Patents by Inventor Yasunobu Kawaguchi
Yasunobu Kawaguchi 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: 5846344Abstract: Disclosed is a spring steel for a high corrosion resistant and high strength, which exhibits an excellent drawability without softening heat treatment after hot rolling, and which has a strength of 1900 MPa or more by quenching and tempering and an excellent corrosion resistance. The spring steel contains elements of C, Si, Mn and Cr, and elements of Ni and/or Mo in suitable amounts, the balance being essentially Fe and inevitable impurities, wherein the elements satisfy the following requirement:2.5.ltoreq.(FP).ltoreq.4.52.0.ltoreq.(FP/log D).ltoreq.4.0where D is a diameter (mm) of the rolled material,and FP=(0.23?C!+0.1).times.(0.7?Si!+1).times.(3.5?Mn!+1) .times.(2.2?Cr!+1).times.(0.4?Ni!+1).times.(3?Mo!+1) in which ?element! represents mass % of the element.Type: GrantFiled: January 26, 1996Date of Patent: December 8, 1998Assignee: Kabushiki Kaisha Kobe Seiko ShoInventors: Yasunobu Kawaguchi, Masataka Shimotsusa, Kan Momozaki, Takenori Nakayama, Shigeaki Miyauchi, Yoshinori Yamamoto, Norio Ohkouchi
-
Patent number: 5508002Abstract: Disclosed is a spring steel for a high corrosion resistant and high strength, which exhibits an excellent drawability without softening heat treatment after hot rolling, and which has a strength of 1900 MPa or more by quenching and tempering and an excellent corrosion resistance. The spring steel contains elements of C, Si, Mn and Cr, and elements of Ni and/or Mo in suitable amounts, the balance being essentially Fe and inevitable impurities, wherein the elements satisfy the following requirement:2.5.ltoreq.(FP).ltoreq.4.52.0.ltoreq.(FP/log D).ltoreq.4.0where D is a diameter (mm) of the rolled material, and FP=(0.23[C]+0.1).times.(0.7[Si]+1).times.(3.5[Mn]+1).times.(2.2[Cr]+1).tim es.(0.4[Ni]+1).times.(3[Mo]+1) in which [element] represents mass % of the element.Type: GrantFiled: November 3, 1994Date of Patent: April 16, 1996Assignee: Kabushiki Kaisha Kobe Seiko ShoInventors: Yasunobu Kawaguchi, Masataka Shimotsusa, Kan Momozaki, Takenori Nakayama, Shigeaki Miyauchi, Yoshinori Yamamoto, Norio Ohkouchi
-
Patent number: 4983064Abstract: A fitting assembly having a ceramic piece fitted to a cup-shaped metal piece filled with solder. Through the use of the difference in thermal expansion coefficients of ceramics and certain metals, an assembly for properly gripping the ceramic by the metal cup is created.Type: GrantFiled: April 15, 1988Date of Patent: January 8, 1991Assignee: Honda Giken Kogyo Kabushiki KaishaInventors: Yasunobu Kawaguchi, Toshiaki Muto, Tatsuo Ichinokawa
-
Patent number: 4889567Abstract: Wire rods containing an adequate quantity of C within the range from 0.70 to 1.00%, Si from 0.5 to 3.0%, Mn from 0.30 to 2.0%, Cr from 0.10 to 0.5%, Al from 0.030 to 0.10% and N from 0.004 to 0.015% and unavoidable impurities, and with Fe for all the rest are subjected to re-heat patenting to increase the tensile strength to 135 kgf/mm.sup.2 or higher, then are drawn by adequately selecting the conditions, number of times of drawing in the range from 7 to 16 times, drawings speed from 50 to 550 m/minute, extent of drawing form 70-90, and water cooling immediately after each drawing to manufacture steel wires of high strength and high toughness.The wires are used as PC wires, steel wires for skewed bridge cables, steel stranded wires, spring wires, main cable wires for extra-long suspension bridge large diameter wires for core of aluminum cables steel reinforced (transmission cable), and as galvanized steel wires for such applications.Type: GrantFiled: July 1, 1988Date of Patent: December 26, 1989Assignees: Kabushiki Kaisha Kobe Seiko, Shinko Kosen Kogyo KabushikiInventors: Tadayoshi Fujiwara, Yukio Yamaoka, Kazuichi Hamada, Yoshiro Yamada, Yasunobu Kawaguchi, Yasuhiro Oki, Takashi Taniguchi, Hiroyuki Takahashi
-
Patent number: 4801106Abstract: A coil of tapered wire for forming coil springs, formed by winding substantially in concentric loops a quench-hardened and tempered tapered wire having a successive arrangement of tapered wire segments each consisting of a thick section, two thin sections and two tapered sections connecting the thin sections to the opposite ends of the thick section, respectively. The tapered wire is subjected to a preforming action immediately before being wound in loops on a winding drum, to form plastic bends in the thick sections and plastic bends of a radius of curvature greater than that of the plastic bends in the thick sections so that the tapered wire is wound in substantially uniform, concentric circular loops on a winding drum.Type: GrantFiled: July 16, 1987Date of Patent: January 31, 1989Assignee: Kabushiki Kaisha Kobe Seiko ShoInventors: Heijiro Kawakami, Yasunobu Kawaguchi, Kozo Katsube, Mamoru Murahashi, Susumu Takada
-
Patent number: 4800744Abstract: A tapered rod producing process by which a tapered rod having a profile very near to an aimed profile can be produced with high accuracy. According to the process, during working of a wire diameter gradually decreasing portion of a tapered rod in which the diameter of a stock gradually decreases in a feeding direction of the stock, the drawing length of the stock from starting to ending of acceleration of variable speed feeding mechanism is made greater than predetermined length of the wire diameter gradually decreasing portion, and during working of a wire diameter gradually increasing portion in which the diameter of the stock gradually increases, the drawing length of the stock from starting to completion of deceleration of the variable speed feeding mechanism is made smaller than an a desired length of the wire diameter gradually increasing portion of the tapered rod.Type: GrantFiled: July 15, 1987Date of Patent: January 31, 1989Assignee: Kabushiki Kaisha Kobe Seiko ShoInventors: Heijiro Kawakami, Yasunobu Kawaguchi, Kozo Katsube, Mamoru Murahashi, Susumu Takada
-
Patent number: 4747722Abstract: A metal-ceramic composite fitting assembly is described in which an effective connection between a boss on the ceramic member and the metal shaft member is achieved by providing the shaft with a sleeve formed of a material having a coefficient of thermal elongation comparable to that of the ceramic member, which sleeve is joined to the shaft member and cooperates with a recess therein to engage the boss along its length and to impose thereon compressive gripping forces that increase in magnitude along the length of the boss.Type: GrantFiled: December 19, 1985Date of Patent: May 31, 1988Assignee: Honda Giken Kogyo Kabushiki KaishaInventors: Yasunobu Kawaguchi, Toshiaki Muto, Tatsuo Ichinokawa
-
Patent number: 3938751Abstract: A device for continuously storing a length of wire to cause it to remain wound for a predetermined period of time found necessary for treatment thereof, wherein two winding drums are provided upon which the wire is wound in series, leaving an intermediate slackened wire portion therebetween, and the ratio of the rotational speed of the two drums is controlled so as to maintain a constant storing amount of the wire or, preferably, to maintain the intermediate slackened portion of the wire constant.Type: GrantFiled: December 21, 1973Date of Patent: February 17, 1976Inventors: Heijiro Kawakami, Yasunobu Kawaguchi, Hazime Fukinbara