Patent ID: 6367962
Filing Date: 2002-04-09
Classification: A61B,B01F

Abstract:
A kneading device adapted for preparing calcium phosphate-based cement, said device comprising: a cylinder, which includes a hollow cylindrical body portion and a nozzle formed at a distal end of said cylindrical body portion; a plug including an axial through-hole slidably disposed within a proximal end of said cylindrical body portion; a piston assembly which includes a shaft extending through said through-hole of said plug for axial and rotatable movement, a kneading element at the distal end of said shaft within said cylindrical body portion and a handle formed at the proximal end of said shaft portion; a cover member attached to and forming a closure for said nozzle; and a stop member at the proximal end of said cylindrical body portion for fixing the plug within the cylinder at a predetermined position during a kneading operation,wherein an outer surface of said plug has a groove formed therein, said device including an O-ring of an elastomeric material located within said groove thereby to form a seal between said outer surface of said plug and an interior of said hollow cylindrical body portion.