179 results about "Mobile bearing" patented technology

A mobile bearing implant includes a first component. The first component includes a bone facing surface for engaging one of a substantially uncut articular cartilage surface and a substantially uncut subchondral bone surface. The bone facing surface substantially matches the one of the articular cartilage surface and the subchondral bone surface. The mobile bearing implant further includes an external surface. A bearing component has a first surface for slidingly engaging the external surface of the first component, and a second surface for engaging at least one of a second component, bone, and cartilage.

Artificial implants having reduced area to provide reduced wear are provided. The reduced area is particularly located at areas where greatest wear is exhibited. In a particular embodiment of a mobile bearing knee implant, the area is reduced on the mobile bearing insert underside, where it contacts a tibial component. The reduced area may be any shape of indentations, for example, grooves, dimples, straight patterns, curved patterns, crossing patterns, holes, channels or slots. The indentations may be various sizes, and have been found to be particularly effective if covering about 10% to about 20% of the insert at depths between about 1-2 mm.

An orthopedic implant with a diffusion-hardened surface on non-load bearing areas of the implant for interaction with non-load bearing surfaces of a polymeric bio-compatible material, such as UHMWPE (ultra-high molecular weight polyethylene). The orthopedic implant is a mobile-bearing knee prosthetic and system where a coating of oxidized zirconium is formed on the post of the tibial tray of the prosthetic for interaction with an opening of a polymeric tibial insert. The diffusion-hardened surface of the orthopedic implant provides a strengthened post and reduction in wear in the opening of the polymeric insert.

A mobile bearing knee prosthesis apparatus includes a tibial plate. The tibial plate includes a medial lobe and a lateral lobe conjoined in a dividing plane. The apparatus further includes a tibio-femoral insert and a stud-like protuberance extending from the tibial plate into the tibio-femoral insert. The stud-like protuberance includes a protuberance sidewall positioned in the tibio-femoral insert. The protuberance sidewall is bisected by the dividing plane and includes a pair of opposing eccentric convex arcuate portions, and the tibio-femoral insert is moveable relative to the tibial plate about an axis medially disposed from the dividing plane. A mobile bearing knee prosthesis apparatus includes a tibial plate and a tibio-femoral insert coupled to the tibial plate. The tibio-femoral insert includes a generally posteriorly positioned chamfered superior surface and defines a generally posteriorly positioned generally U-shaped space bounded at least in part by the chamfered surface.

A mobile bearing implant includes a first component. The first component includes a bone facing surface for engaging one of a substantially uncut articular cartilage surface and a substantially uncut subchondral bone surface. The bone facing surface substantially matches the one of the articular cartilage surface and the subchondral bone surface. The mobile bearing implant further includes an external surface. A bearing component has a first surface for slidingly engaging the external surface of the first component, and a second surface for engaging at least one of a second component, bone, and cartilage.

The present invention generally comprises a fixed bearing prosthesis and a mobile bearing prosthesis. The fixed bearing prosthesis comprises a tibial component, a femoral component and a meniscal component and addressees the loss of congruency during deep knee flexion and the possible direct, repetitive contact of the tibial and femoral components. The tibial component of the fixed bearing prosthesis includes a tibial platform having an anterior and posterior edge. The meniscal component of the fixed bearing prosthesis includes a posterior ridge overlapping the posterior edge of the tibial platform that prevents metal-to-metal contact during deep knee flexion. The mobile bearing prosthesis comprises generally a tibial component, a femoral component and a meniscal component addresses the lack of conformity to natural biomechanical movement. The tibial component comprises a tibial platform having a curved rail system designed to mimic the asymmetrical rotation of femoral rollback while simultaneously providing sufficient anterior-posterior translation.

