EP0072746B1 - Hand held spraygun for dispersing a plant treatment liquid - Google Patents

Hand held spraygun for dispersing a plant treatment liquid Download PDF

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Publication number
EP0072746B1
EP0072746B1 EP82401507A EP82401507A EP0072746B1 EP 0072746 B1 EP0072746 B1 EP 0072746B1 EP 82401507 A EP82401507 A EP 82401507A EP 82401507 A EP82401507 A EP 82401507A EP 0072746 B1 EP0072746 B1 EP 0072746B1
Authority
EP
European Patent Office
Prior art keywords
filter
hand
trigger
handle
spray gun
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
EP82401507A
Other languages
German (de)
French (fr)
Other versions
EP0072746A3 (en
EP0072746A2 (en
Inventor
Patrick Jean-Marie Ballu
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Tecnoma SA
Original Assignee
Tecnoma SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Tecnoma SA filed Critical Tecnoma SA
Publication of EP0072746A2 publication Critical patent/EP0072746A2/en
Publication of EP0072746A3 publication Critical patent/EP0072746A3/en
Application granted granted Critical
Publication of EP0072746B1 publication Critical patent/EP0072746B1/en
Expired legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B15/00—Details of spraying plant or spraying apparatus not otherwise provided for; Accessories
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B12/00—Arrangements for controlling delivery; Arrangements for controlling the spray area
    • B05B12/002—Manually-actuated controlling means, e.g. push buttons, levers or triggers
    • B05B12/0022—Manually-actuated controlling means, e.g. push buttons, levers or triggers associated with means for restricting their movement
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B12/00—Arrangements for controlling delivery; Arrangements for controlling the spray area
    • B05B12/002—Manually-actuated controlling means, e.g. push buttons, levers or triggers
    • B05B12/0022—Manually-actuated controlling means, e.g. push buttons, levers or triggers associated with means for restricting their movement
    • B05B12/0024—Manually-actuated controlling means, e.g. push buttons, levers or triggers associated with means for restricting their movement to a single position
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B9/00—Spraying apparatus for discharge of liquids or other fluent material, without essentially mixing with gas or vapour
    • B05B9/01—Spray pistols, discharge devices

