IMPROVED PROTECTION DOOR Russian patent published in 1999 - IPC

FIELD: mechanical engineering; protection facilities. SUBSTANCE: improved protection door has protective walls and lock with horizontal pins and vertically movable plates fitted between walls. Plates are mechanically coupled with locking rods arranged one over the other. Door is provided with fixing crossmember and rocking lever. One end of lever is connected with one of vertical rods. opposite end of lever is connected with other vertically movable rod. One of vertically movable plates of lock rests on first end of lever provided with shaped tailpiece. Fixing crossmember is located under opposite end of lever. EFFECT: enhanced repairability and higher serviceability of lock. 3 cl, 4 dwg