A mobile bearing knee prosthesis apparatus includes a tibial plate. The tibial plate includes a medial lobe and a lateral lobe conjoined in a dividing plane. The apparatus further includes a tibio-femoral insert and a stud-like protuberance extending from the tibial plate into the tibio-femoral insert. The stud-like protuberance includes a protuberance sidewall positioned in the tibio-femoral insert. The protuberance sidewall is bisected by the dividing plane and includes a pair of opposing eccentric convex arcuate portions, and the tibio-femoral insert is moveable relative to the tibial plate about an axis medially disposed from the dividing plane. A mobile bearing knee prosthesis apparatus includes a tibial plate and a tibio-femoral insert coupled to the tibial plate. The tibio-femoral insert includes a generally posteriorly positioned chamfered superior surface and defines a generally posteriorly positioned generally U-shaped space bounded at least in part by the chamfered surface.

An orthopedic knee component for implanting within a single compartment of a human knee includes, in a first embodiment a tibial tray having a superior surface having a plurality of tabs disposed along an exterior edge thereof, a bearing component having a superior surface adapted to articularly engage a femoral knee prosthesis and a circumferential groove disposed therearound with which the tabs of the tibial tray cooperatively engage such that the bearing component is movable relative to the tibial tray. In a second embodiment, an orthopedic knee component for implanting within a single compartment of a human knee includes: a tibial tray in supporting engagement with a bearing component, wherein the bearing component includes a superior surface adapted to articularly engage a femoral knee prosthesis and a pair of slots disposed along the superior surface of the bearing component, the femoral component having a pair of rails extending from the articulating surface thereof such that the rails can slidingly engage the slots, and such that the bearing component is movable relative to the tibial tray.

A disc replacement device is provided for replacing a spinal disc in an animal subject. The disc replacement device includes a shell, a fulcrum, and a damping sleeve. The shell further comprises a first portion adapted for articulating with the fulcrum such as a spherical stainless steel ball, and a second portion adapted for coupling with the damping sleeve.

A knee prosthetic system includes a femoral component, a fixed tibial bearing component, a mobile tibial bearing component and an integrated or common tibial base component. The same tibial base component can be used with either the fixed tibial bearing component or the mobile tibial bearing component. The fixed bearing component and tibial base component have mating anti-rotation features. One embodiment of the mobile bearing component does not engage the anti-rotation feature of the tibial base component. Another embodiment engages the anti-rotation feature to allow for limited rotation.

A tibial component for a knee prosthesis comprises a tibial platform and a wedge-shaped keel which is disengageably attachable to the tibial platform. The tibial platform has a superior surface for supporting a fixed or mobile bearing component and an inferior surface which, when the tibial platform and the keel are engaged with each other, is spaced from an upper surface of the keel. A knee prosthesis having the tibial component , and a system are also provided.

Artificial disc replacements (ADRS) are configured for implantation using a lateral, anterior-lateral, or posterior-lateral approach. A first component having a first segment resides in the disc space for articulation purposes, with a second segment adapted for fixation to the lateral outer surface of one of the vertebral bodies. A second component having a first segment resides in the disc space for articulation purposes, with a second segment adapted for fixation to the lateral outer surface of the other vertebral body. The first segments of the two components may articulate against one another without a spacer, or a spacer forming a mobile bearing may be disposed between the first segments of the two components. In the preferred embodiment, one or both of the two components are in the form of bent plates such that the second segment is positioned against a lateral wall for fixation. In the preferred embodiment, screws are used through the second segment and into a vertebral body. The screws are located in different vertical locations, and may diverge or converge vertically or horizontally to resist pull-out.

A knee prosthetic system includes a femoral component, a fixed tibial bearing component, a mobile tibial bearing component and an integrated or common tibial base component. The same tibial base component can be used with either the fixed tibial bearing component or the mobile tibial bearing component. The fixed bearing component and tibial base component have mating anti-rotation features. One embodiment of the mobile bearing component does not engage the anti-rotation feature of the tibial base component. Another embodiment engages the anti-rotation feature to allow for limited rotation.