Definitions

  • the present invention relates to a hand lance for spraying a plant treatment liquid.
  • hand lances are already known, each comprising, at the end of a flexible liquid supply pipe, a rigid handle, which is provided with an inlet valve and a trigger for control of this valve, and which is extended by rigid tube, carrying at its end a spray head.
  • a filter should generally be provided upstream of the spray head of such hand lances; experience has shown that this filter clogs fairly quickly; however, in hand lances of this type, which have been carried out so far, cleaning the filter is a long and difficult operation, since it requires the disassembly of several elements; this is the case in particular when the filter is disposed, in a known manner, at the connection between the reservoir of pressurized liquid on the one hand, and the corresponding end of the flexible hose supplying the lance, on the other hand go.
  • Document US-A-3 515 355 describes a hand lance provided with a tubular filter which is housed in the front part of the tubular handle of the lance, and is held there by a cap nut which also serves to maintain the projection nozzle, these two parts being clamped one on the other with the interposition of a safety ring.
  • the intake valve is placed in the handle upstream of the filter, so that the latter does not protect the valve against dirt deposits.
  • the cleaning of the valve moreover, requires the complete dismantling of the handle, and it is undoubtedly for this reason that it was necessary to place another filter located near the connection of entry of the liquid in the handle, which resulted in a complicated structure.
  • the object of the present invention is to provide a device of the type indicated above, in which the cleaning of the valve is not more difficult than that of the filter, and which is of simpler structure.
  • the invention therefore provides a hand lance for spraying a liquid, in particular a plant treatment liquid, comprising, at the end of a flexible liquid supply pipe, a rigid handle, which is provided with an inlet valve and a trigger for controlling this valve, and in the extension of which is mounted a spray head, said hand lance being further provided with a prismatic or cylindrical filter of which one base is open and the other is closed by an overhanging part, this filter being immobilized in the front part of the tubular handle located on the side of the spray head by a cap nut screwed onto said front part and serving to maintain the spray head (known from document US-A-3 515 355) characterized in that the projecting part which closes one of the bases of the filter is crossed in leaktight manner by the movable body of the intake valve, while the cap nut which immobilizes the filter compor a tubing, one end of which penetrates through the open base of the filter and carries the seat of the intake valve, the other end of this tubing serving for connection with the spray head,
  • the various parts housed in the tubular handle are dimensioned so that the cylindrical or prismatic filter is normally engaged over only a fraction of its length in the front part of said handle.
  • This arrangement further facilitates the extraction of the filter from the tubular handle, by the manipulations previously indicated, but, moreover, it allows access to the filter after the cap nut has been removed only, since said filter then protrudes, over a greater or lesser fraction of its length, beyond the open end of the front part of the tubular handle; in this position of the filter, still partially engaged in the tubular handle, it is indeed possible to carry out rapid cleaning of said filter, which may be sufficient in particular when it is not very dirty.
  • control trigger articulated on the part of the movable body of the intake valve, which is external to the filter, can project out of the tubular handle through a longitudinal slot, having a sufficient length to allow said trigger to be optionally engaged over its entire length inside the handle.
  • This arrangement makes it possible to prevent the trigger, articulated on the movable body of the intake valve, from obstructing the movement towards the outside of the assembly formed by the filter, its base, the movable body of the intake valve, the trigger, the flexible supply pipe and the rigid end piece which extends it, and does not even prevent the at least partial exit of this assembly, outside the tubular handle.
  • the control trigger may have, before it is articulated on the body of the valve, an extension cooperating with a fixed ramp arranged so that, when traction is applied manually to said trigger, said ramp guides its extension so that its articulation exerts on said valve body an overdrive traction which is sufficient to overcome the force of an automatic reclosing spring of said valve, and to produce the opening of the latter.
  • the ramp comprises a latching element, ensuring the temporary blocking of the trigger in a position corresponding to the opening of said valve.
  • the trigger for controlling the hand lance according to the present invention therefore allows, in addition to temporary openings, of controlled durations, of the intake valve, its permanent opening, obtained by bringing the trigger in a determined position.
  • FIGs 1 and 2 1 denotes a tubular handle, for example of molded plastic, which is open at both ends; on the front end of the handle 1, that is to say its end located to the left of Figure 1, on the side of the spray head - not shown in this figure - of the hand lance, is arranged a thread 1a, onto which a cap nut 2 can be screwed, for example a standard nut under the designation "34 gas".
  • This cap nut 2 is provided, in its central part, with a tube, one end of which, 2a, forms a projection in the direction of the spray head; in this tubing element 2a is engaged the corresponding end of a rigid tube 3, for example aluminum, on the other end of which is mounted the spray head, which will be described later.
  • a cap nut 4 is threaded onto the corresponding end of the rigid tube 3 and screwed onto a thread 2e, provided externally on the tubing element 2a, so as to immobilize said end of the rigid tube 3 inside said tubing 2a.
  • a filter 5 is immobilized, with a prismatic or cylindrical surface, including a base, disposed on the side of the cap nut 2, is open, while its other base, located inside the front part of the tubular handle 1, is closed by a piece 5a, of metal or plastic, which is sealed through by the movable body, in the form of a piston, 6a, of an intake valve.
  • the whole of the filtering wall and the base 5a of the filter 5 can be constituted for example by a single piece of molded plastic.
  • the base 5a of the filter protrudes on either side of its lateral filtering surface, in the form of a kind of annular flange 5b.
  • the cap nut 2 is provided on the one hand with an internal skirt-shaped element, 2c, which tightens the annular flange 5b of the base 5a of the filter 5 against an appropriate internal shoulder.
  • a single annular seal 8 provides sealing, with respect to the outside, of the annular chamber 7 previously defined.
  • the handle tubular 1 inside said tubular handle 1, the end of the flexible pipe 9 is mounted, so as to ensure sealing, on a rigid end piece 10, which is itself integral with the base 5a of the filter 5, in particular at level of its projecting part 5b; as seen in Figure 1, the inner channel of the nozzle 10 opens through an orifice 10a in the annular chamber 7 previously defined, that is to say in the interval between the skirt-shaped element 2c , of the cap nut 2, on the one hand, and the filtering side wall of the filter 5, on the other hand.
  • the cap nut 2 also comprises, in the extension of its external tubing element 2a, previously mentioned, an internal tubing element, 2b, the end of which penetrates through the open base of the filter 5 and carries the seat 6b of the valve. of admission.
  • the latter is kept normally closed, for example by an automatic reclosing spring, 11, which is engaged around the movable body 6a, in the form of a piston, and which bears, by one end, on the inner face of the base 5a of the filter. 5, and, by its other end, on a bearing arranged at the rear of the part of the movable body 6a intended to cooperate with the seat 6b.
  • the tubular handle 1 is further provided with a trigger for controlling the intake valve; this trigger 12 is articulated at 13 on the part of the movable body, 6a, of the intake valve, which is external to the filter 5; it can protrude out of the tubular handle 1 through a longitudinal slot, 1 c, having a length sufficient to allow said trigger 12 to be optionally engaged over its entire length inside the tubular handle 1, as indicated in solid lines in FIG. 2, where this fully retracted position of the trigger is designated by 12C.
  • the trigger, 12 has, in front of its articula tion 13 on the valve body, 6a, an extension 12a ( Figures 2 to 4), which cooperates with a ramp 14, integral with the projecting base, 5a, of the filter 5.
  • an extension 12a Figures 2 to 4
  • the trigger then in its almost vertical position, 12, corresponding to the closure automatic of the inlet valve by the spring 11, said trigger pivots about its articulation 13 in the direction of the arrow f (FIG.
  • the hand lance according to the present invention equipped with the handle described above, operates as follows:
  • the opening of the intake valve authorizes the passage of the treatment liquid in the tubing 2b of the cap nut 2, then into the rigid tube 3, with a flow rate which depends on the spacing between the movable body 6a of the intake valve and its seat 6b, therefore on the pivoting of the trigger from its closed position 12.
  • the spring 11 closes the inlet valve, which interrupts the spraying of treatment liquid, and, at the same time, the force resulting from the relaxation of the spring 11 is transmitted by the articulation 13 to the trigger of comm ande, so as to return it to its closed position 12.
  • the trigger is brought to its extreme position 12B, it is locked in this latter position by the cooperation of its extension 12a with the latching element, 14a, of the ramp 14 (FIG. 4), so that said trigger opposes the force exerted by the automatic reclosing spring 11; the inlet valve therefore remains in its open position, corresponding to the position 12B of the trigger, until the user exerts on the latter a thrust in the opposite direction to the arrow.f, said trigger being then returned to its closed position 12 by the action of the spring 11 as soon as the extension 12a of said trigger has ceased to cooperate with the latching element 14a.
  • the filter requires further cleaning, it is easy to remove it completely from the tubular handle 1 by pushing the flexible supply hose 9 to the left of FIGS. 1 and 2; this last figure shows in particular the filter 5 completely removed from the tubular handle 1; this filter outlet was made possible by the fact that the tubular handle 1 is provided internally with at least one projection 15 (FIG. 2), in particular in the form of a ramp, which is arranged so as to cooperate with at least one projection the trigger 12, in particular in the shape of a pin 16, so that, when the filter 5 is pushed into the front part of the tubular handle 1, towards the front, that is to say towards the left of FIG.
  • at least one projection 15 FIG. 2
  • the tubular handle 1 is provided internally with at least one projection 15 (FIG. 2), in particular in the form of a ramp, which is arranged so as to cooperate with at least one projection the trigger 12, in particular in the shape of a pin 16, so that, when the filter 5 is pushed into the front part of the tubular handle 1, towards the front, that is to say towards the
  • the trigger 12 pivots so as to completely enter the tubular handle 1, through the longitudinal slot 1c; Having reached its position 12C, the trigger obviously no longer opposes the extraction of the filter 5 from the handle 1.
  • the filter 5, completely removed from the handle 1 can then be thoroughly cleaned, by one of the previously indicated methods, and / or by brushing, then be re-engaged inside the tubular handle 1 by exerting on the flexible supply pipe, 9, a pull to the right of FIG. 2; during the movement of the assembly 5-5a-16a-9-10-12 to the right, the cooperation between the stud 16 of the control trigger and the ramp 15, causes the pivoting of said trigger from its position 12C up to 'at its position 12B. It then suffices to screw the cap nut 2 back onto the thread 1a of the tubular handle 1, then to manually return the trigger from its temporary blocking position 12B to its closed position 12.
  • the fraction, 1, of the length, L, of the filter which, according to FIG. 1, is engaged in the front part of the tubular handle 1, is optional material; the ratio 1 / L can in particular have any value, ranging between a minimum value, just sufficient to allow the overflowing base, 5a, of the filter 5 to be engaged in the tubular handle, and a maximum value, practically equal to 1.
  • the internal element 2c of the cap nut 2 (FIG. 1), instead of being in the form of a skirt, could consist of one or more internal projections, of substantially axial direction, and of appropriate length. Instead of being provided, beyond its articulation 13 on the body 6a of the valve, with an extension 12a cooperating with a fixed ramp 14, the control trigger 12 (FIGS.

