Electricity: conductors and insulators – Boxes and housings – Hermetic sealed envelope type
Patent
1979-05-25
1982-06-15
Goldberg, Elliot A.
Electricity: conductors and insulators
Boxes and housings
Hermetic sealed envelope type
277 3, 277171, F16J 1510
Patent
active
043352731
ABSTRACT:
A static junction seal assembly for electrically insulating a high potential between the interior and the exterior of a housing. The housing has first and second halves, having a first seal surface and a second seal surface, respectively. The seal surfaces are covered with a dielectric grease and are juxtaposed with a non-conductive gasket therebetween. The space between the seal surfaces increases from a central location to an edge location and the gasket adjacent the central location has a maximum thickness which decreases continuously from the central location to a gasket edge location when the gasket and seal surfaces are juxtaposed in an uncompressed state. The relative configuration of the first and second seal surfaces and the gasket are thus selected so that as the gasket is progressively compressed between the seal surfaces, a gasket bulge will initially form at the central location and thereafter move from the central location to the edge location. The movement of the gasket bulge displaces and expels the grease and any entrapped air along the seal surface to form a grease filled, bubble free, insulating seal. For sealing an access port through the housing, the port is provided with sides sloped inwardly toward the center of the port at a first angle. A plug having inwardly sloped sides at a second smaller angle is inserted in the port and is compressed thereby progressively forming a plug bulge which moves progressively upward expelling grease and all entrapped air.
REFERENCES:
patent: 1839340 (1932-01-01), Pittlick
patent: 3211478 (1965-10-01), Batzer
patent: 3670092 (1972-06-01), Updyke et al.
patent: 3870322 (1975-03-01), Marshall
patent: 3915461 (1975-10-01), Gautier
patent: 4111330 (1978-09-01), Jordan
Electric Power Research Institute Inc.
Goldberg Elliot A.
Tone D. A.
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