Battery-Powered Electrosurgical Forceps with Multi-Turn Selectable-Ratio Transformer
First Claim
1. An electrocautery surgical device, comprising:
- a battery power source; and
radio-frequency signal generating circuitry electrically coupled to the battery power source and operable to deliver power to an electrosurgical forceps, the radio-frequency signal generating circuitry comprising;
a transformer having a primary winding and a secondary winding, the secondary winding being comprised of a first secondary sub-winding and a second secondary sub-winding;
at least one switching component electrically coupled to the first and second secondary sub-windings and operable to switch between engaging the first secondary sub-winding and engaging the second secondary sub-winding such that a current induced by the primary winding flows through either the first secondary sub-winding or the second secondary sub-winding; and
the first and second secondary sub-windings having a different number of turns such that the radio-frequency signal generating circuitry produces a different impedance value depending on which of the first or second secondary sub-windings is engaged.
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Accused Products
Abstract
An electrocautery surgical device comprising a battery source and radio-frequency signal generating circuitry electrically coupled to the battery source and operable to deliver power. In an exemplary embodiment, the radio-frequency signal generating circuitry comprises a transformer having a primary winding and a secondary winding wherein the secondary winding is comprised of a first secondary sub-winding and a second secondary sub-winding, at least one switching component electrically coupled to the first and second secondary sub-windings and operable to switch between engaging the first secondary sub-winding and engaging the second secondary sub-winding such that a current induced by the primary winding flows through either the first secondary sub-winding or the second secondary sub-winding, wherein the first and second secondary sub-windings have a different number of turns such that the radio-frequency signal generating circuitry produces a different impedance value depending on which of the first or second secondary sub-windings is engaged.
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Citations
25 Claims
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1. An electrocautery surgical device, comprising:
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a battery power source; and radio-frequency signal generating circuitry electrically coupled to the battery power source and operable to deliver power to an electrosurgical forceps, the radio-frequency signal generating circuitry comprising; a transformer having a primary winding and a secondary winding, the secondary winding being comprised of a first secondary sub-winding and a second secondary sub-winding; at least one switching component electrically coupled to the first and second secondary sub-windings and operable to switch between engaging the first secondary sub-winding and engaging the second secondary sub-winding such that a current induced by the primary winding flows through either the first secondary sub-winding or the second secondary sub-winding; and the first and second secondary sub-windings having a different number of turns such that the radio-frequency signal generating circuitry produces a different impedance value depending on which of the first or second secondary sub-windings is engaged. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. An electrocautery surgical device, comprising:
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a battery power source; and radio-frequency signal generating circuitry electrically coupled to the battery power source and operable to deliver power to an electrosurgical forceps, the radio-frequency signal generating circuitry comprising; a transformer having a primary winding and a secondary winding, the primary winding being comprised of a first primary sub-winding and a second primary sub-winding, the first and second primary sub-windings being connected to ground; a first switching component, a second switching component, and a third switching component being electrically coupled to the first and second primary sub-windings and operable to switch between engaging the first primary sub-winding and engaging the second primary sub-winding such that a current flows through either the first primary sub-winding or the second primary sub-winding, the third switching component being connected to the second switching component and ground; and the first and second primary sub-windings having a different number of turns such that the radio-frequency signal generating circuitry produces a different impedance value depending on which of the first or second primary sub-windings is engaged. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25)
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Specification