ES2321344T3 - PUMP WITH CLOSURE DEVICE FOR DISTRIBUTION OF FLUID SUBSTANCES. - Google Patents

Abstract

A closable dispensing pump (1) for fluid substances comprising a chamber (6) in which a piston (7) is slidable, drivable by a stem (2), said stem (2) presenting in its interior at least one first passage (3) communicating with said compression chamber (6) and a dispensing pushbutton (4) presenting a second passage (14) opening towards the outside of said dispensing pushbutton (4). The first passage (3) presents a first aperture (3a) which opens onto a first contacting surface (2b) of the stem (2), said second passage (14) presenting a second aperture (14c) which opens onto a second contacting surface (4a) of the pushbutton (4), said pushbutton (4) and said stem (2) being mutually rotatable about a longitudinal axis (A) between at least one open position in which said first (3a) and second (14c) aperture face each other and are in mutual communication, and a closed position in which they are mutually isolated and displaced.

Description

Pump with closing device for distribution of fluid substances.

The present invention relates to a pump with closing device for distribution of fluid substances that can be extracted from a container, according to the part introductory of the main claim. The invention is refers in particular to a distribution pump for creams or Similar.

Distribution pumps with device Closure are known. One of said pumps is described in the US 3,216,625. The pump in question has a stem integrated in a distribution button. The stem can move inside an end piece of the pump, being Attach the end piece to the pump body. The stem is equipped with a thread, with the corresponding female thread located in The extreme piece. When the pump must be closed, the push button to the limit, so that the stem thread is attaches to that of the extreme piece. Then the rod in the extreme piece. An additional compression in the button does not cause any further displacement of the stem, the pump being closed in its closed position, preventing distribution.

US 4,368,830 shows a pump with a rod on which a push button and of distribution. The stem can slide along a piece extreme, presenting the button an elastic tooth that, when Push the button until the end of your run, fit in a stirrup arranged on the end piece that acts as a stop for keep the button in this position. This prevents the button movement and the pump is closed.

The known technique has the disadvantage of that when the pump is in the closed position, the entire length of the distribution duct (that is, from the opening of distribution to the distribution valve) is still in contact with the outside Consequently, the product in the inside the duct, which is in contact with the atmosphere outside, it can dry and clog the duct.

In some cases, this obstruction of the duct It may cause the pump to block.

If the product to be distributed is basic alcoholic, it can evaporate completely, with a considerable  product waste.

In addition, the product inside the duct, By being in contact with the air, you can become contaminated and lose your properties.

US 4318498 discloses a pump of distribution according to the pre-characterizing part of the claim 1.

An objective of the present invention is, by consequently, to disclose a distribution pump with a closing device for substances that can be extracted from a container, whereby technical problems are resolved of the known technique and in which when the pump is closed it prevents the entire product inside the conduit of distribution comes into contact with the outside.

A further objective of the present invention is to publicize a pump with a closing device that reduces the risk of malfunction due to clogging of the distribution duct

Another objective of the present invention is that of publicize a pump through which waste is prevented of the product to distribute.

A further objective of the invention is to avoid that the entire product inside the distribution duct may be contaminated by the air in the atmosphere.

These and other objectives are achieved through a distribution pump with closing device, for fluid substances, which can be extracted from a container, carried out in accordance with the technical indications of the attached claims.

From the description of an embodiment Preferred, but not exclusive, pump with device closure for the distribution of fluid substances that can be extracted from a container, the characteristics and additional advantages of the invention, illustrated by way of example no limiting in the accompanying drawings, in which:

Figure 1 is a section of a pump according to the present invention, in open position;

Figure 2 is a section of the pump of the Figure 1, in closed position;

Figure 3 is a section along the line 3-3 of figure 1;

Figure 4 is a section along the line 4-4 of figure 1;

Figure 5 is a side view of a alternative embodiment of the pump of the present invention shown in its open position;

Figure 6 is a front view of Figure 5;

Figure 7 is a section along the line 8-8 of Figure 5;

Figure 8 is a section along the line 9-9 of Figure 6; Y

Figure 9 shows the same section as in the Figure 7, but with the pump in its closed position.

Referring to these figures, these show, indicated together by (1), a pump with a closing device for fluid substances that can be extracted from a container.

Known pumps comprise a body (5) in vessel shape, which defines an admission, which contains a chamber of compression (6) in which a known piston (7) driven by a rod (2) can slide by closing. The body in vessel shape has at least one intake hole (8) closed by at least a first valve (9) of a type known and communicated by means of a dip tube (10) with the inside of the container in which the pump (1) is mounted. The stem is hollow inside, communicating its cavity with the compression chamber (6) through at least one second valve (12), also of a known type.