Description

La présente invention concerne une lance à main pour la pulvérisation d'un liquide de traitement des plantes.The present invention relates to a hand lance for spraying a plant treatment liquid.

Pour cette application, on connaît déjà des lances à main, comportant chacune, à l'extrémité d'un tuyau souple d'alimentation en liquide, une poignée rigide, qui est munie d'un clapet d'admission et d'une gâchette de commande de ce clapet, et qui est prolongée par tube rigide, portant à son extrémité une tête de pulvérisation.For this application, hand lances are already known, each comprising, at the end of a flexible liquid supply pipe, a rigid handle, which is provided with an inlet valve and a trigger for control of this valve, and which is extended by rigid tube, carrying at its end a spray head.

Un filtre doit être généralement prévu en amont de la tête de pulvérisation des lances à main de ce genre ; l'expérience a montré que ce filtre s'encrasse assez rapidement ; cependant, dans les lances à main de ce type, qui ont été réalisées jusqu'à présent, le nettoyage du filtre est une opération longue et malaisée, puisqu'elle nécessite le démontage de plusieurs éléments ; c'est le cas notamment lorsque le filtre est disposé, de façon connue, au niveau du raccord entre le réservoir de liquide sous pression d'une part, et l'extrémité correspondante du tuyau souple d'alimentation de la lance, d'autre part.A filter should generally be provided upstream of the spray head of such hand lances; experience has shown that this filter clogs fairly quickly; however, in hand lances of this type, which have been carried out so far, cleaning the filter is a long and difficult operation, since it requires the disassembly of several elements; this is the case in particular when the filter is disposed, in a known manner, at the connection between the reservoir of pressurized liquid on the one hand, and the corresponding end of the flexible hose supplying the lance, on the other hand go.

Le document US-A- 3 515 355 décrit une lance à main pourvue d'un filtre tubulaire qui est logé dans la partie avant de la poignée tubulaire de la lance, et y est maintenu par un écrou à chapeau qui sert également à maintenir la buse de projection, ces deux pièces étant serrées l'une sur l'autre avec interposition d'une bague de sécurité. Dans ce dispositif connu, le clapet d'admission est placé dans la poignée en amont du filtre, si bien que celui-ci ne protège pas le clapet contre des dépôts d'encrassage. Le nettoyage du clapet, par ailleurs, exige le démontage complet de la poignée, et c'est sans doute pour cette raison qu'il a été nécessaire de placer un autre filtre situé à proximité du raccord d'entrée du liquide dans la poignée, ce qui a aboutit à une structure compliquée.Document US-A-3 515 355 describes a hand lance provided with a tubular filter which is housed in the front part of the tubular handle of the lance, and is held there by a cap nut which also serves to maintain the projection nozzle, these two parts being clamped one on the other with the interposition of a safety ring. In this known device, the intake valve is placed in the handle upstream of the filter, so that the latter does not protect the valve against dirt deposits. The cleaning of the valve, moreover, requires the complete dismantling of the handle, and it is undoubtedly for this reason that it was necessary to place another filter located near the connection of entry of the liquid in the handle, which resulted in a complicated structure.

Le but de la présente invention est de fournir un dispositif du type indiqué ci-dessus, dans lequel le nettoyage du clapet ne soit pas plus difficile que celui du filtre, et qui soit de structure plus simple.The object of the present invention is to provide a device of the type indicated above, in which the cleaning of the valve is not more difficult than that of the filter, and which is of simpler structure.

L'invention fournit donc une lance à main pour la pulvérisation d'un liquide, notamment d'un liquide de traitement des plantes, comportant, à l'extrémité d'un tuyau souple d'alimentation en liquide, une poignée rigide, qui est munie d'un clapet d'admission et d'une gâchette de commande de ce clapet, et dans le prolongement de laquelle est montée une tête de pulvérisation, ladite lance à main étant pourvue, en outre, d'un filtre prismatique ou cylindrique dont une base est ouverte et l'autre est fermée par une pièce débordante, ce filtre étant immobilisé dans la partie avant de la poignée tubulaire située du côté de la tête de pulvérisation par un écrou à chapeau vissé sur ladite partie avant et servant au maintien de la tête de pulvérisation, (connue du document US-A- 3 515 355) caractérisée en ce que la pièce débordante qui ferme une des bases du filtre est traversée de façon étanche par le corps mobile du clapet d'admission, alors que l'écrou à chapeau qui immobilise le filtre comporte une tubulure dont une extrémité pénètre par la base ouverte du filtre et porte le siège du clapet d'admission, l'autre extrémité de cette tubulure servant au raccordement avec la tête de pulvérisation, et en ce qu'un embout rigide, prolongeant le tuyau souple d'alimentation, à l'intérieur de la poignée tubulaire, est solidaire de la pièce de base du filtre, de façon à déboucher dans une chambre annulaire comprise entre, d'une part, la paroi du filtre et, d'autre part, les parois internes de la poignée tubulaire, et, éventuellement, de l'écrou à chapeau.The invention therefore provides a hand lance for spraying a liquid, in particular a plant treatment liquid, comprising, at the end of a flexible liquid supply pipe, a rigid handle, which is provided with an inlet valve and a trigger for controlling this valve, and in the extension of which is mounted a spray head, said hand lance being further provided with a prismatic or cylindrical filter of which one base is open and the other is closed by an overhanging part, this filter being immobilized in the front part of the tubular handle located on the side of the spray head by a cap nut screwed onto said front part and serving to maintain the spray head (known from document US-A-3 515 355) characterized in that the projecting part which closes one of the bases of the filter is crossed in leaktight manner by the movable body of the intake valve, while the cap nut which immobilizes the filter compor a tubing, one end of which penetrates through the open base of the filter and carries the seat of the intake valve, the other end of this tubing serving for connection with the spray head, and in that a rigid end piece, extending the flexible supply hose, inside the tubular handle, is integral with the base part of the filter, so as to open into an annular chamber between, on the one hand, the wall of the filter and, on the other apart, the internal walls of the tubular handle, and possibly of the cap nut.

