Patent ID: 8074337

Claim:
A metal plate member fixation device installation method, comprising the steps of: (a) preparing a barrel that comprises a top coupling flange, a bottom mounting unit having a radially extended bottom bonding flange and an axially extended bottom extension tube, a stepped axial hole and a step defined in said stepped axial hole, and then starting the installation operation; (b) inserting the bottom extension tube of said bottom mounting unit of said barrel into a mounting through hole of a first one of two metal plate members to be affixed; (c) abutting the bottom bonding flange of said bottom mounting unit of said barrel to a solder material on said first metal plate member around said mounting through hole and then applying a reflow soldering process to bond the bottom bonding flange of said barrel to said first metal plate member in a reflow oven; (d) providing a screw member that comprises a head, a shank perpendicularly extended from the center of the bottom wall of said head, a thread spirally extending around the periphery of said shank, a shoulder connected between the bottom wall of said head and said shank and a cap that comprises a center opening axially extending through the top and bottom sides; (e) coupling said screw member and said cap together; (f) preparing a spring member and sleeving said spring member onto the shank of said screw member, and then inserting said screw member and said spring member into the stepped axial hole of said barrel at said first metal plate member; (g) coupling said cap to said barrel to let said spring member be stopped between the step in the stepped axial hole of said barrel and a part of the shoulder of said screw member; and (h) releasing the pressure from said cap for enabling said spring member to push said screw member in direction away from said barrel to further have the lowest end of said cap be stopped at the top end of said barrel.