The invention discloses a test device for simulating a tunnel seismic response under fault movements, which comprises a vibration table, a model test box, a guide rail underframe, a guide rail, a calibrated rod, a spring matrix, a spring mounting plate, a load-bearing bottom plate, an adjustment connecting rod, a fixed bearing, a mobile bearing, a lifting drawer, a jack base and a hydraulic jack. The invention further discloses two test method adopted by the test device for simulating the tunnel seismic response under the fault movements, and the two methods are respectively used for normal fault simulation and reverse fault simulation. A dynamic response of a seismic action in a condition that a fault movement force acts on a tunnel model can be realized by adopting the test device disclosed by the invention, the fault movement force is provided by the hydraulic jack, faults with any inclination angle can be simulated, and the spring matrix can ensure continuous dynamic movements of a hanging side soil body when the vibration table is in operation, so that stress of the tunnel model is enabled to be more consistent with actual situations, the authenticity and the precision of a test result are significantly improved, and research on anti-seismic and shock absorption design of a fault crossing tunnel is facilitated.

An elbow prosthesis is provided. The elbow prosthesis includes an ulnar component. The ulnar component has a first portion of the ulnar component that is implantable in a cavity formed in the ulna. The ulnar component has a second portion operabley associated with the first portion. The elbow prosthesis also includes a humeral component having a first portion of the humeral component that is implantable in a cavity formed in the humerus. The first portion of the humeral component defines a longitudinal axis of the first portion and a second portion of the humeral component. The humeral component also has a second portion operably connected to the second portion of the ulnar component. The second portion of the humeral component is rotatably connected to the first portion of said humeral component about the longitudinal axis.

The invention relates to the technical field lifting machines, in particular to a manual and electric integrated mobile lifting work platform. The manual and electric integrated mobile lifting work platform comprises a mobile bearing trolley and a lifting platform body. The lifting platform body is fixed to the bearing trolley and comprises a lifting mechanism and a driving mechanism. The lifting mechanism is a shear type lifting mechanism. The driving mechanism comprises an electric driving end, a manual driving end and a wedge-shaped block device. The electric driving end and the manual driving end are connected with the wedge-shaped block device. The wedge-shaped block device is connected with the shear type lifting mechanism. The manual and electric integrated mobile lifting work platform has the beneficial effects that the structure is simple, cost is low, two driving manners are achieved, and the use reliability of equipment under an external field working condition can be ensured; and the mechanical lifting platform body is adopted, so that the equipment size and weight are reduced, stability and precision are improved, more advantages are achieved during assembly and butt joint, and the manual and electric integrated mobile lifting work platform is suitable for being applied and popularized.

The invention relates to a substrate-precise-positioning workpiece stage which is characterized in that X-direction and Y-direction fixed positioning elements and a mobile bearing positioning element are arranged on the workpiece stage. A sensor is arranged on the mobile bearing positioning element, such that substrate arrangement position deviation can be measured instantly. According to the workpiece stage that can carry out a pre-alignment operation upon the substrate, substrate pre-alignment operation can be rapidly and simply carried out directly on the workpiece stage, and an alignment precision is high. A repetitive positioning accuracy can reach a micrometer-level.

Disclosed herein are improved methods, apparatus and / or systems for a tibial implant assembly that can facilitate balancing, positioning, insertion, locking and maneuvering of the modular tibial inserts during knee surgery. The system may include a plurality of modular tibial inserts with locking or engagement mechanisms that allow creation of a modular insert assembly, and a corresponding tibial tray and optional tray components. The system allows the quick and convenient mating and locking of the tibial insert assembly to the tibial tray. The various components can accommodate mobile-bearing and fixed-bearing designs for the tibial tray.

A mobile bearing calculator having a geomagnetic sensor for detecting earth-magnetism and a control unit for calculating a geographical bearing based on detection values of the geomagnetic sensor. The control unit monitors for an event such as a change of operation of electronic parts mounted on the mobile bearing calculator and corrects the geographical bearing in accordance with the occurrence of the event.

A method of implanting a lateral unicondylar knee prosthesis in a lateral articulating portion of a femur having a lateral condyle for engagement with a tibia, the method including the steps of: bending a patients knee such that the knee is not in full extension; making an incision through the skin, muscle, and other soft tissue until the damaged bone surfaces are exposed; resecting an end portion of the lateral tibia; resecting an end portion of the lateral femoral condyle; attaching a tibial prosthetic component to the resected end portion of the tibia; attaching a lateral femoral condyle prosthetic component to the resected end portion of the lateral femoral condyle; determining the thickness of a mobile bearing member with the knee in full extension; and inserting the mobile bearing member between the tibial prosthetic component and the femoral prosthetic component.

