Patents by Inventor Stephen Michael Radley Young
Stephen Michael Radley Young 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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Publication number: 20230293212Abstract: An ultrasonically-vibratable surgical tool for cement removal in revision arthroplasty, comprises an elongate solid shaft. This can be mounted at its proximal end to a source of ultrasonic vibrations, so that the shaft acts as a waveguide for propagation of the ultrasonic vibrations. The shaft has at its distal end an operative head to act on the cement. An intermediate portion of the elongate shaft is provided with at least one row of dimples extending helically along and around that portion of the elongate shaft. Each dimple is separate from each adjacent dimple. The dimples may have a shallow part-spherical profile.Type: ApplicationFiled: July 26, 2021Publication date: September 21, 2023Applicant: RADLEY SCIENTIFIC LIMITEDInventors: Sean Martin BADCOTT, Stephen Michael Radley YOUNG
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Patent number: 11583308Abstract: Apparatus for generating torsional-mode ultrasonic vibrations, for example in a surgical tool, comprises an ultrasonic transducer that would conventionally produce longitudinal-mode ultrasonic vibrations, with a long, hollow, cylindrical, mode converter mounted coaxially to its distal end. A plurality of holes are formed through the walls of the mode converters. These holes are arranged in multiple parallel helical rows, extending along and around the cylindrical mode converters. Holes within the same row are spaced relatively closely, compared with the spacing between rows. Relationships have been established between the hole diameter (d), the spacing between rows (W), the spacing between holes in the same row (l), the spacing between individual holes in adjacent rows (L), and the overall diameter of the mode converter (D). In a preferred version, the holes through the walls of the second mode converter are tapered inwardly, rather than being cylindrical holes as in the first mode converter.Type: GrantFiled: January 17, 2018Date of Patent: February 21, 2023Inventors: Sean Martin Badcott, Stephen Michael Radley Young, Michael John Radley Young
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Publication number: 20210338297Abstract: A series of surgical tools (11, 21, 31, 41, 51, 61, 71, 81) have respective operative heads (16, 26, 36, 46, 56, 66, 76, 86 & 96) mounted adjacent a distal end of an elongate waveguide (12, 13, 14). The operative heads (16, 26, 36, 46, 56, 66, 76, 86 & 96) are used to remove PMMA bone cement (2, 5) from within a hollow bone (1), such as a femur (1), as part of a prosthesis revision operation, such as replacement of an artificial hip joint. Torsional-mode ultrasonic vibrations are transmitted along the waveguide (12, 13, 14) to the respective operative heads (16, 26, 36, 46, 56, 66, 76, 86 & 96), which are applied to the bone cement (2, 5), softening it and facilitating its removal. Elongate radial channels (18, 23, 28, 38) extend across cement-contacting faces of several of the surgical tools (11, 21, 31, 41, 71, 81), acting to focus and transmit the torsional-mode ultrasonic vibrations into adjacent cement (2, 5).Type: ApplicationFiled: September 25, 2019Publication date: November 4, 2021Inventors: Stephen Michael Radley Young, Sean Martin Badcott
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Publication number: 20190365409Abstract: Apparatus for generating torsional-mode ultrasonic vibrations, for example in a surgical tool, comprises an ultrasonic transducer that would conventionally produce longitudinal-mode ultrasonic vibrations, with a long, hollow, cylindrical, mode converter mounted coaxially to its distal end. A plurality of holes are formed through the walls of the mode converters. These holes are arranged in multiple parallel helical rows, extending along and around the cylindrical mode converters. Holes within the same row are spaced relatively closely, compared with the spacing between rows. Relationships have been established between the hole diameter (d), the spacing between rows (W), the spacing between holes in the same row (l), the spacing between individual holes in adjacent rows (L), and the overall diameter of the mode converter (D). In a preferred version, the holes through the walls of the second mode converter are tapered inwardly, rather than being cylindrical holes as in the first mode converter.Type: ApplicationFiled: January 17, 2018Publication date: December 5, 2019Inventors: Sean Michael BADCOTT, Stephen Michael Radley YOUNG, Michael John Radley YOUNG
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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: 9387004Abstract: The ultrasonic surgical tool has an elongate waveguide operatively connected or connectable at a proximal end to a source of ultrasonic vibrations. At a distal end, an operative element comprises a radially-extending ridge defined between a substantially parallel pair of grooves extending longitudinally of the waveguide. The operative element is curved in a plane transverse to that of the ridge. This arrangement is ergonomically superior and allows a surgeon to work for longer and with improved control. It also allows a clear visualization of the operative elements of the tool and the target tissue.Type: GrantFiled: April 22, 2013Date of Patent: July 12, 2016Assignee: SRA DEVELOPMENTS LIMITEDInventors: Michael John Radley Young, Stephen Michael Radley Young
