Patents by Inventor John Andrew Storer

John Andrew Storer 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).

  • Patent number: 6840942
    Abstract: A prosthetic implant cement deflector is provided for use in prosthetic surgery when employing an implant in the form of a cannulated phantom or trial prosthesis in combination with a cannulated or cannulated surgical prosthesis or a cannulated prosthesis without a phantom prosthesis. Each cannulated phantom prosthesis or cannulated prosthesis has an insert portion for location in a bone canal and a cannulation bore extending through the insert portion to receive a guide wire. The phantom includes at least one cement deflector element adapted to slide in sealing engagement on the guide wire and which can act to seal the interface between the guide wire and the surface of the distal end of the cannulation bore. The sheath used with the implant has a preformed unperforated sheath adapted to extend over the insert portion of the implant from its distal end to a position at or adjacent to its proximal end.
    Type: Grant
    Filed: November 13, 2001
    Date of Patent: January 11, 2005
    Assignee: Benoist Girard SAS
    Inventors: John Andrew Storer, Andrew John Timperley
  • Patent number: 6758864
    Abstract: The present invention is intended to provide a cementless prosthetic bearing element which has been molded and which is possible to place in an acetabular socket without cement, the outer surface of the backing being provided with elements to assist stabilization and the ingrowth of bone. Thus, the bearing element is cheaper and easier to produce and provides superior location and installation in the bone. According to the present invention a cementless prosthetic bearing element comprises a backing which supports a bearing liner having a bearing surface, the backing being molded from a rigid polymeric material and said bearing liner being made from elastomeric polyurethane material to which the backing is molded with an outer surface which includes a number of raised engagement features provided in directions extending away from and/or towards the outer periphery of the outer surface.
    Type: Grant
    Filed: November 5, 2001
    Date of Patent: July 6, 2004
    Assignee: Benoist Girard SAS
    Inventors: John Andrew Storer, Richard Eddy Field, Neil Rushton
  • Patent number: 6626948
    Abstract: A prosthetic femoral component is located in a prepared socket in a femur which has been resected at a position on the proximal side of its neck. The component includes an insert portion and an enlarged proximal head portion the distal end of the head portion being adapted for location in the prepared socket. The component takes advantage of the bone at the periphery of the socket which enables the insert and the part of the head concerned to be accurately and firmly located in the bone. The presence of the bone at the outer edges of the socket helps to stabilize the component. The insert portion can be dimensioned to pass through the neck of the femur with which it is to be used or to be shorter depending upon the requirements.
    Type: Grant
    Filed: March 26, 2001
    Date of Patent: September 30, 2003
    Assignee: Benoist Girard SAS
    Inventors: John Andrew Storer, Richard Eddy Field, Neil Rushton
  • Patent number: 6524343
    Abstract: A prosthetic femoral component is located in a prepared socket in a femur which has been resected at a position on the proximal side of its neck and Includes a tapered insert and a proximal head portion. The proximal end of the insert portion is adapted for location in the prepared socket and has a maximum dimension in a plane normal to the distal-proximal axis of the neck which is larger than the minimum dimension of the neck in a parallel plane. The component takes advantage of the bone at the periphery of the socket which enables the insert to be accurately and firmly located in the bone. The presence of the bone at the outer edges of the socket helps to stabilize the component. Preferably the tapered insert portion is flared outwardly in the proximal direction. The tapered insert portion can be dimensioned to pass through the neck of the femur with which it is to be used or it can stop short of it.
