FR2584436A1 - FLOATING BELL HUNTING DEVICE FOR WATER HUNTING RESERVOIR. - Google Patents

Abstract

1. Flushing device with bell shaped float for toilet cisterns, comprising : - an external tubular casing (1) equipped with an inflated lower section or external bell-shaped section (1b) intended for use in a cistern (8-8a) : - a base (7) equipped with a central opening (0) which constitutes the drain outlet of the cistern and a mounting device (17) which attaches it to the base of the external bell-shaped section (1b) in such a manner as to allow it to move : this base is fixed rigidly over the lower opening (11) of the cistern ; - a moving unit (2-3-4) which is capable of transverse movement, housed inside the external casing, and comprising a valve (3) which closes the drain outlet, disposed at the lower end of an overflow pipe (2) which is open at both ends and the lower end of which is equipped with a bell-shaped float (4) disposed around the lower part of the said overflow pipe and housed in the external bell-shaped section (1b) of the rigid casing (1), an annular gap (a) being formed between the cylindrical lateral walls (4d, 1b'') of the said internal bell-shaped float (4) and the said external bell-shaped section (1b) ; while another annular gap (d) is formed between the upper section of the overflow pipe and the upper section (1a) of the said external casing : characterized in that the lower section of the bell-shaped flat (4) is equipped with a sealing collar (4b) the diameter of which is slightly smaller than the internal diameter of the cylindrical unit (16) of the fixed piece of the device in which it moves, so that a very slight gap, which is necessary to allow the axial movement of the bell-shaped float, is formed between the edge of the sealing collar and the internal wall of the cylindrical unit.

Description

- 1 - Floating bell hunting device, for storage tank

flush.

  The present invention relates to a floating bell flushing device for a toilet flush tank and, more specifically, to a device of the type described in document FR-A-1 517 475 and comprising a flap for apply on the edge of the drain hole in the bottom of the tank and secured, in

  axial translation, of a floating bell arranged

  above said valve and to keep it away from its seat formed by said edge, during the emptying process. This floating bell is arranged around the lower part of a tubular rod, whose end is equipped with the valve, this rod being open at its ends.

  opposed, so as to constitute a tube of overflow per-

  putting the evacuation of a possible overflow which could, for example, result from the faulty closure of the valve controlling the admission of water into the tank. In addition, this floating bell or inner bell is housed, concentrically and with an axial movement aptitude, in a larger diameter outer bell constituted by the lower part of an outer casing intended to

  to be installed firmly in the tank, the upper entrance

  of the outer bell being closed off by the top of said inner movable bell, when this

  last is raised in the high position.

  In this way, when the mobile unit of the flushing device is raised and the water is evacuated through the tank draining orifice, the flow of water causes suction of the air at the base of the tank. overflow tube following a

  flow rate greater than the flow of penetrating air to the

  of the fixed outer casing of said device, this suction tending to create a depression or effect of

  empty in said upper part. This depression or ef-

  vacuum fet conjugate with the buoyancy effect of the floating bell, tends to maintain the mobile device

  in the high position, during the emptying of the tank.

  P-- Hunting devices of this kind still include a base provided with a central orifice whose upper edge is the seat of the valve; this cap being intended, of a

  on the other hand, to be installed firmly on an opening

  the bottom of the tank and, on the other hand, to allow the removable attachment of the lower part of the

  hunting itself with complete assembly means

  mentary. A disadvantage of such flushing devices, in particular when they are installed on cuvettes with a low flushing rate or on cuvettes with a medium flow rate, arises from the fact that a fallout of their moving equipment often occurs before the flush. completion of the emptying process and, therefore, premature application of the valve to its seat, so that the flushing action of

  said bowl is more or less insufficient.

  This flawless operation of the flushing mechanism results from the fact that when the inner bell is raised in the raised position, the air freely enters between said inner movable bell and the fixed outer bell, as soon as the level of the water is discharged from the reservoir. has lowered to below the base of said outer bell, this air inlet causing the flow of the amount of water previously maintained between the two concentric bells and allows a flow of air towards the upper part of the outer casing. As the buoyancy of the inner bell becomes insufficient and the vacuum effect is removed in the upper part of the outer shell, the moving element of the flushing mechanism falls back under the effect of its own weight, before

  the water has not been completely removed from the tank.

  An object of the present invention is therefore to eliminate the above operating imperfection of

  flushing devices of the kind referred to above.

  According to the invention, this object is achieved by means of a flush device of this kind, characterized in that the floating bell of its mobile assembly is provided in its lower part with a flange collar - 3 - whose diameter is barely less than the internal diameter of the cylindrical member of the fixed part of said device in which it is called to move; a very weak clearance only, necessary for the axial movement of said floating bell, being formed between the periphery of said collar

  shutter and the inner wall of said cylindrical member.

