Patents by Inventor Roger Scherrer
Roger Scherrer 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: 9662217Abstract: A knee prosthesis has a femoral component with a medial condyle defining a constant bearing spacing relative to a central sagittal component plane SP, and a lateral condyle defining divergent bearing spacing from the central sagittal component plane along an extension-to-flexion path. High congruence between the medial articulation surfaces creates a pivot point for external rotation at the medial contact area, while lower congruence in the lateral articulation surfaces allows the lateral femoral condyle to track anteriorly and posteriorly during flexion. The amount of lateral condyle bearing spacing divergence is calculated to produce a substantially linear anteroposterior motion profile of the lateral femoral condyle upon the lateral tibia articular surface throughout a wide range of flexion.Type: GrantFiled: October 8, 2014Date of Patent: May 30, 2017Assignee: Zimmer GmbHInventors: Marco A. H. Heggendorn, Matthias Schäpper, Roger Scherrer
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Patent number: 8992626Abstract: An orthopaedic knee joint prosthesis (10) provides guided motion in a wide range of motion, and in both extension and flexion. In flexion, a tibial bearing component (16) shifts to a first position in which a posterior cam (36) formed in a femoral component (12) engages a tibial spine (18) coupled to a tibial component (14). Contact between the posterior cam and the spine guides the motion profile of the knee joint prosthesis throughout a wide range of flexion movement. In extension, the bearing component shifts to a second position in which an anterior cam (34) formed in the femoral component engages the spine. Contact between the anterior cam and spine guides the motion profile of the knee joint prosthesis throughout a wide range of extension. The anterior and posterior cams, mobile bearing component, and tibial component-mounted spine cooperate to facilitate guided flexion and extension of the knee joint prosthesis throughout a wide range of motion.Type: GrantFiled: November 10, 2011Date of Patent: March 31, 2015Assignee: Zimmer GmbHInventors: Marco A. H. Heggendorn, Roger Scherrer, Matthias Schapper
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Publication number: 20150025644Abstract: A knee prosthesis has a femoral component with a medial condyle defining a constant bearing spacing relative to a central sagittal component plane SP, and a lateral condyle defining divergent bearing spacing from the central sagittal component plane along an extension-to-flexion path. High congruence between the medial articulation surfaces creates a pivot point for external rotation at the medial contact area, while lower congruence in the lateral articulation surfaces allows the lateral femoral condyle to track anteriorly and posteriorly during flexion. The amount of lateral condyle bearing spacing divergence is calculated to produce a substantially linear anteroposterior motion profile of the lateral femoral condyle upon the lateral tibia articular surface throughout a wide range of flexion.Type: ApplicationFiled: October 8, 2014Publication date: January 22, 2015Inventors: Marco A.H. Heggendorn, Matthias Schäpper, Roger Scherrer
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Publication number: 20140018929Abstract: An orthopaedic knee joint prosthesis (10) provides guided motion in a wide range of motion, and in both extension and flexion. In flexion, a tibial bearing component (16) shifts to a first position in which a posterior cam (36) formed in a femoral component (12) engages a tibial spine (18) coupled to a tibial component (14). Contact between the posterior cam and the spine guides the motion profile of the knee joint prosthesis throughout a wide range of flexion movement. In extension, the bearing component shifts to a second position in which an anterior cam (34) formed in the femoral component engages the spine. Contact between the anterior cam and spine guides the motion profile of the knee joint prosthesis throughout a wide range of extension. The anterior and posterior cams, mobile bearing component, and tibial component-mounted spine cooperate to facilitate guided flexion and extension of the knee joint prosthesis throughout a wide range of motion.Type: ApplicationFiled: November 10, 2011Publication date: January 16, 2014Applicant: ZIMMER GMBHInventors: Marco A.H. Heggendorn, Roger Scherrer, Matthias Schapper
