Controller for hand-held electrical device for cutting hair
First Claim
Patent Images
1. A hair clipper comprising:
- a cutting blade;
a pivot motor coupled to the cutting blade; and
a controller operable to controllably provide electric power to the pivot motor to move the cutting blade at a speed greater than 3,600 blade strokes per minute.
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Accused Products
Abstract
A hair clipper or trimmer including a controller and a pivot motor operable to control a reciprocating blade at a speed greater than 3,600 blade strokes per minute.
57 Citations
34 Claims
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1. A hair clipper comprising:
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a cutting blade;
a pivot motor coupled to the cutting blade; and
a controller operable to controllably provide electric power to the pivot motor to move the cutting blade at a speed greater than 3,600 blade strokes per minute. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A controller for a pivot motor in a hair clipper, the controller comprising:
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a power supply circuit operable to convert an alternating current (AC) signal to a direct current (DC) signal;
a drive circuit operable to receive the DC signal and to generate a plurality of DC pulses; and
a bridge circuit coupled to the pivot motor, the bridge circuit operable to switch the DC pulses, transform the DC pulses to a variable frequency AC signal, and transmit the variable frequency AC signal to the pivot motor. - View Dependent Claims (14, 15, 16)
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17. A hand-held electrical device comprising:
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a housing;
a blade set coupled to the housing, the blade set including a stationary blade and a reciprocating blade;
an actuator supported by the housing, the actuator driveably connected to the blade set; and
a controller supported by the housing, the controller operable to convert an alternating current (AC) signal to a direct current (DC) signal, generate a plurality of DC pulses, and transform the DC pulses to a variable frequency AC signal that is transmitted to the actuator to move the reciprocating blade. - View Dependent Claims (18, 19, 20, 21, 22)
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23. A hair clipper comprising:
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a cutting blade;
a vibratory magnetic motor coupled to the cutting blade; and
a controller operable to controllably provide electric power to the pivot motor to move the cutting blade at a speed greater than 7,200 blade strokes per minute. - View Dependent Claims (24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34)
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Specification