1
Taizo Fukutome, Atsushi Ishida, Akihiko Inooku, Noritoshi Takamura, Kaoru Hatayama, Yuichi Nagase, Toyoyuki Higashino, Hideo Yamamoto: Spring system. Honda Giken Kogyo Kabushiki Kaisha NHK Spring, Skjerven Morrill MacPherson Franklin & Friel, February 19, 1991: US04993376 (28 worldwide citation)

A spring system for applying a restoring force to a reciprocating member such as an exhaust or intake valve of an internal combustion engine, comprising: a helical spring having open ends and consisting of titanium or an alloy thereof; and a spring seat supporting one of the two ends of the helical ...


2
Noritoshi Takamura, Yuichi Nagase: Spring seat member with notch for ground spring end. NHK Spring, Baker & Daniels, September 21, 1993: US05246215 (27 worldwide citation)

A spring system for applying an elastic restoring force to a moveable member undergoing a reciprocating movement. This spring system includes a coil spring made of steel and having a moveable end engaged to a moveable member and a fixed end engaged to a fixed member. The moveable end is formed as an ...


3
Makoto Abe, Tetsuyuki Taniguchi, Tsuyoshi Kuriki, Noritoshi Takamura, Naoki Terakado, Kaoru Hatayama: High strength spring and its process of manufacturing. Nissan Motor, NHK Spring, Foley & Lardner Schwartz Jeffery Schwaab Mack Blumenthal & Evans, March 20, 1990: US04909866 (11 worldwide citation)

A high strength spring is made of steel of which composition consists of 0.6 to 0.7 wt % of C, 1.2 to 1.6 wt % of Si, 0.5 to 0.8 wt % of Mn, 0.5 to 0.8 wt % of Cr, 0.05 to 0.2 wt % in total of one or more than one of V, Mo, Nb and Ta and the balance of Fe and inevitable impurities. The steel is limi ...


4
Nobuhiko Ibaraki, Atushi Inada, Sumie Suda, Noritoshi Takamura, Satoru Tendoh, Tadayoshi Fujiwara, Tetsuo Jinbo: Steel wire rod for hard drawn spring, drawn wire rod for hard drawn spring and hard drawn spring, and method for producing hard drawn spring. Kabushiki Kaisha Kobe Seiko Sho, NHK Spring, Shinko Wire, Oblon Spivak McClelland Maier & Neustadt P C, July 11, 2006: US07074282 (7 worldwide citation)

Disclosed is a steel wire rod for hard-drawn springs capable of exhibiting fatigue strength and sag resistance equivalent to or higher than springs made of an oil-tempered wire. The steel wire rod contains carbon in a range from 0.5 to less than 0.7 mass %, silicon in a range from 1.4 to 2.5 mass %, ...


5
Hironobu Imaizumi, Noritoshi Takamura: Spring retainer and spring system. NHK Spring, Jordan and Hamburg, October 30, 2012: US08297603 (2 worldwide citation)

A spring retainer is made from an iron-based material to improve the strength and abrasion resistance of the spring retainer and reduce the thickness and weight thereof. The spring retainer includes a retainer body having a tapered support hole to be supported with a valve stem and a flange-like spr ...


6
Hiromu Izumida, Nozomu Kawabe, Shinei Takamura, Teruyuki Murai, Noritoshi Takamura: High-strength stainless steel spring and method of manufacturing the same. Sumitomo Electric, Sumitomo, NHK Spring, Osha • Liang, May 18, 2010: US07717411 (1 worldwide citation)

Provided is a high-strength stainless steel spring exhibiting a good workability and having a high load characteristic. Thus, the high-strength stainless steel spring of the invention has an chemical component containing 0.04 to 0.08% by mass of C, 0.15 to 0.22% by mass of N, 0.3 to 2.0% by mass of ...


7
Noritoshi Takamura, Hironobu Imaizumi: Spring retainer and spring system. NHK Spring, Jordan and Hamburg, August 16, 2011: US07997242 (1 worldwide citation)

A spring retainer can reduce the set height and mass of a coil spring. The spring retainer has a retainer body attached to a stem end of a valve and a circumferential plate-like spring part having an inner circumferential part supported by the retainer body and resiliently supporting an end of the v ...


8
Toshio Kazama, Noritoshi Takamura, Tomohiro Kawarabayashi: Lathe machining member. NHK Spring, Locke Lord, James E Armstrong IV, George N Chaclas, June 16, 2015: US09056355 (1 worldwide citation)

A cylindrical core portion, at least a part of which is made of a noble metal alloy and which has a diameter larger than a maximum diameter of a shape obtained by lathe machining, and a hollow-cylindrical peripheral portion, which is made of a material different from the material of the core portion ...


9
Sumie Suda, Nobuhiko Ibaraki, Noritoshi Takamura, Naoki Terakado, Satoru Tendo, Tadayoshi Fujiwara, Tetsuo Jinbo: Steel wire for high strength spring excellent in workability and high strength. Kabushiki Kaisha Kobe Seiko Sho, NHK Spring, Shinko Wire, Oblon Spivak McClelland Maier & Neustadt L, August 30, 2011: US08007716 (1 worldwide citation)

A steel wire has tempered martensite, comprises, as essential components, by mass, C: 0.53 to 0.68%; Si: 1.2 to 2.5%; Mn: 0.2 to 1.5%; Cr: 1.4 to 2.5%; Al: 0.05% or less; further comprises, as a selective component, Ni: 0.4% or less; V: 0.4% or less; Mo: 0.05 to 0.5%; or Nb: 0.05 to 0.5%; and furthe ...


10
Noritoshi Takamura, Tomokazu Kaibuki: Tensioner for applying tension to force transmitting member. NHK Spring, Frishauf Holtz Goodman & Chick P C, August 27, 2002: US06440021 (1 worldwide citation)

This tensioner comprises a casing, a first shaft member rotatably stored in the casing so as to be restrained from moving in its axial direction, a second shaft member in screwed engagement with the first shaft member, and a spring for applying a turning force to the first shaft member. The second s ...