Self-locking theft-proof manhole cover

The utility model relates to an anti-theft well cover, comprising a well cover and a well ring. The anti-theft well cover is characterized in that the well cover and the well ring are connected and fixed together by a shaft pin whose both ends are fixed and are unable to be disconnected. The anti-th...

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Bibliographic Details
Main Author LU LIANXIN
Format Patent
LanguageEnglish
Published 04.08.1993
Edition5
Subjects
EMBANKMENTS
EXCAVATIONS
FIXED CONSTRUCTIONS
FOUNDATIONS
HYDRAULIC ENGINEERING
SOIL SHIFTING
UNDERGROUND OR UNDERWATER STRUCTURES
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