Patents by Inventor Michael James Ede
Michael James Ede has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 10327827Abstract: A torsional-mode ultrasonic vibration generator is manufactured with longitudinal slots extending along its horn which damp unwanted vibrational modes and allow it to be made significantly smaller than previous apparatus. The torsional-mode ultrasonic generator is operable with a suite of surgical tools, to perform portions of an orthopaedic arthroplasty revision procedure. Three of the tools are for removing bone cement from within a bone cavity on a prosthesis cemented into the bone cavity. Three other tools are for separating an uncemented prosthesis from ingrown bone by cutting the bone between the prosthesis and walls of the bone cavity. The seventh tool is provided with sensors to determine a separation between a bone-cutting tool head and a metal prosthesis, feedback from the sensors being used to control servo motors of an articulated mounting for the seventh tool, to maintain the separation at a desirable value.Type: GrantFiled: June 27, 2015Date of Patent: June 25, 2019Assignee: RADLEY SCIENTIFIC LIMITEDInventors: Michael John Radley Young, Stephen Michael Radley Young, Michael James Ede
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Publication number: 20170143398Abstract: A torsional-mode ultrasonic vibration generator is manufactured with longitudinal slots extending along its horn which damp unwanted vibrational modes and allow it to be made significantly smaller than previous apparatus. The torsional-mode ultrasonic generator is operable with a suite of surgical tools, to perform portions of an orthopaedic arthroplasty revision procedure. Three of the tools are for removing bone cement from within a bone cavity on a prosthesis cemented into the bone cavity. Three other tools are for separating an uncemented prosthesis from ingrown bone by cutting the bone between the prosthesis and walls of the bone cavity. The seventh tool is provided with sensors to determine a separation between a bone-cutting tool head and a metal prosthesis, feedback from the sensors being used to control servo motors of an articulated mounting for the seventh tool, to maintain the separation at a desirable value.Type: ApplicationFiled: June 27, 2015Publication date: May 25, 2017Applicant: RADLEY SCIENTIFIC LIMITEDInventors: Michael John Radley YOUNG, Stephen Michael Radley YOUNG, Michael James EDE
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Patent number: 9474542Abstract: A transducer stack (10) includes rings (16) of piezo-electric ceramic alternating with metal electrodes (18) along a threaded central shaft (32) extending from a titanium back plate (20). A spacer or threaded element (14) threaded on to the shaft (32) holds the ceramic rings (16) and electrodes (18) in compression against the back plate (20). The transducer stack (10) is mountable eccentrically to a horn (12) of an ultrasonically-vibratable tool, away from an axis of an elongate waveguide (56) extending from the horn (12). The transducer stack (10) may vibrate in a flexural mode perpendicular to the waveguide (56), generating torsional mode ultrasonic vibrations in the horn (12) and waveguide (56), or in a flexural mode parallel to the waveguide (56), generating longitudinal mode ultrasonic vibrations in the horn (12) and waveguide (56).Type: GrantFiled: May 24, 2013Date of Patent: October 25, 2016Assignee: SRA DEVELOPMENTS LTD.Inventors: James Anton Slipszenko, Michael James Ede, Stephen Michael Radley Young
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Patent number: 8836200Abstract: Apparatus (5,50) for generating torsional-mode ultrasonic vibrations comprises a stack of axially-polarized piezo-electric ceramic rings (10) having a torsional converter (1,51,53) mounted coaxially to either one face of the stack or to two opposite faces thereof. Each torsional converter (1,51,53) has a cross-sectional inhomogeneity comprising a plurality of helically-extending grooves (2,55) extending substantially from end to end of the converter. The grooves (2,55) each have a length, measured axially along the converter (1,51,53), of approximately half the wavelength of ultrasonic vibrations therein. When the stack is energized, the stack and the converter (1) or converters (51,53) resonate together in a purely torsional-mode vibration. The apparatus (5,50) is compact and axisymmetric, and is straightforward to incorporate into a simple tool handpiece. The ultrasonic vibrations may be transmitted along a conventional elongate waveguide (3) of a tool to a distal operative tip (35).Type: GrantFiled: October 27, 2009Date of Patent: September 16, 2014Assignee: SRA Developments LimitedInventors: Michael John Radley Young, Stephen Michael Radley Young, James Anton Slipszenko, Michael James Ede
