Title:
SCREW POINT
Document Type and Number:
Japanese Patent JP2010047989
Kind Code:
A
Abstract:
To provide a screw point for a Swedish sounding test which surely prevents the breakage of a connecting portion or dropping of the connecting portion from the body of the screw point.
The screw point 1 for the Swedish sounding test includes the body 2 having a plurality of ridges 11 formed on its outer periphery into a spiral shape along the direction of going from a base end 2a toward a front end 2b, and a fixing portion 3 formed integrally on the base end 2a of the body 2 for fixing the body 2 to a rod. The fixing portion 3 is formed as a rolling screw made by rolling machining.
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Inventors:
MAESUMI KESATO
Application Number:
JP2008213488A
Publication Date:
March 04, 2010
Filing Date:
August 22, 2008
Export Citation:
Assignee:
MAEZUMI SEISAKUSHO KK
International Classes:
E02D1/02
Domestic Patent References:
| JPH0953224A | 1997-02-25 | |||
| JPH01174500U | 1989-12-12 | |||
| JP2007107372A | 2007-04-26 | |||
| JP2002155529A | 2002-05-31 |
Attorney, Agent or Firm:
Shinji Sakai