초록 ▼

A hairpin tube receiver includes a plurality of inependently rotatable receiver posts which have cavities in their upper ends for receiving the bends of hairpin tubes. The receiver posts can be independently rotated to selectable positions in order that the hairpin tube receiver can support the bend

A hairpin tube receiver includes a plurality of inependently rotatable receiver posts which have cavities in their upper ends for receiving the bends of hairpin tubes. The receiver posts can be independently rotated to selectable positions in order that the hairpin tube receiver can support the bends of hairpin tubes which are arranged in a variety of different configurations.

대표청구항 ▼

In a mechanical tube expander for expanding hairpin tubes into interlocked relationship with fins, comprising a frame, means for holding on said frame an assembly of fins loosely stacked on hairpin tubes, a receiver mounted on said frame and adapted for supporting the bent portions of said hairpin t

In a mechanical tube expander for expanding hairpin tubes into interlocked relationship with fins, comprising a frame, means for holding on said frame an assembly of fins loosely stacked on hairpin tubes, a receiver mounted on said frame and adapted for supporting the bent portions of said hairpin tubes, a pressure plate carrying a plurality of expander rods which are aligned with the tubes, said expander rods having tube-expanding means at one end thereof and means for reciprocating said expander rods with respect to said assembly in order to expand the tubes into interlocked relationship with the fins that are stacked thereon, the improvement which comprises: said receiver comprises base means; a plurality of upright, elongated, parallel, adjacent receiver posts extending upwardly from said base means, each of said receiver posts having a cavity in its upper end for receiving a portion of the hairpin bend of a hairpin tube; means supporting each of said receiver posts for individual rotation with respect to said base means about the longitudinal axis thereof; detent means acting between said base means and said receiver posts for releasably locking each of said receiver posts in one of a plurality of circumferentially spaced-apart positions whereby the pattern of the cavities in the upper ends of said receiver posts can be changed by individually rotating said receiver posts.