Cutlery – Razors – With cooperating shearing blades
Reexamination Certificate
1997-02-25
2001-04-10
Rachuba, M. (Department: 3724)
Cutlery
Razors
With cooperating shearing blades
C030S043500, C030S043600
Reexamination Certificate
active
06212776
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to an electric shaver and more particularly to an electric rotary shaver.
2. Prior Art
Generally, in electric shavers, particularly in electric rotary shavers, inner cutters are rotated on the under surface of outer cutters; and the hair is cut by the shearing force generated between these two cutters. In some shavers, only one single shaving unit that consists of an inner cutter and an outer cutter is installed in the shaver head of the shaver; and there are also shavers in which two shaving units or three shaving units are installed in the shaver head, each being called a twin-headed shaver and a triple-headed shaver, respectively. In the twin-headed shaver, the shaving units are arranged side by side; and in the three-headed shavers, the shaving units are generally arranged in an inverse equilateral triangle shape so as to obtain the most efficient shaving results.
In any of these shavers currently marketed, only the inner cutters are rotated by a motor installed inside the shaver casing so that the shearing force is obtained between the rotating inner cutter and the non-rotating outer cutter which are designed to be inwardly depressible during shaving.
Since the outer cutter which ordinarily has radial slits for introducing facial hair is not rotated as described above, the hair does not enter into the slits easily, resulting in that shaving is occasionally not performed efficiently. So as to execute a smooth and efficient shave, it is common to move the shaving head (and therefore the outer cutters) circularly on, for example, the face, which sometimes causes muscle fatigue in the arm that holds the shaver; and therefore, such a prior art shaver has a problem with the shaving effect and with the use thereof.
SUMMARY OF THE INVENTION
Accordingly, the primary object of the present invention is to provide an electric shaver that can reduce the necessity of circular movements of the shaver in use, thus ensuring an easy, quick and smooth shave.
It is another object of the present invention to provide an electric shaver having high hair raising and take-in efficiency and hair cutting efficiency by way of a rotatable outer cutter(s) and a rotatable inner cutter(s).
It is still another object of the present invention to provide an electric shaver which includes a rotatable outer cutter(s) which can function as a “comb” so as to smoothly raise and bring the hair into the slits formed on the outer cutter(s) and further between the outer cutter(s) and inner cutter(s), thus ensuring a smooth and quick shave.
The above-described objects of the present invention are accomplished by a unique structure for an electric rotary shaver which includes at least one shaving unit that comprises an outer cutter (outer cutting member) and an inner cutter (inner cutting member) so that not only is the inner cutter rotated but also the outer cutter is rotated via a series of gears provided between a single rotary power source and the shaving unit(s). In other words, according to the electric shaver of the present invention, the outer cutter(s) is provided with a ring gear(s) on, for example, its circumferential surface(s), and this ring gear(s) is meshed with a gear(s) rotated by a transmission gear(s) which is rotated by a drive gear(s) that causes the corresponding inner cutter(s) to rotate.
Furthermore, according to the present invention, the outer cutter(s) and the inner cutter(s) are rotatable not only in the same directions but also in the opposite directions.
REFERENCES:
patent: 2283834 (1942-05-01), Van Dam et al.
patent: 2308920 (1943-01-01), Horowitz et al.
patent: 2742694 (1956-04-01), Stone
patent: 2965966 (1960-12-01), Jacobs
patent: 3715803 (1973-02-01), Tyler
patent: 4089110 (1978-05-01), Rasco
patent: 5007168 (1991-04-01), Messinger et al.
patent: 5031315 (1991-07-01), Labrijn
patent: 5408749 (1995-04-01), Momose
patent: 376798 (1964-05-01), None
patent: 1173817 (1964-07-01), None
patent: 0074684 (1983-03-01), None
patent: 913779 (1946-06-01), None
patent: 1192334 (1959-10-01), None
patent: 1428943 (1966-01-01), None
patent: 634266 (1962-02-01), None
Izumi Shunji
Ozawa Tetsuya
Izuma Products Company
Koda & Androlia
Rachuba M.
LandOfFree
Electric shaver does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Electric shaver, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Electric shaver will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2445754