Patent Application
20100236072
This invention relates to a manually actuable liquid dispensing razor.
This invention relates to the field of wet shaving which is the process where a razor with one or more sharpened blades is moved along skin to cut hair. When a consumer engages in the wet shaving experience, it is typical to apply a skin preparation, e.g., shaving soap, shaving cream, shaving gel, skin conditioning foam, etc., via a brush or manual application prior to movement of the razor along the skin's surface. Most consumers find this type of preparation to be rather inconvenient because of the need for multiple shaving products, e.g., a wet razor and a skin preparation product, as well as the undesirable necessity for multiple application steps during the wet shaving process. This multi-step process also results in an overall extended shaving experience which most consumers do not prefer given typical morning hygiene routines. It may, however, be desirable sometimes to apply fluids of other kinds to the skin before, during, or after shaving. It has been found that especially in the case of males who shave facial hair, it is important to provide a shave preparation of some sort prior to shaving in order to adequately hydrate the coarser facial hairs to allow for an easier and closer shave.
In the past, there have been a number of wet shaving product configurations that include a system for conveying a shaving preparation during shaving, e.g., a lubricating fluid, from a reservoir incorporated in the razor structure in the form of a hollowed out razor handle or even an aerosol can that acts as a razor handle, to a dispensing location near the head of the razor. A number of more recent wet razors have cartridges that are movably mounted, in particular pivotable, relative to the handle structures on which they are mounted either permanently, in the case of disposable safety razors intended to be discarded when the blade or blades have become dulled, or detachably to allow replacement of the blade unit on a reusable handle structure. An exemplary razor of this sort is disclosed in U.S. Pat. No. 6,789,321 or U.S. Pat. No. 7,127,817. Many of these types of razors that are capable of conveying a liquid to the skin surface are unfortunately plagued by a number of problems. For instance, the inner workings of the razors tend to be cost prohibitive from a large scale manufacturing standpoint. Additionally, there are safety and performance issues that are constantly experienced due to microbial growth with the reservoir due to the continued exposure of a portion of the remaining liquid to air. This exposure of the liquid to air may oftentimes result in clogging of the razor's inner workings by the liquid resulting in a nonperforming shaving product.
A need therefore exists to provide a razor that overcomes the aforementioned problems.
In an aspect, the invention features a wet shaving razor for dispensing a fluid during shaving. The razor comprises a razor cartridge that is engageable to a handle. The razor cartridge comprises a housing having a top portion, bottom portion, front surface, and rear surface; a cartridge connecting structure attached to the rear surface of the housing; at least one blade positioned between the top portion and the bottom portion; and an aperture located between the top portion and the bottom portion such that the aperture extends from the rear surface to the front surface. The handle comprises a length that extends from a proximal end to a distal end, a cavity for housing a fluid disposed within the handle, a manually-actuated pump located along the length of the handle, and a fluid dispensing member comprising a channel in fluid communication with the pump and having an opening at a terminal end. The fluid dispensing member projects outwardly from the proximal end of the handle such that the terminal end extends to or adjacent to the aperture in the housing. Upon actuation of the pump, fluid is displaced from the cavity through the aperture to or adjacent to the front surface of the housing.
In another aspect, the invention features a wet shaving razor for dispensing a fluid during shaving. In this implementation, the razor cartridge comprises a housing with a plurality of apertures located between the top portion and the bottom portion that extend from the rear surface to the front surface. Furthermore, the fluid dispensing member has a plurality of openings at a terminal end such that the fluid dispensing member projects outwardly from the proximal end of the handle and extends into the plurality of apertures to or adjacent to the front surface.
In yet another aspect, the invention features a method of dispensing fluid from a wet shaving razor during shaving. The method comprises providing a wet shaving razor, as described above, and actuating the pump thereby displacing the fluid from the cavity through the aperture to or adjacent to the front surface of the housing.
Certain implementations of the invention may include one or more of the following features. Typically, the fluid is stored in the cavity in a sachet, which can be replaceable or refillable. The fluid dispensing member may extend to or adjacent to the front surface of the housing allowing for direct contact to a user during shaving. The terminal end of the fluid dispensing member may engagably mate with the housing. In an embodiment, the channel includes at least two openings at the terminal end to provide for multiple dispensing points. To prevent the fluid from leaking, the opening comprises a check valve.
The razor cartridge may be replaceable or pivotally connected to the cartridge connecting structure. In an aspect, the cartridge connecting structure includes at least one arm to releasably engage the cartridge. Additionally, the razor cartridge may include a guard as well as an elastomeric member disposed on the guard.
The pump includes a wall, either movable or rigid, upon which force is acted upon to move the fluid through. In the case of a movable wall, the movable wall may be located on one or more of an upper or lower surface of the handle. For a rigid wall, the force causes the movement of non-rigid sidewalls of the pump to move a fluid through to the channel.
Other features and advantages of the invention will be apparent from the description and drawings, and from the claims.
The cartridge (200) attaches to the rear surface (210) of the housing (202) by a cartridge connecting structure (212). The cartridge connecting structure (212) may include one or more arms (332) that extend to provide pivotal support of the housing (202). Alternatively, the cartridge connecting structure (212) may include an ejection mechanism to disengage the housing (202) from the cartridge connecting structure (212).
