Tadashi D Sakai

US Patent:

8214184, Jul 3, 2012

Filed:

Oct 19, 2007

Appl. No.:

11/875229

Inventors:

Shinichi Nishizawa - Novi MI, US
Tadashi Sakai - Novi MI, US

Assignee:

NHK International Corp. - Wixom MI

International Classification:

G06G 17/50
G06G 7/48
F16F 1/06

US Classification:

703 7, 703 1, 267166, 267175, 267180

Abstract:

A finite element analysis (FEA) based coil spring design method that utilizes a reverse engineering based concept. The method involves first designing a desired jounce profile, which is typically an output in the conventional FEA based design, and then reversely determining the corresponding free profile necessary for manufacturing a spring having desired performance specifications.

US Patent:

20110101630, May 5, 2011

Filed:

Nov 4, 2009

Appl. No.:

12/612026

Inventors:

Tadashi Sakai - Wixom MI, US
Shinichi Nishizawa - Walled Lake MI, US
Akitoshi Hamamoto - Bowling Green KY, US

International Classification:

B60G 21/055
B21D 31/00

US Classification:

280 5506, 72362, 280124107

Abstract:

A method of reducing peak stress and distributing stress experienced in bends of anti-roll bars that involves configuring the shape of the bends so that they do not have uniform radii of curvature. Generally the shapes of the bends have greater radii of curvature at central portions than other portions of the bends. Also the shapes of the bends may be symmetrical or non-symmetrical. According to one embodiment the shapes of the bends include a combination of curved and straight portions.