The rod (2) is slidably mounted through an extreme piece (13) that closes said body (5) in glass shape More specifically, the rod (2) is guided by length of the end piece (13) by a cylindrical surface guide (13a) thereof. This surface has a projection (13b) that fits into a groove (2a) present on the surface outside of the stem to make the rod (2) and the piece extreme (13) be rigid to torsion. In this regard, the stem (2) can slide through the end piece (13) to actuate the piston (7), but cannot turn around the part extreme, said rotation being prevented by said projection (13a).

Mounted on the stem (2) there is a push button distribution (4) presenting a second step (14) to distribute the fluid substance and that has an outward opening of said distribution button.

Specifically, the stem (2) has a first flat surface (2b) with a circular contact section that collaborates through contact with a second surface of contact (4a) of said distribution button (4), which also it is flat and circular in section (and consequently complementary to the first). The first contact surface (2b) and the second contact surface (4a) collaborate frontally and rest against each other when the stem is inserted into the push button The cylindrical surface of the rod also has a notch (2c) that blocks the rod in a cylindrical hole (4b) arranged in the button; between the stem and said hole cylindrical (4b) there is slight interference.

Consequently, if a torque is applied to the button (4), it can rotate with respect to the rod (2) around a longitudinal axis (A) of the stem (2) that coincides with that of the button.

On the rod (2) a first step is arranged (3) presenting a first opening (3a) and connecting said first opening (3a) with the stem cavity (2). Step (3) is substantially an axial hole arranged in a position deviated from the shaft (A) of the rod, therefore the opening (3a) deviated from the latter.

The second step (14) presents a first part (14a) substantially linear, connected to a second part (14b) when the push button mounted on the rod has its axis substantially parallel to the axis (A) of the stem. This second part (14b) has an opening (14c) on the second surface (4a) of the button. The second opening (14c) is offset from the shaft (A) and when the button is in a first open position, the second opening (14c) is located opposite and is substantially coaxial with the first opening (3a) of the stem (2), so that these openings communicate and the fluid product can be distributed by pressing the button.

Advantageously, the first opening (3a) and The second opening (14c) has identical dimensions and shapes.

When the button is turned, for example, from 90º to a closed position as in figure 2, the first opening (3a) and the second opening (14c) are not located a facing each other but each of them is in contact and is located in front of the second contact surface (4a) and in front of the first contact surface (2a), respectively. Of this so, the first opening (3a) is closed so substantially airtight and the fluid product in the cavity of the stem and in the first step (3) is isolated from the atmosphere Exterior.

In the part coupled to the rod (2), the button distribution (4) has a cylindrical ring (20) that is integrated in the button (4) and from which they extend radially a pair of first stirrups (21a), (21b) aligned each.

The end piece has a couple of seconds cylindrical stirrups (22a), (22b) that are separated from each other by middle of a pair of slots (23a), (23b).

When the distribution button (4) is on its open position (figure 1), each of the first stirrups (21a), (21b) are aligned with one of the slots (23a), (23b). When the button (4) is pressed, each of the slots (23a), (23b) hosts the first relative stirrup (21a), (21b), allowing this way the button moves and distributes the product.

When the button is in its position of closure, each of the first stirrups (21a), (21b) is located in front of one of the second stirrups (22a), (22b) of the piece extreme, thus preventing the movement of the button.

In an advantageous manner, some are arranged conventional stops (not shown) in the second stirrups (22a), (22b) to collaborate with said first stirrups (21a), (21b) to limit the rotation of the button between its open position and its closing position

Figures 5 to 9 show an embodiment Preferred current pump. These figures show only one part of the rod and the push button, the pump can be connected to the stem of any kind. The stem (70) is inserted from watertight shape in a cavity (71) properly disposed in the distribution button (72), and is locked in your seat by a notch (73) of fast acting. The notch allows the button rotates around the shaft of the rod. The closure is provided by contact between the outer surface (70b) of the stem and the surface (71A) that defines the cavity. The upper part (70A) of the stem (70) is open on its part upper where a groove (74) is arranged laterally in U-shaped, facing an opening (74A) on the surface outer side of the stem and also on the upper edge of the stem (70). This slot (74) is functionally similar to the first step (3) of the previous embodiment. In particular, a slot of This type can be easily molded without the help of sliding in the plastic molds, since it is arranged in the part top of the piece. It should be noted that the top of the stem, although open, rests tightly against the push button (72).

The distribution button comprises a step (76) of fluid distribution functionally similar to the second step (14). This step (76) of fluid distribution is a hole which is open at (76A) directly on the side surface that defines the cavity in which the rod (70) is inserted.

This step can also be easily obtained. by molding, this time by means of a slide.

