Metal working – Means to assemble or disassemble – Puller or pusher means – contained force multiplying operator
Patent
1974-11-04
1977-04-19
Larson, Lowell A.
Metal working
Means to assemble or disassemble
Puller or pusher means, contained force multiplying operator
176 38, 29424, 29426, 29404, 148 63, 134 4, 134 11, 29401A, 29401C, B23P 1526, B23P 1700
Patent
active
040179524
ABSTRACT:
A sodium-handling apparatus is disassembled and repaired by (1) contacting an inert gas with the sodium-contacting surfaces within the apparatus after discharge of sodium from the apparatus, thereby solidifying the deposited sodium, (2) flushing the inert gas with a reacting gas capable of reacting with sodium, capable of being dissolved in sodium and capable of forming a weak alkali therein, thereby forming a solid film of a neutral salt on surfaces of the deposited sodium by reaction of sodium with the reacting gas, (3) discharging the reacting gas from the apparatus, (4) disassembling and repairing the apparatus in the atmosphere, and then (5) continuing operation of the apparatus while the solid film is being retained on the surfaces of the apparatus.
REFERENCES:
patent: 2487632 (1949-11-01), Bennett
patent: 2784123 (1957-03-01), Rappaport
patent: 2795499 (1957-06-01), Peterson
patent: 2993467 (1958-12-01), Gatti
patent: 3004332 (1961-10-01), Werner
patent: 3066391 (1962-12-01), Vordahl
patent: 3216824 (1965-11-01), Boghen et al.
patent: 3480425 (1969-11-01), Hardy et al.
Naito Kesahiro
Nemoto Kiyomitsu
Sagawa Norihiko
Urata Megumu
Hitachi , Ltd.
Larson Lowell A.
Rising V. K.
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