  With this construction, when the mobile device of the device is in the up position and when the level of the water draining from the tank has dropped to below the plane in which the base of the bell is located.

  floating of said moving equipment, the shutter collar -

  constitutes an obstacle limiting the flow of air.

  between said floating bell and the outer bell

  fixture, which has the effect of delaying the flow of water between the two bells and the fallout of the moving equipment for a time sufficient to allow the total emptying of the tank or tank and, consequently, a optimum rinsing of the bowl, whatever

its flow rate.

  The above goals, features and benefits,

  and still others will come out better from the description that

  following and attached drawings in which: Figure 1 is an axial sectional view of an example

  execution of the flushing device according to the invention, -

  installed inside a tank or toilet tank and shown in the closed position of

  the emptying orifice of said tank.

  FIG. 2 is a partial view, in axial section and on a larger scale, of the lower part of this

hunting device.

  Figure 3 is a plan view and cross-sectional view

  along line 3 - 3 of Figure 2.

  FIG. 4 is a detail view, in longitudinal section,

  dinal, illustrating one of the guiding means of the bell

  floating inside, during its axial movements.

  Figure 5 is a plan view of Figure 4.

  Figures 6 and 7 are schematic views

  -4- tick, illustrating the operation of the hunting device

according to the invention.

  These drawings are referred to to describe an advantageous, though in no way limiting, embodiment of this device. According to this interesting embodiment, this device comprises, in a known manner, an outer tubular casing 1 comprising a cylindrical upper portion 1a and a lower recessed portion or outer bell 1b. The upper end of the upper portion 1a of this outer shell is provided with a cap lc provided with a

tapped axial orifice ld.

  In the outer casing 1 is housed, with an axial upward or downward movement ability, a tube

  "overflow" or overflow evacuation tube 2 to the ex-

  lower end of which is fixed the valve 3 shutter of the drain port of the tank. This valve is, for example, constituted by a seal in the form of a circular ring installed in a peripheral groove that has a frame 2a constituting the lower end.

of the overflow tube 2.

  The lower portion of said overflow tube is arranged to form a float. This float is formed by a bell 4 disposed around the lower portion of the overflow tube 2 and whose lower edge is placed above and at a reduced distance from the plane in which the upper face of the valve 3 is located, said bell being closed. to his

top and open at its base.

  The inner floating bell 4 is housed, concentric

  in the outer bell lb and an annul-

  re a is reserved between the cylindrical side walls of

  these two bells. When the inner bell 4 is raised

  raised in the upper position, it abuts, via its top 4a, against the bottom lb 'of the outer bell lb, in

  closing the upper opening b of the latter.

  The hunting device also comprises a control system comprising, for example, a push button 5,

- 5 -

  mobile axially and vertically. This push button is guided in the upper part of an axial recess 6a which is provided with a fixed setting button 6 having a tubular shaft 6b provided with an external thread on at least its lower portion. The tubular rod 6b is screwed into the nut formed by the cap lc forming the top of

the outer shell 1.

  On the other hand, such a device also comprises a base 7 having a central orifice 0 whose circular edge

  upper 7a forms the seat of the valve 3.

  The base 7 and the base of the outer bell 1b are provided with complementary joining means allowing them to be assembled removably, while allowing the

  passage of water between said base and said base.

  When the flushing device is installed in a tank itself fixed on a toilet bowl 19 partly shown in FIG. 1, it is immobilized inside said tank: on the one hand, by means of the button fixed setting 6 bearing on the upper face of the cover 8a (partially shown in Figures 1, 6 and 7) of the reservoir and whose stem 6b passes through an orifice 9 formed in said cover, and - on the other hand, by means of the base 7 fixedly installed, by means of a nut 10 screwing on its threaded lower cylindrical portion 7b, in the orifice 11 that has the bottom 8 of the tank (partially illustrated in Figures 1, 2, 6 and 7) so that the central orifice 0 of said base constitutes the emptying orifice of the reservoir. The seal between the bottom of the tank and the base is achieved by means of

a rubber seal 12.

  The base 7 carries a crosspiece 13 fixedly disposed through its central orifice 0, below the seat 7a of the valve 3. On this crosspiece 13, bears the lifting member of said valve, constituted by a cam 14 arranged

  beneath it and mounted with a pivotal aptitude

  at the lower end of a transmission rod

  likely to be pushed back by the push button 5.

