Patent Grant
9511926
The present invention is concerned with an actuator cap or sprayhead for a fluid container that allows the contents of the container to be sprayed without the cap having to be removed. The invention is of particular use in the field of home and personal care when it may be used as part of a hand held aerosol dispenser. A particular aspect of the invention is that the sprayhead enables the dispenser with which it is associated to be interchangeably converted between operable and inoperable states.
Sprays through actuator caps enabling conversion between operative and inoperative states, optionally for use with pressurised fluid containers, have been described in the prior art.
WO 2004/078635 (Seaquist) discloses an actuator for an aerosol valve comprising an actuator button rotatable between a locked position and unlocked positions.
EP 1,040,055 B1 (Unilever) discloses a sprayhead comprising an over-cap rotatable between a first position in which actuation is possible and a second position in which actuation is not possible.
U.S. Pat. No. 4,542,837 (Metal Box) discloses an actuator having upper and lower rotatable parts which may be rotated between operative and inoperative positions.
EP 2,049,415 B1 (Valois) discloses a fluid dispensing head comprising actuator means for driving a pushbutton in axial displacement relative to the valve rod, the pushbutton being used to trigger dispensing.
WO 07/120570 (Precision Valve) discloses a locking aerosol dispenser with a dome attached to a base lock member and also attached to an aerosol valve mounting cup of an aerosol can.
It as an object of the present invention to provide a robust, yet ergonomically attractive dispensing means for spraying fluid products, particularly products intended for application to the surface of the human body.
The invention is particularly suitable for applying cosmetic products to the surface of the human body, especially to the underarm regions of the human body.
In a first aspect of the present invention, there is provided: a sprayhead suitable for use with an aerosol container comprising a central valve stem, said sprayhead comprising:
In a second aspect of the present invention, there is provided a method for applying a cosmetic composition to the surface of the human body comprising the use of a sprayhead according to the first aspect of the invention.
The sprayhead of the present invention is designed for use with a supply of fluid product, particularly fluid cosmetic composition for use on the surface of the human body. The fluid product is supplied from a container to which the sprayhead is attached.
The sprayhead is particularly suitable for use with a pressurised aerosol canister containing the product to be dispensed.
A key feature of the invention is that the sprayhead may be easily interchanged between a first position in which it is inoperable and a second position in which it is operable; that is to say, between a first position in which the spray channel may not be depressed and a second position in which the spray channel may be depressed. This change is brought about not by means of a component that the operator uses to actuate the sprayhead, but by means of a rotatable collar that the operator manually turns to interchange the device between inoperable and operable states.
In certain minor variants of the sprayhead disclosed herein, rotation of the rotatable collar leads to undesired rotation of the chassis holding the spray channel and associated actuator button. This leads to the problem that rotation of the collar relative to the chassis, spray channel, and associated actuator button does not occur to the extent desired. This in turn means that the sprayhead cannot be easily changed between its operable in inoperable states.
In order to address this problem, the present inventors devised a way of achieving a binding of the chassis to the valve cup which is significantly rotationally stronger than the binding between the rotatable collar and the chassis, without compromising the full functioning and robustness of the sprayhead.
Benefits of the present invention include the ability to transform the sprayhead between operable and inoperable states by a simple twisting of an easily gripped and rotated collar. In addition, rotation of the spray channel itself is not required and does not occur, protecting this sometimes delicate component from damage.
When in the inoperable state, the spray channel is prevented from depression by interaction of a feature on the spray channel with a feature on a bridge spanning a diameter of the collar. This mechanism necessitates the inclusion of a bridge spanning a diameter of the collar and the location of this bridge is critical to the present invention.
WO 07/120570 (Precision Valve) discloses a sprayhead with a rotatable collar that serves to transform the sprayhead between operable and inoperable states. The sprayhead disclosed therein also has bridge spanning a diameter of the rotatable collar and the means for preventing depression of the spray channel is associated with this bridge element.
In both the sprayhead of the present invention and that disclosed in WO 07/120570, the actuator button is located above the ‘locking’ ring, something that is ergonomically desirable. A significant difference between the two is that in the sprayhead according to the present invention, the bridge spanning a diameter of the rotatable collar sits above an upper surface of a chassis which is relatively firmly attached to the valve cup of an associated aerosol container.