    Type: Grant
    Filed: March 23, 2001
    Date of Patent: February 25, 2003
    Assignee: Benoist Girard SAS
    Inventors: John Andrew Storer, Richard Eddy Field, Neil Rushton
  • Publication number: 20020116005
    Abstract: A prosthetic implant cement deflector is provided for use in prosthetic surgery when employing an implant in the form of a cannulated phantom or trial prosthesis in combination with a cannulated or cannulated surgical prosthesis or a cannulated prosthesis without a phantom prosthesis. Each cannulated phantom prosthesis or cannulated prosthesis has an insert portion for location in a bone canal and a cannulation bore extending through the insert portion to receive a guide wire. The phantom includes at least one cement deflector element adapted to slide in sealing engagement on the guide wire and which can act to seal the interface between the guide wire and the surface of the distal end of the cannulation bore. The sheath used with the implant has a preformed unperforated sheath adapted to extend over the insert portion of the implant from its distal end to a position at or adjacent to its proximal end.
    Type: Application
    Filed: November 13, 2001
    Publication date: August 22, 2002
    Inventors: John Andrew Storer, Andrew John Timperley
  • Publication number: 20020107577
    Abstract: The present invention is intended to provide a cementless prosthetic bearing element which has been molded and which is possible to place in an acetabular socket without cement, the outer surface of the backing being provided with elements to assist stabilization and the ingrowth of bone. Thus, the bearing element is cheaper and easier to produce and provides superior location and installation in the bone. According to the present invention a cementless prosthetic bearing element comprises a backing which supports a bearing liner having a bearing surface, the backing being molded from a rigid polymeric material and said bearing liner being made from elastomeric polyurethane material to which the backing is molded with an outer surface which includes a number of raised engagement features provided in directions extending away from and/or towards the outer periphery of the outer surface.
    Type: Application
    Filed: November 5, 2001
    Publication date: August 8, 2002
    Inventors: John Andrew Storer, Richard Eddy Field, Neil Rushton
  • Publication number: 20020065562
    Abstract: A prosthetic femoral component is located in a prepared socket in a femur which has been resected at a position on the proximal side of its neck and includes a tapered insert and a proximal head portion. The proximal end of the insert portion is adapted for location in the prepared socket and has a maximum dimension in a plane normal to the distal-proximal axis of the neck which is larger than the minimum dimension of the neck in a parallel plane. The component takes advantage of the bone at the periphery of the socket which enables the insert to be accurately and firmly located in the bone. The presence of the bone at the outer edges of the socket helps to stabilize the component. Preferably the tapered insert portion is flared outwardly in the proximal direction. The tapered insert portion can be dimensioned to pass through the neck of the femur with which it is to be used or it can stop short of it.
    Type: Application
    Filed: March 23, 2001
    Publication date: May 30, 2002
    Inventors: John Andrew Storer, Richard Eddy Field, Neil Rushton
  • Patent number: 6383224
    Abstract: A prosthetic fixing plate comprises a component to be located into the acetabulum prior to the insertion of a prosthetic ball joint cap. The plate has a closure wall adapted to close the wall or rim of the acetabulum across any discontinuity therein, and a locator is provided for locating said closure wall in place. The fixing plate can be supplied in various sizes and arrangements, the correct plate being chosen by the surgeon after close examination of X-ray photographs of the patient and through the use of a template which is used to determine the size and arrangement of the discontinuity and thus the correct size and arrangement of the plate to be used.
    Type: Grant
    Filed: December 16, 1999
    Date of Patent: May 7, 2002
    Assignee: Benoist Girard SAS
    Inventors: Graham Allan Gie, Robin Sydney Mackwood Ling, John Andrew Storer, Andrew John Timperley
  • Publication number: 20020049501
    Abstract: A prosthetic femoral component is located in a prepared socket in a femur which has been resected at a position on the proximal side of its neck. The component includes an insert portion and an enlarged proximal head portion the distal end of the head portion being adapted for location in the prepared socket. The component takes advantage of the bone at the periphery of the socket which enables the insert and the part of the head concerned to be accurately and firmly located in the bone. The presence of the bone at the outer edges of the socket helps to stabilize the component. The insert portion can be dimensioned to pass through the neck of the femur with which it is to be used or to be shorter depending upon the requirements.
