Patent ID: 7887251

Claim:
An easy-lift manhole assembly comprising a circular frame ( 1 ) with a cup ( 11 ) provided on an end, and a cover ( 2 ) with an arm ( 21 ) which joints said cup ( 11 ) provided on an end thereof, characterized in that: a first bracket ( 12 ) is disposed in an inner wall of the frame ( 1 ) where the cup ( 11 ) is provided, and a second bracket ( 22 ) is provided on a bottom of the cover ( 2 ); a hydraulic device ( 3 ) is provide therebetween and joints with the first and second brackets ( 12 , 22 ) respectively, and a locking mechanism ( 4 ) is disposed on an opposite end of the arm ( 21 ) for sealing the cover ( 2 ) and frame ( 1 ) tightly.