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Amoah
Francis Amoah, Reading GB
| Patent application number | Description | Published |
|---|---|---|
| 20100286685 | Electrosurgical generator - An electrosurgical generator for coagulating tissue comprises a source of radio frequency (RF) energy, and at least a pair of output terminals for connection to a bipolar electrosurgical instrument adapted to contact tissue, the output terminals delivering RF energy from the source to the instrument such that the source delivers RF energy into tissue. The generator also includes boiling detection means for determining when the RF energy starts to cause the boiling of electrolytes within the tissue. A timer is adapted to determine when a predetermined period of time has elapsed since the boiling detection means has indicated the start of the boiling of electrolytes. An indication means gives an indication when the predetermined period of time has elapsed. | 11-11-2010 |
Francis Amoah, Berkshire GB
| Patent application number | Description | Published |
|---|---|---|
| 20100036371 | ELECTROSURGICAL INSTRUMENT AND SYSTEM - An electrosurgical instrument comprises a body portion, an actuator mechanism associated with the body portion, and first and second jaw members each having a jaw body. The first jaw member includes a first electrode having a relatively large area conductive seal surface and a relatively smaller area edge portion. The second jaw member includes a second electrode also having a relatively large area conductive seal surface and a relatively smaller area edge portion. The first jaw member comprises a third electrode associated with its jaw body, and an insulator separating the first electrode from the third electrode. Operation of the actuator mechanism moves one or both of the first and second jaw members between a first position in which the jaw members are open, a second position in which the first and second jaw members are sufficiently closed so as to be capable of grasping tissue therebetween, and a third position in which the first and second jaw members are further closed such that the conductive seal surfaces are adjacent to one another other such that predominantly the edge portions of one or both of the seal surfaces are exposed. The exposed area of the third electrode is greater than that of the exposed edge portions. When the electrosurgical instrument is connected to an electrosurgical generator, the electrosurgical generator is capable of directing a coagulating RF waveform between the first and second electrodes when the jaw members of the electrosurgical instrument are in their second position with tissue grasped therebetween. The electrosurgical generator is also capable of directing a cutting RF waveform between one or both of the first and second electrodes and the third electrode, when the jaw members of the electrosurgical instrument are in their third position. | 02-11-2010 |
| 20100057071 | ELECTROSURGICAL INSTRUMENT AND SYSTEM - An electrosurgical system for cutting and coagulating tissue includes a generator for generating radio frequency (RF) power, and an electrosurgical instrument. The instrument includes a pair of blades pivotally joined for relative movement in a scissors-like action between open and closed positions, each of said blades including a conductive blade member and a conductive electrode electrically isolated from the blade member by means of an insulation member. A first one of either the conductive blade member or the conductive electrode constitutes an inner electrode on each blade, which are disposed in face-to-face relationship. A second one of either the conductive blade member or the conductive electrode constitutes an outer electrode on each blade spaced from the inner electrode. The instrument further includes an actuation mechanism for effecting relative movement of the blades in said scissors-like action, the generator including at least one source of RF power and a controller such that the generator is capable of delivering a first cutting RF waveform to the electrosurgical instrument or a second coagulating RF waveform to the electrosurgical instrument. The system further includes a switching circuit such that the first cutting RF waveform is delivered between the inner and outer electrodes on each blade, and the second coagulating RF waveform is delivered between the outer electrodes on each blade. | 03-04-2010 |
Francis Amoah, Berks GB
| Patent application number | Description | Published |
|---|---|---|
| 20090198225 | Electrosurgical system - An electrosurgical system includes an electrosurgical generator including at least one source of radio frequency (RF) power, and a plurality of output connections, only one of the output connections at any one time being active in that it is able to receive radio frequency power from the source. The generator includes selection means adapted to change the active output connection, and a controller adapted to control the supply of radio frequency power from the source to the active output connection. The system also includes a plurality of electrosurgical assemblies, each including an electrosurgical instrument and a cable connecting the electrosurgical instrument to one of the output connections. The electrosurgical assemblies each include a handswitch adapted to send a signal to the selection means to change the active output connection. The selection means is such that a signal sent from the handswitch of the active instrument can cause the selection means to change the active output connection to a different output connection, but a signal sent from the handswitch of an instrument other than the active instrument does not immediately cause the selection means to change the active output connection to a different output connection. | 08-06-2009 |
| 20090318915 | Electrosurgical generator and system - An electrosurgical system has an electrosurgical generator with a multiple-phase RF output stage coupled to a multiple-electrode electrosurgical instrument. The instrument has three treatment electrodes each of which is coupled to a respective generator output driven from, for instance, a three-phase output transformer. Continuous RF output voltage waveforms are simultaneously delivered to respective generator outputs at the operating frequency, each waveform being phase-displaced with respect to the other waveforms. The magnitude of the RF output voltage waveform delivered to at least one of the generator outputs is sufficient to cause tissue vaporisation at the respective treatment electrodes when the system is used for tissue treatment. Also disclosed is an electrosurgical generator in which the output transformer has windings forming at least three phases, the transformer core being constructed to provide at least three magnetic circuits each of which is inductively linked to the windings of at least two of the three phases. | 12-24-2009 |
Yoba Amoah, Fairfax, VT US
| Patent application number | Description | Published |
|---|---|---|
| 20120064714 | CONTACT FORMATION METHOD INCORPORATING A PREVENTATIVE ETCH STEP FOR REDUCING INTERLAYER DIELECTRIC MATERIAL FLAKE DEFECTS - Disclosed are embodiments of a contact formation technique that incorporates a preventative etch step to reduce interlayer dielectric material flaking (e.g., borophosphosilicate glass (BPSG) flaking) and, thereby to reduce surface defects. Specifically, contact openings, which extend through a dielectric layer to semiconductor devices in and/or on a center portion of a substrate, can be filled with a conductor layer deposited by chemical vapor deposition (CVD). Chemical mechanical polishing (CMP) of the conductor layer can be performed to complete the contact structures. However, before the CMP process is performed (e.g., either before the contact openings are ever formed or before the contact openings are filled), a preventative etch process can be performed to remove any dielectric material from above the edge portion of the substrate. Removing the dielectric material from above the edge portion of the substrate prior to CMP reduces the occurrence of surface defects caused by dielectric material flaking. | 03-15-2012 |