    Type: Application
    Filed: March 26, 2001
    Publication date: April 25, 2002
    Inventors: John Andrew Storer, Richard Eddy Field, Neil Rushton
  • Publication number: 20020045949
    Abstract: A prosthesis provided with a stem at least part of which is enclosed in a mantle and which is for insertion in a bone cavity and attachment thereto by cement, said mantle having a wall thickness which is increased towards its proximal end to provide an outwardly projecting proximal balcony and which is dimensioned and adapted to locate the stem in a predetermined position within the cross-sectional area of the bone cavity at or towards the proximal end thereof.
    Type: Application
    Filed: September 12, 2001
    Publication date: April 18, 2002
    Inventors: Robin Sydney Mackwood Ling, Graham Allan Gie, Andrew John Timperley, John Andrew Storer
  • Publication number: 20020007220
    Abstract: A femoral component for a hip replacement joint having a tapered collarless stem for being cemented in a medullary canal. The proximal portion of the stem has a taper and the distal segment is generally circular in cross-section and has a length equal to or greater than the proximal portion. The component can be made in two separate pieces and can be coupled in the metaphysical area of the femur. In one embodiment, at the proximal end of the stem, there is a pronounced laterally projecting heel adapted to extend into the greater trochanter of the femur of the femur into which it is to be filled. Thus, the distal facing part of the heel can provide a lateral portion which is greater than that of known collarless stems and which is particularly adapted to resist torque. In order to fit the femoral component in the medullary canal, it is necessary to broach the medullary canal so that there is a cavity within the greater trochanter.
    Type: Application
    Filed: December 16, 1999
    Publication date: January 17, 2002
    Inventors: GRAHAM ALLAN GIE, ROBIN SYDNEY MACKWOOD LING, JOHN ANDREW STORER, ANDREW JOHN TIMPERLEY
  • Patent number: 6306174
    Abstract: A femoral component of a replacement hip joint is provided which has a stem for fixing in cement in a medullary cavity by cement and having a separate proximal component provided with a neck for a ball head. An attachment system is provided for securing the proximal component to the stem which allows selection of an infinite number of angularly displaced positions about a proximal/distal axis, and adapted to allow fixation of the two parts after insertion of the stem into the prepared medullary cavity and without causing torsional loads on the stem. The stem extends proximally to the level of the bone cut which allows the proximal component to rotate after the stem is implanted. If an infinite number of angularly displaced positions is not required, then a Vernier coupling system with a large member of positions can be used.
    Type: Grant
    Filed: December 16, 1999
    Date of Patent: October 23, 2001
    Assignee: Benoist Girard SAS
    Inventors: Graham Allan Gie, Robin Sydney Mackwood Ling, John Andrew Storer, Andrew John Timperley
  • Publication number: 20010004712
    Abstract: A prosthesis provided with a stem at least part of which is enclosed in a mantle and which is for insertion in a bone cavity and attachment thereto by cement, said mantle having a wall thickness which is increased towards its proximal end to provide an outwardly projecting proximal balcony and which is dimensioned and adapted to locate the stem in a predetermined position within the cross-sectional area of the bone cavity at or towards the proximal end thereof.
    Type: Application
    Filed: June 1, 1999
    Publication date: June 21, 2001
    Inventors: ROBIN SYDNEY MACKWOOD LING, GRAHAM ALLAN GIE, ANDREW JOHN TIMPERLEY, JOHN ANDREW STORER
  • Patent number: 6241772
    Abstract: A device for plugging the medullary canal of a bone to prevent the passage of locating cement and for centralising or guiding the stem of a prosthesis comprising a main body portion adapted to engage the wall of the canal to act as a plug and having a centralising or guide opening to receive the stem of the prosthesis.
    Type: Grant
    Filed: June 1, 1999
    Date of Patent: June 5, 2001
    Assignee: Benoist Girard SAS
    Inventors: Robin Sydney Mackwood Ling, Graham Allan Gie, Andrew John Timperley, Denis Pichon, John Andrew Storer
  • Patent number: 6217583
    Abstract: A prosthetic implant cement deflector for use in prosthetic surgery used when employing a cannulated phantom prosthesis and/or prosthesis having a bore for utilizing a guide wire and provided with an insert portion. The cement deflector element is adapted to slide on a guide wire and has an external profile large enough to seal the interface distal tip between the guide wire and the surface of the distal end of the bore.