Dans une forme de réalisation préférée de la lance à main selon la présente invention, les différentes pièces logées dans la poignée tubulaire sont dimensionnées de façon que le filtre cylindrique ou prismatique soit normalement engagé sur une fraction seulement de sa longueur dans la partie avant de ladite poignée. Cette disposition facilite encore davantage l'extraction du filtre hors de la poignée tubulaire, par les manipulations précédemment indiquées, mais, en outre, elle permet d'accéder au filtre après le seul enlèvement de l'écrou à chapeau, puisqu'alors ledit filtre fait saillie, sur une fraction plus ou moins importante de sa longueur, au-delà de l'extrémité ouverte de la partie avant de la poignée tubulaire ; dans cette position du filtre, encore partiellement engagé dans la poignée tubulaire, il est en effet possible de procéder à un nettoyage rapide dudit filtre, ce qui peut être suffisant notamment lorsqu'il n'est pas très encrassé.In a preferred embodiment of the hand lance according to the present invention, the various parts housed in the tubular handle are dimensioned so that the cylindrical or prismatic filter is normally engaged over only a fraction of its length in the front part of said handle. This arrangement further facilitates the extraction of the filter from the tubular handle, by the manipulations previously indicated, but, moreover, it allows access to the filter after the cap nut has been removed only, since said filter then protrudes, over a greater or lesser fraction of its length, beyond the open end of the front part of the tubular handle; in this position of the filter, still partially engaged in the tubular handle, it is indeed possible to carry out rapid cleaning of said filter, which may be sufficient in particular when it is not very dirty.

Selon une autre caractéristique avantageuse de l'invention, la gâchette de commande, articulée sur la partie du corps mobile du clapet d'admission, qui est extérieure au filtre, peut faire saillie hors de la poignée tubulaire à travers une fente longitudinale, présentant une longueur suffisante pour permettre à ladite gâchette d'être éventuellement engagée sur toute sa longueur à l'intérieur de la poignée. Cette disposition permet déviter que la gâchette, articulée sur le corps mobile du clapet d'admission, ne fasse obstacle au déplacement vers l'extérieur de l'ensemble formé par le filtre, sa base, le corps mobile du clapet d'admission, la gâchette, le tuyau souple d'alimentation et l'embout rigide qui le prolonge, et ne s'oppose même à la sortie, au moins partielle, de cet ensemble, hors de la poignée tubulaire.According to another advantageous characteristic of the invention, the control trigger, articulated on the part of the movable body of the intake valve, which is external to the filter, can project out of the tubular handle through a longitudinal slot, having a sufficient length to allow said trigger to be optionally engaged over its entire length inside the handle. This arrangement makes it possible to prevent the trigger, articulated on the movable body of the intake valve, from obstructing the movement towards the outside of the assembly formed by the filter, its base, the movable body of the intake valve, the trigger, the flexible supply pipe and the rigid end piece which extends it, and does not even prevent the at least partial exit of this assembly, outside the tubular handle.

Selon un autre perfectionnement avantageux suivant l'invention, la gâchette de commande peut présenter, en avant de son articulation sur le corps du clapet, un prolongement coopérant avec une rampe fixe aménagée de façon que, quand une traction est appliquée manuellement sur ladite gâchette, ladite rampe guide son prolongement de manière que son articulation exerce sur ledit corps de clapet une traction surmultipliée qui suffit pour surmonter la force d'un ressort de refermeture automatique dudit clapet, et produire l'ouverture de ce dernier. De préférence aussi, la rampe comporte un élément d'encliquetage, assurant le blocage temporaire de la gâchette dans une position correspondant à l'ouverture dudit clapet. Dans cette forme de réalisation préférée. la gâchette de commande de la lance à main selon la présente invention permet donc, en plus d'ouvertures temporaires, de durées contrôlées, du clapet d'admission, son ouverture permanente, obtenue en amenant la gâchette dans une position déterminée.According to another advantageous improvement according to the invention, the control trigger may have, before it is articulated on the body of the valve, an extension cooperating with a fixed ramp arranged so that, when traction is applied manually to said trigger, said ramp guides its extension so that its articulation exerts on said valve body an overdrive traction which is sufficient to overcome the force of an automatic reclosing spring of said valve, and to produce the opening of the latter. Preferably also, the ramp comprises a latching element, ensuring the temporary blocking of the trigger in a position corresponding to the opening of said valve. In this preferred embodiment. the trigger for controlling the hand lance according to the present invention therefore allows, in addition to temporary openings, of controlled durations, of the intake valve, its permanent opening, obtained by bringing the trigger in a determined position.

A titre d'exemples, on a décrit ci-dessous et illustré schématiquement au dessin annexé plusieurs formes de réalisation de la lance à main selon la présente invention.By way of examples, several embodiments of the hand lance according to the present invention have been described below and illustrated diagrammatically in the accompanying drawing.

  • La figure 1 est une vue, en coupe par un plan axial, de la poignée d'une lance à main selon la présente invention.Figure 1 is a view, in section through an axial plane, of the handle of a hand lance according to the present invention.
  • La figure 2 est une vue en coupe partielle, illustrant l'extraction du filtre hors de la poignée tubulaire représentée sur la figure 1.FIG. 2 is a partial sectional view, illustrating the extraction of the filter from the tubular handle shown in FIG. 1.
  • Les figures 3 et 4 montrent respectivement deux positions actives différentes de la gâchette de commande dont est munie la poignée des figures 1 et 2.FIGS. 3 and 4 respectively show two different active positions of the control trigger with which the handle of FIGS. 1 and 2 is provided.