The feature of having the bridge spanning a diameter of the rotatable collar sitting above an upper surface of a chassis enables improved grip of the chassis onto the valve cup by means of an annular skirt that is able to make extensive contact with the circumference of the valve cup. The annular skirt depends downwards from the main element of the chassis. The skirt encircles at least 90% of the circumference of the valve cup and grips it such that the chassis is relatively difficult to rotate relative thereto. In preferred embodiments, the annular skirt encircles and grips at least 95% of the circumference of the valve cup and in more preferred embodiments, the annular skirt completely encircles the circumference of the valve cup and grips the valve cup at all points around its circumference.
The torque required to turn the chassis around the valve cup is at least twice that required to the rotatable collar around the chassis. In many embodiments, the rotatable collar has features which provide resistance to rotation (vide infra). When such features are present, it should be understood that the torque required to turn the chassis around the valve cup is still at least twice that required to the rotatable collar around the chassis.
The torque required to turn the chassis around the valve cup is measured where the torque is at its least, should there be any angular variation in this amount.
The torque required to the rotatable collar around the chassis is measured where the torque is at its greatest, should there be any angular variation in this amount.
In preferred embodiments, the torque required to turn the chassis around the valve cup is at least three times that required to the rotatable collar around the chassis and in more preferred embodiments torque required to turn the chassis around the valve cup is at least five times that required to turn the rotatable collar around the chassis.
The torque required to turn the chassis around the valve cup is typically at least 50 N·cm. This torque can be as high as 200 N·cm in some embodiments.
The torque required turn the rotatable collar around the chassis is typically from 0 to 30 N·cm. In preferred embodiments, there is a feature providing resistance to rotation of the rotatable collar and the torque then required for rotation is typically from 5 to 30 N·cm and more typically from 15 to 30 N·cm.
A further benefit of the present invention is that the spray channel, typically the most fragile element of spray through caps, is always robustly held and enclosed by the chassis and upper body respectively. In addition, the spray channel does not need to move in preparation for actuation.
In preferred embodiments, the spray channel, which is connectable to a central valve stem of an aerosol container with which the sprayhead is designed to be used, passes through both a central aperture in a circular platform of the chassis and a central aperture in the bridge spanning a diameter of the collar. This double central holding of spray channel avoids any “in use” lateral pressure upon the valve of the aerosol container with which the sprayhead is designed to be used. Most importantly, this mechanical interaction between these three essential components of the sprayhead and the valve stem of the associated aerosol container gives great “in use” robustness and strength.
Herein, orientation terms such as “top” and “bottom”, “upper” and “lower” should be understood to refer to the sprayhead in the position it would occupy in normal use sat on the top of a vertically orientated aerosol can with which it is designed to be used, as illustrated in
When the outlet of the spray channel has a radially disposed outlet, the “front” of the sprayhead should be understood to be in the same radial direction as said outlet. By analogy, the “rear” of the sprayhead should be understood to be the opposite radial direction. “Sides” of the sprayhead should be understood to be “faces” radially orthogonal to the front-to-rear axis.
Herein, the term “central” is used with reference to a plane orthogonal to the top-to-bottom “long” axis of a vertically orientated aerosol can with which the sprayhead is designed to be used. It should also be understood to refer to this plane of the sprayhead as whole, rather than any particular component thereof.
Herein, the term “principle axis” should be understood to be the top-to-bottom “long” axis of a vertically orientated aerosol can with which the sprayhead is designed to be used and the top-to-bottom axis of the sprayhead itself.
The bridge spanning a diameter of the collar does not need to be a single element and nor does it need to link directly to the extreme radial edges of the collar. In preferred embodiments, the bridge spans the collar at the upper end thereof. It is further preferred that the bridge abuts a section protruding from the top of the circular platform of the chassis, said protruding section limiting the rotational movement of the collar because of its interaction with bridge thereof. Nevertheless, it is essential that the collar retains ability to rotate between a first position in which the sprayhead is inoperable and the bridge preferably abuts a first edge of a section protruding from the top of the circular platform of the chassis and a second position in which the sprayhead is operable and the bridge preferably abuts a second edge of a section protruding from the top of the circular platform of the chassis.
