FR2513971A1 - DISPENSER FOR PRESSURIZED PRODUCTS, ESPECIALLY FOR PASTY TOILET PRODUCTS - Google Patents

Abstract

THIS DISPENSER OF TOILET PRODUCTS, FOR EXAMPLE OF THE TOOTHPASTE, INCLUDES A CONTAINER 12 HAVING A NECK IN WHICH IS SLIDING FITTED A PLUNGER TUBE 18. A SEMI-FLEXIBLE PLATE 40 FORMING PISTON WHICH IS MOVABLE ONLY DOWN THANKS TO THE PRESENCE OF THE BOTTOM A LIP 42, IS MOUNTED IN THE CONTAINER ABOVE THE PRODUCT. RATCHET TEETH 34 ARE SHAPED ON THE PLUNGER WHICH CROSSES PLATE 40 SO THAT, WHEN PRESSING ON THE PLUNGER, THE LATTER DRIVES THE PLATE DOWN TO COMPRESS THE PRODUCT FURTHER AND DELIVER IT OUT THROUGH THE TUBE WHICH IS EQUIPPED WITH A VALVE 48 WHICH OPENS ONLY WHEN A PRESET PRESSURE IS REACHED. A SPRING 28 RETURNS THE PLUNGER TO ITS INITIAL POSITION, THE PLUNGER, ON RETURN, SLIDING THROUGH THE PLATE HELD FIXED BY THE RATCHET TEETH 34 AND THE LIP 42.

Description

The present invention relates to a dispenser standing upright while

  alone for pressurized products, such as toothpaste,

shaving cream and the like.

  Distributors of this type are described

  in German patents Nos. 1,210,149 and 2,611,644.

  In the past, products under pressure

  were distributed using aerosol containers.

  In these types of containers, a propellant under high pressure is used to dispense the product. Such a device is described in the

U.S. Patent No. 3,992,003.

  A valve tap assembly for a dispenser is described in US Patent No. 3,097,766, this assembly requiring the use of a propellant

  previously introduced into the container.

  U.S. Patent No. 2,356,874 describes a container with a ratchet piston and with a

  drawer tap However, in this case,

  not wise to have permanent pressure in the re-

  container and a tap which opens only after application

  cation of additional pressure.

  In US Patent No. 3,255,935, fingers formed on a piston are engaged with a vertical actuating rod as well as with the interior wall of a container to allow movement

unidirectional piston.

  In the US patents N's 993 579 and 2.732 101, a piston is used to push the

contained in a central column.

  The prior art does not envisage packaging products maintained under a low

  pressure in a pump type distributor.

  Therefore, one of the objects of the present invention is to provide a dispenser of the type to

13971

  -2- stable pump that can stand on its own and in which products maintained under low pressure

  are packaged for distribution -

  The present invention relates to a pump type dispenser which can stand on its own for toiletries, such as shaving cream, toothpaste and the like, which are packaged in the container under low pressure. product is expelled under

  the action of additional pressure by the action-

  nement of a notched plunger cooperating with a semi-flexible plate serving as a piston to decrease the volume of the container and thus increase the pressure of the product which is already under pressure A valve is mounted in the plunger to discharge the product through the hollow center of the plunger, valve closing

the preset initial pressure.

  Other features and benefits of

  the invention will emerge from the description which goes

  follow, given by way of nonlimiting example and with reference to the appended drawing in which: FIG. 1 is an elevation view of the dispenser of the pump type according to the invention; Fig 2 is a vertical sectional view of the dispenser, and Fig 3 is a vertical sectional view of a

  variant embodiment of the invention -

  In the drawing, a dispenser 10 according to the invention of the pump type and able to stand on its own is produced from a container 12, preferably cylindrical, having a portion 14 in the form of a truncated cone which ends in a neck 16 in which a plunger 18 is slidably mounted without play The plunger has an outlet spout 20 and it is profiled on its top to provide a grip 3 - convenient 22 for the fingers in order to facilitate its insertion The container 12 is preferably provided with a base 24 with an enlarged base which ensures

  better stability qualities - of the container.

  A collar 26 is rigidly mounted on the plunger inside the container A helical spring 28 held under an initial tension

  is anchored to the collar 26 and to the region's

  upper part of the tapered portion 14 at a point

  designated by reference 30 to apply elasticity

  and continuously pull the plunger to a high position after pushing in and, below the collar 26, the plunger 18 is notched so as to form teeth

  34 ratchet having side surfaces 38 extend

  downward and outward and ending in shoulders 36 Around the notched part of the plunger 18 is mounted a semiflexible plate functioning as a piston and preferably made of a rubber-like material and having a lip flexible upper 42 which bears against the surface of the inner wall 44

of container 12.

