Hitachi, Ltd.

Takao Uematsu

Shigeki Komatsuzaki

Fumio Nakano

Yutaka Ito

Hiroshi Suzuki

Tomoe Takamura

Takahiro Daikoku

Koji Sato

Toshikazu Narahara

Takayuki Nakakawaji

Shizuo Zushi

Seikichi Tanno

Akio Idei

Atsushi Morihara

Mitsuyoshi Shoji

Tomio Yoshida

Akihiro Yasuda

Hiroshi Go

Jun Matsubayashi

Yoshiharu Honma

Ran Ito

There are provided a highly thermal conductive grease composition having both a thermal conductivity and a satisfactory dispense property, and a cooling device applied with same. The grease composition comprises from 70 to 90% by volume of an inorganic powder which is a mixture containing at least two kinds of inorganic powders different from each other in each average particle size, and from 10 to 30% by volume of a base oil containing a mineral oil or a synthetic oil, the base oil further containing a surfactant in an amount of from 0.2 to 2.0% by weight based on the weight of the inorganic powder.

Highly thermal conductive grease composition and cooling device using the same

Disclosed are an apparatus having sliding parts and a compound for preventing diffusion or separation of a base oil; and a compound for preventing diffusion or separation of the base oil used for the apparatus: an electronic or electric appliance using a joul heat generating source, means for taking out joul heat to the outside by sliding with said heat generating source, and heat conducting compound intervenient between said heat taking out means and heat generating source; and the heat conducting compound used for the appliance.

Apparatus equipped with a cooling block unit having sliding parts and a

A lubricating composition comprising (A) at least one member selected from (a) a polyoxyalkylene alkyl ether phosphate diester, (b) a polyoxyalkylene alkylphenyl ether phosphate diester and (c) a phosphonate ester, in an amount of 3% by weight or more, (B) an N,N'-ethylenebis acid amide having an average particle size of 1 .mu.m or more in an amount of 2 to 15% by weight, and if necessary (C) a lubricating oil having a viscosity of 5 mm.sup.2 /s or more ('.degree. C.) is suitable for cold plastic working of aluminum alloys, particularly age-hardening type aluminum alloys, at the reduction of area of 35% or more.

Lubricant for cold plastic working of aluminum alloys

A substantially water-free, emulsion type liquid lubricant for metal forming which comprises:

Emulsion type liquid lubricant for metal forming, process for preparing

A substantially water-free, liquid lubricant for metal forming, which comprises a lubricating oil, and at least one of linearly condensed phosphorus compounds represented by the following general formula (1):

Lubricant for metal forming and process for metal forming

A lubricating composition comprising (a) a lubricating oil, (b) at least one phosphite ester of pentaerythritol, and (c) at least one compound selected from phosphate monoesters and diesters and phosphonates is suitable for metal forming, particularly for plastic working of aluminum and aluminum alloy with excellent formability and heat resistance.

Lubricant for plastic working of metals

A friction material made of a molded cork, a friction surface of which is covered with a liquid or semi-solid lubricant layer including a solid lubricant layer comprising a solid lubricant having a larger particle size and a solid lubricant having a smaller particle size and filling vacant spaces between the larger-sized solid lubricant in dense form, affords a long service life when used in a power controlling apparatus which can transmit power and/or change rotation speed by applying friction and using a friction material.

Power controlling apparatus using friction material

Growing community of inventors

Hitachi, Japan

Takao Uematsu