Sur les figures 1 et 2, 1 désigne une poignée tubulaire, par exemple en matière plastique moulée, qui est ouverte à ses deux extrémités ; sur l'extrémité avant de la poignée 1, c'est-à-dire son extrémité située vers la gauche de la figure 1, du côté de la tête de pulvérisation - non représentée sur cette figure - de la lance à main, est aménagé un filetage 1a, sur lequel peut être vissé un écrou à chapeau 2, par exemple un écrou normalisé sous la désignation « 34 gaz ». Cet écrou à chapeau 2 est muni, dans sa partie centrale, d'une tubulure, dont une extrémité, 2a, forme une saillie en direction de la tête de pulvérisation ; dans cet élément de tubulure 2a est engagée l'extrémité correspondante d'un tube rigide 3, par exemple en aluminium, sur l'autre extrémité duquel est montée la tête de pulvérisation, qui sera décrite ultérieurement. Un écrou à chapeau 4 est enfilé sur l'extrémité correspondante du tube rigide 3 et vissé sur un filetage 2e, prévu extérieurement sur l'élément de tubulure 2a, de façon à immobiliser ladite extrémité du tube rigide 3 à l'intérieur de ladite tubulure 2a. Dans la chambre formée par l'intérieur de l'écrou à chapeau 2 et la partie avant, ouverte, de la poignée tubulaire 1, est immobilisé un filtre 5, à surface prismatique ou cylindrique, dont une base, disposée du côté de l'écrou à chapeau 2, est ouverte, tandis que son autre base, située à l'intérieur de la partie avant de la poignée tubulaire 1, est fermée par une pièce 5a, en métal ou en matière plastique, qui est traversée de façon étanche par le corps mobile, en forme de piston, 6a, d'un clapet d'admission. L'ensemble de la paroi filtrante et de la base 5a du filtre 5 peut être constitué par exemple par une pièce unique en matière plastique moulée. La base 5a du filtre déborde de part et d'autre de sa surface latérale filtrante, sous la forme d'une sorte de bride annulaire 5b. Pour assurer le serrage du filtre, l'écrou à chapeau 2 est pourvu d'une part d'un élément intérieur en forme de jupe, 2c, qui vient serrer la bride annulaire 5b de la base 5a du filtre 5 contre un épaulement intérieur approprié, 1b, de la poignée tubulaire ; l'autre base, ouverte, du filtre 5 vient par contre s'appliquer, lors du serrage de l'écrou à chapeau 2 sur le filetage 1a de la poignée tubulaire 1, contre une portée 2d aménagée à l'intérieur de l'écrou à chapeau 2, dans une position telle qu'il subsiste une chambre annulaire étroite, 7, entre, d'une part, l'élément en forme de jupe 2c, de l'écrou à chapeau 2, et, d'autre part, la surface latérale filtrante du filtre 5. Un joint d'étanchéité annulaire, 8, unique, assure l'étanchéité, par rapport à l'extérieur, de la chambre annulaire 7 précédemment définie. Un tuyau souple d'alimentation en liquide de traitement, 9, dont une extrémité est raccordée à un réservoir de liquide sous pression, pénètre, par son autre extrémité, dans la partie arrière (à droite sur les figures 1 et 2) de la poignée tubulaire 1 ; à l'intérieur de ladite poignée tubulaire 1, l'extrémité du tuyau souple 9 est montée, de façon à assurer l'étanchéité, sur un embout rigide 10, qui est lui-même solidaire de la base 5a du filtre 5, notamment au niveau de sa partie débordante 5b ; comme on le voit sur la figure 1, le canal intérieur de l'embout 10 débouche par un orifice 10a dans la chambre annulaire 7 précédemment définie, c'est-à-dire dans l'intervalle entre l'élément en forme de jupe 2c, de l'écrou à chapeau 2, d'une part, et la paroi latérale filtrante du filtre 5, d'autre part.In Figures 1 and 2, 1 denotes a tubular handle, for example of molded plastic, which is open at both ends; on the front end of the handle 1, that is to say its end located to the left of Figure 1, on the side of the spray head - not shown in this figure - of the hand lance, is arranged a thread 1a, onto which a cap nut 2 can be screwed, for example a standard nut under the designation "34 gas". This cap nut 2 is provided, in its central part, with a tube, one end of which, 2a, forms a projection in the direction of the spray head; in this tubing element 2a is engaged the corresponding end of a rigid tube 3, for example aluminum, on the other end of which is mounted the spray head, which will be described later. A cap nut 4 is threaded onto the corresponding end of the rigid tube 3 and screwed onto a thread 2e, provided externally on the tubing element 2a, so as to immobilize said end of the rigid tube 3 inside said tubing 2a. In the chamber formed by the inside of the cap nut 2 and the open front part of the tubular handle 1, a filter 5 is immobilized, with a prismatic or cylindrical surface, including a base, disposed on the side of the cap nut 2, is open, while its other base, located inside the front part of the tubular handle 1, is closed by a piece 5a, of metal or plastic, which is sealed through by the movable body, in the form of a piston, 6a, of an intake valve. The whole of the filtering wall and the base 5a of the filter 5 can be constituted for example by a single piece of molded plastic. The base 5a of the filter protrudes on either side of its lateral filtering surface, in the form of a kind of annular flange 5b. To secure the filter, the cap nut 2 is provided on the one hand with an internal skirt-shaped element, 2c, which tightens the annular flange 5b of the base 5a of the filter 5 against an appropriate internal shoulder. , 1b, of the tubular handle; the other, open base of the filter 5, on the other hand, is applied, when the cap nut 2 is tightened on the thread 1a of the tubular handle 1, against a bearing 2d arranged inside the nut with cap 2, in a position such that a narrow annular chamber remains, 7, between, on the one hand, the skirt-shaped element 2c, of the cap nut 2, and, on the other hand, the filtering lateral surface of the filter 5. A single annular seal 8 provides sealing, with respect to the outside, of the annular chamber 7 previously defined. A flexible hose for supplying treatment liquid, 9, one end of which is connected to a tank of pressurized liquid, penetrates, by its other end, into the rear part (on the right in FIGS. 1 and 2) of the handle tubular 1; inside said tubular handle 1, the end of the flexible pipe 9 is mounted, so as to ensure sealing, on a rigid end piece 10, which is itself integral with the base 5a of the filter 5, in particular at level of its projecting part 5b; as seen in Figure 1, the inner channel of the nozzle 10 opens through an orifice 10a in the annular chamber 7 previously defined, that is to say in the interval between the skirt-shaped element 2c , of the cap nut 2, on the one hand, and the filtering side wall of the filter 5, on the other hand.

L'écrou à chapeau 2 comporte également, dans le prolongement de son élément de tubulure extérieur 2a, précédemment mentionné, un élément de tubulure intérieur, 2b, dont l'extrémité pénètre par la base ouverte du filtre 5 et porte le siège 6b du clapet d'admission. Ce dernier est maintenu normalement fermé par exemple par un ressort de refermeture automatique, 11, qui est engagé autour du corps mobile 6a, en forme de piston, et qui prend appui, par une extrémité, sur la face intérieure de la base 5a du filtre 5, et, par son autre extrémité, sur une portée aménagée à l'arrière de la partie du corps mobile 6a destinée à coopérer avec le siège 6b.The cap nut 2 also comprises, in the extension of its external tubing element 2a, previously mentioned, an internal tubing element, 2b, the end of which penetrates through the open base of the filter 5 and carries the seat 6b of the valve. of admission. The latter is kept normally closed, for example by an automatic reclosing spring, 11, which is engaged around the movable body 6a, in the form of a piston, and which bears, by one end, on the inner face of the base 5a of the filter. 5, and, by its other end, on a bearing arranged at the rear of the part of the movable body 6a intended to cooperate with the seat 6b.

La poignée tubulaire 1 est en outre munie d'une gâchette de commande du clapet d'admission ; cette gâchette 12 est articulée en 13 sur la partie du corps mobile, 6a, du clapet d'admission, qui est extérieure au filtre 5 ; elle peut faire saillie hors de la poignée tubulaire 1 à travers une fente longitudinale, 1 c, présentant une longueur suffisante pour permettre à ladite gâchette 12 d'être éventuellement engagée sur toute sa longueur à l'intérieur de la poignée tubulaire 1, comme indiqué en trait plein sur la figure 2, où cette position, entièrement rentrée, de la gâchette est désignée par 12C.The tubular handle 1 is further provided with a trigger for controlling the intake valve; this trigger 12 is articulated at 13 on the part of the movable body, 6a, of the intake valve, which is external to the filter 5; it can protrude out of the tubular handle 1 through a longitudinal slot, 1 c, having a length sufficient to allow said trigger 12 to be optionally engaged over its entire length inside the tubular handle 1, as indicated in solid lines in FIG. 2, where this fully retracted position of the trigger is designated by 12C.