  The plunger is hollow and its lower end is provided with an inlet opening 46 which is close to the bottom of the container after the plunger has been inserted. Inside the hollow plunger is mounted a one-way valve 48 which does not open only when the pressure exerted on the product exceeds the pressure under which the product was initially conditioned in the

container 12.

  -4- During operation, the depression of the plunger 18 has the effect that a shoulder 36 bears against the plate 40 to push it back

  downward, further compressing the Na- product

  turally, the first movement of the plunger down has the effect that the flange 26 comes to bear against the plate 40 to press it first until the successive shoulders 36 can come to bear against it The lip 42 is stretched against the side wall 44 of the container 12 and allows the downward movement of the plate 40 while also ensuring the seal avoiding that the product escapes, and strongly opposing the upward movement of the plate 40 The depression of the plunger 18 causes the plate 40 to move downward, further compressing the product and the

  pumping up through the inlet port 46.

  The increased pressure opens the valve 48, which allows the product to flow out of the spout 20 until the pressure at which the valve 48 is adjusted is reached, pressure which corresponds to the initial conditioning pressure. traction 28 then pulls the plunger up to the limit established by the stopper 32 However, the lip 42 retains the plate 40 in its lowered position The following actions of the shoulders 36

  during successive depressions of the displaced diver

  Then gradually tap the plate down until it practically reaches the bottom 24 of the container 12, at which time almost all of the

product will have been distributed.

  In Fig 3, a variant is shown

  of the invention which is very close to the mode of realization

  reading previously described and which functions in the same way In this embodiment, notches -5 - notches 60 whose effect is added to that of the notches formed on the plunger 18, are formed on the wall

  inside 44 of container 12 These notches are orientated

  tees in the same direction as the notches formed on the plunger 18 and they provide greater stability to the plate which ensures that, when the plunger 18 returns upward through the plate 40, the latter remains in its new position lowered. 6-

Claims (10)

  1 distributor for pressurized products, characterized in that it comprises a container (12> which contains a compressed product under a preset pressure, a hollow plunger (18) extending in said container, a piston (40) carried by the plunger to increase the pressure exerted on the product during the downward movement of the piston, and a valve (48) mounted in the plunger and which opens   under increased pressure, to allow listening   outwardly closing the product   -when said preset pressure is reached.   2 Dispenser, characterized in that it comprises a container (12) having a neck (16), this container containing a product compressed under a preset pressure, a hollow plunger (18) slidably mounted in the neck, the plunger having an orifice (46) product inlet at its lower end and an outlet spout (20) at its upper end, this plunger comprising teeth (34) on its outer surface, a piston (40) slidably mounted on the plunger and comprising a lip <42) designed to bear against the container to allow   the downward movement of the piston during   sinking of the plunger while preventing movement   up the piston when moving the plunger upward, the piston increasing the pressure exerted on the product to a value greater than the preset pressure when moving the plunger down, and a valve (48) mounted in the plunger, this valve opening under said increased pressure, to allow the flow of the product towards   outside, and closing when the pressure pre- set is reached.   -7- A dispenser according to claim 2, characterized in that it comprises elastic means (28) for continuously biasing the plunger (18)   towards an initial raised position.   4 A dispenser according to claim 3, characterized in that it comprises stop means   (32) to fix the highest position of the plunger (18).   Distributor according to claim 4, characterized in that the piston has a plate semi-flexible (40).   6 A dispenser according to claim 5, characterized in that the lip (42) has come from   material with the semi-flexible plate (40).   7 distributor according to claim 3, characterized in that the elastic means are   constituted by a tension spring (28).   8 A dispenser according to claim 2, characterized in that the upper end of the plunger is profiled to form an outlet (22) for fingers.   9 A dispenser according to claim 2, characterized in that the inner wall (44) of the container (12) is notched.   Distributor according to claim 2,   characterized in that it includes elastic means   ticks (28) to continuously request the -   plunger (18) to a raised position, the valve (48) allowing product to flow when the plunger is in the raised position as long as the   preset pressure is not reached.   11 A dispenser according to claim 10, characterized in that it comprises stop means (32) for determining the highest position of the plunger   <18), the piston comprising a semi-flexible plate (40).   -8- 12, Distributor according to claim 11, characterized in that the elastic means are   constituted by a tension spring (28).   13 A dispenser according to claim 1, characterized in that the upper end of the plunger (18) is profiled to form an outlet (22) for fingers.   14 A dispenser according to claim 13, characterized in that the inner wall (44) of the container is notched to stabilize the flexible plate.