Patents by Inventor Masao Sakamoto

Masao Sakamoto 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: 5885162
    Abstract: A universal joint constituted by a first joint, a second joint and a rolling element. The first joint is formed by friction-welding an outer race member and a connecting shaft member. The connecting shaft member has a ring-shaped connecting portion which is welded with a bottom portion of the outer race member. The connecting portion is formed to project from a recess portion of the connecting shaft member toward the outer race member. Therefore, burr generated by the friction welding between the connecting portion and the bottom surface of the outer race member is received in a space defined by the recess portion and the bottom surface of the outer race member. This facilitates removal of the burr.
    Type: Grant
    Filed: March 6, 1997
    Date of Patent: March 23, 1999
    Assignee: Unisia Jecs Corporation
    Inventors: Masao Sakamoto, Mitsumasa Iijima
  • Patent number: 5202388
    Abstract: A process for producing a hydrogenation product of ring-opening polymer by hydrogenating, in the presence of a hydrogenation catalyst, the non-aromatic carbon-to-carbon double bond present in a ring-opening polymer obtained by subjecting to ring-opening polymerization at least one norbornene derivative represented by general formula (I): ##STR1## wherein A and B independently represent hydrogen atoms or hydrocarbon groups having 1-10 carbon atoms, X and Y independently represent hydrogen atoms, halogen atoms or monovalent organic groups, and m is 0 or 1, alone or in combination with a monomer copolymerizable with said norbronene derivative, characterized by using, as the hydrogenation catalyst, a ruthenium compound represented by general formula (II):RuH.sub.k Q.sub.n T.sub.p Z.sub.q (11)wherein Q represents a halogen atom, T represents at least one atomic group selected from the group consisting of CO, NO and CH.sub.3 COCH.sub.2 COCH.sub.3, Z represents PR.sup.1 R.sup.2 R.sup.3 (R.sup.1, R.sub.2 and R.sup.
    Type: Grant
    Filed: November 29, 1991
    Date of Patent: April 13, 1993
    Assignee: Japan Synthetic Rubber Co., Ltd.
    Inventors: Akira Iio, Noboru Oshima, Yosihiro Ohira, Masao Sakamoto, Hiroshi Oka
  • Patent number: 4102218
    Abstract: In a fastening device for a tiltable steering mechanism having a stationary bracket mounted on the vehicle body structure and a movable bracket secured to a tubular housing and pivoted at its opposing arms to the stationary bracket for permitting angular adjustment of a tiltable steering shaft journalled within the tubular housing, a toothed portion is unitedly provided on one of the arms of the movable bracket and a latch member is pivoted to a portion of the stationary bracket to be engaged with the toothed portion in the locked position.
    Type: Grant
    Filed: June 3, 1977
    Date of Patent: July 25, 1978
    Assignee: Toyota Jidosha Kogyo Kabushiki Kaisha
    Inventors: Mitsuru Naka, Masao Sakamoto
  • Patent number: 4068541
    Abstract: A banjo-shaped axle casing including a differential housing and a pair of axle housings. The axle casing has at least a pair of mounting members disposed opposite each other on the inside surface of the axle casing. At least one pair of flexible partitions are inserted into the axle casing such that they engage with the mounting members and partition the axle housings from the differential housing.
    Type: Grant
    Filed: July 29, 1976
    Date of Patent: January 17, 1978
    Assignee: Toyota Jidosha Kogyo Kabushiki Kaisha
    Inventors: Masao Sakamoto, Ryoichi Okuda, Hitoshi Saito, Kenzi Sasazaki