"Method For Inspecting Bolts"

Abstract: A testing method for the bolt to be used under the conditions of excessive wind force by which bolts made of Cr-Mo steel can be separated into a group of bolts usable in cold areas and a group of bolts unusable in cold areas without conducting Charpy impact test involving complicated operation, specifically, a testing method for determining whether bolts made of heat-treated Cr-Mo steel are usable or unusable in cold areas, wherein the determination is conducted on the basis of both J parameter calculated by formula: J = (Si% + Mn%) (P% + Sn%) 104 (wherein P%, Si%, Mn% and Sn% are contents (mass%) of phosphorus (P), silicon (Si), manganese (Mn) and tin (Sn) respectively as disclosed in the inspection certificate of the Cr-Mo steel) and bolt diameter.

Patent Information

Application #

Filing Date

24 December 2010

Publication Number

10/2012

Publication Type

INA

Invention Field

PHYSICS

Status

Email

Parent Application

Applicants

MITSUBISHI HEAVY INDUSTRIES, LTD.

16-5, KONAN 2-CHOME, MINATO-KU, TOKYO 1088215, JAPAN

Inventors

1. SHIN NAKAYAMA

C/O NAGASAKI RESEARCH & DEVELOPMENT CENTER, MITSUBISHI HEAVY INDUSTRIES, LTD., 717-1, FUKAHORI-MACHI, 5-CHOME, NAGASAKI-SHI, NAGASAKI 8150392, JAPAN

2. MASUO TADA

C/O NAGASAKI RESEARCH & DEVELOPMENT CENTER, MITSUBISHI HEAVY INDUSTRIES, LTD., 717-1, FUKAHORI-MACHI, 5-CHOME, NAGASAKI-SHI, NAGASAKI 8150392, JAPAN

3. TOMOHIRO NUMAJIRI

C/O NAGASAKI SHIPYARD & MACHINERY WORKS, MITSUBISHI HEAVY INDUSTRIES, LTD., 1-1, AKUNOURA-MACHI, NAGASAKI-SHI, NAGASAKI 8508610, JAPAN

Specification

Documents

Application Documents

#	Name	Date
1	9206-DELNP-2010-Form-3-(25-02-2011).pdf	2011-02-25
2	9206-DELNP-2010-Form-1-(25-02-2011).pdf	2011-02-25
3	9206-DELNP-2010-Correspondence-Others-(25-02-2011).pdf	2011-02-25
4	9206-DELNP-2010-GPA-(18-03-2011).pdf	2011-03-18
5	9206-DELNP-2010-Correspondence-Others-(18-03-2011).pdf	2011-03-18
6	9206-delnp-2010-form-5.pdf	2011-08-20
7	9206-delnp-2010-form-3.pdf	2011-08-20
8	9206-delnp-2010-form-2.pdf	2011-08-20
9	9206-delnp-2010-form-18.pdf	2011-08-20
10	9206-delnp-2010-form-1.pdf	2011-08-20
11	9206-delnp-2010-drawings.pdf	2011-08-20
12	9206-delnp-2010-description (complete).pdf	2011-08-20
13	9206-delnp-2010-correspondence-others.pdf	2011-08-20
14	9206-delnp-2010-claims.pdf	2011-08-20
15	9206-delnp-2010-abstract.pdf	2011-08-20
16	9206-delnp-2010-Form-3-(05-09-2011).pdf	2011-09-05
17	9206-delnp-2010-Correspondence-Others-(05-09-2011).pdf	2011-09-05
18	9206-DELNP-2010-FER.pdf	2017-04-27
19	9206-DELNP-2010-AbandonedLetter.pdf	2017-11-09

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