Metal housing of the "flameproof enclosure" ignition protection

Details Metal housing of the "flameproof enclosure" ignition protection Metal housing of the "flameproof enclosure" ignition protection

1997-08-21

1999-03-09

Reichard, Dean A.

Electricity: conductors and insulators

With fluids or vacuum

Boxes and housings

174 66, H05K 503, H05K 504

Patent

active

058804005

ABSTRACT:
In a metal housing of the "Flameproof Enclosure" ignition protection type, one part of the housing is provided at the parting plane with a rib and the other housing part is provided with a groove complementary thereto. The cross-sectional dimensions of the groove are larger than the cross-sectional dimensions of the rib. The gap-like space obtained thereby is filled with a coating which adheres integrally either to the rib or to the walls of the groove. This gives rise, between the coating and the other part to which it does not adhere integrally, to a gap which meets the requirement placed on an "ex-gap" of a flameproof housing.

REFERENCES:
patent: 3149747 (1964-09-01), Burgess
patent: 3724706 (1973-04-01), Slocum
patent: 3910448 (1975-10-01), Evans et al.
patent: 4632269 (1986-12-01), Rose
patent: 4664281 (1987-05-01), Falk et al.
patent: 4699293 (1987-10-01), Duchrow
patent: 5272279 (1993-12-01), Filshie
patent: 5382752 (1995-01-01), Reyhan et al.
patent: 5522577 (1996-06-01), Roesch
patent: 5621189 (1997-04-01), Dodds

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