Metal working – Means to assemble or disassemble – Heat exchanger
Patent
1986-01-06
1987-07-14
Goldberg, Howard N.
Metal working
Means to assemble or disassemble
Heat exchanger
29252, 29282, 29400N, 294265, 376463, B23P 1526
Patent
active
046793151
ABSTRACT:
A hydraulic actuator (26) for removing a plug (14) from a tube (12) including tube gripping means (28, 32), the actuator having a double piston arrangement (38, 52), which when energized quickly and efficiently first causes the gripping means to positively grip the plug, and then thereafter remove the plug from the tube, all in one continuous motion.
REFERENCES:
patent: 3791011 (1974-02-01), Keys
patent: 4366617 (1983-01-01), Nanstiel et al.
Combustion Engineering Inc.
Goldberg Howard N.
Mulholland John H.
Wallace Ronald S.
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