In preferred embodiments, the sprayhead comprises a fourth essential component: an upper body designed to fit over the chassis and spray channel, the upper body defining a first aperture, optionally covered by a flexible membrane, located over the actuator button associated with the spray channel and a second aperture surrounding an outlet from the spray channel such as to allow passage of a product from the spray channel to the exterior.
In preferred embodiments, the spray channel comprises an upright central segment, connectable at its lower end to a valve stem of an associated aerosol can and connecting at its upper end to a segment projecting radially outward from the central segment. In such embodiments, the central segment is in fluid connection with the segment projecting radially outward therefrom and also with the valve stem, when connected thereto. The segment of the spray channel projecting radially outwards does not need to be in the plane orthogonal to the principle axis of the sprayhead, but it does need to have a component of its projection in said plane.
The components of the sprayhead are typically made from plastic. The chassis may be made from polypropylene, as may the spray channel and the upper body, when present. When the upper body has a flexible membrane covering a first aperture located over the actuator button associated with the spray channel, this is typically made from a thermoplastic elastomer.
The features described with reference to the following specific embodiment may be considered preferred features of the generic description given above and/or may be incorporated independently into the subject matter as described the following claims.
Protruding upwards from the circular platform (12) are two sections (15) which are diagonally opposed on either side of the central aperture (13). Between these two protruding sections (15), a bridge (16) of the rotatable collar (4) sits on the upper surface of the circular platform (12) when the sprayhead is fully assembled (vide infra). The inner surface (15A) of each of these protruding sections (15) has the shape of the internal surface of a tube having its central axis as the principle axis of the sprayhead (1) and each having the same radius of curvature. Each inner surface (15A) bears a guide slot (17) between each of two internal projections (18) from said inner surface (15A). The guide slots (17) are diagonally opposed on either side of the central aperture (13) and are designed to accommodate wing elements (19) projecting from a central upright segment (20) of a spray channel (8) (vide infra). The interaction between the guide slots (17) in the chassis (3) and wing elements (19) of the spray channel (8) serves to restrict rotational movement of the spray channel (8) relative to the chassis (3).
The outer surface (15B) of each of the protruding sections (15) is an extension of the circular wall (12A) at the edge of the circular platform (12).
Each of these projections (22A, 22B, and 22C) has a bead (23) on its outer surface close to its upper end designed to interact with the rotatable collar (4) and restrict axial movement between the chassis (3), the rotatable collar (4) and the upper body (42) (vide infra).
The peripheral projections (22A, 22B, and 22C) are connected to the circular platform (12) by link walls (24) running from their radial ends to the circular wall (12A) depending from the circular platform (12). For the two peripheral projections (22B and 22C) that radially overlap the protruding sections (15), the link walls (24) also link to the outer surface (15B) of the protruding section (15). These two peripheral projections (22B and 22C) each have an arcuate platform (22D) running part way from their inner surface towards the outer surface (15B) of the protruding section (15). These arcuate platforms (22D) form the top surface of each peripheral projection (22B or 22C) of which they are a part, other than a short wall (22E) extending upwards at the outer edge of the peripheral projections (22B and 22C). The short walls (22E) each bear one of the aforementioned beads (23) on their outer surface and each have struts (22F) on their inner surfaces. Similar, but longer struts (22G) exist on the inner surface on a wall (22H) extending upwards at the outer edge of the peripheral projection (22A) that does not radially overlap the protruding sections (15).
The internal skirt (24) has an annular valve cup securing bead (26) around its inner surface close to its lower end, shown as lower internal surface 26A, designed to hold the chassis firmly to the valve cup of an aerosol can with which the sprayhead (1) is designed to be used.
Suspended from the circular disc (31) by diagonally opposed linkages (31A) there is a bridge (16), spanning a diameter of the circular disc (31). The linkages (31A) hold the main body of the bridge (16) at a height approximately level with the top of the outer wall (28).
The bridge (16) comprises an annular ring (32) at its centre, through which a central upright segment (20) of a spray channel (8) is designed to fit (vide infra).
The bridge (16) is designed to sit on the circular platform (12) of the chassis (3) and to be rotatable thereon between the confines imposed by the sections (15) protruding from the circular platform (12). Protruding from the upper surface of the bridge (16) and bordering the annular ring (32) thereof are two truncated wedge elements (33).
