Fixed-spray dispensing device

Details Fixed-spray dispensing device Fixed-spray dispensing device

1999-01-25

2001-02-13

Shaver, Kevin (Department: 3754)

Dispensing

With discharge assistant

With material supply container and discharge assistant with...

C222S385000

Reexamination Certificate

active

06186371

ABSTRACT:

CROSS-REFERENCE TO RELATED APPLICATIONS
Not Applicable.
STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH OR DEVELOPMENT
Not Applicable.
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention concerns a dispensing device of fluid product with a liquid to pasty consistency contained in a container, said dispensing device dispensing fluid product in the form of a fixed spray.
2. Description of the Related Art
“Fixed spray” is understood to mean a jet of fluid product in sprayed form that is not displaced during actuating of the device. In fact, most of the dispensing devices are actuated by transfer displacement with a button incorporating the nozzle which is acted upon with a finger or an actuating device. The steadiness of the spray is therefore taken by comparison with the container. The fixed spray dispensing devices, which may or may not be a simple pump or with precompression or a measuring valve, can for example find usefulness in the applications connected with pharmacology in which the precision of the jet is important.
Fixed spray dispensing devices are already known from the prior art, for example from documents U.S. Pat. No. 4,218,198, FR-A-2015035, WO 93/03857 or U.S. Pat. No. 4,227,628. In these devices of the prior art, the actuating of the button makes a plunger descend into a chamber that is provided in the lower part of a valve device that communicates with a discharge channel. The complexity of this type of dispensing device is due to the steadiness of the spray; the escape of the fluid product outside the chamber being made through a dispensing channel independent of the button, while in the conventional pump in which the spray is not fixed, the discharge of the product outside the chamber is done usually through the hollow actuating rod which is used from discharge channel towards the push button mounted on the upper extremity of the actuating rod. Every structure of this type of device of the prior art is therefore concerned with the fact that the spray is fixed. The button, the exit valve chamber, as well as the discharge and dispensing channel are of a specific design and little known by comparison with a conventional dispensing device not producing a fixed spray. This structural complexity makes the device relatively costly.
BRIEF SUMMARY OF THE INVENTION
One goal of the present invention is to provide a fixed spray dispensing device for fluid product that may be less costly to manufacture. The invention is proposed to use conventional dispensing devices without fixed spray modified so that their spray is fixed.
To do this, the goal of the present invention is a dispensing device of fluid product contained in a container, said device including:
a pump or a valve of the conventional type including a fixed body in which an actuating rod is movable between a resting position and a dispensing position, said rod being hollow so that it forms a discharge channel providing fluid communication between at least one part of said fluid product and outlets formed on the rod,
characterized in that the device includes in addition:
a dispensing member secured on said body, said dispensing member presenting a fixed dispensing outlet and means of communication for providing fluid communication with said movable outlets with the fixed dispensing outlet at least in dispensing position, and
a push button mounted on the actuating rod so as to seal the discharge channel at its upper extremity.
In contrast to the devices of the prior art described above, the fluid product is expelled outside the chamber through the discharge channel incorporated in the movable actuating rod. While in the prior art one sought to avoid passing the fluid product through the button or the actuating rod because of their mobility, in the present invention, the fluid passes through the actuating rod allowing the use of conventional dispensing devices that do not produce a fixed spray. This stationary dispensing member allows the spray to be fixed due to fluid communication with the outlet means of the actuating rod.
The actuating rod could or could not be a valve rod with a valve or an actuating rod with a precompression pump. The valve or the pump is an absolutely conventional type and therefore relatively low in cost. Consequently, by simple adaptation of the dispensing member and the push button on the rod, a fixed spray dispensing device is obtained.
According to one form of execution, the communication means include an outlet chamber secured to the dispensing member in which one part of the rod comprising at least the outlet means is mounted so that it can slide in a leaktight manner, said chamber, at least in the dispensing position, causing the outlets of the rod communicate with the dispensing outlet.
Advantageously, the exit chamber surrounds the rod at a height s approximately equal to the height of defined movement between the resting position and the dispensing position of the rod.
In order to guarantee the leaktightness, the exit chamber is provided with two annular leaktight lips in leaktight sliding contact with the rod.
The fluid product discharged by the discharge channel through the outlet means arrives therefore in a chamber sufficiently high to allow it, by means of exit outlets to be at any moment in communication with this exit chamber at least on one part of the movement of the rod up to its dispensing position. In fact, the outlet means according to one form of execution can be at any moment in communication with the exit chamber all along the movement of the rod between the resting position and the dispensing position. In this case, the dispensing device should be provided with an exit valve. As a variation, the outlet means of the rod, can be isolated from the dispensing member in resting position.
In other words, the outlet means of the rod are situated outside the exit chamber in resting position. In this case, the obstruction of the outlet means in resting position acts as exit valve means. With little movement of the rod, the outlet means are therefore hidden. This variation of execution is particularly well adapted in the case where the rod is an actuating rod with a precompression pump, in which a small initial movement of the rod is used to pressurize the fluid product.
Other characteristics and advantages of the present invention will appear during the following detailed description of two forms of execution given by way of nonlimiting example compared with attached drawings.


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