Patent ID: 6205632
Filing Date: 2001-03-27
Classification: B21D,F22B,Y10T

Abstract:
A compression tool assembly useful for removing a co-operating, longitudinally gapped, cylindrical wall boiler tube flared-end segment from retention within a power boiler drum wall, and comprising:a rigid tool frame element;a pressurized-fluid actuator subassembly supported by said rigid tool frame element and having an extendible and retractable piston rod;two pairs of opposite and rotatable compression jaw elements pivotally carried by said rigid tool frame element, each said compression jaw element having a jaw operating arm; anda reciprocating cam element connected to said pressurized-fluid actuator for reciprocation in response to extension and retraction of said actuator subassembly piston rod, said cam element having two pairs of opposite sloped cam surfaces that respectively engage said two pairs of opposite and rotatable compression jaw element jaw operating arms, and that cause, in response to operation of said pressurized-fluid actuator subassembly, sequential rotation of said two pairs of opposite and rotatable compression jaw elements to thereby compress the wall of a co-operating, longitudinally gapped, boiler tube flared-end segment into an inwardly-curled cross-section configuration that facilitates boiler tube segment withdrawal from retention within the wall of a power boiler drum.