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Patent number: 8529631Abstract: The invention relates to a base component for a tibial implant, comprising a lateral compartment (14), a medial compartment (12) and an anterior connection portion (16) which connects the lateral compartment (14) and the medial compartment (12) to one another at anterior. A portion (18) open to posterior is provided between the lateral compartment (14) and the medial compartment (12). The lateral component (14) and the medial component (12) each have a lower side and an upper side, with at least one of the lower sides being configured for the fastening of the base component to the tibia. A marginal web (22, 22?) is formed at at least one of the compartments (12, 14), starting from the upper side, said marginal web forming a receiving shell for a meniscus component (30, 32) of the tibial implant together with the upper side of the compartment.Type: GrantFiled: July 18, 2008Date of Patent: September 10, 2013Assignee: Zimmer, GmbHInventors: Cosimo Donno, Roger Scherrer
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Patent number: 8357202Abstract: One or both of the condyles in a femoral component for a partial or total knee prosthesis includes a J-curve with a plurality of distinct radii, such as 5 or more radii. The centers of the radii are arranged along an arcuate path extending anteroposteriorly so that successively larger radii are serially arranged along the arcuate path from the posterior side of the femoral component to the anterior side. The femoral component provides a high degree of stability throughout the range of motion of the knee prosthesis, and facilitates a close approximation to the motion of a natural knee.Type: GrantFiled: December 22, 2009Date of Patent: January 22, 2013Assignee: Zimmer, GmbHInventors: Marco A. H. Heggendorn, Roger Scherrer, Matthias Schäpper
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Publication number: 20110153026Abstract: One or both of the condyles in a femoral component for a partial or total knee prosthesis includes a J-curve with a plurality of distinct radii, such as 5 or more radii. The centers of the radii are arranged along an arcuate path extending anteroposteriorly so that successively larger radii are serially arranged along the arcuate path from the posterior side of the femoral component to the anterior side. The femoral component provides a high degree of stability throughout the range of motion of the knee prosthesis, and facilitates a close approximation to the motion of a natural knee.Type: ApplicationFiled: December 22, 2009Publication date: June 23, 2011Applicant: ZIMMER, GMBHInventors: Marco A.H. Heggendorn, Roger Scherrer, Matthias Schäpper
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Publication number: 20100016980Abstract: The invention relates to a base component for a tibial implant, comprising a lateral compartment (14), a medial compartment (12) and an anterior connection portion (16) which connects the lateral compartment (14) and the medial compartment (12) to one another at anterior. A portion (18) open to posterior is provided between the lateral compartment (14) and the medial compartment (12). The lateral component (14) and the medial component (12) each have a lower side and an upper side, with at least one of the lower sides being configured for the fastening of the base component to the tibia. A marginal web (22, 22?) is formed at at least one of the compartments (12, 14), starting from the upper side, said marginal web forming a receiving shell for a meniscus component (30, 32) of the tibial implant together with the upper side of the compartment.Type: ApplicationFiled: July 18, 2008Publication date: January 21, 2010Applicant: ZIMMER GMBHInventors: Cosimo Donno, Roger Scherrer
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Patent number: 6804466Abstract: An optical coding system is provided for a data transmission device with at least one laser transmitter and at least one laser receiver. The laser transmitter has a laser device and a code generator, and the laser receiver a detector device and an evaluation circuit. The detector device is designed for detecting a burst sequence (B1, B2, B3, . . . ), wherein the length d of the pulses of a burst is greater than 400 ns, and the length D of a burst consisting of a number b of pulses is less than 1000 &mgr;s.Type: GrantFiled: December 23, 1999Date of Patent: October 12, 2004Assignee: Contraves Space AGInventors: Moreno Gazzetta, Roger Scherrer, Dietrich Peter Stauffacher
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Patent number: 6755864Abstract: A tibia part for a knee joint prosthesis. The prosthesis includes a tibia bearing surface for the support of a bearing body and a bore for the reception of a guiding element. A cut-out for the rear cruciate ligament is provided in the tibia bearing surface and the bore is formed in such a manner that it can, depending on the design of the guiding element, receive the latter either rotationally fixedly relative to the tibia part or rotatably relative to the tibia part.Type: GrantFiled: September 22, 2000Date of Patent: June 29, 2004Assignee: Sulzer Orthopedics Ltd.Inventors: René Brack, Roger Scherrer, Vincent Leclercq