Selon une autre caractéristique de l'invention, la gâchette, 12, présente, en avant de son articulation 13 sur le corps du clapet, 6a, un prolongement 12a (figures 2 à 4), qui coopère avec une rampe 14, solidaire de la base débordante, 5a, du filtre 5. Lorsque l'un des doigts de la main de l'utilisateur, qui porte la lance par sa poignée 1, tire vers l'arrière, c'est-à-dire vers la droite des différentes figures 1 à 4, la gâchette alors dans sa position presque verticale, 12, correspondant à la fermeture automatique du clapet d'admission par le ressort 11, ladite gâchette pivote autour de son articulation 13 dans le sens de la flèche f (figure 1), par exemple jusqu'à une première position, inclinée vers l'arrière, 12A (voir notamment les figures 1 à 3) ; sous l'effet de la traction, la gâchette 12 a pris appui par son prolongement 12a contre la rampe fixe 14, de telle sorte que son articulation 13 a exercé sur le corps de clapet 6a, une traction surmultipliée qui, en surmontant la force du ressort de refermeture automatique 11, a fait s'écarter le corps de clapet 6a de son siège 6b. Lorsque la gâchette a été amenée dans une position extrême 12B (voir notamment les figures 1, 2 et 4) le prolongement 12a de ladite gâchette vient coopérer avec un élément d'encliquetage, 14a, prévu sur la partie correspondante de la rampe 14, et aménagé de façon à bloquer temporairement ladite gâchette dans sa position 12B, correspondant à l'ouverture du clapet 6a-6b.According to another characteristic of the invention, the trigger, 12, has, in front of its articula tion 13 on the valve body, 6a, an extension 12a (Figures 2 to 4), which cooperates with a ramp 14, integral with the projecting base, 5a, of the filter 5. When one of the fingers of the hand of the user, who carries the lance by its handle 1, pulls backwards, that is to say to the right of the different figures 1 to 4, the trigger then in its almost vertical position, 12, corresponding to the closure automatic of the inlet valve by the spring 11, said trigger pivots about its articulation 13 in the direction of the arrow f (FIG. 1), for example to a first position, inclined backwards, 12A (see in particular Figures 1 to 3); under the effect of traction, the trigger 12 is supported by its extension 12a against the fixed ramp 14, so that its articulation 13 exerted on the valve body 6a, an overdrive traction which, by overcoming the force of the automatic reclosing spring 11, caused the valve body 6a to move away from its seat 6b. When the trigger has been brought into an extreme position 12B (see in particular FIGS. 1, 2 and 4) the extension 12a of said trigger cooperates with a latching element, 14a, provided on the corresponding part of the ramp 14, and arranged so as to temporarily block said trigger in its position 12B, corresponding to the opening of the valve 6a-6b.

La lance à main selon la présente invention, équipée de la poignée précédemment décrite, fonctionne de la façon suivante :The hand lance according to the present invention, equipped with the handle described above, operates as follows:

Lorsque du liquide de traitement sous pression parvient dans la chambre annulaire 7, par le tuyau souple d'alimentation 9 et l'embout 10, il pénètre à l'intérieur du filtre 5 en traversant sa paroi latérale filtrante. Tant qu'aucun effort n'est exercé sur la gâchette de commande du clapet d'admission, qui occupe alors sa position 12, le liquide de traitement qui a pénétré à l'intérieur du filtre 5 ne peut pas parvenir dans le tube rigide 3. Lorsque par contre l'utilisateur fait pivoter la gâchette 12 dans le sens de la flèche f (figure 1) par exemple jusqu'à une position 12A, l'ouverture du clapet d'admission autorise le passage du liquide de traitement dans la tubulure 2b de l'écrou à chapeau 2, puis dans le tube rigide 3, avec un débit qui dépend de l'écartement entre le corps mobile 6a du clapet d'admission et son siège 6b, donc du pivotement de la gâchette à partir de sa position de fermeture 12. Si l'utilisateur relâche la gâchette à partir d'une position telle que 12A, le ressort 11 referme le clapet d'admission, ce qui interrompt la pulvérisation de liquide de traitement, et, en même temps, l'effort résultant de la détente du ressort 11 est transmis par l'articulation 13 à la gâchette de commande, de façon à ramener celle-ci dans sa position de fermeture 12. Si par contre, à partir d'une position d'ouverture telle que 12A, la gâchette est amenée dans sa position extrême 12B, elle est bloquée dans cette dernière position par la coopération de son prolongement 12a avec l'élément d'encliquetage, 14a, de la rampe 14 (figure 4), si bien que ladite gâchette s'oppose à l'effort exercé par le ressort de refermeture automatique 11 ; le clapet d'admission reste donc dans sa position d'ouverture, correspondant à la position 12B de la gâchette, jusqu'à ce que l'utilisateur exerce sur cette dernière une poussée dans le sens contraire de la.flèche f, ladite gâchette étant ensuite ramenée dans sa position de fermeture 12 par l'action du ressort 11 dès que le prolongement 12a de ladite gâchette a cessé de coopérer avec l'élément d'encliquetage 14a.When pressure treatment liquid arrives in the annular chamber 7, through the flexible supply pipe 9 and the nozzle 10, it penetrates inside the filter 5 by passing through its lateral filtering wall. As long as no force is exerted on the control trigger of the inlet valve, which then occupies its position 12, the treatment liquid which has penetrated inside the filter 5 cannot reach the rigid tube 3 When, on the other hand, the user rotates the trigger 12 in the direction of the arrow f (FIG. 1), for example to a position 12A, the opening of the intake valve authorizes the passage of the treatment liquid in the tubing 2b of the cap nut 2, then into the rigid tube 3, with a flow rate which depends on the spacing between the movable body 6a of the intake valve and its seat 6b, therefore on the pivoting of the trigger from its closed position 12. If the user releases the trigger from a position such as 12A, the spring 11 closes the inlet valve, which interrupts the spraying of treatment liquid, and, at the same time, the force resulting from the relaxation of the spring 11 is transmitted by the articulation 13 to the trigger of comm ande, so as to return it to its closed position 12. If on the other hand, from an open position such as 12A, the trigger is brought to its extreme position 12B, it is locked in this latter position by the cooperation of its extension 12a with the latching element, 14a, of the ramp 14 (FIG. 4), so that said trigger opposes the force exerted by the automatic reclosing spring 11; the inlet valve therefore remains in its open position, corresponding to the position 12B of the trigger, until the user exerts on the latter a thrust in the opposite direction to the arrow.f, said trigger being then returned to its closed position 12 by the action of the spring 11 as soon as the extension 12a of said trigger has ceased to cooperate with the latching element 14a.

