MANHOLE Russian patent published in 2014 - IPC E03F5/02 E05B65/00 

FIELD: construction.

SUBSTANCE: invention relates to fields of business activities, where manholes are used, in particular, in sewage systems. The manhole comprises a body (1), a cover (2) and a stop device. The stop device is made in the form of a threaded pin (3) of irregular shape with a secret element for anti-vandal protection of the manhole, providing for assembly-disassembly of the stop device with the help of a tool comprising hook-shaped elements. The pin (3) is equipped with an internal axial through hole (4) and a stop collar (6), placed on the external diameter of the pin (3). One end of the pin (3) on the thread in the dead hole is connected with the cover (2) of the manhole. The other threaded end of the pin (3) is installed with a clearance in the body (1) of the manhole with the possibility of side and longitudinal displacement and is equipped with a limiting device (7) of axial displacement of a pin, comprising standard fastening elements. The secret element is made in the form of a through hole (5) in the pin (3) and is arranged perpendicularly to the axial line of the pin (3). Hook-shaped elements of the tool are made as capable of insertion into the inner axial through hole (4) of the pin (3) and placement of their ends in the through hole (5) of the secret element. In the cover (2) of the manhole coaxially with an inner axial hole (4) of the pin (3), and there is a through hole (11) made as equal to it by diameter.

EFFECT: invention provides for increased reliability of a manhole and secrecy of a stop device.

3 cl, 3 dwg