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Patent number: 9358030Abstract: The shaped output is for use with an ultrasonic surgical tool vibratable in torsional mode. The output has a generally cylindrical first waveguide (1) with, at a distal end a second waveguide extension member (3) of reduced diameter. The second waveguide (3) is curved in one plane from the axis of the first waveguide. It has at least two blade faces (4) extending radially outwardly from its distal end.Type: GrantFiled: September 18, 2007Date of Patent: June 7, 2016Assignee: SRA DEVELOPMENTS LIMITEDInventors: Michael John Radley Young, Stephen Michael Radley Young
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Patent number: 9173672Abstract: At the surgical tool's proximal end, there is a first means (3) to generate ultrasonic vibration in a torsional shear mode. There is also a second means (2) to generate ultrasonic vibration in a longitudinal compression mode. A wave guide (4) is operatively connected to both generating means and extending therefrom by a distance of n?/2 to a distal end provided with cutting and/or coagulating means. The ratio of the wavelengths of the longitudinal compression wave and the torsional shear wave, ?c: ??, is an odd number. Preferably ?c=Nx?? (where N is an odd integral number and x is an integer). Delicate shear motion of the torsional ultrasonic vibrational mode is combined with the more vigorous excitation of the longitudinal compression wave ultrasonic vibration.Type: GrantFiled: May 25, 2007Date of Patent: November 3, 2015Assignee: SRA DEVELOPMENTS LIMITEDInventors: Michael John Radley Young, 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: 20130238004Abstract: The ultrasonic surgical tool has an elongate waveguide operatively connected or connectable at a proximal end to a source of ultrasonic vibrations. At a distal end, an operative element comprises a radially-extending ridge defined between a substantially parallel pair of grooves extending longitudinally of the waveguide. The operative element is curved in a plane transverse to that of the ridge. This arrangement is ergonomically superior and allows a surgeon to work for longer and with improved control. It also allows a clear visualization of the operative elements of the tool and the target tissue.Type: ApplicationFiled: April 22, 2013Publication date: September 12, 2013Applicant: SRA Developments LimitedInventors: Michael John Radley YOUNG, Stephen Michael Radley YOUNG
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Patent number: 8242398Abstract: A switch unit (40) is mountable to a distal end of a handpiece of an electrically-activatable surgical tool, such as an ultrasonically-vibratable surgical tool. The switch unit (40) has a generally bullet-shaped outer form with an axial bore (42) through which a waveguide of the tool extends. A resiliently deformable band (1) extends around the switch unit (40) above a polygonal-section contact zone (2), such that fingertip pressure on the band (1) may locally depress the band (1) towards a flat area (12) of the contact zone (2). Switch contacts (11) are mounted to an inner surface of the band (1) opposite a plated circuit (10) located on each flat area (12) so as to form a plurality of switches. A switch to activate the tool is thus easily accessible to a user's fingertip in any orientation of the handpiece in the user's hand. The switch contacts (11) may each comprise a body having an electrical resistance dependent on a pressure exerted thereon.Type: GrantFiled: June 11, 2008Date of Patent: August 14, 2012Assignee: SRA Developments LimitedInventors: Michael John Radley Young, Stephen Michael Radley Young
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Publication number: 20120010537Abstract: The shaped output is for use with an ultrasonic surgical tool vibratable in torsional mode. The output has a generally cylindrical first waveguide (1) with, at a distal end a second waveguide extension member (3) of reduced diameter. The second waveguide (3) is curved in one plane from the axis of the first waveguide. It has at least two blade faces (4) extending radially outwardly from its distal end.Type: ApplicationFiled: September 18, 2007Publication date: January 12, 2012Inventors: Michael John Radley Young, 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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Patent number: 8009508Abstract: The system generates resonant ultrasonic vibrations, preferably in a torsional mode. A control circuit monitors, feedback signals therefrom, which are scanned to determine the frequency at which minima occur. The frequency of the ultrasonic signal is then adjusted to the frequency at which the minimum occurs.Type: GrantFiled: July 18, 2005Date of Patent: August 30, 2011Assignee: SRA Developments LimitedInventors: Michael John Radley Young, Stephen Michael Radley Young
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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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Patent number: D681206Type: GrantFiled: November 16, 2010Date of Patent: April 30, 2013Assignee: SRA Developments LimitedInventor: Stephen Michael Radley Young