The operation of this embodiment is Totally similar to the previous one. In this regard, when the rod and push button are in open position, so that the opening (74A) of the stem groove is located opposite the opening of the passage (76) of the button (figures 5 to 7), the distribution it's possible. On the contrary, when these openings are not facing each other and the opening (74A) of the rod is located in front of the surface that defines the stem cavity, while the opening (76A) of the passage is facing the outer surface of the stem, the distribution is not possible (figure 8).

To facilitate alignment between the first and the second openings when the pump is in the open position, on the surface that defines the cavity of the button is arranged a recess (77) in the form of a circular arc, being arranged in the surface of the stem a nerve (78) that is inserted into said recess when the rod and the push button are coupled. When the pump is open, the nerve leans against a first stop limiting (figure 8, figure 9) defined by means of a wall of the recess, while when the limit cap is against the another wall of the cutout, the pump is closed (figure 7). This solution can also be applied in a totally similar to the embodiment described above.

Advantageously, only by means of a small rotation, the aforementioned embodiment allows create a great distance between the openings to get a more effective closure. In addition, as already indicated, the molding of the stem, which is made of plastic material like the push button, is extremely easy since no slide is required in the mold.

As in the previous embodiment and of a totally similar way, stirrups can be arranged between the extreme piece and the button to limit its movement when the Pump is in the closed position. They can also be arranged means between the end piece and the rod to make these Last be rigid to torsion.

Claims (14)

1. Pump (1) with closing device for the distribution of fluid substances that can be extracted from a container, comprising a vessel-shaped body (5) defining a chamber (6) into which a piston (7) can slide ), which can be operated by means of a rod (2), the body in the form of a vessel having at least one intake port (8), closed at least by means of a first valve (9), and adapted to communicate through an immersion tube with the inside of the container, said rod (2, 70) having inside it, at least, a first step (3, 74), which communicates through at least a second valve ( 12) with said chamber and being slidably mounted through an end piece (13) that closes said body (5) in the form of a vessel, and a distribution button (4, 72) that it presents, for the distribution of the fluid substance, a second step (14, 76) that opens outwards of said push button distribution (4), said rod (70) presenting a first contact surface (2b, 70B) that collaborates in such a way that it substantially closes and makes contact with a second contact surface (4a, 71A) of said distribution button, presenting said first step (3, 74) a first opening (3a, 74A) that opens towards said first contact surface (2b, 70B), said second step (14, 76) presenting a second opening (14c, 76A) which is opens towards said second contact surface (4a, 71A), characterized in that said push button and said rod can rotate with each other about the longitudinal axis (A) of said rod (2) between at least a first open position in which said first and second openings are facing each other and are in mutual communication, and a closed position in which they are mutually isolated and displaced. 2. Pump according to claim 1, characterized in that said first surface (2b) and said second surface (4a) are front surfaces of said push button and of said rod. 3. Pump according to claim 2, characterized in that said first opening is in a position offset from the axis (A) of said rod (2). Pump according to claim 2, characterized in that said second opening is disposed in a position offset from the axis (A) of said distribution button (4). 5. Pump according to claim 1, characterized in that said first passage (3) is an axial orifice arranged in a position offset from the longitudinal axis (A) of said rod (2). 6. Pump according to claim 1, characterized in that said first surface (70B) and said second surface (71A) are lateral surfaces of said push button (72) and of said rod (70). Pump according to claim 6, characterized in that said first passage (74) is a lateral groove disposed in the upper part of the rod, and is located in front of the upper edge of the rod and, with an opening (74A), in front of the lateral surface (70B) of the stem. 8. Pump according to claim 7, characterized in that said upper part of the rod is open. Pump according to claim 6, characterized in that said second passage (76) is a hole that is directly open on the lateral surface (71A) that defines the cavity that houses the rod. 10. Pump according to claim 1, characterized in that said rod (2, 70) and said end piece (13) are torsionally rigid. Pump according to claim 8, characterized in that said end piece (13) has, on a guide surface of the rod thereof, a projection (13b) that collaborates with a groove (2a) disposed in the rod. Pump according to claim 1, characterized in that said distribution button and said end piece each have at least one stirrup (21a, 21b, 22a, 22b) which, when the button is in its closed position , collaborate with each other to block the stroke of said button and therefore of the rod. 13. Pump according to claim 2, characterized in that the button has a pair of stirrups (21a, 21b) projecting radially from the body of the button, the end piece having a pair of cylindrical stirrups (22a, 22b), each being separated of them by a pair of slots (23a, 23b), each of which receives a stirrup (21a, 21b) of the button during the push button stroke when the button is in its open position. 14. Pump according to claim 1, characterized in that a recess (77) is arranged on the surface defining the cavity of the push-button, a rib (78) being arranged on the surface of the rod which is inserted into said recess when the rod and the button are connected to each other, said recess and said rib collaborating to facilitate alignment between the first and second openings when the pump is in the open position, and to limit the rotation between the button and the rod.