The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 13, 2007
Filed:
Oct. 12, 2005
Akihiko Shiina, Kashihara, JP;
Yasuhiro Kamatani, Kitakaturagi-gun, JP;
Toshiaki Oya, Sakai, JP;
Ryouichi Tokioka, Yamatokoriyama, JP;
Kazuhiro Watanabe, Yamatokoriyama, JP;
Yoshimi Kotake, Kashiba, JP;
Hiroji Ueda, Tenri, JP;
Katsuyuki Oguchi, Kashiwara, JP;
Takashi Ohata, Kitakaturagi-gun, JP;
Osamu Sano, Kashihara, JP;
Masayoshi Ashitaka, Katuragi, JP;
Akihiko Shiina, Kashihara, JP;
Yasuhiro Kamatani, Kitakaturagi-gun, JP;
Toshiaki Oya, Sakai, JP;
Ryouichi Tokioka, Yamatokoriyama, JP;
Kazuhiro Watanabe, Yamatokoriyama, JP;
Yoshimi Kotake, Kashiba, JP;
Hiroji Ueda, Tenri, JP;
Katsuyuki Oguchi, Kashiwara, JP;
Takashi Ohata, Kitakaturagi-gun, JP;
Osamu Sano, Kashihara, JP;
Masayoshi Ashitaka, Katuragi, JP;
Koyo Seiko Co., Ltd., Osaka, JP;
Abstract
In a hydraulic power steering apparatus, when the relative rotation between input and output shafts which are connected by a torsion bar is converted into the relative rotation between an outer valve element and an inner valve element, the ratio of the relative rotation angle of the latter to the relative rotation angle of the former is varied in accordance with an operating condition of a vehicle. The hydraulic pressure to generate steering assist force is controlled in accordance with the relative rotation angles between both valve elements. The outer valve element is capable of relative coaxial rotation to the input and output shafts, and the inner valve element is formed integrally with the input shaft. A swinging member is supported by first, second and third supporting parts which respectively rotate together with the input shaft, the output shaft or the outer valve element. One of the first, second and third supporting parts is displaced in the axial direction by a certain distance in accordance with the operating condition of the vehicle.