Title:
SCREW POINT
Document Type and Number:
Japanese Patent JP2007032274
Kind Code:
A
Abstract:
To provide a screw point hard to be broken and capable of providing accurate test values.
In this screw point used for Sweden type sounding test and tests equivalent to that test, the side face of a drill part 2 is curved to the axis side so as to be deformed. Accordingly, when the screw point 1 is driven in a hard ground including gravel, it has a higher deflection effect more than screw points specified in JIS and has a high resistance against buckling. As a result, the screw point is hard to be broken.
More Like This:
Inventors:
YASUEDA MASAAKI
Application Number:
JP2006296952A
Publication Date:
February 08, 2007
Filing Date:
October 31, 2006
Export Citation:
Assignee:
NITTO SEIKO KK
International Classes:
E02D1/02; G01N3/40