  The advantage of this valve lifting mechanism, in its application to the flushing device according to the invention, is that there is no mechanical connection between the movable element 2-3-4 and the organ 14 lifting of it. In this way, when the floating bell 4 moves upward under the effect of its buoyancy, after lifting the valve, it self-positions against the bottom of the fixed outer bell lb, thereby closing the entrance perfectly.

higher b of the latter.

  The hunting device according to the invention is mainly

  is remarkable in that the inner floating bell 4 is provided, in its lower part, preferably at its base, a shutter collar 4b whose diameter D is only slightly smaller than the diameter d of the cylindrical member of the part fixed flush device in which said collar is called to move during axial movements of said inner bell. A very small clearance, necessary for the axial movement of the inner bell, is thus formed, in this position, between the periphery of the shutter collar 4b and the inner wall of said

cylindrical member.

  According to the advantageous embodiment illustrated, this

  cylindrical member is constituted by a sheath of

  12 formed integrally with the base 7 and rigidly attached thereto via spaced apart and equidistant locking forks 17 which is provided with said base, in a manner known per se, to allow its attachment to the base of the outer bell lb.

  In this case, the shutter 4b has a width sensi-

  the width of the annular space between the outer surface of the side wall 4d of the inner bell 4 and the inner surface of the sealing sleeve. This cylindrical sheath 16 is disposed above and away from the seat 7a of the valve and its outer diameter is

  substantially equal to the internal diameter of the lower part

  cylindrical re 1b "of the outer bell 1b in which said sleeve is engaged without significant play, when the cap - 7 -

  7 is assembled at the base of said outer bell.

  In order to allow guiding of the inner bell 4 when the flushing device is provided with a pushbutton control mechanism of the kind illustrated and previously described, or to prevent the rotation of said bell when said device is equipped with a pull-type control mechanism or push-button mechanism of another type, the assembly constituted by the locking forks 17 and the sleeve 16 secured to them, and the inner bell 4, are arranged in a complementary manner, way to allow the axial movements of the latter while

  prohibiting its rotation around its axis.

  This complementary arrangement comprises, for example, on the one hand, longitudinal ribs 18 that has the inner face of the assembly constituted by the locking forks 17 and the sleeve 16 and, on the other hand, notches 4c formed at the periphery of the obturator collar 4b and in which are engaged said ribs. The ribs 18 extend from the base of the locking forks 17 to the end or upper edge of the

sleeve 16.

  According to the illustrated embodiment (Figure 3), the base 7 has three vertical locking forks 17 whose centers are spaced 120 degrees. In this case, the assembly 16-17 comprises three longitudinal ribs 18 spaced 120 degrees, while the shutter collar 4a is provided with three notches 4b also distant 120

  degrees and in which are engaged said ribs.

  The operation of the device of the invention is described below.

hunting according to the invention.

  During filling or inactivity (Figure 1), the movable element 23-4 of the device is in the low position and the valve 3 rests on its seat 7a and closes the orifice

  0. The shutter collar 4b of the interior bell

  4 is disposed below and at a distance from the lower edge of the cylindrical sheath 16 and, taking into account that the water contained in the reservoir 8-8a can penetrate into the annular space a by passing between the lower portions 8 locking spigots 17 and freely circulate in this space, it also fills all of the space ac existing between said inner lug and the outer bell lb, and also the annular space provided between the overflow tube 2 and the cylindrical portion 1a of the outer fixed casing 1. The level of the water contained in the reservoir is generally a little below the location where the upper end of the vertical overflow tube is located and this one can fulfill its function in

  case of faulty closing of the supply tap.

  When operating the control mechanism of the

  hunting device, the valve 3 is detached from its seat 7a and the upward thrust exerted on the floating bell 4 ensures the ascent of the mobile unit until the top 4a of said bell comes to lean against the bottom lb 'of the outer bell lb, closing the upper opening b of the latter so that the annular passages a and d are no longer in communication (Figure 6). During the rise of the inner bell, a small amount of water remains, on the one hand, in at least the lower part of the annular space d and, on the other hand, in the annular space a. The water that escapes from the tank through the drain hole O, according to Flicks F has the effect of creating an air suction arrow F1 at the bottom of the overflow tube 2. The amount of air that is

  evacuated from the outer casing 1 by this suction effect.

  ration being greater than the amount of air entering the

  upper part of the envelope, it is created

  of the latter, a partial vacuum which conjugates with the ascending forces F2 to which the inner bell 4 is subjected.

  because of its buoyancy, contributes to maintaining

  high level of the mobile equipment 2-3-4 of the flushing device. During the evacuation process, the decrease in the height of the annular water column retained between the cylindrical walls 4d, 1b "of the inner bells 4 and outer bb, respectively, does not follow the drop in the level of the water contained in the tank, outside of - 9 -

  the outer casing 1, to which it should normally

  correspondingly by virtue of the principle of

  the fact that the presence of the sealing sheath 16 and the sealing collar 4b constitutes an obstacle hindering the flow of water trapped between

  said walls, in the direction of the emptying orifice 0.

