Patent ID: 7557325

Claim:
A method for manufacturing a metal medical needle including the steps of: a) providing a first main needle portion having a first pointed end and a second end whose periphery is contained within a plane P 1 , b) providing a second needle portion of tubular shape of axis X 2 and of which at least a first end has a periphery contained within a plane P 2 substantially perpendicular to axis X 2 , the dimensions of said second needle portion in said plane P 2 being less than or equal to the dimensions of said first portion in said plane P 1 , c) arranging said first and second needle portions end to end, such that said planes P 1 and P 2 merge forming an interface between said two needle portions, d) welding said first and second needle portions via the effect of the impact of an incident pulsed laser beam onto a weld region located at said interface, wherein during step d) a relative rotational movement is induced between said two needle portions and the incident laser beam, the speed of said relative rotational movement and the duration of the laser pulses being adjusted with respect to each other, such that at least one complete relative revolution is completed during the duration of one laser beam pulse, and wherein said rotational movement of said incident laser beam is achieved by implementing an optical device comprising a rotating reflective surface and an annular reflective surface, said laser beam being first incident on said rotating reflective surface which deviates the laser beam in the direction of said annular reflective surface, this annular reflective surface then reflecting said incident laser beam in the direction of said interface between said two needle portions.