Patent ID: 7328494
Filing Date: 2008-02-12
Classification: B25C,Y10T

Abstract:
1. A method for fixing a driver blade to a piston of a fastener driving tool which comprises: a housing; a cylinder supported to the housing and having an axis providing an axial direction, the piston including a piston body and a boss integrally extending from the piston body in the axial direction, the boss being formed with a groove extending in the axial direction; and a driver blade having a pair of protrusions extending in the axial direction and spaced away from each other by a distance; wherein the method comprises the steps of: positioning the driver blade above the piston body; inserting the driver blade into the groove of the boss so that the protrusions which extend in the axial direction are positioned so as to face an outer surface of the boss which extends in the axial direction in order to form an assembly of the driver blade and the piston; supplying a brazing metal onto boundary positions between the protrusions and the boss; and heating the assembly at a temperature above a melting point of the brazing metal so that molten brazing metal is flowed downwardly into spaces between the boss and the driver blade and the driver blade becomes fixed to the piston by brazing with the brazing metal.