LOCK Russian patent published in 1996 - IPC

FIELD: agriculture. SUBSTANCE: lock has cross-bar one end of which is pivotally connected to a door. The other end is positioned on the carrying member for permitting vertical shifting and contact with pair hooks. The sharp corner of a triangle projection at the free end of the cross-bar faces the hooks. The pair hooks are mutually parallel and have vertical projection-hooks at free ends. The projection-hooks are chamfered to the middle and their sharp corners face toward the interior of the pair hooks to form triangle hollow from the front for interaction with the triangle projection of the cross-bar. The bottom hook is rigidly secured to the support. The top hook is pivotally connected with the support for permitting deflection to the top in the vertical groove of the tubular support and freely lowering after passing the cross-bar under it. EFFECT: enhanced reliability. 1 dwg