Safety cabinet for filling self-contained breathing apparatus bottles

1. Safety cabinet for filling self-contained breathing apparatus bottles, for the extemporaneous filling of bottles containing compressed air for artificial breathing equipment for persons in water sports and professional activities, comprising:

a body in box shape having a front face and equipped with doors, allowing functional access to its interior;

a work bench housed inside the body;

a plurality of fixed horizontal shafts supported by the work bench and located in transverse direction with respect to the front face of the body;

a plurality of pairs of troncoconical rollers paired at their smaller bases and able to turn freely with respect to the plurality of fixed horizontal shafts thereby defining groups of parallel rollers suitable for receiving and sustaining the bottles to be filled;

a plurality of filling taps and a plurality of intake taps located inside the body; and

a plurality of feed chutes having one end joined to a common air collector and its opposite end joined to the filling taps, the common air collector connected to an outer installation generating compressed air, allowing compressed air to flow to the filling taps and to the intake taps.

2. The cabinet of claim 1 , wherein a group of the plurality of pairs of troncoconical rollers cannot move axially, and another group of the plurality of pairs of troncoconical rollers has adjustable axial position, allowing the settling of the bottles of different sizes in a filling position.

3. The cabinet of claim 1 , wherein:

a) the plurality of pairs of troncoconical rollers are mounted on the fixed horizontal shafts parallel and equidistant, the fixed horizontal shafts being supported on a common support in box shape having side faces and a partition between the side faces, and the partition being parallel to the faces;

b) a group of the plurality of troncoconical rollers cannot move axially but can turn freely on the fixed horizontal shafts located between one of the side faces and the partition;

c) a group of the plurality of troncoconical rollers having adjustable axial position is contained first inside a channel of rectangular section support having side faces and perforations, the fixed horizontal shafts passing through the perforations on the channel of rectangular section support; and

d) a space between the partition and one side face of the common support being of greater width than the distance between the partition and the other side face thereby allowing the channel of rectangular section support to move and the distances between the plurality of pairs of troncoconical rollers to be modified at will, according to a diameter of a bottle or diameters of twin bottles disposed horizontally over the common support.

4. The cabinet of claim 1 , wherein the body in box shape has an upper base and lateral side; a front sliding door on its front side and an upper sliding door on its upper base, the front sliding door equipped with an operating mechanism for its ascending and descending vertical movement comprising:

a central electric motor;

a spindle having a cog wheel on one end;

an axle-shaft, extended on its two ends, each end having a cog wheel; and

nuts attached to a support fixed on the front sliding door, the cog wheel of the spindle forming a conical gear assembly with the cog wheel of the axle shaft.

5. The cabinet of claim 4 , wherein the upper door is equipped with two handles for its manual operation and sliding up rollers and respective lateral guides on the upper base of the body.

6. The cabinet of claim 5 , wherein a control panel located mainly on the outside of the body comprises an emergency switch, a filling indicator gauge, an air compressor filling switch, a stop switch, and switches for the vertical movement of the front door and the upper door simultaneously.

7. The cabinet of claim 4 , wherein the front door has an upper edge, the upper edge having a transversal roller for the purpose of initial support for the bottles in their insertion into the work bench.

8. The cabinet of claim 7 , wherein the body has an inner part, a lower part and a rear part, each part having a chamber with escape openings for a shock wave that may occasionally result from an internal explosion or breakage of one or more bottles with highly compressed air.

9. The cabinet of claim 8 , wherein a device for operation of the upper sliding door simultaneous with that of the front sliding door comprises a mechanism of a nut, a lead screw and an electric motor.