WELL COVER (VERSIONS) Russian patent published in 2011 - IPC E02D29/14 

FIELD: construction.

SUBSTANCE: in a well cover (1 version), a support bush has a circular ledge of a larger size compared to a hole in a board, in the upper part, the support bush is inserted into the board hole so that the lower surface of the bush circular ledge rests against the board at the upper side of the board. In the version 2 of the well cover, hole dimensions in the board on the upper surface of the plate is higher than the one on the lower surface of the board, dimensions of the upper part of the support bush body are larger than the lower part, the support bush body is installed inside the board hole and rests against inner surfaces of the board hole, and in the version 3 - there is thread arranged in the board hole, and there is a thread on the outer surface of the support bush, the bush is screwed into the hole with its threaded part. In all versions the lower surface of the circular ledge of a stop screw has a shape of a spherical segment, and the surface of the bush seat has a shape of a truncated cone, which faces upwards with a larger base, the diameter of the spherical segment is less than the larger base of the truncated cone and is larger than the smaller base of the truncated cone.

EFFECT: increased reliability of underground utilities protection against unauthorised penetration into a control well of underground utilities by means of a cover detachment from the hatch body due to reinforcement of the stop mechanism link with the cover plate, and a stop mechanism with well structures, there are three versions of the well cover.

24 cl, 3 dwg