Patents by Inventor Takahiro Ozaki

Takahiro Ozaki has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Grease composition for constant velocity joint
    Patent number: 6258760
    Abstract: The present invention relates to a grease composition for a constant velocity joint, which has a low coefficient of friction to decrease the vibrations of CVJ, which comprises a base oil, a urea thickening agent, (A) a molybdenum dialkyldithiocarbamate, (B) at least one molybdenum di(alkyl or aryl)dithiophosphate represented by formula (I): wherein R1 represents a primary or secondary alkyl group or an aryl group, and (C) at least one sulfur-containing additive selected from the group consisting of an ashless dithiocarbamate, a polysulfide, zinc dithiocarbamate, sulfurized fat and oil, an olefin sulfide, a sulfur-phosphorus extreme pressure additive, and a thiadiazole extreme pressure additive, wherein each of the components (A), (B) and (C) is in an amount of 10% by weight or less based on the total weight of the grease composition.
    Type: Grant
    Filed: April 21, 2000
    Date of Patent: July 10, 2001
    Assignees: Showa Shell Sekiyu K.K., NTN Corporation
    Inventors: Takahiro Ozaki, Tsutomu Yoshida, Takao Nishimura, Ryuichi Masumori, Keizo Nagasawa, Yukio Asahara
  • Lubricating grease composition
    Patent number: 5624889
    Abstract: A lubricating grease composition includes a grease containing a base oil and a thickening agent consisting of a mixture of tricalcium phosphate represented by the formulaCa.sub.3 (PO.sub.4).sub.2and a urea compound and, incorporated as additives in the grease, (A) a sulfurized molybdenum dialkyldithiocarbamate represented by the formula ##STR1## wherein R.sup.1 and R.sup.
    Type: Grant
    Filed: November 30, 1995
    Date of Patent: April 29, 1997
    Assignee: Showa Shell Sekiyu K.K.
    Inventors: Takahiro Ozaki, Tomoo Munakata, Yasushi Kawamura, Kazunori Takase, Tetsuo Tsuchiya
  • Grease composition for tripod type constant velocity joint
    Patent number: 5585336
    Abstract: A grease composition for a tripod type constant velocity joint, which includes a base oil, a urea compound as a thickening agent, and not more than 10% by weight of at least one of (A) a molybdenum dialkyldithiocarbamate and (B) a molybdenum dialkyldithiophosphate or diaryldithiophosphate, in which the base oil has a kinematic viscosity of from 3.0 to 7.5 mm.sup.2 /sec at 100.degree. C. The grease composition applied to a tripod type constant velocity joint reduces the induced thrust force and thereby suppresses vibration, such as a shudder of a car body upon starting off and acceleration.
    Type: Grant
    Filed: October 5, 1995
    Date of Patent: December 17, 1996
    Assignees: Showa Shell Sekiyu K.K., NTN Corporation
    Inventors: Takahiro Ozaki, Fumio Goto, Yasushi Kawamura, Tomoo Munakata, Tetsuo Tsuchiya, Toshiharu Kato, Shin Tomogami, Shinichi Takabe
  • Grease composition for constant velocity joint
    Patent number: 5487837
    Abstract: A grease composition comprising a grease containing, in a base oil thereof, from 2 to 40% by weight, based on the total composition, of tricalcium phosphate [Ca.sub.3 (PO.sub.4).sub.2 ], the grease further containing (A) from 0.5 to 10% by weight, based on the total composition, of a molybdenum dialkyldithiocarbamate sulfide and (B) from 0.1 to 5% by weight, based on the total composition, of at least one of a zinc dialkyldithiophosphate and triphenyl phosphorothionate. The grease composition is excellent in mechanical stability, heat resistance, extreme pressure properties, and wear resistance.
    Type: Grant
    Filed: December 29, 1994
    Date of Patent: January 30, 1996
    Assignee: Showa Shell Sekiyu K. K.
    Inventors: Takahiro Ozaki, Tomoo Munakata, Fumio Goto, Tetsuo Tsuchiya
  • Urea grease compostition
    Patent number: 5449471
    Abstract: A urea grease composition is disclosed, which comprises a urea grease and, incorporated therein as additives, a sulfurized molybdenum dialkyldithiocarbamate represented by formula (A): ##STR1## wherein R.sub.1 and R.sub.
    Type: Grant
    Filed: May 25, 1994
    Date of Patent: September 12, 1995
    Assignees: Showa Shell Seikyu K.K., Toyota Jidosha Kabushiki Kaisha
    Inventors: Takahiro Ozaki, Yasushi Kawamura, Tetsuo Tsuchiya, Fumio Goto, Hideaki Tsuyuki, Kazuhiro Miyajima, Takashi Matsuda, Nobuhiko Okano, Hirofumi Mochizuki