Cutlery – Perforating or indenting implements – Pointed
Patent
1984-07-31
1986-07-01
Watts, Douglas D.
Cutlery
Perforating or indenting implements
Pointed
30358, 30360, B26F 100
Patent
active
045971803
ABSTRACT:
A punch tool is disclosed for puncturing the walls of heat exchanger tubes when they become worn in order that the tubes may be repaired. Said tool comprises a hardened, longitudinally drilled, steel rod that is able to fit within the heat exchanger tube. A piston with a cutting bit is fit within a milled slot that communicates with the longitudinally drilled hole of the hardened rod. Once the tool is inserted into a tube to be repaired hydraulic pressure is applied and the piston is forced outward thereby puncturing the tube.
REFERENCES:
patent: 1316145 (1919-09-01), Doyle
patent: 3568657 (1971-03-01), Gue
patent: 4455746 (1984-06-01), Idzik et al.
Chevron Research Company
Keeling E. J.
LaPaglia S. R.
McGarrigle P. L.
Watts Douglas D.
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