Abstract: An expandable high-pressure flexible tube device for sealing piping in gas or oil fields. The device comprises two end pieces interconnected by a tubular element having an elastomeric material and sheets of coils round about its longitudinal axis at a small angle of about 10.degree. to 15.degree. relative thereto. The sheets comprise strong helical textile cords mutually separated by a predetermined spacing. A sheet having longitudinal textile cords extends over the whole length of the device, the helical cords and longitudinal cords being imbedded in the elastomeric material.

Abstract: A trochlea implant for a femoro-patellar prosthesis, the implant being L-shaped, comprising a trochlea branch and an inter-condyle branch, the posterior face of the implant including a rectangular longitudinal rib designed to be engaged in a groove of corresponding shape machined in the anterior face of the trochlea to improve the stability of the prosthesis.