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...http://www.google.fr/patents/US5880400?utm_source=gb-gplus-shareBrevet US5880400 - Metal housing of the "flameproof enclosure" ignition protection type
Metal housing of the "flameproof enclosure" ignition protection type
