Patent ID: 8118074
Filing Date: 2012-02-21
Classification: B23K,Y10T

Abstract:
1. An apparatus, comprising: a base plate having a plurality of holes in an array, each of the holes being delimited by an internal thread and a counterbore; a plurality of captive plungers corresponding to the array of holes, each of the plurality of captive plungers being configured to be received within a compressible spring such that the compressible spring wraps around the captive plunger, a combination of the plunger and the spring to interact with the plurality of holes in such a way that allows each of the plurality of captive plungers to vertically move within confines of each of the plurality of holes corresponding to the each of the plurality of captive plungers; and a fastening device to apply a force to bond at least two parts placed on top of each other with a bonding material in between, the force to be applied to the at least two parts to press the base plate against the at least two parts such that the force delivered through the plurality of captive plungers to the at least two parts is concentrated to the array, wherein the each of the plurality of captive plungers includes an external thread that is configured to screw past the internal thread of the each of the holes to be received within the counterbore when the force is applied through the fastening device such that the each of the plurality of captive plungers is held captive within confines of the counterbore of the each of the holes, a major diameter of the external thread being smaller than an inner diameter of the counterbore and larger than a minor diameter of the internal thread to enable retention of the external thread within the confines of the counterbore.