Title:
CORE DRILL FOR IMPROVEMENT AND REINFORCEMENT WORK FOR RAILROAD GROUND, SLOPE AND RETAINING WALL
Document Type and Number:
Japanese Patent JP2017193933
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a small-sized and weight-reduced core drill for excavation, which can be utilized even in a small space during improvement and reinforcement work for railroad ground, a slope or a retaining wall, which can also be used for detailed work, and which has a low noise level.SOLUTION: Dimensions of an ultrahard sintered metal chip for being installed at the tip of a core drill are reduced to avoid a conventionally-executed fracture of gravel in soil, and its upper part assumes an arch shape. This enables miniaturization and weight reduction, and enables a marked reduction in noise generation during execution of work.SELECTED DRAWING: Figure 1
Inventors:
SAITO SATOSHI
Application Number:
JP2016094123A
Publication Date:
October 26, 2017
Filing Date:
April 18, 2016
Export Citation:
Assignee:
SAITO SATOSHI
International Classes:
E21B10/02; E02D17/20; E21B6/00
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