Patents Examined by Terry D. Johnson
  • Patent number: 4803000
    Abstract: 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.
    Type: Grant
    Filed: June 17, 1986
    Date of Patent: February 7, 1989
    Assignee: Hitachi, Ltd.
    Inventors: Takao Uematsu, Hiroshi Suzuki, Shigeki Komatsuzaki, Fumio Nakano