The spray channel (8) illustrated in
The radial segment (34) is in fluid communication with the central upright segment (20) which is itself in fluid communication with a valve stem of an associated aerosol can (2) (not shown) via a valve stem socket (36) when the sprayhead (1) is in use.
The central upright segment (20) has wing elements (19) projecting radially outwards from its sidewall in opposite directions orthogonal to the radial direction of the radial segment (34) of the spray channel (8). These wing elements (19) are designed to fit within the guide slots (17) on either side of the central aperture (13) of the chassis (3). (vide supra). The wing elements (19) do extend outwards from the lower region of the central upright segment (20).
The central upright segment (20) also has fore and aft projections (37 and 38, respectively) from its sidewall. The fore projection (37) has the same radial direction as the radial segment (34) of the spray channel (8) and the aft projection (38) projects outwards in the opposite radial direction. The fore projection (37) has a T-shaped cross-section at its lower end. The fore and aft projections (37 and 38, respectively) do extend outwards from the lower region of the central upright segment (20), both terminating at same axial height at which the wing elements (19) orthogonal to them terminate.
At their upper ends, the wing elements (19) project out distinctly further, to give what might be called upper wing extensions (19A).
Associated with the spray channel (8) at its top end is an actuator button (39) which curves downwards towards the rear and has a vaulted shape when viewed from above. On the underside of the actuator button (39) there are several strengthening struts, only two of which (40 and 41) are illustrated.
Sat over all the other components of the sprayhead (1), there is an upper body (42) as illustrated in
The upper body (42) also defines two side apertures (45 and 46) which afford the consumer a view of internal features of the sprayhead (1).
The first aperture (43) is covered by a flexible membrane (47) which has ridges (47A) on its upper surface and is typically made of a thermoplastic elastomer.
The upper body (42) has a peripheral skirt (48) of circular cross-section. This skirt (48) overlaps the three arcuate peripheral projections (22A, 22B, and 22C) which upwardly extend the peripheral skirt (15) of the chassis (3). The peripheral skirt (48) of the upper body (42) has three inward projecting ridges (49) equally spaced around its lower inner edge. One of these ridges (49) is illustrated in
The lower edges of the inward projecting ridges (49) sit on the upper edge of the knurled outer wall (28) of the collar (4), but do not restrict rotation thereof.
Other features of the upper body (42) that can be seen in
Another feature that aids the good rotational alignment between the upper body (42) and spray channel (8) is a downward projecting peripheral wall (52) around the edge of the first aperture (43) in the upper body (42) and the fact that the actuator button (39) has the same shape as said first aperture (43).
The underside of upper body (42) also comprising three sets of two struts (53), some of which are illustrated in
Actuation of the sprayhead (1) and release of the contents of its associated aerosol can (2) is achieved by depression of the spray channel (8) by application of pressure on the associated actuator button (39). This can only be accomplished when the collar (3) is rotated such that the truncated wedge elements (33) protruding from the upper surface of the bridge (16) are not abutting the underside of the fore and aft projections (37 and 38, respectively) from the sidewall of the central upright segment (20) of the spray channel (8). In this position, the central upright segment (20) of the spray channel (8) is able to be pressed down through the central aperture (13) in the chassis (3) and through the annular ring (32) in the centre of the bridge (16) spanning the collar (4), to apply pressure on the valve stem of an associated aerosol can and thereby release the contents thereof through the spray channel (8).
Depression of the spray channel (8), when the collar is rotated as described in the paragraph immediately above, is limited by the bottoms of the fore and aft projections (37 and 38, respectively) and by the bottoms of the wing elements (19) all abutting the top surface of the annular ring (32) in the centre bridge (13) spanning the collar (4). This feature further protects the valve stem of the associated aerosol can. The fore and aft projections (37 and 38, respectively) and the wing elements (19) all extend to the same depth down the central upright segment (20) of the spray channel (8) to assist this.
When pressure is removed from the actuator button (39), a spring in the valve stem of the associated aerosol can forces the spray channel (8) to rise to its original position and the collar (3) may be rotated back to the position in which depression of the spray channel is prevented by the protrusions (33) from the upper surface of the bridge (16) abutting the underside of the fore and aft projections (37 and 38, respectively) from the central upright segment (20) of the spray channel (8).
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| WO2013/092229 | 6/27/2013 | WO | A |
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| 20140361049 A1 | Dec 2014 | US |
