Howmedica International Inc.

T&n Materials Research Limited

Howmedica Interntional Inc.

Christina Doyle

Alan W Atkinson

Janet M Lancaster

Katryna J Dearden

Kenneth H Marshall

Kay L Robinson

A prosthetic bearing element having a bearing surface is made from an ultra-high molecular weight polyethylene with a molecular weight greater than 1,000,000 with a multi-axially molecular orientation. From tests which have been applied to such material, it has been found that the wear rate is lowered and preferably the direction of one of said axial molecular orientations extends parallel with or along the length of the bearing surface.

Prosthetic polyethylene bearing having enhanced wear properties

A Process is described in which the polymer is passed over a former under hydro-static pressure, which may involve passing the material over a die or series of dies for the purpose of imposing multi-axial expansion to the workpiece. Some of the advantages are increased stiffness and reduction in creep. Improved wear is also found.

Ultra-high molecular weight polyethylene

Graphite gaskets with an improved release characteristic are embossed to form a relief pattern of relatively raised areas surrounded by predominantly interconnected depressions, followed by coating with a silicone rubber.

Gasket and process of making gaskets from exfoliated graphite

Growing community of inventors

Cranleigh, United Kingdom

Christina Doyle