Abstract: A knee joint prosthesis assembly including a femoral component and a unitary tibial component. The femoral component includes a first condyle and a second condyle. The unitary tibial component includes an engaging structure configured to rigidly secure a stationary bearing thereto. The stationary bearing is configured to articulate with the first condyle. The unitary tibial component further includes a planar tibial bearing surface configured to slidably support a mobile bearing thereon. The mobile bearing includes an inferior planar surface configured to slide along the planar tibial bearing surface and a superior surface configured to articulate with the second condyle.

Abstract: A knee joint prosthesis assembly according to the present disclosure can include a femoral component, a unitary tibial component, a medial bearing, and a lateral bearing. The femoral component can have a medial and a lateral condyle portion connected by a patellar track portion. The femoral component can form an opening between the medial and lateral condyles. The unitary tibial component can have a medial portion that includes a first posterior engagement lip and a first outer securing lip. The tibial component can further include a lateral portion that includes a second posterior engagement lip and a second outer securing lip. The medial bearing can have a first posterior groove formed thereon that selectively engages the first posterior engagement lip and a first outer groove that selectively engages the first outer securing lip.

Abstract: A knee joint prosthesis assembly can include a femoral component that has a medial and a lateral condyle portion connected by a patellar track portion. The femoral component can form an opening between the medial and lateral condyles. A tibial component can have a medial portion that includes a first engagement structure and a lateral portion that includes a second engagement structure. A medial bearing can have a third engagement structure formed thereon that selectively engages the first engagement structure. A lateral bearing separately formed and independent from the medial bearing can have a fourth engagement structure formed thereon that selectively engages the second engagement structure.

Abstract: A knee joint prosthesis assembly according to the present disclosure can include a femoral component, a unitary tibial component, a medial bearing, and a lateral bearing. The femoral component can have a medial and a lateral condyle portion connected by a patellar track portion. The femoral component can form an opening between the medial and lateral condyles. The unitary tibial component can have a medial portion that includes a first posterior engagement lip and a first outer securing lip. The tibial component can further include a lateral portion that includes a second posterior engagement lip and a second outer securing lip. The medial bearing can have a first posterior groove formed thereon that selectively engages the first posterior engagement lip and a first outer groove that selectively engages the first outer securing lip.

Abstract: A knee joint prosthesis assembly can include a femoral component that has a medial and a lateral condyle portion connected by a patellar track portion. The femoral component can form an opening between the medial and lateral condyles. A tibial component can have a medial portion that includes a first engagement structure and a lateral portion that includes a second engagement structure. A medial bearing can have a third engagement structure formed thereon that selectively engages the first engagement structure. A lateral bearing separately formed and independent from the medial bearing can have a fourth engagement structure formed thereon that selectively engages the second engagement structure.

Abstract: A knee joint prosthesis assembly can include a femoral component that has a medial and a lateral condyle portion connected by a patellar track portion. The femoral component can form an opening between the medial and lateral condyles. A tibial component can have a medial portion that includes a first engagement structure and a lateral portion that includes a second engagement structure. A medial bearing can have a third engagement structure formed thereon that selectively engages the first engagement structure. A lateral bearing separately formed and independent from the medial bearing can have a fourth engagement structure formed thereon that selectively engages the second engagement structure.

Abstract: A prosthetic component assembly, such as an acetabular cup, includes a shell and a bearing insert or liner. The shell and bearing insert are configured to provide an increased congruency between the shell and the bearing insert thereby decreasing the amount of motion (i.e. micromotion) between the shell and the bearing insert. In one form, increased congruency is achieved through first and second (inner and outer) tapers that are respectively provided on the shell and the bearing insert. The outer taper has first and second outer taper portions. A relationship between the first outer taper portion and the inner provides an essentially congruent fit, while a relationship between the second taper portion and the inner taper provides an interference fit. The relationships between the inner and outer tapers allow the bearing insert to achieve load sharing at a dome of the outer shell as well as at a rim of the shell.

Abstract: A prosthetic device, such as an acetabular cup, includes a shell, a liner and a bearing. The bearing may be coupled to the liner so as to form a bearing-liner subassembly. The shell is provided with a female taper complimentary to a male taper on the liner. The liner-bearing subassembly may be secured to the shell by engaging the complimentary tapers.

Abstract: A prosthetic component assembly, such as an acetabular cup, includes a shell and a bearing insert or liner. The shell and bearing insert are configured to provide an increased congruency between the shell and the bearing insert thereby decreasing the amount of motion (i.e. micromotion) between the shell and the bearing insert. In one form, increased congruency is achieved through first and second (inner and outer) tapers that are respectively provided on the shell and the bearing insert. The outer taper has first and second outer taper portions. A relationship between the first outer taper portion and the inner provides an essentially congruent fit, while a relationship between the second taper portion and the inner taper provides an interference fit. The relationships between the inner and outer tapers allow the bearing insert to achieve load sharing at a dome of the outer shell as well as at a rim of the shell.

Abstract: A prosthetic device, such as an acetabular cup, includes a shell, a liner and a bearing. The bearing may be coupled to the liner so as to form a bearing-liner subassembly. The shell is provided with a female taper complimentary to a male taper on the liner. The liner-bearing subassembly may be secured to the shell by engaging the complimentary tapers.

Abstract: A wood chip sorter comprises a shell (22) which at least partially defines a substantially cylindrical sorting chamber (26) into which wood chips are introduced. The shell (22) has a plurality of rotatable shafts (28) mounted thereon with the axes (72) of the shafts (28) being circularly arranged about a central axis (24) of the shell (22). Each shaft (28) has a plurality of discs (80) mounted at spaced intervals thereon with discs of adjacent shafts (28) intermeshing radially to form essentially axial spaces (84) therebetween. A drive and transmission system (30) revolve the shell (22) about the central axis (24) of the shell (22). A planetary gear system (32) facilitates rotation of the shafts (28) about their axes (72) as the shell (22) revolves. The discs (80) are shaped to have greatest axial width at central portions thereof, and taper to a lesser axial width at their circumference. The discs (80) are formed from an abrasion-resistant material.