extending axially from said first side and configured to slidingly cooperate with said guides, the piston further comprising a second opposite side and fingers extending axially from said second opposite side and configured to slidably cooperate with an internal periphery of said rim, and
• an elastically deformable member mounted between the head and the ring and configured to bias said first annular seal in axial support against said seat,
• said piston being axially movable from a first closed position of the valve in which said first annular seal is in axial support on said seat, to a second open position of the valve in which said first annular seal is at an axial distance from said seat, said displacement being intended to be caused by a fluid which is intended to apply a force on said second opposite side which is greater than an elastic return force imposed by said elastically deformable member,
• said head comprising at its external periphery, lugs which extend in a radial direction with respect to said main axis and which are configured to be supported axially against an internal cylindrical shoulder of said body, when the piston is in said first closed position, in order to precisely define said first closed position, the fluid being intended to flow between said lugs when the piston is in said second open position,
• wherein said fingers are located at an external periphery of said second opposite side and are connected to edges projecting from said second opposite side, said edges extending radially with respect to the main axis from the fingers and meeting at a level of said main axis.

A non-return insert valve for a fluid circuit, said valve being configured to be inserted into a pipe and comprising:

• a tubular body having a main axis and comprising an external cylindrical surface configured to be surrounded by an internal cylindrical surface of the pipe, said body comprising an internal annular rim and an internal annular seat,
• a ring mounted at least partly in or on said body and comprising guides extending in a radial direction with respect to said main axis,
• a piston mounted in said body and comprising a head carrying a first annular seal configured to come to be supported on said seat, the piston comprising a first side and tabs extending axially from said first side and configured to slidingly cooperate with said guides, the piston further comprising a second opposite side and fingers extending axially from said second opposite side and configured to slidably cooperate with an internal periphery of said rim, and
• an elastically deformable member mounted between the head and the ring and configured to bias said first annular seal in axial support against said seat,
• said piston being axially movable from a first closed position of the valve in which said first annular seal is in axial support on said seat, to a second open position of the valve in which said first annular seal is at an axial distance from said seat, said displacement being intended to be caused by a fluid which is intended to apply a force on said second opposite side which is greater than an elastic return force imposed by said elastically deformable member,
• said head comprising at its external periphery, lugs which extend in a radial direction with respect to said main axis and which are configured to be supported axially against an internal cylindrical shoulder of said body, when the piston is in said first closed position, in order to precisely define said first closed position, the fluid being intended to flow between said lugs when the piston is in said second open position,
• wherein said tabs are connected to a base projecting from said first side, said base being configured to be supported axially against said guides, when the piston is in said second open position, in order to precisely define said second open position.