Pour procéder au nettoyage du filtre 5, il suffit de dévisser l'écrou à chapeau 2 jusqu'à ce qu'il soit possible de le séparer de la poignée tubulaire 1. Avec la disposition illustrée sur la figure 1, le filtre, en position de service, n'est engagé que sur une fraction seulement, 1, de sa longueur L, à l'intérieur de la partie avant de la poignée tubulaire 1. Par suite, après enlèvement de l'écrou à chapeau 2, le filtre 5 fait saillie au-delà de la partie avant de la poignée tubulaire 1, sur une longueur (L - 1), si bien que, s'il n'est pas trop encrassé, il est possible de le nettoyer sans le sortir complètement de ladite poignée 1, par exemple en le passant sous un robinet d'eau courante ou bien en l'immergeant dans un récipient d'eau et en l'y agitant. Si par contre le filtre nécessite un nettoyage plus poussé, il est facile de le faire sortir complètement de la poignée tubulaire 1 en poussant le tuyau souple d'alimentation 9 vers la gauche des figures 1 et 2 ; cette dernière figure montre notamment le filtre 5 complètement sorti de la poignée tubulaire 1 ; cette sortie du filtre a été rendue possible par le fait que la poignée tubulaire 1 est munie intérieurement d'au moins une saillie 15 (figure 2), notamment en forme de rampe, qui est disposée de façon à coopérer avec au moins une saillie de la gâchette 12, notamment en forme de têton 16, de façon que, quand le filtre 5 est poussé dans la partie avant de la poignée tubulaire 1, vers l'avant, c'est-à-dire vers la gauche de la figure 2, la gâchette 12 pivote de façon à rentrer complètement dans la poignée tubulaire 1, par la fente longitudinale 1c ; parvenue dans sa position 12C, la gâchette ne s'oppose évidemment plus à l'extraction du filtre 5 hors de la poignée 1. Le filtre 5, complètement sorti de la poignée 1, peut être alors nettoyé à fond, par l'une des méthodes précédemment indiquées, et/ou par brossage, puis être réengagé à l'intérieur de la poignée tubulaire 1 en exerçant sur le tuyau souple d'alimentation, 9, une traction vers la droite de la figure 2 ; au cours du déplacement de l'ensemble 5-5a-16a-9-10-12 vers la droite, la coopération entre le téton 16 de la gâchette de commande et la rampe 15, provoque le pivotement de ladite gâchette depuis sa position 12C jusqu'à sa position 12B. Il suffit ensuite de revisser l'écrou à chapeau 2 sur le filetage 1a de la poignée tubulaire 1, puis de ramener manuellement la gâchette de sa position de blocage temporaire 12B vers sa position de fermeture 12.To clean the filter 5, simply unscrew the cap nut 2 until it is possible to separate it from the tubular handle 1. With the arrangement illustrated in Figure 1, the filter in position service, is engaged only on a fraction, 1, of its length L, inside the front part of the tubular handle 1. As a result, after removal of the cap nut 2, the filter 5 protrudes beyond the front part of the tubular handle 1, over a length (L - 1), so that, if it is not too dirty, it is possible to clean it without removing it completely from said handle 1, for example by passing it under a tap with running water or by immersing it in a container of water and shaking it. If, on the other hand, the filter requires further cleaning, it is easy to remove it completely from the tubular handle 1 by pushing the flexible supply hose 9 to the left of FIGS. 1 and 2; this last figure shows in particular the filter 5 completely removed from the tubular handle 1; this filter outlet was made possible by the fact that the tubular handle 1 is provided internally with at least one projection 15 (FIG. 2), in particular in the form of a ramp, which is arranged so as to cooperate with at least one projection the trigger 12, in particular in the shape of a pin 16, so that, when the filter 5 is pushed into the front part of the tubular handle 1, towards the front, that is to say towards the left of FIG. 2 , the trigger 12 pivots so as to completely enter the tubular handle 1, through the longitudinal slot 1c; Having reached its position 12C, the trigger obviously no longer opposes the extraction of the filter 5 from the handle 1. The filter 5, completely removed from the handle 1, can then be thoroughly cleaned, by one of the previously indicated methods, and / or by brushing, then be re-engaged inside the tubular handle 1 by exerting on the flexible supply pipe, 9, a pull to the right of FIG. 2; during the movement of the assembly 5-5a-16a-9-10-12 to the right, the cooperation between the stud 16 of the control trigger and the ramp 15, causes the pivoting of said trigger from its position 12C up to 'at its position 12B. It then suffices to screw the cap nut 2 back onto the thread 1a of the tubular handle 1, then to manually return the trigger from its temporary blocking position 12B to its closed position 12.

La fraction, 1, de la longueur, L, du filtre qui, selon la figure 1, est engagée dans la partie avant de la poignée tubulaire 1, est matière à option ; le rapport 1/L peut en particulier avoir une valeur quelconque, comprise entre une valeur minimale, juste suffisante, pour permettre l'engagement de la base débordante, 5a, du filtre 5 dans la poignée tubulaire, et une valeur maximale, pratiquement égale à 1. L'élément intérieur 2c de l'écrou à chapeau 2 (figure 1), au lieu d'être en forme de jupe, pourrait être constitué par une ou plusieurs saillies intérieures, de direction sensiblement axiale, et de longueur appropriée. Au lieu d'être munie, au-delà de son articulation 13 sur le corps 6a du clapet, d'un prolongement 12a coopérant avec une rampe fixe 14, la gâchette de commande 12 (figures 2 à 4) pourrait être montée différemment, d'une façon plus classique : son prolongement 12a pourrait être articulé en un point fixe de la base 5a du filtre 5 ou de la tubulure rigide 10, ladite gâchette étant en outre munie d'une rainure axiale coopérant avec un axe 13, solidaire de la partie 6a du corps de clapet ; d'autres réalisations mécaniques, connues, pourraient être utilisées. Le tube rigide 3, au lieu de constituer une pièce indépendante de la poignée tubulaire 1, pourrait être formé par un prolongement tubulaire de celle-ci, à l'extrémité libre duquel serait montée la tête de pulvérisation.The fraction, 1, of the length, L, of the filter which, according to FIG. 1, is engaged in the front part of the tubular handle 1, is optional material; the ratio 1 / L can in particular have any value, ranging between a minimum value, just sufficient to allow the overflowing base, 5a, of the filter 5 to be engaged in the tubular handle, and a maximum value, practically equal to 1. The internal element 2c of the cap nut 2 (FIG. 1), instead of being in the form of a skirt, could consist of one or more internal projections, of substantially axial direction, and of appropriate length. Instead of being provided, beyond its articulation 13 on the body 6a of the valve, with an extension 12a cooperating with a fixed ramp 14, the control trigger 12 (FIGS. 2 to 4) could be mounted differently, d in a more conventional way: its extension 12a could be articulated at a fixed point of the base 5a of the filter 5 or of the rigid tube 10, said trigger being further provided with an axial groove cooperating with an axis 13, integral with the part 6a of the valve body; other known mechanical embodiments could be used. The rigid tube 3, instead of constituting an independent part of the tubular handle 1, could be formed by a tubular extension of the latter, at the free end of which the spray head would be mounted.

