Selected frequency hair removal device and method
First Claim
Patent Images
1. A hair removal device, comprising:
- (a) radio frequency energy applying means for conveying radio frequency energy to a hair for conduction to the hair papilla(b) radio frequency energy generating means connected to the radio frequency applying means for producing radio frequency energy at a given frequency and voltage, and(c) radio frequency selection means connected to the radio frequency energy generating means and to the radio frequency applying means for providing a radio frequency scan over a wide range of hair conduction frequencies and finding a frequency at which the impedance of a given hair to transmission of radio frequency energy at that frequency is substantially lower than for the other radio frequencies in that frequency range.
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Accused Products
Abstract
Radio frequency energy is applied to a hair at a selected frequency at which that hair impedance to RF energy conduction is substantially lower than at other RF frequencies, to thereby obtain substantially greater energy conduction capability along the hair shaft to the hair papilla.
176 Citations
21 Claims
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1. A hair removal device, comprising:
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(a) radio frequency energy applying means for conveying radio frequency energy to a hair for conduction to the hair papilla (b) radio frequency energy generating means connected to the radio frequency applying means for producing radio frequency energy at a given frequency and voltage, and (c) radio frequency selection means connected to the radio frequency energy generating means and to the radio frequency applying means for providing a radio frequency scan over a wide range of hair conduction frequencies and finding a frequency at which the impedance of a given hair to transmission of radio frequency energy at that frequency is substantially lower than for the other radio frequencies in that frequency range. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A hair removal device, comprising:
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(a) a hand-held electrical tweezer for applying radio frequency energy to a hair which is to be removed, (b) variable radio frequency energy generating means for supplying radio frequency energy to the tweezer at different frequencies, (c) a length of coaxial cable connecting the tweezer and the radio frequency energy generating means, (d) electrical circuit means electrically connected with the tweezer and the radio frequency generating means for minimizing the voltage standing wave ratio in the tweezer, (e) electrical sensing means connected in circuit with the radio frequency energy generating means for sensing the frequency at which the hair has minimum impedance to radio frequency energy, and producing a control signal when such condition occurs, and (f) the variable frequency generating means including a control circuit for producing frequencies within the range of 1 to 200 Megahertz, and being responsive to the control signal for maintaining the sensed frequency at which the hair has minimum impedance to radio frequency energy. - View Dependent Claims (14)
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15. A hair removal device, comprising:
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(a) radio frequency energy applying means including an electrical tweezer connected to a coaxial cable for conveying radio frequency energy to a hair for conduction to the hair papilla, (b) radio frequency energy generating means connected to the coaxial cable of the radio frequency energy applying means for producing radio frequency energy at a given frequency and voltage, (c) electrical conducting means connected in parallel circuit with the coaxial cable of the radio frequency energy applying means and including a grounded impedance having the same value as the impedance of the coaxial cable connected at the junction of the tweezer and the coxial cable for reducing the voltage standing wave ratio in the radio frequency energy applying means.
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16. A hair removal device, comprising:
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(a) radio frequency energy applying means including an electrical tweezer and a connecting coaxial cable for conveying radio frequency energy to a hair for conduction to the hair papilla, (b) radio frequency energy generating means connected to the electrical tweezer through the coaxial cable of the radio frequency energy applying means for producing radio frequency energy over a sweep range of radio frequencies, (c) electrical means connected with the radio frequency energy generating means for providing a low voltage output from the radio frequency energy generating means during the course of the sweep range, and a substantially higher output voltage for that frequency where the hair impedance is substantially less than at other frequencies.
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17. A method for removing hair, comprising the steps of:
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(a) grasping the hair to be removed at a point adjacent the skin surface with a radio frequency energy transmitting tweezer, (b) selecting and applying successive radio frequency energy values which are in the range of from 1 to 200 Megahertz to the tweezer for transmission to the hair; (c) determining the frequency within such range at which the hair impedance is substantially less than for other frequencies, (d) applying voltage at such frequency through the tweezer to the hair for a period of time, and (e) removing the hair by withdrawing the tweezer from the skin surface. - View Dependent Claims (18)
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19. A method for removing blond hair with a radio frequency tweezer hair removal device, comprising:
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(a) setting the hair removal radio frequency tweezer output frequency to a frequency range of from 1 to 15 Megahertz, (b) grasping a blond hair to be removed with the preset radio frequency hair removal tweezer for transmitting such radio frequency to the hair, and (c) applying sufficient radio frequency energy to the tweezer at a frequency within the frequency range of from 1 to 15 Megahertz at which the impedance of the blond hair to transmission of radio frequency energy is at a minimum to bring about removal of the blond hair.
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20. A method for removing red hair with a radio frequency tweezer hair removal device, comprising:
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(a) setting the hair removal radio frequency tweezer output frequency to a frequency range of from 25 to 40 Megahertz, (b) grasping a red hair to be removed with the preset radio frequency hair removal tweezer for transmitting such radio frequency to the hair, and (c) applying sufficient radio frequency energy to the tweezer at a frequency within the frequency range of from 25 to 40 Megahertz at which the impedance of the red hair to transmission of radio frequency energy is at a minimum to bring about removal of the red hair.
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21. A method for removing black hair with a radio frequency tweezer hair removal device, comprising:
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(a) setting the hair removal radio frequency tweezer output frequency to a frequency range of from 75 to 150 Megahertz, (b) grasping a black hair to be removed with the preset radio frequency hair removal tweezer for transmitting such radio frequency to the hair, and (c) applying sufficient radio frequency energy to the tweezer at a frequency within the frequency range of from 75 to 150 Megahertz at which the impedance of the black hair to transmission of radio frequency energy is at a minimum to bring about removal of the black hair.
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Specification