Cutlery – Cutting tools – Plural cooperating blades
Reexamination Certificate
2000-12-14
2004-02-03
Ashley, Boyer (Department: 3724)
Cutlery
Cutting tools
Plural cooperating blades
C030S527000, C030S210000, C030S034100, C030S133000, C030S201000
Reexamination Certificate
active
06684511
ABSTRACT:
BACKGROUND OF THE INVENTION
The present invention relates to devices for clipping hair, and more specifically to hair clipping devices designed for use in trimming facial hair such as moustaches, beards and sideburns, as well as touch up trimming or general trimming of hair anywhere on one's head or body.
A common problem to both individuals sporting facial hair such as moustaches, beards and sideburns, and professional hair stylists having such individuals as customers, is the collection of hair clippings generated in grooming and trimming such facial hair, and/or trimming of other stray hairs on or around the neck, ears, eyes or other light duty general hair trimming. Whether the trimming is accomplished with a powered trimmer or clippers, or with an ordinary scissors, the typically relatively short hair clippings have the tendency to spread over a wide area of a counter, sink or table adjacent the mirror used to facilitate the trimming, as well as upon the individual being trimmed. Clippings on one's clothing are especially unsightly. It has been found that the resulting mess from such trimming is worse when an electric trimmer is used, since the reciprocating blades have the tendency to throw the clippings over a wider area.
In an approach to solving the problem which is designed particularly for hair stylists, an electric hair clipper has been provided in which a vacuum hose is connectable to an outlet on the clipper body. This apparatus is somewhat cumbersome, requires a separate vacuum unit and is not well suited to home use.
Another attempt to address the problem of collecting hair trimmings is commonly-assigned U.S. Pat. No. 5,075,971, which discloses a cordless trimmer for delicate hairs such as those growing in or around the nose, ears and/or eyes. Since this device is compact, relatively low powered and designed for precise cutting of delicate areas, there is a perceived need for a unit with greater power and cutting capacity. Also, both cordless and AC-powered units are desired. An increase in power will generate additional clippings, and as such a more effective vacuum system is needed.
Another concern of individuals with facial hair is the ability to precisely trim around the nose, lips and ears with the same device as is used for performing the “gross” trimming. In response, some conventional electric clippers or shavers offer auxiliary pop-up trimming blades which are supplemental to the main cutting blades. However, one disadvantage of these supplemental trimming blades is that they are placed in close proximity to the main blades, and in some cases both sets of blades may cut hair, while only one set is so intended. The result is an uneven trimming job and a frustrated user. In some cases, the unintended set of blades may pull the hair or skin of the user. Further, the close proximity of the main and auxiliary blades in some cases obscures the visibility of the area to be trimmed.
Accordingly, a first object of the present invention is to provide an improved hair clipping device with accessible and visible blades for performing both gross and fine trimming.
Another object of the present invention is to provide an improved hair clipping device with an internal vacuum for easily collecting hair, and with blades for performing both gross and fine trimming wherein the device is configured so that the vacuum is effective in collecting clippings regardless of whether gross or fine trimming is performed.
Yet another object of the present invention is to provide an improved hair clipping device with blades for performing both gross and fine trimming, wherein the type of trimming can be selected while the user retains the same hand position, and wherein the cutting location is easily viewed.
Still another object of the present invention is to provide an improved hair clipping device which features a rotatable bladeset which provides a choice between fine and gross trimming, and also featuring a locking assembly to releasably secure the chassis in the selected position.
A further object of the present invention is to provide an improved hair clipping device which features a rotatable bladeset which provides a choice between fine and gross trimming, wherein when one such type of trimming is selected, the non-selected blades are kept out of the way to minimize interference with cutting or snagging by the selected blades.
A still further object of the present invention is to provide an improved hair clipping device which features a rotatable bladeset which provides a choice between fine and gross trimming, and a comb assembly, with a locking mechanism configured so that both the bladeset and the comb assembly may be released with a single button.
BRIEF SUMMARY OF THE INVENTION
The above-listed objects are met or exceeded by the present hair clipping device with rotating wide and narrow bladeset which provides both gross and fine trimming capabilities. Once the user selects a type of trimming to be performed, the non-selected blades are sufficiently isolated from the desired cutting location to prevent their obstruction or interference with the main cutting action. Another feature of the present clipping device is an internal vacuum system. In a preferred embodiment, the vacuum system is powered by the same motor which powers the clipper blades. Clippings are collected within the housing and can easily be removed for disposal. Both wide and narrow blades are provided on a pivotable chassis which is driven by a single drive member. Whichever blade is selected is disposed close enough to the vacuum intake so that clippings are collected. The selected size blade is releasably locked in place, and the comb assembly is also secured to a clipper housing. When the narrow blade is selected, it may project farther over the intake for greater accessibility to the delicate areas to be trimmed, and greater visibility of those areas. When a comb is provided, a single button releases the engagement of the comb and the position of the rotating bladeset relative to the housing.
More specifically, the present invention provides a hair clipping device including a housing, a bladeset engageable upon the housing and including at least one stationary blade and at least one moving blade configured for reciprocal movement relative to the stationary blade. The stationary blade has a first cutting edge and a second cutting edge, the at least one moving blade including a first moving edge configured for reciprocal movement relative to the first cutting edge, and a second moving edge configured for reciprocal movement relative to the second cutting edge. The housing defines a cutting location for the blades and the bladeset is rotatably engageable on the housing between a first position in which the first edges are employed, and a second position in which the second edges are employed.
In another embodiment, a hair clipping device is provided, including a housing enclosing an apparatus for creating a vacuum, and having a vacuum intake. A blade chassis is also provided and is engageable upon the housing, and has a bladeset including at least one stationary blade and at least one moving blade configured for reciprocal movement relative to the stationary blade. The stationary blade has a first cutting edge and a second cutting edge, the at least one moving blade including a first moving edge configured for reciprocal movement relative to the first cutting edge, and a second moving edge configured for reciprocal movement relative to the second cutting edge.
A cutting location is defined by the housing for the blades, and the blade chassis is rotatably engageable on the housing between a first position in which the first cutting edge and the first moving edge are disposed at the cutting location, and a second position in which the second cutting edge and the second moving edge are disposed at the cutting location. The cutting location is adjacent the vacuum intake so that hair clippings generated by the cutting action of the blades are drawn into the vacuum intake regardless of which cutting
Francovich Walter
Freas Jon Thomas
Long Jason M.
McCambridge James Edward
Ashley Boyer
Druan, Jr. Thomas J
Wahl Clipper Corporation
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