Patents by Inventor Hiroyuki Nakajima

Hiroyuki Nakajima 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: 4865796
    Abstract: A novel method of producing molding members for automobiles, formed at least partly of a synthetic resin material is disclosed. According to the method of the invention, synthetic resin material is extrusion molded into a continuous body with a substantially constant cross-section throughout the entire length thereof. A controlled amount of the material is removed from the predetermined location of the continuous body, synchronously with the extrusion molding of the material, such that the cross-section of the continuous body varies in the longitudinal direction of the body. The continuous body subjected to the controlled removal of the material is then cut into the predetermined length of the molding member.
    Type: Grant
    Filed: April 13, 1988
    Date of Patent: September 12, 1989
    Assignee: Hashimoto Forming Industry Co., Ltd.
    Inventors: Tatsuya Tamura, Nobuo Igarashi, Sadao Konno, Hiroyuki Nakajima
  • Patent number: 4652619
    Abstract: An epoxy impregnating resin composition comprising 100 parts by weight of a compound having at least two epoxy groups in one molecule, from 0.1 to 100 parts by weight of an allyl epoxy compound having both allyl and epoxy groups in one molecule and represented by the general formula: ##STR1## where R is hydrogen, halogen or a monovalent organic group, from 30 to 300 parts by weight of a liquid cyclic acid anhydride, and from 5 to 300 parts by weight of a compound having a polymerizable double bond.
    Type: Grant
    Filed: June 5, 1984
    Date of Patent: March 24, 1987
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Hiroyuki Nakajima, Fumiyuki Miyamoto, Masakazu Murayama, Eiki Jidai
  • Patent number: 4603180
    Abstract: A thermosetting resin composition, consists essentially of:(a) 100 parts by weight of a mixture of liquid acid anhydride and an imide ring-containing epoxy compound obtained from reaction of an epoxy compound having in one molecule thereof at least two epoxy groups and either one or both of imide ring-containing dicarboxylic acid compounds represented by the following general formulae (I) and (II): ##STR1## (where: R.sub.1 is a divalent organic radical) ##STR2## (where: R.sub.2 is a divalent organic radical): (b) 5 to 200 parts by weight of a tri-functional vinyl monomer; and(c) 0.1 to 10 parts by weight of phenoxy resin.
    Type: Grant
    Filed: June 18, 1985
    Date of Patent: July 29, 1986
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Hiroyuki Nakajima, Fumiyuki Miyamoto, Masakazu Murayama, Seiji Oka, Eiki Jidai
  • Patent number: 4591623
    Abstract: A thermosetting resin composition, which is characterized by mixing 5 to 300 parts by weight of tri-functional vinyl monomer and 0.1 to 10 parts by weight of phenoxy resin with respect to 100 parts by weight in total of an epoxy compound containing in its molecule at least two epoxy groups and a curing agent for said epoxy compound.
    Type: Grant
    Filed: June 12, 1985
    Date of Patent: May 27, 1986
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Hiroyuki Nakajima, Fumiyuki Miyamoto, Masakazu Murayama, Seiji Oka, Eiki Jidai
  • Patent number: 4212959
    Abstract: A heat resistant resin composition comprises 100 wt. parts of a mixture [I] and 0 to 10 wt. parts of a phenoxy resin [II] wherein the mixture [I] comprises 80 to 5 wt. parts of (a) a mixture of 0 to 95 wt. parts of the first maleimide compound obtained by reacting an aromatic amine with maleic anhydride and/or a maleic anhydride derivative and 100 to 5 wt. parts of the second maleimide obtained by reacting an aromatic amine with a cyclic acid anhydride having no unsaturated double bond and maleic anhydride and/or a maleic anhydride derivative and 20 to 95 wt. parts of (b) and epoxy resin.
    Type: Grant
    Filed: May 9, 1978
    Date of Patent: July 15, 1980
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Akira Fukami, Hiroyuki Nakajima
  • Patent number: 4157552
    Abstract: A pen holding device has a pen or pens slidable in a pen holder which is fixed removably to a drafting head frame. The pens are moved up and down by actuating means mounted on the drafting head frame, for drafting and mooring. The engagement of the actuating means to the pens are very easily released by a single releasing mechanism for easy and quick exchange of the pens.
    Type: Grant
    Filed: May 27, 1977
    Date of Patent: June 5, 1979
    Assignee: Kabushiki Kaisha Daini Seikosha
    Inventor: Hiroyuki Nakajima
  • Patent number: 4114648
    Abstract: A double acting electromagnetic valve is composed of a tubular main body internally having a valve chamber, a pair of magnetic cores each having a concentric polar arrangement thereby to provide an E-shaped axial section, secured respectively on both sides of the main body, the cores being made of a magnetic material exhibiting high residual magnetism, a magnetic member slidably received in the valve chamber, two coils each encased in an annular recess formed between the central pole leg and the circumferential pole leg of the magnetic core, fluid passages provided through the central pole legs of the magnetic cores, a valve seat formed at an end of each fluid passage exposed to the valve chamber, and valve means provided on the slidable magnetic member to abut against the valve seats.
    Type: Grant
    Filed: December 29, 1975
    Date of Patent: September 19, 1978
    Assignee: Konan Electric Co., Ltd.
    Inventors: Hiroyuki Nakajima, Takashi Hosokawa
  • Patent number: 4076045
    Abstract: A solenoid operated valve has a valve body forming a chamber provided with a valve seat at its center. A fluid port communicating to an aperture formed in the center of said valve seat and another fluid port communicating to said valve chamber through a passage. An electromagnet body of a ring shaped cross section is mounted to the valve body from above overlying the valve chamber. The electromagnet body is divided by a central yoke and an outer enclosure formed with an outer yoke at its end facing said valve chamber. The lower ends of said central yoke and that of said outer yoke have tightly fit therebetween a lower flange of a solenoid coil bobbin of inserted in the coil chamber, formed thereby and seals off the valve chamber from the coil chamber.
    Type: Grant
    Filed: July 30, 1976
    Date of Patent: February 28, 1978
    Assignees: Konan Electric Co., Ltd., Takashi Hosokawa
    Inventors: Hiroyuki Nakajima, Takashi Hosokawa
  • Patent number: 3952579
    Abstract: In a device for measuring blood sedimentation rate automatically, a light-sensitive paper sheet is disposed so as to be movable relative to a blood sedimentation measuring tube, such as Westergren tube; a slit is provided between the light-sensitive paper and the measuring tube; and lamp means are provided on one side of the measuring tube opposite to the slit. Thus, the shade of the sedimented red blood corpuscles in the measuring tube formed as the light pulses from the lamp means passes through the measuring tube is projected on the light-sensitive paper through the slit with the feed of the paper and light pulses occurring in exact synchronism, and the rate of the blood sedimentation can be automatically recorded on the paper.
    Type: Grant
    Filed: July 1, 1974
    Date of Patent: April 27, 1976
    Assignee: Konan Electric Co., Ltd.
    Inventor: Hiroyuki Nakajima