MANHOLE OF ACCESS HATCH Russian patent published in 1995 - IPC

Abstract RU 2044837 C1

FIELD: civil engineering. SUBSTANCE: manhole of accesss hatch includes body and support projection, lid and locking device, at least three rests placed at the same distance along circumference of the lid have remote from support projection of external conical side surface a curvilinear area. Threaded holes with bolts installed in those are made in the lid on diametral axis. EFFECT: easy in handling. 3 cl, 1 dwg

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RU 2 044 837 C1

Authors

Levkin G.M.

Nefedov N.A.

Nefedov D.N.

Dates

1995-09-27—Published

1991-04-25—Filed