A drag and/or dip finishing machine has at least one workpiece holder for the releasable fastening of the workpieces to be machined and a container, disposed beneath the workpiece holder, for accommodating the grinding and/or polishing granules, wherein the workpiece holder and the container are movable relative to each other in that at least the container is rotationally driven. The container has a chamber, which extends around the whole of the periphery thereof and is fluidically connected to the inside, accommodating the grinding and/or polishing granules, of the container, at least on a lower portion thereof, the chamber being equipped with a liquid discharge unit in order to be able to discharge the machining agent from the chamber in the event of an excess of machining agent in the container.

The present invention provides a uni-compartmental knee joint prosthesis (1) which includes a tibial component (2) and a femoral component (3). The tibial component (2) has a fixation portion (10) adapted to be fixed to an upper end of a prepared tibia (T) in a patient, and a bearing portion (30) presenting an articulation surface (32) formed from a ceramic material, wherein the bearing portion (30) is adapted for movement relative to the fixation portion (10). The femoral component (3) is adapted to be fixed to a lower end of a prepared femur (F) in a patient, and comprises a body portion (50) presenting an articulation surface (56) formed from a ceramic material for engagement with the articulation surface (32) of the tibial component (2). The articulation surfaces (32, 56) of the tibial and femoral components are adapted for essentially congruent engagement over a full range of movement of the prosthesis.

A fluid clean apparatus includes a container that has an opening for loading metal parts therein, and an internal loading platform system that includes a platform that is positioned inside the container, and a lift cylinder that is coupled to the platform and raises up and down the platform.

A vibropeening apparatus comprises a main frame, an enclosure receivable within the main frame, a rotary drive mechanism, and an article to be vibropeened. The enclosure defines an internal volume, the internal volume accommodating a vibropeening bed. The article is positioned within the internal volume, and the rotary drive mechanism is to configured to impart a rotary motion to the enclosure within the main frame.

A method of treating an articular surface of a metal orthopaedic implant includes polishing the surface, blasting the surface with a blast media after the first polishing step and polishing the blasted surface of the metal orthopaedic implant after the blasting step. The blasting step roughens the surface to create a surface skew R.sub.sk/S.sub.sk defined by peaks and valleys. The second polishing step reduces the surface skew to a negative skew R.sub.sk/S.sub.sk and produces an average roughness R.sub.a/S.sub.a that is acceptable. Lubrication at the interface of the treated articular surface and the corresponding bearing articular surface is improved, thereby improving wear resistance. Both polishing steps may be performed by drag finishing the surface through an abrasive media.

A masking tool system includes a first masking body and a second masking body. The first masking body includes a bore passing through a portion of the first masking body and a first sealing element disposed on a first end of the first masking body. The second masking body includes a bore passing through the second masking body and a second sealing element disposed on a first end of the second masking body. The system may also include a rod configured to pass through the bores of the first and second masking bodies and to secure the first and second masking bodies to a metallic article placed therebetween. A diagonal length of the masking tool system induces a wobbling rotation during processing.

Disclosed herein is a plasma-resistant chamber component and a method for manufacturing the same. A plasma-resistant chamber component of a semiconductor processing chamber that generates a plasma environment includes a ceramic article having multiple polished apertures. A roughness of the multiple polished apertures is less than 32 in.

The present invention relates to a knee joint prosthesis having a tibial component and a femoral component. The tibial component includes a fixation portion fixed to an upper end of a prepared tibia and a ceramic bearing portion presenting articulation surface(s). The femoral component is fixed to a lower end of a prepared femur and comprises a ceramic body portion presenting articulation surface(s). The respective articulation surfaces of the tibial and femoral components are configured for essentially congruent engagement over a full range of movement of the prosthesis, and the bearing portion of the tibial component is adapted for movement relative to the fixation portion. Also disclosed is an apparatus and a method for finishing articulation surfaces of ceramic components of a knee joint prosthesis, including the steps of combining the ceramic bearing portion and the ceramic body portion, and imparting relative movement to the bearing portion and/or the body portion.

Disclosed herein are systems and methods for polishing internal surfaces of apertures in semiconductor processing chamber components. A method includes providing a ceramic article having at least one aperture, the ceramic article being a component for a semiconductor processing chamber. The method further includes polishing the at least one aperture based on flowing an abrasive media through the at least one aperture of the ceramic article, the abrasive media including a polymer base and a plurality of abrasive particles.

A fixture assembly includes a frame with a tip rail displaced from a main body. A method of polishing a gas turbine engine component includes restricting a flow of media adjacent to a tip of a component with an airfoil to be generally equal to a flow of media adjacent to a sidewall of the airfoil.