Electricity: conductors and insulators – Feedthrough or bushing – Compression
Patent
1976-05-17
1977-03-15
Nelson, Peter A.
Electricity: conductors and insulators
Feedthrough or bushing
Compression
176 19R, 174151, G21C 1710
Patent
active
040122824
ABSTRACT:
A reusable multiple lead seal assembly provides leak-free passage of stainless-steel-clad instrument leads through the cover on the primary tank of a liquid-metal-cooled fast-breeder nuclear reactor. The seal isolates radioactive argon cover gas and sodium vapor within the primary tank from the exterior atmosphere and permits reuse of the assembly and the stainless-steel-clad instrument leads. Leads are placed in flutes in a seal body, and a seal shell is then placed around the seal body. Circumferential channels in the body and inner surface of the shell are contiguous and together form a conduit which intersects each of the flutes, placing them in communication with a port through the wall of the seal shell. Liquid silicone rubber sealant is injected into the flutes through the port and conduit; the sealant fills the space in the flutes not occupied by the leads themselves and dries to a rubbery hardness. A nut, threaded onto a portion of the seal body not covered by the seal shell, jacks the body out of the shell and shears the sealant without damage to the body, shell, or leads. The leads may then be removed from the body. The sheared sealant is cleaned from the body, leads, and shell and the assembly may then be reused with the same or different leads.
REFERENCES:
patent: 2827509 (1958-03-01), Wayman
patent: 2877288 (1959-03-01), Bollmeier
patent: 2993082 (1961-07-01), Gainer et al.
patent: 3716450 (1973-02-01), Lions
patent: 3801722 (1974-04-01), Korner
patent: 3913407 (1975-10-01), Hanff et al.
patent: 3922477 (1975-11-01), Glowacz
Hutter Ernest
Pardini John A.
Carlson Dean E.
Churm Arthur A.
Hosteny Joseph N.
Nelson Peter A.
The United States of America as represented by the United States
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