Coating implements with material supply – Including means to apply material-moving force – Piston-provided reservoir
Patent
1993-02-18
1994-12-13
Bratlie, Steven A.
Coating implements with material supply
Including means to apply material-moving force
Piston-provided reservoir
401 61, 401 66, 401179, 401181, 401269, 401288, A46B 1102
Patent
active
053724445
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
The present invention has essentially as its subject an improved applicator device for more or less viscous liquid products such for example as nail varnish.
One already knows for example from the documents FR-A-2,606,675 and FR-A-2,622,128 liquid applicators essentially comprising a container with a piston actuatable by the rotation of a rod itself operated by a button at one of the ends of the apparatus so as to cause the expulsion of the liquid contained in the container towards an applicator element which generally assumes the shape of a small brush.
However, the capacity of the tank of such applicator devices remains relatively limited in view of the fact that the mechanism for operating the expulsion of the liquid occupies a great portion of the length of the apparatus. In other words, taking into account the fact that the apparatus should have a limited length to lend itself to a convenient manipulation, the piston operating mechanism should necessarily occupy a great part of this length to the detriment of the capacity of the container.
SUMMARY OF THE INVENTION
Therefore, to remedy in particular the inconvenience hereabove, the present invention proposes an applicator apparatus the mechanical concept of which is such that the mechanism for the control of the delivery of the liquid to the applicator brush is remarkably compact. The delivery mechanism a length reduced to a minimum and occupies only a small length of the body of the apparatus to which consequently may be connected a tank of a relatively large capacity and permits to deliver with reliability an even very viscous liquid to the applicator brush as for example a liquid the viscosity of which amounts to several tenths of thousands of centipoises.
For that purpose, the invention has as its subject an applicator device for viscous liquid products such as nail varnish for example and of the type comprising a container with a piston actuatable by the rotation of a rod to cause the expulsion of the liquid contained in the container towards an applicator element such as a brush for example. In the present invention, the rod is hollow, carries the applicator element at one of its ends and plunges with its other end into the container after passage through the piston with which it co-operates through the medium of a threading in order that the rotation without any axial displacement of the hollow rod causes the axial displacement without rotation of the piston in the container.
According to an embodiment of the present invention, the rotation of the aforesaid hollow rod is ensured by a ratchet wheel controlled by a lateral push-button.
One therefore already understands that the insertion of one portion of the piston operating rod into the container and the provision of a lateral push-button are substantially minimizing the length of the control mechanism and such an advantage may be turned to account to increase the capacity of the container.
According to another characteristic of this device, the lateral push-button comprises two substantially parallel arms slidably mounted through the body of the apparatus and extending along a direction orthogonal to the axis of the ratchet wheel to co-operate with the teeth of this wheel through meshing and escapement along substantially one diameter of the wheel.
According to an exemplifying embodiment, the ratchet wheel is coaxially made fast to the hollow rod which is mounted in freely slidable and rotating relationship in a part slidably but non-rotatably mounted in the body of the apparatus and capable of being actuated by a closure cap of the apparatus. One should further specify here that the end of the part opposite to that adapted to co-operate with the cap is provided with at least one stop for blocking the push-button and/or the ratchet wheel when the apparatus is shut off by the cap.
According to another embodiment, the ratchet wheel is axially made fast to a part mounted in freely slidable and rotating relationship in the body of the apparatus and capable of being a
REFERENCES:
patent: 2505438 (1950-04-01), Stoller
patent: 3655290 (1972-04-01), Griffith
patent: 4071300 (1978-01-01), Nichols et al.
patent: 5033652 (1991-07-01), Kay et al.
Bratlie Steven A.
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