CHAMBER HATCH LOCK Russian patent published in 2013 - IPC F16J13/00 

FIELD: machine building.

SUBSTANCE: chamber hatch lock comprises a cover tightly installed on the chamber hatch and having a deep entrance part and connected with a device of its removal installed outside the chamber. The device of cover removal is made in the form of a movable hinged joint installed as capable of displacement along the axis of the chamber and attached by means of fastening elements with a suspended part to the outer surface of the cover, and with a support part - to the chamber. In the suspended part of the hinged joint there is a through longitudinal guide slot, where a hinged joint finger is installed. At both ends of the slot there are coaxial threaded through holes for clamping and puller bolts. The length of the slot and the threaded part of each clamping and puller bolt is not less than the depth of the entrance part of the cover. The removal device is equipped with a stop bolt, installed across the slot with a distance from its edge for the value of the hinged joint finger diameter.

EFFECT: simplified maintenance of a chamber under restricted dimensional conditions of works without use of special weight-lifting equipment.

2 dwg