FR2874047A1 - Device for protecting people in a liquid medium containing an immersed jet of liquid, using a stainless steel dome pierced by a central hole and several lateral holes to reduce the "suction effect" - Google Patents

Abstract

The surface is spherical to prevent cuts to human skin. The holes allow the fluid to exit in two ways: the central hole allows the passage of fluid ejected by a propulsive force from a nozzle and the side holes allow passage of the fluid if the central hole is closed. The area of the central hole is less than or equal to the sum of the areas of the side holes, thus the "suction effect" is not produced : A space remains free between the nozzle from which the liquid jet comes and the distal end of the dome. This internal space allows liquid to flow to the side holes if the central hole is closed. The device is designed to prevent direct contact between the human body simultaneously with the wall of the swimming pool or oil rig and the fluid jet nozzle. The central hole is larger than the fluid jet. The dome is pierced at the side with holes which are smaller than the fingers and toes of children. The device is held against the wall by screws or bolts.

Description

Device for preventing the suction effect in front of a jet of fluid in the

  public or private pools and Jacuzzis and oil drilling.

  The present invention relates to a device for preventing the suction effect; the suction effect of a being or an object against the nozzle of a jet of fluid in a liquid medium.

  The purpose of this device is to prevent the human body or smooth object from being sucked up against the nozzle from which a jet of fluid flows, to avoid serious internal tears. The device according to the invention overcomes this disadvantage.

  It has in fact a first feature, a concave cupola having a free internal space and a hole, central hole, through which the fluid exiting the nozzle of the pipe, can exit freely to spring into the air or the liquid medium.

  The second characteristic of this cupola is that it has lateral holes so that the fluid can come out of the dome if the central hole of the dome is closed.

  The third characteristic is that this dome must be indestructible and securely attached, either inside or outside the dome, to the wall.

  The fourth characteristic of this dome is that the human body or the smooth object can no longer be in direct contact with the nozzle of the fluid jet pipe.

  This fourth feature avoids the suction effect because the human body or the smooth object will not stick against the wall and may move away from the nozzle.

  The accompanying drawings illustrate the invention.

  Figure.1, here drawn top view, corresponds to Figure.1, side view of the original application n: 04 08540, filed 03/08/2004. It represents the same dome, with a central hole, fixing screws, and a multitude of small holes.

  By way of non-limiting example, FIG. 1 represents the device of the invention with a dome-shaped top view, namely the hemispherical and concave or cupola part (5), the part for fixing (10). , the screws (8), and the central hole (4), with the nozzle (2) below.

  Figure.2, drawn side view, represents the wall of a pool (1) with the nozzle (2) of the pipe (9) where the water jet (3) gushes to the central hole (4) of the dome (5). The nozzle (2) is at the center of the dome (5) on its distal end.There are lateral holes (6) The dome (5) is securely fixed to the wall d) by screws (8).

  By way of non-limiting example, the dome (5) will have dimensions of the order of 20 centimeters in diameter, of which 17 centimeters for the concave internal part, and 6 centimeters in height. The diameter of the central hole (4) is 26 millimeters. The side holes (6) have a cumulative surface area greater than that of the central hole (4).

  Figure.3, here drawn side view, corresponds to Figure.2, drawn side view, of the original patent application No. 04 08540 filed 03/08/2004. It represents the same nozzle, with its water inlet pipe, in the pool floor.

  Figure.3 shows the nozzle (2) (20 millimeters in diameter) of the water inlet pipe (9) in the pool wall (1).

  FIG. 4 shows the phenomenon of suction effect on child's buttocks (16), with the nozzle (2), from which the water jet (3) comes out with a pressure of 1.7 kg / cm 2, The jet is stopped in the natural cavity (14), its speed is then 0, the pressure is the same. The speed of the water laterally to the body (15) attracts against the wall of the pool (18) the buttocks, in a submerged environment of water (17).

Claims (5)

  1) Device for protecting people in a liquid medium having a submerged fluid jet, characterized in that it is in the form of a dome, made of stainless metal, perforated with a central hole and lateral holes.   Its surface is spherical to avoid cuts on the human body The holes allow the fluid to exit in two ways; the central hole allows the passage of the fluid ejected by the propulsion force, the nozzle, and the lateral holes allow the passage of the fluid if the central hole is closed.   The area of the central hole is equal to or smaller than the sum of the area of the side holes; thus the suction effect can not occur.   2) A space must remain free between the nozzle from where the jet of fluid and the distal end of the dome. This internal space allows fluid flow, if the central hole is closed, to the side holes.   3) Device according to claim 2) characterized in that it is arranged to prevent direct contact between the human body simultaneously with the wall of the pool or oil drilling, and the nozzle of the jet hose of fluid.   4) The device according to claim 3) is characterized by a central hole on the outer surface of a larger dimension than that of the fluid jet. The cupola is perforated laterally by holes of a size smaller than that of the fingers and toes of a child.   5) The device is held against the wall by screws or bolts.