Apparatus for collapsing steam tubes for removal from a steam bo

Details Apparatus for collapsing steam tubes for removal from a steam bo Apparatus for collapsing steam tubes for removal from a steam bo

1978-03-02

1980-01-01

Larson, Lowell A.

Metal working

Means to assemble or disassemble

Heat exchanger

29261, 72402, B21D 4104

Patent

active

041809033

ABSTRACT:
Apparatus for collapsing steam tubes for removal from a steam boiler includes a plurality of gripping arms for engaging the end of a steam tube in the wall of a steam boiler. The arms are mounted about a central axis for pivotal movement of the distal ends thereof toward and away from the steam tube. The tube is engaged by gripping fingers at the distal end of the arms for engaging the steam tube between the wall of the boiler and the flared end of the tube. The arms are pivoted inwardly toward the central axis by the camming action of a plate through which the arms extend. The plate bears against the arms and cams them toward the central axis. The plate is moved by an actuator mounted on a fluid driven piston within a cylinder.

REFERENCES:
patent: 579214 (1897-03-01), Adams
patent: 1393026 (1921-10-01), Kepler
patent: 3073374 (1963-01-01), Valente
patent: 3603132 (1971-09-01), Holmes
patent: 3835520 (1974-09-01), Sismore

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