Metal working – Method of mechanical manufacture – Fluid pattern dispersing device making – e.g. – ink jet
Patent
1990-03-05
1992-01-14
Cuda, Irene
Metal working
Method of mechanical manufacture
Fluid pattern dispersing device making, e.g., ink jet
2940209, 2940215, 29523, 29890036, 138 97, 138 98, 165 76, B21D 5300
Patent
active
050798375
ABSTRACT:
A repair lining for a heat exchanger tube includes a sleeve having ends. A tubular basic body is disposed in the sleeve and has ends protruding beyond the ends of the sleeve. One of the ends of the basic body has a top part being supported on the sleeve and the other of the ends of the basic body has a thread formed thereon. A nut is disposed on the thread for bracing the repair lining in the heat exchanger tube. At least one clamping ring is disposed on one of the ends of the basic body between the sleeve and the top part, and at least one clamping ring is disposed on the other of the ends of the basic body between the sleeve and the nut. The clamping rings have a conical shape in an initial relaxed condition being changed into a flattened shape with an enlarged diameter by relative motion between the basic body and the sleeve. A method for repairing a heat exchanger tube with a repair lining includes introducing a repair lining into the heat exchanger tube, and tightening the nut with a tool for axially enlarging the clamping rings and substantially fluid-tightly connecting the basic body to the heat exchanger tube.
REFERENCES:
patent: 4182408 (1980-01-01), Laber
patent: 4283615 (1981-08-01), Vrillon
patent: 4573248 (1986-03-01), Hackett
patent: 4581801 (1986-04-01), Kobuck et al.
patent: 4598738 (1986-07-01), Weber et al.
patent: 4649989 (1987-03-01), Vermaat et al.
patent: 4713870 (1987-12-01), Szalvay
patent: 4724899 (1988-02-01), Frates et al.
Cuda Irene
Greenberg Laurence A.
Lerner Herbert L.
Siemes Aktiengesellschaft
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