DEVICE FOR EXTRACTING LID RECEIVING OF MANHOLE

PROBLEM TO BE SOLVED: To engage a pulling-up claw with a lid receiving frame by avoiding an obstacle even when there is the obstacle in an inner peripheral part of the lid receiving frame. SOLUTION: A plurality of driving cylinders 20 for driving the pulling-up claw are radially arranged, and the dr...

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Bibliographic Details
Main Authors HATANO SHIRO, MIYAMA HIROAKI
Format Patent
LanguageEnglish
Published 20.06.2003
Edition7
Subjects
EMBANKMENTS
EXCAVATIONS
FIXED CONSTRUCTIONS
FOUNDATIONS
HYDRAULIC ENGINEERING
SOIL SHIFTING
UNDERGROUND OR UNDERWATER STRUCTURES
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Summary:PROBLEM TO BE SOLVED: To engage a pulling-up claw with a lid receiving frame by avoiding an obstacle even when there is the obstacle in an inner peripheral part of the lid receiving frame. SOLUTION: A plurality of driving cylinders 20 for driving the pulling-up claw are radially arranged, and the driving cylinders 20 are constituted so that a position can freely be adjusted in the circumferential direction with a radial center position X as the center. COPYRIGHT: (C)2003,JPO
Bibliography:Application Number: JP20010373306