The invention discloses a double-interface memory device, which comprises a memory module, a first interface and a second interface that connect the memory module, a shell containing the memory module, the first interface and the second interface, and a mobile bearing rack bearing the memory module, the first interface and the second interface. Both ends of the shell are provided with a first opening and a second opening respectively, enabling the first interface or the second interface to penetrate the shell.

A radially movable bearing for a shaft of a gear in a steering system includes a bush or outer ring that is supported in a receiving element of a mount or housing for the gear. In order to create a radially flexible bearing for the shaft of the gear, which movable bearing enables quiet operation for the entire service life of the gear, the outer ring or the bush is held by at least one support element that is inserted in a gap between the receiving element and the outer ring, and that is made of a material with elastomer behavior.

The invention provides a live broadcast system capable of obtaining high definition images immediately based on voice control. The system comprises an upper computer side, a lower computer side, a server side and a user side. The upper computer side comprises a mobile bearing device on which a holder, an image collection device and a first transmission module are set. The image collection device comprises one or more camera modules. The lower computer side comprises a remote control device, a second transmission module and a voice module. According to the system provided by the invention, twocameras of each camera module output image data and video data with approximately consistent visual angles and time corresponding relationships. Dual-data stream output satisfies a demand of a user for photographing the high definition images when the user watches a video. When live broadcast is watched, the user sends voice or non-voice control information, a server obtains corresponding voices and forwards the voices to a ground worker, and the ground worker is instructed to carry out corresponding remote control operation to control the mobile bearing device and / or the holder, so watching visual angles of the user are changed, and the entertainment interactivity of the user is improved.

The invention relates to a shifting device for operating a clutch with clutch axial line, especially a clutch in a motor vehicle drive unit between a combustion engine and a gear-shifting transmission. The shifting device comprises a shifting lever is rotatably supported at a rotation point relative to radial movement of clutch axial line between an external bearing and internal bearing of the shifting lever and on a mobile bearing seat fixed on a axial direction and moving along the radial direction and the external bearing is elastically mounted with a spring and the internal bearing cooperates with a shifting bearing and moved to a shifting path. The terminal position lies on the mobile conversion stop position when the clutch is at disconnection state and better reset of the bearing block is realized in the clutch. A path of the external bearing is limited in an effective direction of the spring by a stop such that a force is exerted on a bearing block at the rotary point by the shifting lever and the force is suitable for shifting the bearing block in a direction of the external bearing.

A mobile bearing platform is a mobile platform based on an air cushion bearing technology. Four or more air cushion supporting structures are uniformly distributed at the bottom of a bearing frame and are controlled by a control system. Motion of the platform is implemented through a main driving wheel, an orientation wheel, an auxiliary driving wheel and a turning mechanism which are arranged on a center line at the bottom of the bearing frame. The mobile bearing platform is scientific and reasonable in design and stable in performance, not only can walk linearly and turn a corner, but also has functions of moving laterally and rotating in situ.

The invention relates to a mobile bearing assembly having a non-planar interface, specifically provides a unicompartmental mobile tibial assembly which includes a tibial tray and a tibial insert. The tibial tray includes an upper surface and a bottom surface configured to contact a portion of a surgically-prepared surface of the proximal end of a tibia. The tibial insert includes an upper bearing surface configured to contact a surgically-prepared surface of the distal end of a femur and a bottom bearing surface configured to contact the upper surface of the tibial tray when the tibial insert is coupled to the tibial tray. Any one or more of the upper surface of the tibial tray, the bottom surface of the tibial tray, and / or the bottom bearing surface of the tibial insert may be non-planar.

A bearing display device having a terrestrial magnetism sensor measuring terrestrial magnetism, a display section, and a control section for calculating a geographical bearing based on the value measured by the terrestrial magnetism sensor and causing information on the calculated bearing to be displayed on the display section. The control section monitors variation in behavior of an electronic component mounted on the bearing display device and causes the information on the bearing displayed on the display section to be updated depending on the behavior variation.