    Type: Grant
    Filed: October 15, 1999
    Date of Patent: April 17, 2001
    Assignee: Benoist Girard SAS
    Inventor: John Andrew Storer
  • Patent number: 6214053
    Abstract: A prosthesis provided with a device for guiding its stem in a bone cavity and in which it is to be attached by cement. The sleeve guiding device comprises a sleeve having an opening to receive the stem and locate the sleeve on the stem at a position at or towards its proximal end. The is dimensioned and adapted to locate the stem in a predetermined position within the cross-sectional area of the bore of the bone cavity.
    Type: Grant
    Filed: June 1, 1999
    Date of Patent: April 10, 2001
    Assignee: Benoist Girard SAS
    Inventors: Robin Sydney Mackwood Ling, Graham Allan Gie, Andrew John Timperley, John Andrew Storer
  • Patent number: 6200319
    Abstract: A surgical trephine is adapted for boring an opening in tamped bone chips and includes a hollow elongate body portion having an internal bore and the distal end of which has an annular cutting rim. A piston is located in the bore with a piston surface facing towards the cutting rim and a tool for moving the piston in the bore. With this device an elongate cavity can be cut in the bone chips. The debris from the cutting the bore enters the distal end of the internal bore and slowly pushes the piston up the bore away from the distal end. When the hollow elongate body portion is withdrawn from the cavity, the chips can then be easily dislodged from the bore by displacing the piston.
    Type: Grant
    Filed: October 13, 1999
    Date of Patent: March 13, 2001
    Assignee: Benoist Girard SAS
    Inventors: John Andrew Storer, Jean-Claude Bachelier
  • Patent number: 6123730
    Abstract: A prosthesis provided with a stem for fixation with cement in a bone socket, the proximal portion of the stem being provided with a number of shaped projections which are dimensioned to contact the inner wall of the bone socket and to act to guide the proximal end of the stem therein.
    Type: Grant
    Filed: June 1, 1999
    Date of Patent: September 26, 2000
    Assignee: Benoist Girard SAS
    Inventors: Robin Sydney Mackwood Ling, Graham Allan Gie, Andrew John Timperley, John Andrew Storer
  • Patent number: 6113605
    Abstract: An insertion system for a prosthesis has an inserter with a box-like attachment device mounted therein. The attachment device has an end wall, a bottom wall and a pair of sidewalls with a crossbar spaced from said bottom wall extending between said side walls. A resilient adapter engages a trunion on the prosthesis and includes an arm designed to engage the attachment device by locking under the crossbar. To prevent rotation a spring-loaded retractable rod is mounted within the inserter and can be selectively moved into and out of engagement with a locating element on the prosthesis.
    Type: Grant
    Filed: February 25, 1999
    Date of Patent: September 5, 2000
    Assignee: Benoist Girard & Cie
    Inventor: John Andrew Storer
  • Patent number: 6110179
    Abstract: A prosthetic hip inserter is designed for use when implanting a hip stem with bone cement. The inserter includes an attachment device for securing and holding the hip implant prior to and during insertion into the medullary canal of the femur. The inserter includes a pressurizer carried on the end of the inserter which carries the attachment device. The pressurizer includes a seal which surrounds at least part of the outer circumference of the prosthesis to be implanted. This both prevents the escape of and application of pressure to the bone cement prior to its curing. The thickness of the seal can be used to adjust the depth of insertion of the hip implant stem.
    Type: Grant
    Filed: February 26, 1999
    Date of Patent: August 29, 2000
    Assignee: Benoist Girard SAS
    Inventors: Gunnar Tore Flivik, Krister Wulff, John Andrew Storer