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.

Date of Patent:
Jan. 04, 1977

Filed:

Aug. 06, 1975
Applicant:
Inventors:

Masao Nishikawa, Niiza, JA;

Yoshihiko Toshimitsu, Asaka, JA;

Takashi Aoki, Asaka, JA;

Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B62D / ;
U.S. Cl.
CPC ...
180143 ; 91434 ;
Abstract

Power steering apparatus comprising a displaceable changeover value operated in one direction or the other by turning of a steering shaft so that an oil supply passage connected to an oil pressure pump is placed into communication with either a right chamber or a left chamber of a power cylinder. At least one external oil pressure reaction chamber is arranged to be reduced in volume by the operation in either direction of the changeover valve, the oil pressure reaction chamber being in communication through a first throttle with the oil supply passage and through a second throttle with an exterior oil tank. At least one of the two throttles is variable in size in proportion to vehicle speed so that the ratio of the area of opening of the first throttle relative to the second throttle can be increased according to increase of vehicle speed.


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