Patents by Inventor Satoshi Yamanaka

Satoshi Yamanaka 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).

  • Patent number: 6209879
    Abstract: A sealing apparatus has a metal ring having a cylindrical portion and an inward flange portion bending from the open-air side end of the cylindrical portion radially inward; a first sealing member formed integral with the metal ring, and having a first rubber-like sealing lip, and a flange-shaped interposed portion held between the inward flange position of the metal ring and the radial portion of the first sealing member. A second sealing member made of a resin material, extends from the inside-diameter end of the interposed portion axially toward the sealing liquid side, and is located in a gap between the open-air side surface of the first sealing lip and a rotary member, having the inner periphery thereof in slidable close contact with the surface of the rotary member, and regulates radial deformation of the first sealing lip. A screw pumping portion is provided to transport the liquid between the sliding surfaces to the sealing liquid side on rotation of the rotary member.
    Type: Grant
    Filed: October 23, 1998
    Date of Patent: April 3, 2001
    Assignee: Eagle Industry Co., Ltd.
    Inventors: Koichi Mizunoya, Ken Yoshikawa, Satoshi Yamanaka, Tatuhiko Watanabe, Shinobu Munekata, Yasuhiro Ikeda
  • Patent number: 6199869
    Abstract: A sealing device comprising an annular support structure, a first annular sealing lip made of rubber and supported by the annular support structure, and a second annular sealing lip adjacent to the first annular sealing lip, the second annular sealing lip being made of resin and supported by the annular support structure. The first sealing lip made of rubber is located on the side to be scaled of the second sealing lip made of resin, and grease is held in a space formed by the first and second sealing lips and a shaft.
    Type: Grant
    Filed: June 20, 2000
    Date of Patent: March 13, 2001
    Assignee: Nok Corporation
    Inventors: Hideyuki Furuyama, Kaoru Anzue, Kouichi Mizunoya, Satoshi Yamanaka
  • Patent number: 6182975
    Abstract: The follow-up performance to the operation of a shaft is improved by forming an annular space between a rubber seal lip formed of a rubber-like elastic material and a resin seal lip so as to prevent the resin seal lip from interfering with the rubber seal lip. The follow-up performance to the shaft is further improved by increasing the flexibility of the resin seal lip by forming a plurality of annular grooves parallel to one another to the side surface of the annular gap side of the resin seal lip. A PTFE sheet is inserted as in the form of a flat washer shape into a mold, it is adhesively baked to a first seal member formed of rubber together with the vulcanization formation, a plurality of annular grooves and a helical groove are formed to the PTFE sheet by utilizing a mold clamping pressure, and the PTFE sheet is bent at the mold separation time after the molding process.
    Type: Grant
    Filed: March 7, 1995
    Date of Patent: February 6, 2001
    Assignee: NOK Corporation
    Inventors: Noboru Matsushima, Satoshi Yamanaka
  • Patent number: 6102409
    Abstract: A sealing device including an annular support structure, a first annular sealing lip made of rubber and supported by the annular support structure, and a second annular sealing lip adjacent to the first annular sealing lip, the second annular sealing lip being made of resin and supported by the annular support structure. The first sealing lip made of rubber is located on the side to be sealed of the second sealing lip made of resin, and grease is held in a space formed by the first and second sealing lips and a shaft.
    Type: Grant
    Filed: June 26, 1997
    Date of Patent: August 15, 2000
    Assignee: Nok Corporation
    Inventors: Hideyuki Furuyama, Kaoru Anzue, Kouichi Mizunoya, Satoshi Yamanaka
  • Patent number: 5286738
    Abstract: A triazole compound of the formula (I): ##STR1## and an insecticide comprising the same as the active ingredient.
    Type: Grant
    Filed: November 6, 1991
    Date of Patent: February 15, 1994
    Assignee: S.D.S. Biotech K.K.
    Inventors: Toshiya Kimata, Shunji Hayashi, Satoshi Yamanaka, Sayoko Kawaguchi, Kazuhiro Kojima
  • Patent number: 5208231
    Abstract: A triazole compound having the formula (I): ##STR1## wherein R.sub.1 and R.sub.2 represent a hydrogen atom, a lower alkyl group or a dialkylcarbamoyl group, or R.sub.1 and R.sub.2 may be bonded to form an alkylene group, an oxyalkylene group or a thioalkylene group which may be substituted with a lower alkyl group, R.sub.3 represents a hydrogen atom or CONRR' where R and R' represent an alkyl group, an alkenyl group, an alkynyl group, a cyanoalkyl group or a phenyl group or benzyl group which may be substituted, or R and R' may be bonded to form an alkylene group, an oxyalkylene group or a thioalkylene group which may be substituted with a lower alkyl group; R.sub.4 represents ##STR2## where R.sub.5 represents a hydrogen atom, a lower alkyl group or a phenyl group, R.sub.6 represents a lower alkyl group, or R.sub.5 and R.sub.6 may be bonded to form an alkylene group, with a proviso that R.sub.1 and R.sub.