In an embodiment, the razor cartridge (200) may also include a guard (218) or lubricating strip located between the top portion (204) and bottom portion (206). The guard (218) is useful for stretching the skin's surface immediately prior to engagement with the blade or a first blade (when more than one blade is present). This guard (218) may typically comprise an elastomeric member to allow for an engagement that is comfortable to a user. U.S. Pat. No. 7,168,173 discloses a suitable razor cartridge and elastomeric material. Other razor cartridges and/or elastomeric materials can be selected as desired. Typically, the elastomeric material used is a block copolymer (or other suitable materials), e.g., having a durometer between 28 and 60 Shore A.
The lubricating strip, on the other hand, provides an additional treatment to the skin after contact between the fluid and the skin has occurred. The lubricating strip may contain the same or additional skin ingredients to those that are present in the fluid. Suitable lubricating strips are disclosed in U.S. Pat. Nos. 7,069,658; 6,944,952; 6,594,904; 6,182,365; D424,745; U.S. Pat. Nos. 6,185,822; 6,298,558; and 5,113,585.
Referring to
The handle (300) includes a cavity (308) for housing a fluid (310) disposed within the handle (300), a manually-actuated pump (312) located along the length (L) of the handle (300), and a fluid dispensing member (314). The fluid dispensing member (314) has a channel (316) in fluid communication with the pump (312) and has an opening (318) at a terminal end (320). The fluid dispensing member (314) projects outwardly from the proximal end (304) of the handle (300) such that the terminal end (320) extends to or adjacent to the aperture (216) in the housing (202). Actuation of the pump (312) displaces the fluid (310) from the cavity (308) through the aperture (216) to or adjacent to the front surface (208) of the housing (202).
The manually-actuated pump (312) may include stacked (and substantially flat) components and particularly a movable wall that acts to activate the flow of fluid from the cavity through channel and to the opening. A pump suitable for use in the present invention is disclosed in U.S. Pat. No. 5,993,180. In particular, this well-suited pump includes a pump chamber bounded by the movable wall, an inlet channel and an outlet channel, both of which are connected to the pump chamber, an inlet valve for closing the inlet channel, and an outlet valve for closing the outlet channel. The movable wall of the pump may take a number of forms. For instance, one movable wall embodiment may comprise a rigid topside that moves in the z-direction in response to a force acted upon the rigid topside that in turn causes non-rigid side walls of the pump to compress to move a fluid through the razor. In another instance of the present invention, the movable wall may comprise a rigid central region surrounded by a flexible periphery such that the movable wall's tactile characteristics vary within the single plane of the topside. In this instance the side walls may be either rigid or flexible. In another embodiment, the topside surface of the wall may be flexible such that the mere application of force to the flexible topside results in a “movable” wall that gives in response to such force. In most instances, the pump may be actuated by the pressure exerted by a user's finger such that the user may easily determine the requisite amount of fluid for one or more shaving strokes. Because the valves of the pump are automatically opened when pressure is applied by the user's finger pressure, the fluid can be dispensed in controlled and metered quantities without relying on judgment or dexterity of the user. It is also possible to place one or more movable walls of the pump on an upper surface or lower surface of the razor depending on a user's preference.
The cavity (308), or at least a container/sachet (322) within the cavity (308), contains the fluid (310) to be dispensed during shaving. In an embodiment, the fluid (310) in the cavity or container is refillable or replaceable. The container may have multiple chambers that allows fluids to mix upon being dispensed. The fluid (310) may include shaving gels, shaving foams, shaving lotions, skin treatment compositions, conditioning aids, etc., all which may be used to prepare the skin's surface prior to the engagement of the blade with the skin or even after engagement of the blade with the skin. Additionally, such materials may comprise benefit agents suitable for skin and/or hair that may be useful for a number of different desirable effects including exfoliation, cooling effects, cleansing, moisturizing, warming or thermogenic effects, conditioning, and the like. Suitable benefit agents for skin and/or hair for inclusion into the fluid of the razor are disclosed in U.S. Pat. No. 6,789,321. For instance, suitable agents include but are not limited to shaving soaps, lubricants, skin conditioners, skin moisturizers, hair softeners, hair conditioners, fragrances, skin cleansers, bacterial or medical lotions, blood coagulants, anti-inflammatories, astringents, and combinations thereof. In certain embodiments, the fluid (310) may be contained in a sachet (322), either disposable or reusable, that is further contained within the cavity (308) of the handle (300).
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The dimensions and values disclosed herein are not to be understood as being strictly limited to the exact numerical values recited. Instead, unless otherwise specified, each such dimension is intended to mean both the recited value and a functionally equivalent range surrounding that value. For example, a dimension disclosed as “40 mm” is intended to mean “about 40 mm.”
Every document cited herein, including any cross referenced or related patent or application, is hereby incorporated herein by reference in its entirety unless expressly excluded or otherwise limited. The citation of any document is not an admission that it is prior art with respect to any invention disclosed or claimed herein or that it alone, or in any combination with any other reference or references, teaches, suggests or discloses any such invention. Further, to the extent that any meaning or definition of a term in this document conflicts with any meaning or definition of the same term in a document incorporated by reference, the meaning or definition assigned to that term in this document shall govern.
While particular embodiments of the present invention have been illustrated and described, it would be obvious to those skilled in the art that various other changes and modifications can be made without departing from the spirit and scope of the invention. It is therefore intended to cover in the appended claims all such changes and modifications that are within the scope of this invention.