  When the level of the water draining from the reservoir has lowered to below the base of the outer bell lb (Figure 7), the presence of the sleeve 16 and the neck 4b counteracts the penetration of air into the annular space a and, therefore, also delays the flow of water retained in this space. The tightness between the spaces a and d is thus maintained for an additional period during which the movable element 2-3-4 is held in the high position and this time is sufficient to allow complete emptying of the tank or tank. The entry of a certain amount of air into the space then puts an end to the seal between said space and the space causing the fallout of said moving assembly, the application of the valve 3 to its seat 7a and the closing of the orifice of

emptying 0.

- 10 -

Claims (10)

R E V E N D I C A T I 0 N S   1. - Floating bell hunting device, for flush tank of the type including in particular: - an outer tubular casing (1) having a bulged lower portion or outer bell (lb) and intended to be fixedly installed to the inside a tank (8-8a); a base (7) provided with a central opening (0) intended to constitute the discharge port of the tank and fastening means (17) allowing its removable assembly at the base of the outer bell (1b), this base being intended to be fixedly installed on the lower opening (11) of the tank; - a movable element (2-3-4) housed with an axial displacement ability, inside the outer casing, and comprising a valve (3) for closing the drain orifice, installed in the part lower part of a tube (2) discharging overflow or overtube tube open at its ends and whose lower portion is equipped with a float constituted by a bell (4) disposed around the bottom of said overflow tube and accommodated in the outer bell (1b) of the fixed casing (1), an annular space being provided between the cylindrical side walls (4d, 1b ") of said floating inner bell (4) and said outer bell (1b). ), while another annular space (d) is also reserved between the upper portion of the overflow tube and the upper portion (la) of said outer casing; characterized in that the floating bell (4) is provided, in its lower part, a shutter collar (4b) whose dia meter and barely less than the internal diameter of the cylindrical member (16) of the fixed part of the device in which it is called to move, so that only a very small clearance necessary for the axial movement of   said floating bell is located between the peripheral   said shutter collar and the inner wall of said cylindrical member. - 11 -   2. - flotation device Floating device according to claim 1, characterized in that the shutter collar   (4b) is disposed at the base of the floating bell (4).   3. - Floating bell hunting device, according to one   claims 1 or 2, characterized in that the organ   cylindrical in which the shutter collar (4b) moves during the axial movements of the floating bell (4) is   formed by a sealing sheath (16) rigidly   of the base (7) and disposed above and away from the seat (7a) of the valve (3), this sleeve having an outer diameter substantially equal to the inner diameter of the cylindrical lower portion (Ib ") of the outer edge ( 1b) in which said sleeve is engaged without appreciable play When said base is assembled at the base of said bell exterior.   4. - Floating bell hunting device according to claim 3, the base (7) is provided with spaced locking forks (17) for its removable assembly to the lower part of the outer bell (lb), characterized in that that the sealing sleeve (16) is rigidly attached to said base, via   said locking forks.   5. - Floating bell hunting device according to one of   any of claims 1 to 4, characterized in that   its moving element (2-3-4) is mounted with an axial freedom of movement inside the outer casing (lb). 6. - Floating bell hunting device according to one of   any of claims 3 to 5, characterized in that   the inner floating liner (4) and the   (16) are arranged in a complementary manner for   guiding said inner bell. - 12 -   7. - Floating bell hunting device according to one of   any of claims 3 to 6, characterized in that   the inner floating bell (4) and the water jacket   Chest (16) are arranged in complementary manner to prevent rotation of said inner bell. 8. - Floating bell hunting device according to one of the   claims 6 and 7, characterized in that the means   for guiding the inner bell (4) and / or preventing its rotation are formed, on the one hand, by longitudinal ribs (18) that the inner face of the assembly formed by the locking forks (17) and the sleeve (16) and, on the other hand, by notches (4c) formed at the periphery of the obturator collar (4b) and in   which are engaged said ribs.   9. - Floating bell device according to claim 8, characterized in that the ribs (18) extend from the   base of the locking forks (17) to the end upper half of the sleeve (16).   10. - Floating bell device according to one of   claims 8 or 9, characterized in that it comprises   three longitudinal ribs (18) associated with three   notches (4c) spaced 120 degrees apart.