FR2526402A3 - HAND PUMP WITH BLOCKABLE DISPENSER CAP IN LOWERED POSITION FOR THE DISPENSING OF FLUID MATERIALS - Google Patents

Abstract

THE PUMP INCLUDES A DISTRIBUTOR CAP 13 MOUNTED ON THE ROD 6 OF THE PUMP. THIS ROD, IN THE NORMAL REST STATE, PROJECTS OUT TO THE EXTERIOR OF A HOLLOW BODY 1 CONSTITUTING THE MAIN BODY OF THE PUMP. THE PUMP INCLUDES 20 CHINS OR SMALL TEETH BY MEANS OF WHICH THE CAP CAN BE LOCKED IN THE LOWERED POSITION ON THE HOLLOW BODY, AND ONE OR MORE TRIMS 5-8 COOPERATE WITH THE BODY TO COMPLETELY ISOLATE THE OUTER ATMOSPHERE OF THE INTERNAL RECIPE WHEN THE DISTRIBUTOR IS LOCKED IN THE LOWERED POSITION ON THE MAIN BODY OF THE PUMP.

Description

1 - Hand pump with distributor cap lockable in position

  lowered, for the distribution of fluids.

  The subject of the invention is a pump with a distributing cap

  locker in a lowered position, able to distribute

  fluids contained in a container.

  Many types of handpumps are known to be applicable to containers for liquids or creamy substances and which, when manually actuated, distribute the liquids in atomized or nebulized form and the substances

creamy under pressure.

  Pumps of this type are described, for example, in French Patent No. 2,097,353 and US Pat. Nos. 3,500,761, 3,774,849 and 4,228,931.

  essentially a hollow rigid body fixable on the mouthpiece

  of a container, a rod extending partially inside said body and provided with a floating seal, movable along the rod between two end positions in which it opens and respectively close one or several orifices of passage which communicate with a

  orifice passing longitudinally through the rod, on the end

  the outer body of the hollow body on which is mounted a distributor cap, at least one spring which cooperates with the rod to maintain it pushed outwards against 2 - a seal which is sealing on the rod itself to isolate the inside of the container with respect to the atmosphere, in the state where the rod is in the resting position, raised or

  pushing outwards by the spring, a passage allowing

  both to the outside air to penetrate inside the reci-

  as the rod is lowered away from the posi-

  mentioned rest period and also to finally prevent the

  formation of a depression inside the container,

  as the material of the container is dispensed.

  As indicated, in the normal state of rest of the

  pump, the rod on which the dispensing cap is mounted

  is kept pushed outward of the main body

  of the pump itself and, in that position, the

  container is insulated from the atmosphere: since the movable member or piston, or rather the rod

  of the pump, must make a relatively large displacement

  so as to be able to distribute a sufficient quantity of

  under pressure (it will be observed that the size of the pump is relatively small), it follows that, in the

  mentioned above, the stem and the cap

  scorer mounted on the stem protrude

  This represents a significant disadvantage because, under the conditions of storage

  and transport of the pump, it occupies, with its capu-

  distributor, a large volume.

  In the known pumps mentioned above, as soon as the rod is pressed towards the inside of the hollow body of the pump, this has the effect of releasing a passage through which the external atmosphere is placed in communication with the interior of the pump. container, to allow the entry of air into the container itself during the dispensing of the pressurized material, to prevent the formation in the container itself, a depression that would prevent

  the distribution of the material. It follows that if the

  container on which the pump is applied, is spilled

  As the rod is held in place within the hollow body, the material contained in the container can flow out of the container itself, through the

  passage mentioned above, which is nevertheless provided for

  It is therefore clear that the pumps of the known type do not allow the entry of air into the container.

  storage or transport, when they are applied

  on a container containing a substance to be dispensed, if they are not only in the position of rest mentioned above, in which the rod is pushed outwards by a spring and a seal,

  closes the passage between the inside and the outside of the

tainer.

