TIGHTENING MEMBER, COMPOSITION OF PAINT FOR THE MEMBER, AND TIGHTENING DEVICE

WIPO Patent Application WO/2002/040608

A1

A method of providing a tightening device, comprising the steps of dissolving natural resin in liquid grease and uniformly mixing phosphoric acid based extreme-pressure additive into the dissolved mixture, applying paint composition onto a high tensile hexagon head bolt (2) and a hexagon head nut (3), removing and drying the excess amount of the composition by a centrifugal separation to easily form a film in a short time, and threading the film-formed high tensile hexagon head bolt (2) and the hexagon head nut (3) with each other for tightening to allow the phosphoric acid-based extreme-pressure additive to react to the metals on the surfaces of the high tensile hexagon head bolt (2) and the hexagon head nut (3) with the heat and pressure produced at the time of tightening so as to bind the additive therewith in the shape of film, whereby a coefficient of friction is reduced regardless of the smoothness of the surfaces of the high tensile hexagon head bolt (2) and the hexagon head nut (3), and a stable connection state can be provided easily since a stable torque-axial force relation can be provided by a stable low coefficient of friction.

TAKEZAWA HIKARU (JP)

PCT/JP2001/009724

May 23, 2002

November 07, 2001

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MEIRA KABUSHIKI KAISHA (JP)
TAKEZAWA HIKARU (JP)

B05D5/08; B05D7/14; C09D191/00; C09D193/00; C10M137/04; C10M163/00; F16B33/00; F16B33/06; F16B39/22; F16B1/00; (IPC1-7): C09D191/00; C09D5/00; C09D101/02; C09D103/02; C09D105/00; C09D193/00; C10M159/02; C10M137/02; F16B33/06

JPS54139643A	1979-10-30
JPS49112061A	1974-10-25
JPS5239057A	1977-03-26
JPS5281462A	1977-07-07
US3814156A	1974-06-04

Kabasawa, Joo (Shinjuku 3-chome Shinjuku-ku, Tokyo, JP)

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