Plug removal apparatus

Details Plug removal apparatus Plug removal apparatus

1987-04-20

1988-12-27

Echols, P. W.

Metal working

Means to assemble or disassemble

Heat exchanger

29234, 294265, 138 89, 138 97, 138 98, 165 112, 376260, B23P 1526

Patent

active

047930560

ABSTRACT:
A plug removal apparatus for removing a mechanical plug fixed in an end of each heat exchange tube of a heat exchanger includes a plug removing mechanism which engages with and pulls out a cylindrical member of the mechanical plug. The plug removing mechanism includes a mandrel insertable into and threadedly engageable with the cylindrical member, a push rod coaxially extending through the mandrel for pushing a cone member of the mechanical plug, an actuating means for selectively moving the mandrel and the push rod towards and from the mechanical plug, and a drive means for selectively rotating the mandrel into engagement with the cylindrical member.

REFERENCES:
patent: 2807079 (1957-09-01), Josephson
patent: 3504420 (1970-04-01), Shores
patent: 4366617 (1983-01-01), Nanstiel et al.
patent: 4406856 (1983-09-01), Wilkins et al.
patent: 4438805 (1984-03-01), Gugel
patent: 4597294 (1986-07-01), Brill, III et al.
patent: 4639994 (1987-02-01), Cooper, Jr. et al.
patent: 4696102 (1987-09-01), Overbay

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