  The main object of the invention is to provide a pump of

  mentioned above, which is equipped with locking devices

  cage of the cap, and with it, the rod, in the lowered position on the main hollow body of the pump, a sealing member being provided in this position and closing the communication passage between the interior of the container and the atmosphere . The hand pump according to the invention comprises a hollow body adapted to be mounted on the mouth of a container, a movable rod whose one end, which extends into the cavity of said body, carries a piston and the other end, projecting from said hollow body, supports a dispensing cap, said members cooperating with said hollow body and said rod to isolate the atmosphere inside

  of the container when the rod is kept pushed by a res-

  exits the resting position projecting from the hollow body and to cause the dispensing of the material when the pump is actuated with lowering of said rod and the

  hood on the hollow body, and a passage that brings together

  the inside of the container with the atmosphere, the-

  said passage being provided between said rod and the hollow body

  and open when the rod is moved away from the-

  said rest position, and is characterized in that it comprises means for locking said cap in substantially completely lowered position, with the rod retracted into the hollow body, and that there is provided a seal connected to the rod and the hollow body and a corresponding seat formed in the hollow body or respectively, -4-

  the rod or cap, said lining and said co-ordinated seat

  interfering with each other in order to seal

  wise when the cap is, with the rod, in said posi-

  substantially completely lowered.

  The invention will be better understood from the description

  below, relating to a preferred embodiment of the pump

according to the invention.

In the attached drawing

  Figures 1 and 3 show the pump sectional long

  and applied to the mouth of a container.

  in the idle state, with the distributor cap in the position of maximum distance relative to the hollow body of the valve and, respectively, with the cap in the locked position lowered as far as possible to the hollow body and, FIGS. and 4 are a side elevational view, partly in section, of the pump, in two different positions respectively corresponding to those of

Figure 1 and Figure 3.

  The main body of the pump shown in the drawing is well known per se and is simply schematized It comprises a hollow body 1 of the upper end of which is secured to a ferrule 2 lockable by engagement, as in the case of the figure or screw or bayonet, on the mouth 3

  container 4 which contains a liquid or

  to be distributed: between ferrule 2 and the free end

  the mouth 3 is provided with a seal 5.

  Inside the body cavity 1 extends the lower end of a hollow and mobile rod 6 which is pushed out by a spring 7 which acts on its end

lower.

  The rod is held in the normal rest position

  in Figure 1, by the spring 7 and in this position

  tion, it is applied to a seal 8 -5- itself applied against a retaining body 9 integral with the hollow body 1 At the lower part of the rod is mounted a movable seal 10 on which acts a spring 11 and which is movable between two positions, in one of which (shown in Figures 1 and 3) it closes

  openings which open into a longitudinal passage

  dull 12 of the stem and in the other of which it leaves

said free openings.

  At 14 free end of the rod 6 is mounted a cap

  tributor 13, through which passes a channel through which is effected the outward distribution of the material that is removed from the container 4 In the hollow body 1 is hollowed at least one orifice 14, while between the retaining body 9 and the rod 6 is provided, either in the form of a game, or by digging, a visible passage on the left of the rod in Figures 1 and 3 When the rod is

  lowered away from the position shown in the

  1 and consequently, as soon as the lining 8 moves away

  of the adjacent end of the holding body 9, the external air

  the container can penetrate inside the container through the mentioned passage and the orifice 14; thus can be avoided the formation of a depression inside the container and

  the material it contains can therefore flow freely

outwardly.

  The structure of the pump described so far is well known

  in itself and has been described summarily only to give

  an example of embodiment of the pump itself Pumps of this type are, for example, described in detail in the

  U.S. Patent Nos. 3,500,761, 3,774,849 and 4,228,931.

