Electricity: conductors and insulators – Boxes and housings – Hermetic sealed envelope type
Patent
1995-09-26
1998-05-12
Ledynh, Bot L.
Electricity: conductors and insulators
Boxes and housings
Hermetic sealed envelope type
220 38, H02G 308
Patent
active
057509247
ABSTRACT:
An electronics and instrumentation enclosure includes a lower portion (4) and a cover (1), which have corner turrets (6 and 3, respectively) provided with through openings (5 and 2, respectively). The cover (1) can be locked to the lower portion (4). Upper locking device includes a locking member (7, 9) having a locking element (19, 20) and lower locking device includes a locking slot (21, 22) for receiving the locking element (19, 20). In a locked position, the locking element (19, 20) is kept in the locking slot (21, 22) by means of a spring element (8). When the lock is in an open position, the cover (1) can be lifted apart from the lower portion (4), whereby a locking member (7, 9) is also detached from a locking ring (16). For the purpose that the locking devices would not suppose the structure of the lower portion (4) of the enclosure to be different from the conventional structure and that existing mould tools and existing enclosure structures could be utilized, the locking slot (21, 22) is formed in a locking ring (16) mounted in the corner turret (6) of the lower portion (4) of the enclosure by ultrasonic welding or glueing and provided with a through opening (28). Alternatively, the locking ring can be turned into the threads of the corner turret and locked in its place by means of an expansion member.
REFERENCES:
patent: 4291817 (1981-09-01), Spitzer et al.
patent: 4551999 (1985-11-01), Guiler
patent: 5056764 (1991-10-01), Mochizuki
patent: 5419626 (1995-05-01), Crockett
Ropponen Matti
Sonntag John-Erik
Fibox Oy AB
Ledynh Bot L.
Patel Dhiru R.
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