    Type: Grant
    Filed: April 20, 1992
    Date of Patent: May 4, 1993
    Assignee: S.D.S. Biotech K.K.
    Inventors: Toshiya Kimata, Tetsuo Tsuruya, Shunji Hayashi, Kazuhiro Kojima, Satoshi Yamanaka, Kiyoshi Sakuma
  • Patent number: 5155124
    Abstract: A triazole compound having the formula (I): ##STR1## wherein R.sub.1 and R.sub.2 represent a hydrogen atom, a lower alkyl group or a dialkylcarbamoyl group, or R.sub.1 and R.sub.2 may be bonded to form an alkylene group, an oxyalkylene group or a thioalkylene group which may be substituted with a lower alkyl group, R.sub.3 represents a hydrogen atom or CONRR' where R and R' represent an alkyl group, an alkenyl group, an alkynyl group, a cyanoalkyl group or a phenyl group or benzyl group which may be substituted, or R and R' may be bonded to form an alkylene group, an oxyalkylene group or a thioalkylene group which may be substituted with a lower alkyl group; R.sub.4 represents ##STR2## where R.sub.5 represents a hydrogen atom, a lower alkyl group or a phenyl group, R.sub.6 represents a lower alkyl group, or R.sub.5 and R.sub.6 may be bonded to form an alkylene group, with a proviso that R.sub.1 and R.sub.
    Type: Grant
    Filed: May 25, 1990
    Date of Patent: October 13, 1992
    Assignee: S.D.S. Biotech K.K.
    Inventors: Toshiya Kimata, Tetsuo Tsuruya, Shunji Hayashi, Kazuhiro Kojima, Satoshi Yamanaka, Kiyoshi Sakuma
  • Patent number: 5066657
    Abstract: A crotonic acid amide derivative represented by formula (I): ##STR1## wherein X.sub.1, X.sub.2, X.sub.3, X.sub.4, and X.sub.5, which may be the same or different, each represents a hydrogen atom, a halogen atom, a substituted or unsubstituted lower alkyl group, a substituted or unsubstituted lower alkyl group, a lower haloalkyl group, a lower haloalkoxy group, a nitro group, a substituted or unsubstituted lower alkanesulfonyl group, a substituted or unsubstituted alkanesulfonyloxy group, a substituted or unsubstituted benzenesulfonyl group, a substituted or unsubstituted benzenesulfonyloxy group, a substituted or unsubstituted phenoxy group, a substituted or unsubstituted benzyloxy group, a dialkylamino group, a mono- or di-lower alkanesulfonylamino group, a substituted or unsubstituted lower alkythio group, a --SO.sub.2 R.sub.1 wherein R.sub.1 represents a lower alkyl group or a lower haloalkyl group, a lower alkoxycarbonyloxy group, a substituted or unsubstituted alkoxycarbonyl group, a --CH.dbd.N--OR.sub.
    Type: Grant
    Filed: May 8, 1990
    Date of Patent: November 19, 1991
    Assignee: SDS Biotech K.K.
    Inventors: Shunji Hayashi, Satoshi Yamanaka, Sayoko Kawaguchi, Teruhiko Ishii, Toshiya Kimata, Naoaki Misu
  • Patent number: 4995623
    Abstract: A sealing device for use in contact with a reciprocating member such as a piston rod of an automotive shock absorber has a plurality of seal lips with tips which make resilient sliding contact with the surface of the reciprocating member. Chambers are formed between the tips of adjacent seal lips. The seal lip closest to an internal fluid to be sealed is designed to facilitate flow of the fluid into the chamber between this seal lip and the adjacent seal lip, across the region of contact between this seal lip and the reciprocating member. The design may include notches or grooves formed in the seal lip closest to the seal lip or specific design of tapered surfaces of this seal lip.
    Type: Grant
    Filed: September 9, 1988
    Date of Patent: February 26, 1991
    Assignee: NOK Corporation
    Inventors: Noriyuki Wada, Satoshi Yamanaka