  The pump of the invention differs from known pumps by

  the fact that it includes organs, which, in the case

  particular, consist of a tooth 20 projecting towards the inside of the cap 13 and movable in a groove 21

  dug and extending longitudinally on the outer surface of

  At the two ends, upper and lower, of the groove 21, the groove 21 is profiled to form two notches or reentrant parts 23 -6-

  in which the tooth 20 can penetrate, by simple rota-

  the cap 13 on the body of the pump in FIG.

  the tooth 20 of the cap 13 is shown housed in the

  larger size 23: under these conditions, the cap 13 can not be lowered and, therefore, any inadvertent dispensing of the material contained in the container is prevented. Turning the cap to move the tooth

  in correspondence with the axis of the groove 21, the cap

  chon may be lowered to the shell 2 and, at the end of its stroke, it can again rotate to bring the tooth 20 in the notch 23 provided at the lower end of the groove 21 In this position, the cap is blocked near the ferrule 2 <figures 3 and 4); the pump, with its cap, occupies a volume much lower than that which it occupies in the normal state of rest represented in FIGS. 1 and 2 This is very important, because the ponpe

  can be stored and transported by occupying a certain volume

  that can reduced In the state of rest of Figure 1, even

  if the container on which the pump is applied is

  poured, with the cap 3 at the bottom, the liquid or the

  The creamy content contained in the container can not flow out through the passage provided between the rod 6 and the retaining body 9, because this is prevented by the seal 8 provided between the rod and said rod. body

  9, as clearly seen in Figure 1.

  To prevent the flow of liquid or material

  in the locked position of the cap in the lowered position.

  In FIGS. 3 and 4, an annular seal 30 (FIGS. 1 and 3) is mounted between the stem and the cap, while

  continuous tubular wall 31 which delimits a cylindrical surface

  drique on which the trim 30 is applied to make

  (Figure 3) when the cap is locked in position

  resting arrangement protrudes from the retaining body 12; under these conditions, the liquid that eventually flows through the orifice 14 and the passage between the rod and the body 9, will be blocked by cooperation of the lining 30 with the tubular wall 31 It is obvious that, instead of having the structure described, the lining could be integral with the fixed body of the pump and act on the profiled position and enlarged section of the rod or cap, or that the lining supported by the rod or the cap could be based on a conical surface secured to the fixed part of the pump, in which case the cap would be locked in the lowered position of Figures 3 and 4 It is also obvious that the teeth 20, instead of projecting towards the inside of the cap, could protrude outward and engage in a groove and notches cut into the inner surface of an outer tubular wall fixed to the cap; or, such teeth could protrude directly from the rod 6 and be movable in one or more grooves and, respectively, notches cut into the inner surface

  the cylindrical portion of the body 9 adjacent to the rod.

  In all cases, the extreme simplification of the structure of the pump is obvious; it can be transported lying down or upside down, and the liquid in the container can not escape, even if the pump is blocked

  in the position of Figures 3 and 4.

-8-

Claims (3)

Patent claims   1 Hand pump with distributor cap (13)   ble in the lowered position, for the distribution of fluid material, comprising a hollow body <1) adapted to be arranged on the mouth (3) of a container (4), a rod (6) movable whose end extends in the cavity of said body and   carries a piston and the other end, protruding from   firing said hollow body, supports said cap, means cooperating with said hollow body and said rod to isolate the outside atmosphere, the inside of the container when said rod is pushed by a spring (7) in the position of   rest protruding from the hollow body and for provoking   quer the distribution of the material when the pump is actuated by lowering said rod and said cap   on the hollow body and a passage (14) which communicates   the interior of the container with the external atmosphere provided between said rod and said hollow body and open   when the rod is moved away from said posi-   resting device, characterized in that it comprises means (20 21 23)   to block said cap in a substantially complete position   lowering, with said rod retracted into the hollow body, and that there is provided a seal <8) connected to the rod (6) or the hollow body (1) and a corresponding seat (9) formed by the hollow body or, respectively,   by the rod or cap, the packing and the cooperating seat   between them to seal the passage   when the cap and the rod occupy said sensory position completely lowered.   2 hand pump according to claim 1, characterized in that said gasket (8) is connected to the rod and said seat is constituted by the inner surface of a continuous tubular wall (9) integral with said body   hollow and extending inside the stem.   3 hand pump according to claims 1 and 2,   Characterized in that said means for locking the cap   in the lowered position comprise a cut (23) and,   respectively, a tooth (20) adapted to engage in said notch, the notch and the tooth being formed in said cap and respectively in said hollow body, or vice versa, or in the stem and, respectively, in a   tubular wall integral with the pump retaining body.