Coating implements with material supply – Solid material for rubbing contact or support therefor – Including means to advance material
Patent
1995-06-16
1999-01-26
Bratlie, Steven A.
Coating implements with material supply
Solid material for rubbing contact or support therefor
Including means to advance material
74 8915, 74459, 222390, 222391, 401 75, 401172, 401175, 4119372, A45D 4006
Patent
active
058631429
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
The present invention relates in a general manner to a device for driving a part in translatory motion by the rotation of a rod or the like extending through the said part.
It relates more particularly to an apparatus for applying a more or less viscous fluid such for example as nail varnish fitted with this device.
BACKGROUND OF THE INVENTION
One knows that the hydraulic jacks consist in general of a rod which pushes a piston in a cylinder. But the bulkiness exhibited by such jacks is about twice the length of the rod thereby constituting an inconvenience when one must use them in an apparatus having necessarily to exhibit a very small bulkiness.
On the other hand one has already proposed systems in which an externally threaded rod extends through a piston held immovable against rotation so that the rotation of the rod permits the translatory motion of the piston along the said rod.
But such a system is not free of drawbacks, in particular in connection with the fluid-tightness between rod and piston, which fluid-tightness often is imperfect let apart the possible fouling of the system.
SUMMARY OF THE INVENTION
Therefore the present invention has as its object to remedy the above-identified drawbacks by proposing a structure driving device adapted to impart all the required fluid-tightness qualities to between rod and piston.
For that purpose and in a general manner the present invention has as its subject a device for driving a part in translatory motion by the rotation of a rod or the like extending through the said part which is held immovable against rotation, characterized in that the said part is provided with at least one blade the cutting edge of which is inclined with respect to the longitudinal axis of the rod and projects sidewise through the aperture of the part through which extends the rod in order to be caused to bite in the external smooth periphery of this rod so as to cut helically therein during its rotation and thus cause the translatory motion of the part along the rod during this rotation.
One therefore already understands that the blade constitutes a simple means to permit the translatory motion of the part under the effect of the rotation of the rod.
According to a first embodiment the blade is mounted in the part so that its plane is substantially perpendicular to the plane tangent to the external side surface of the rod, the said plane being parallel to the cutting edge of the blade.
According to another embodiment the blade is mounted in the part so that its plane is inclined with respect to the plane tangent to the external lateral surface of the rod, the said plane being parallel to the cutting edge of the blade.
One should specify here that in this case the plane of the blade preferably is inclined with respect to the aforesaid tangent plane towards the direction of advance of the aforesaid part.
According to a particular embodiment the cutting edge of the blade may be in the shape of a right-angled dihedron and may be constituted by one arris of an edge of a parallelepipedic plate.
According to still another characteristic of the invention, the inclination of the cutting edge of the blade with respect to the axis of the rod is such that the axial component of the force exerted upon the blade by the effect of the rotation of the rod is clearly greater than the tangential component of this force.
In another embodiment of the invention the blade consists of several blades mounted and arranged in the part so that their cutting edges are directed along a regular cylindrical helix or form one single blade the cutting edge of which follows a regular cylindrical helical line.
The aforesaid blades may be formed of the two mutually confronting legs of a substantially U-shaped deformable member the legs of which are insertable into two apertures, respectively, which are formed obliquely in the aforesaid part and which are axially offset and extend on either side of the axis of the said part.
According to another embodiment the aforesaid blades are cut out
REFERENCES:
patent: 1260139 (1918-03-01), Brown
patent: 1701663 (1929-02-01), Clark
patent: 2578608 (1951-12-01), Shull
patent: 3557655 (1971-01-01), Coe
patent: 3570361 (1971-03-01), Tinnerman
patent: 4019654 (1977-04-01), Van Manen
patent: 4505606 (1985-03-01), Lockwood
Foltete Daniel
Lhuisset Francois Noel
Normand Gerard
Bratlie Steven A.
LVMH Recherche
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