FR2517533A1 - ARRANGEMENT FOR KNOWING THE REGRANT PRESSURE IN THE SUCTION SLEEVE OF A DUST VACUUM CLEANER - Google Patents

Abstract

THE INVENTION RELATES TO AN ARRANGEMENT WHICH MAKES KNOWLEDGE THE PRESSURE IN THE SUCTION SLEEVE OF A DUST VACUUM. IN THIS LAYOUT, A PERIPHERAL ANNULAR CHAMBER 3 IS INTERCALED BETWEEN THE SLEEVE SLEEVE 1 AND THE VACUUM HOUSING 2, WHICH ALLOWS TO OBTAIN, WITHOUT USING ANY FLEXIBLE HOSE, A CONNECTION BETWEEN THE INTERNAL SPACE 9 DUDIT SLEEVE 1 AND A FILTER OBSTRUCTION INDICATOR DEVICE 12. APPLICATION TO VISUAL CONTROL DEVICES OF THE OPERATION OF DUST VACUUMS.

Description

The present invention relates to an arrangement allowing to know

  pressure, equipping devices

  indicators of filter clogging of vacuum cleaners

  in which the pressure in the suction sleeve is interrogated and said suction sleeve is

  rotatably mounted in the boot of the dust extractor.

  In arrangements of this type, it is usual

  to use a flexible hose that connects the place of interroga-

  pressure measurement at the filter obstruction indicating device When the suction sleeve whose pressure is interrogated is rotatably mounted, said flexible pipe must describe several loops around this sleeve and, in addition, it must have a free length enough not to

  twist on itself during the rotation of said suction sleeve

  ration in any direction.

  The disadvantage therefore lies in the fact that this flexible pipe is permanently subjected to rotational and bending stresses. Depending on the material of which it is manufactured, this results in a more or less rapid deterioration.

  In addition, care should be taken to ensure that

  This pipe does not have sharp abrasive edges or pointed corners, as they also deteriorate at the

long said pipe.

  It is therefore an object of the present invention to provide a pressure interrogation arrangement in which

  which the connection between the place of interrogation of the

  within the rotary suction sleeve, and the

  Positive indicator of filter clogging is established

without any hose.

  According to the essential characteristics of the invention

  tion, there is a peripheral annular chamber between the

  suction sleeve and the boot of the vacuum cleaner.

  According to other advantageous characteristics:

  peripheral sealing ring gaskets

  are placed on both sides of said peripheral annular chamber these fittings consist of joints called V; and said suction sleeve comprises, in said annular chamber, a hole ensuring the junction with the internal space of this sleeve, and said housing of the vacuum cleaner has a connecting channel allowing the connection to a

pressure capsule.

  In this way, the invention advantageously makes it possible to obtain an interrogation arrangement of the relegated pressure.

  remote from the device indicating the obstruction of the

  be, and in which no pipe is connected to the sleeve

rotary suction.

  The invention will now be described in greater detail.

  tail with reference to the accompanying drawings by way of non-limiting example, the single figure of which is a fragmentary section

  a vacuum cleaner box, the suction sleeve

  and the device indicating the obstruction of the filter

being also illustrated in section.

  A suction sleeve 1 is rotatably mounted in the

  boltier 2 of a vacuum cleaner Due to the configu-

  respective rations of the sleeve 1 and the casing 2, the latter delimit between them a peripheral annular chamber 3 which is hermetically sealed on its two sides 4 and 5 by peripheral annular sealings 6 and 7 These

  gaskets 6 and 7 are shaped into so-called V-shaped joints.

  interior of the annular chamber 3, it is provided in the sleeve

  a junction hole 8 which connects said chamber

  3 to an internal space 9 of said sleeve 1 A filter 12 is

  incorporated in this internal space 9 in front of said bored hole

  8, to ensure protection against penetration

dust.

  Inside the box 2 of the vacuum cleaner, is

  in addition, a connecting channel 10 connecting the annular chamber

  3 to a pressure capsule 11, so that the inter-

  derogation of the pressure in the internal space 9 of the

  sleeve 1 is provided, up to the capsule 11, through

  of the junction hole 8, the annular chamber 3 and the

junction channel 10.

  It follows from this arrangement that the sleeve 1 can furthermore perform a rotation of a multiple of 3600, which is only possible in a limited way when using a

a flexible pipe.

  It goes without saying that many modifications can

  to the arrangement described and shown, without

shot from the scope of the invention.

Claims (4)

  1 arrangement allowing to know the pressure,   equipped with indicators indicating the obstruction of the   be in dust exhausters, and in which the pres-   sion is interrogated in the suction sleeve and this is rotatably mounted in the casing of the vacuum cleaner, characterized in that a peripheral annular chamber   (3) is interposed between said suction sleeve (1) and the said stacker (2) of the vacuum cleaner.   2 arrangement according to claim 1, characterized   in that peripheral annular fittings of   (6, 7) are placed on both sides (4, 5) of the   peripheral annular chamber (3).   3 Arrangement according to claim 2, characterized in that the annular sealing gaskets (6, 7) are shaped into so-called V joints. 4 Arrangement according to claim 1, characterized in that the suction sleeve (1) has, in the annular chamber (3), a hole (8) ensuring the junction with the internal space (9) of said sleeve (1 ); and in that the casing (2) of the vacuum cleaner comprises a junction channel   (10) providing the connection of a pressure capsule (11).