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.
11 Citations
9 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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Specification