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Longitudinal applicator with articulated rodRelated Patent Categories: Coating Implements With Material Supply, Supply Container And Independent Applicator, Applicator Includes Container Closure Or Overlies Material, Applicator Movable Axially Relative To ClosureLongitudinal applicator with articulated rod description/claimsThe Patent Description & Claims data below is from USPTO Patent Application 20070025803, Longitudinal applicator with articulated rod. Brief Patent Description - Full Patent Description - Patent Application Claims
FIELD OF THE INVENTION [0001] The invention relates to the field of fluid product applicators for makeup or face or eye care and typically comprising a brush as the means of application of a product such as mascara. BACKGROUND [0002] Many cosmetic fluid product applicators having a brush are known, for example as described in European applications No. 8630772, No. 87301927, No. 92303851, No. 94304753, No. 94306189 and No. 99420221.0. [0003] Typically, these brushes comprise a metallic frame made of metallic wires twisted so as to fix the rows of bristles in place. [0004] These applicators are typically associated with a receptacle to form a dispenser, the dispenser typically including: [0005] the receptacle forming a body containing the fluid cosmetic product and typically provided with a threaded neck, [0006] the applicator forming a threaded cap closing off the neck, the cap being fixed to a means of application, typically a brush, that dips into the fluid cosmetic product when the dispenser is closed, a rod fixing the brush to the cap. [0007] Moreover, the neck is typically provided with a wiping ring to limit the quantity of cosmetic fluid drawn out by the brush each time the brush is withdrawn from the body. [0008] Mascara applicators comprising an articulated brush or rod are known, such as those described in patents US 4 165 755, US 5 328 282 and US 4 428 388. [0009] Problems occur with the known applicators. Firstly, applicators according to the state of the art that include a brush or an articulated rod as described in patents US 5 328 282 and US 4 428 388 may require a large number of parts and are usually complex and expensive to make due to the assembly of their different parts. [0010] Secondly, when the number of parts is limited, as in some applicator methods as described in patent US 4 165 755 in which the articulated rod forms a hinge with two arms, either the arms are difficult to assemble in order to form the hinge, or the hinge has an excessively large clearance and is then insufficiently stiff in the angular direction to enable normal use of the applicators. [0011] Furthermore in these patents, the articulated arms can form an angle ox that is almost arbitrary. [0012] There is a continuous need to renew marketed products and to provide new technical functions for these products in the field of cosmetic product application and packaging devices. SUMMARY [0013] The invention aims to obtain a simple applicator, inexpensive to manufacture, comprising a rod provided with a hinge and two articulated arms, which solves the problems discussed above. Since these applicators are used by one's self, the gestures necessary to manipulate such applicators only require a limited number of angular configurations. [0014] In accordance with aspects of the invention, the applicator of a cosmetic product, typically mascara, is designed to cooperate in the axial direction with a receptacle provided with a threaded neck containing the cosmetic product so as to form a dispenser of the cosmetic product. The applicator comprises: [0015] a) a manual gripping means typically forming a cap used to close off the neck, [0016] b) a means of application of the cosmetic product, typically a brush, and [0017] c) an axial rod fixing the manual gripping means or the cap to the application means, the axial rod being articulated in an axial plane, including an upper arm fixed at its upper end to the manual gripping means or the cap, and a lower arm fixed at its lower end to the application means, the upper arm cooperating at its lower end with the upper end of the lower arm forming a hinge with its axis radially perpendicular to the axial direction, by cooperation of a male element forming an axle at one end of the two arms, with a female element forming a hub at one end of the other arm so as to enable rotation of the arms, the lower arm possibly being rotated manually around a direction forming an angle .alpha. with the upper arm equal to zero or not equal to zero. [0018] The applicator is characterized in that: [0019] 1) the male element includes two lateral walls oriented in the axial direction and facing each other, with a recessed part between them with a radial width L.sub.R and a non-recessed part or a solid part forming the axle, [0020] 2) the female part includes a central wall oriented in the axial direction with a thickness less than the radial width L.sub.R such that the central wall can slide between the lateral walls, the central wall comprising two projections facing each other forming a central recess and a peripheral recess such that the female element forms an open hub that can be assembled to the male element forming the axle by click fitting, the facing projections typically having a resilient elasticity and thus being capable of being temporarily separated under stress, typically during the click fitting or the rotation, [0021] 3) the non-recessed or solid part forming the axle has an external section forming a complete or partial order N regular polygon and the central recess has a homothetic internal section forming the regular polygon, such that the angle ox may be equal to at least two discrete adjacent angular values .alpha..sub.0 and .alpha..sub.1, where .alpha..sub.0<.alpha..sub.1 such that |.alpha.1-.alpha.0| is equal to 360.degree./N, where N is an integer number typically varying between 3 and 12. 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