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Patent number: 8668710Abstract: An ultrasonic surgical tool has an elongate waveguide operatively connected or connectable to a source of ultrasonic vibrations. An operative element at a distal end of the waveguide has a diameter less than that of the waveguide. A connecting portion of intermediate diameter may connect the operative element and the waveguide. A proximal end of the operative element forms a first step junction, located at a nodal plane of ultrasonic vibrations in the waveguide and operative element, producing a velocity amplitude gain across the step junction. A second zero-gain step junction between the connecting portion and the waveguide is located at an anti-nodal plane. The operative element may include a curved distal cutting and welding element having a pair of elongate welding grooves defining a cutting edge. Alternatively, the operative element may include a welding element having a flat or slightly ridged operative face.Type: GrantFiled: May 21, 2009Date of Patent: March 11, 2014Assignee: SRA Developments LimitedInventors: James Anton Slipszenko, Michael James Ede, Stephen Michael Radley Young
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Publication number: 20130253559Abstract: A transducer stack (10) includes rings (16) of piezo-electric ceramic alternating with metal electrodes (18) along a threaded central shaft (32) extending from a titanium back plate (20). A spacer or threaded element (14) threaded on to the shaft (32) holds the ceramic rings (16) and electrodes (18) in compression against the back plate (20). The transducer stack (10) is mountable eccentrically to a horn (12) of an ultrasonically-vibratable tool, away from an axis of an elongate waveguide (56) extending from the horn (12). The transducer stack (10) may vibrate in a flexural mode perpendicular to the waveguide (56), generating torsional mode ultrasonic vibrations in the horn (12) and waveguide (56), or in a flexural mode parallel to the waveguide (56), generating longitudinal mode ultrasonic vibrations in the horn (12) and waveguide (56).Type: ApplicationFiled: May 24, 2013Publication date: September 26, 2013Applicant: SRA DEVELOPMENTS LIMITEDInventors: James Anton SLIPSZENKO, Michael James Ede, Stephen Michael Radley Young
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Publication number: 20110278988Abstract: Apparatus (5,50) for generating torsional-mode ultrasonic vibrations comprises a stack of axially-polarised piezo-electric ceramic rings (10) having a torsional converter (1,51,53) mounted coaxially to either one face of the stack or to two opposite faces thereof. Each torsional converter (1,51,53) has a cross-sectional inhomogeneity comprising a plurality of helically-extending grooves (2,55) extending substantially from end to end of the converter. The grooves (2,55) each have a length, measured axially along the converter (1,51,53), of approximately half the wavelength of ultrasonic vibrations therein. When the stack is energised, the stack and the converter (1) or converters (51,53) resonate together in a purely torsional-mode vibration. The apparatus (5,50) is compact and axisymmetric, and is straightforward to incorporate into a simple tool handpiece. The ultrasonic vibrations may be transmitted along a conventional elongate waveguide (3) of a tool to a distal operative tip (35).Type: ApplicationFiled: October 27, 2009Publication date: November 17, 2011Inventors: Michael John Radley Young, Stephen Michael Radley Young, James Anton Slipszenko, Michael James Ede
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Publication number: 20110190799Abstract: A transducer stack (10) includes rings (16) of piezo-electric ceramic alternating with metal electrodes (18) along a threaded central shaft (32) extending from a titanium back plate (20). A spacer or threaded element (14) threaded on to the shaft (32) holds the ceramic rings (16) and electrodes (18) in compression against the back plate (20). The transducer stack (10) is mountable eccentrically to a horn (12) of an ultrasonically-vibratable tool, away from an axis of an elongate waveguide (56) extending from the horn (12). The transducer stack (10) may vibrate in a flexural mode perpendicular to the waveguide (56), generating torsional mode ultrasonic vibrations in the horn (12) and waveguide (56), or in a flexural mode parallel to the waveguide (56), generating longitudinal mode ultrasonic vibrations in the horn (12) and waveguide (56).Type: ApplicationFiled: May 21, 2009Publication date: August 4, 2011Inventors: James Anton Slipszenko, Michael James Ede, Stephen Michael Radley Young
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Publication number: 20110130780Abstract: An ultrasonic surgical tool has an elongate waveguide (102) operatively connected or connectable to a source of ultrasonic vibrations. An operative element (100, 130, 140) at a distal end of the waveguide (102) has a diameter less than that of the waveguide (102). A connecting portion of intermediate diameter may connect the operative element (100, 130, 140) and the waveguide (102). A proximal end of the operative element (100, 130, 140) forms a first step junction (126, 134), located at a nodal plane of ultrasonic vibrations in the waveguide (102) and operative element, producing a velocity amplitude gain across the step junction. A second zero-gain step junction between the connecting portion and the waveguide (102) is located at an anti-nodal plane. The operative element (100, 130) may comprise a curved distal cutting and welding element (114) having a pair of elongate welding grooves defining a cutting ridge.Type: ApplicationFiled: May 21, 2009Publication date: June 2, 2011Inventors: James Anton Slipszenko, Michael James Ede, Stephen Michael Radley Young