Claims (9)

1. A hand-held spray gun for dispersing a liquid, particularly a plant treatment liquid, comprising, at the end of a flexible liquid feed pipe, a rigid handle, which is provided with an inlet valve and an operating trigger of this valve, and in an extension of which a spraying head is mounted, said hand-held spray gun being provided also with a prismatic or cylindrical filter (5) of which one end is open and the other end is closed by a projecting piece (5a), this filter being fixed in the part on the front of the tubular handle (1) situated on the side of the spraying head by a box-nut (2) screwed onto said part in front of the handle and serving for the maintenance of the spraying head, characterised in that the projecting piece (5a) which closes one of the ends of the filter (5) is traversed in a water-tight manner by the movable body of the inlet valve, whilst the box-nut (2) by means of which the filter (5) is fixed comprises a tube of which one end (2b) extends through the open end of the filter (5) and carries the seat (6b) of the inlet valve, the other end (2a) of this tube serving for coupling of the spraying head, and in that a rigid mouthpiece (10), extending the flexible feed pipe (9) on the interior of the tubular handle (1), is integral with the end piece (5a) of the filter (5), so as to discharge into an annular chamber (7) between, on the one hand, the wall of the filter (5) and, on the other hand, the internal walls of the tubular handle (1), and, possibly, of the box-nut (2).
2. A hand-held spray gun according to claim 1, characterised in that the different parts situated in the tubular handle (1) are dimensioned such that the prismatic or cylindrical filter (5) is normally engaged over only a fraction (1) of its length (L) in the part in front of said handle (1).
3. A hand-held spray gun according to any one of the claims 1 to 2, characterised in that the projecting end (5b) of the filter (5) is locked against an interior annular projection (1 b) of the tubular handle (1) by at least one interior element (2c) of the box-nut (2), this interior element (2c) being for example in the form of a skirt.
4. A hand-held spray gun according to claim 3, characterised in that a single water-tight joint (8) is connected to the projecting end (5b) of the filter (5).
5. A hand-held spray gun according to any one of claims 1 to 4, characterised in that the operating trigger (12), linked to the part of the movable body (6a) of the inlet valve which is external to the filter (5), can project from the tubular handle (1) through a longitudinal slit (1c), presenting a sufficient length to allow said trigger (12C) to possibly be engaged over its entire length to the interior of the handle (1).
6. A hand-held spray gun according to claim 5, characterised in that the tubular handle (1) is supplied internally with at least one projection (15), for example in the form of a ramp, disposed in such a manner as to cooperate with at least one projection (16) of the trigger (12), for example in the form of a teat, in such a way that, when the filter (5) is pushed into the part in front of said handle (1), towards the front or towards the rear of the latter, the trigger (12) pivots such as to return completely into the tubular handle (1) or to partially project from it through the corresponding slit (1c).
7. A hand-held spray gun according to any one of claims 1 to 6, characterised in that the operating trigger (12), attached to the body (6a) of the valve by a connection (13), has, in front of said connection, an extension (12a) which cooperates with a fixed ramp (14), arranged such that when a force is applied manually to said trigger (12), said ramp (14) guides its extension (12a) such that its connection (13) exerts a multiplied force on said body of the valve (6a), which is sufficient to surmount the force of an automatic closing spring (11) of said valve and produces opening of the latter.
8. A hand-held spray gun according to claim 7, characterised in that the ramp (14) comprises a ratchet element (14a), assuring the temporary blocking of the trigger in a position (12B) corresponding to the opening of the valve (6a-6b).
9. A hand-held spray gun according to one of claims 7 or 8, characterised in that the fixed ramp (14) is carried through the end piece (5a) of the filter.
EP82401507A 1981-08-13 1982-08-09 Hand held spraygun for dispersing a plant treatment liquid Expired EP0072746B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8115674A FR2511269A1 (en) 1981-08-13 1981-08-13 HAND LANCE FOR SPRAYING A PLANT TREATMENT FLUID
FR8115674 1981-08-13

Publications (3)

Publication Number Publication Date
EP0072746A2 EP0072746A2 (en) 1983-02-23
EP0072746A3 EP0072746A3 (en) 1984-07-18
EP0072746B1 true EP0072746B1 (en) 1987-07-29

Family

ID=9261450

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82401507A Expired EP0072746B1 (en) 1981-08-13 1982-08-09 Hand held spraygun for dispersing a plant treatment liquid

Country Status (6)

Country Link
US (1) US4518122A (en)
EP (1) EP0072746B1 (en)
BR (1) BR8204712A (en)
DE (1) DE3276855D1 (en)
FR (1) FR2511269A1 (en)
NZ (1) NZ201540A (en)

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US7677476B2 (en) * 2005-05-02 2010-03-16 Campbell Hausfeld/Scott Fetzer Company Extension pole apparatus
TWM291840U (en) * 2006-01-05 2006-06-11 Wang Jin Yuan Rotary/ swing type water gun structure
US7789327B2 (en) * 2007-05-31 2010-09-07 Illinois Tool Works Inc. Modular spray gun with replaceable components
US8313047B2 (en) * 2007-12-10 2012-11-20 Micheli Paul R Spray gun having adjustable handle
EP3476421B1 (en) * 2017-10-24 2021-04-07 Thomas Kemper Applicator with simplified cleaning

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Also Published As

Publication number Publication date
EP0072746A3 (en) 1984-07-18
US4518122A (en) 1985-05-21
EP0072746A2 (en) 1983-02-23
NZ201540A (en) 1986-03-14
FR2511269B1 (en) 1983-12-09
DE3276855D1 (en) 1987-09-03
BR8204712A (en) 1983-08-02
FR2511269A1 (en) 1983-02-18

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