Patents by Inventor Hirohumi Kikuchi

Hirohumi Kikuchi 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: 7044179
    Abstract: An elastic wheel includes a disk (1) secured to an axle hub, a rim (12) for mounting a tire, and an elastic member (10) arranged between the inner peripheral surface of the rim (12) and the outer peripheral surface of the disk (1). The elastic wheel is separable either between an outer peripheral surface portion (2) and a radial disk portion (3) of the disk (1), or between the inner peripheral surface of the rim (12) and the elastic member (10), or at both locations. This construction ensures long-lasting passenger comfort, anti-vibration performance and noise-suppression performance of the elastic wheel and allows optimization of these characteristics depending on applications of the wheel even during its use. The elastic wheel facilitates rim assembly as well as core mounting. Also, in cases where rubber is used to serve as the elastic member in the elastic wheel, vulcanization can be carried out without using an integrated rim unit, thereby making it possible to reduce the size of vulcanization apparatus.
    Type: Grant
    Filed: March 13, 2001
    Date of Patent: May 16, 2006
    Assignees: Bridgestone Corporation, Topy Industries, Limited
    Inventors: Katsumi Tashiro, Hirohumi Kikuchi
  • Patent number: 6981535
    Abstract: An elastic wheel includes a disk (1) having a base rim (2), a rim (3) for supporting a tire (10), and an annular elastic rubber body (4) arranged between the outer peripheral surface of the base rim (2) and the inner peripheral surface of the rim (3). A gap is formed between the elastic rubber body (4) and the outer peripheral surface of the base rim (2) or the inner peripheral surface of the rim (3). The elastic rubber body (4) with the gap has a spring constant that shifts from a smaller value to a larger value as the input load increases, so that it absorbs vibration under small input conditions while being prevented from undergoing substantial deformation under large input conditions. The elastic wheel ensures riding comfortablesess performance and provides improved vibrationproof performance and soundproof performance, regardless of whether the input load is small or large, without sacrificing durability and safety.
    Type: Grant
    Filed: August 1, 2000
    Date of Patent: January 3, 2006
    Assignees: Bridgestone Corporation, Topy Industries, Limited
    Inventors: Hirohumi Kikuchi, Katsumi Tashiro, Masanori Murase, Keiichiro Mizuno
  • Patent number: 6782930
    Abstract: An elastic wheel, comprising a disk (1) having a base rim (2) and a rim (3) pivotally supporting a tire (10), wherein a projected part (5) with a generally trapezoidal cross-section in the wheel axis direction is formed in a well of the rim (3), and a pair of elastic rubber bodies (6) are provided annually between the outer surfaces of a pair of wall parts (4a, 4b) formed by bending the both sides of the base rim (2) at a sharp angle and the rim inner peripheral surface of the generally trapezoidal projected part (5), whereby vibration can be absorbed by both the shearing deformation and compressive deformation of the installed elastic rubber bodies (6) so as to increase riding comfort, vibration proofing, and sound proofing performances in the area ranging from small input to large input, the sound proofing performance being very effective for sound in a high frequency area of 100 Hz or higher.
    Type: Grant
    Filed: June 21, 2002
    Date of Patent: August 31, 2004
    Assignee: Bridgestone Corporation
    Inventors: Hirohumi Kikuchi, Katsumi Tashiro, Masanori Murase
  • Patent number: 6732775
    Abstract: An elastic wheel having a disk 1 equipped with a base rim 2 and a rim 3 for supporting a tire includes a pair of guides 4 fixed annularly on the inner peripheral surface of the rim 3 and a pair of wall portions 5 fixed annularly on the both side areas in the axial direction of the wheel on the outer peripheral surface of the base rim 2, where rubber elastic bodies 6 are fitted annularly between the side surfaces of the guides 4 and the side surfaces of the wall portions, respectively. The elastic bodies 6 being installed are able to absorb vibrations by their shearing deformations, so that especially the riding comfortableness performance, the vibrationproof performance, and the soundproof performance can be improved against the small input load. Regarding the soundproof performance, furthermore, it is extremely effective on a high frequency area of 100 Hz or higher.
    Type: Grant
    Filed: February 4, 2002
    Date of Patent: May 11, 2004
    Assignee: Bridgestone Corporation
    Inventors: Hirohumi Kikuchi, Katsumi Tashiro, Masanori Murase, Keiichiro Mizuno
  • Publication number: 20030141642
    Abstract: An elastic wheel comprising a disk (1), a rim (3) supporting a tire (20), a pair of guides (4) annularly fixed on the inner periphery surface of the rim (3), a pair of walls (5) annularly fixed in two side areas along the wheel axial direction on the outer periphery surface of a base rim (2) disposed on the disk (1) or on the outer periphery surface of the disk (1), and rubber elastic bodies (6) each annularly interposed between the side faces of the guides (4) and the side faces of the walls (5), wherein at least one belt (8) is annularly arranged on each rubber elastic body (6). By virtue of the shear deformation of the installed rubber elastic bodies (6), it is possible to absorb vibration, particularly to improve a riding quality associated with a low input, and to improve a vibration prevention performance, a sound insulation performance and a steering stability. As for sound insulation performance, the elastic wheel is extremely effective for sound insulation in high frequency ranges of 100 Hz or more.
    Type: Application
    Filed: January 2, 2003
    Publication date: July 31, 2003
    Inventors: Tatsuro Uchida, Hirohumi Kikuchi, Katsumi Tashiro, Takeshi Suga
  • Publication number: 20030038527
    Abstract: An elastic wheel includes a disk (1) secured to an axle hub, a rim (12) for mounting a tire, and an elastic member (10) arranged between the inner peripheral surface of the rim (12) and the outer peripheral surface of the disk (1). The elastic wheel is separable either between an outer peripheral surface portion (2) and a radial disk portion (3) of the disk (1), or between the inner peripheral surface of the rim (12) and the elastic member (10), or at both locations. This construction ensures long-lasting passenger comfort, anti-vibration performance and noise-suppression performance of the elastic wheel and allows optimization of these characteristics depending on applications of the wheel even during its use. The elastic wheel facilitates rim assembly as well as core mounting. Also, in cases where rubber is used to serve as the elastic member in the elastic wheel, vulcanization can be carried out without using an integrated rim unit, thereby making it possible to reduce the size of vulcanization apparatus.
    Type: Application
    Filed: September 13, 2002
    Publication date: February 27, 2003
    Inventors: Katsumi Tashiro, Hirohumi Kikuchi
  • Publication number: 20020189731
    Abstract: An elastic wheel, comprising a disk (1) having a base rim (2) and a rim (3) pivotally supporting a tire (10), wherein a projected part (5) with a generally trapezoidal cross-section in the wheel axis direction is formed in a well of the rim (3), and a pair of elastic rubber bodies (6) are provided annually between the outer surfaces of a pair of wall parts (4a, 4b) formed by bending the both sides of the base rim (2) at a sharp angle and the rim inner peripheral surface of the generally trapezoidal projected part (5), whereby vibration can be absorbed by both the shearing deformation and compressive deformation of the installed elastic rubber bodies (6) so as to increase riding comfort, vibration proofing, and sound proofing performances in the area ranging from small input to large input, the sound proofing performance being very effective for sound in a high frequency area of 100 Hz or higher.
    Type: Application
    Filed: June 21, 2002
    Publication date: December 19, 2002
    Inventors: Hirohumi Kikuchi, Katsumi Tashiro, Masanori Murase