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:
May. 21, 1991
Filed:
Nov. 20, 1989
Applicant:
Inventors:
Kazunori Imamura, Fukuoka, JP;
Yoshikazu Hoshi, Ibaraki, JP;
Assignees:
Hitachi, Ltd., Tokyo, JP;
Hitachi Automotive Engineering Co., Ltd., Ibarabi, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F02D / ;
U.S. Cl.
CPC ...
123336 ; 123337 ;
Abstract
An apparatus for controlling a throttle valve comprises a motor for rotating a throttle valve so as to adjust the valve opening degree, a gearing disposed between the motor and the throttle valve for transmitting driving force of the motor to the throttle valve, and a return device serving to return the throttle valve to a regular set position thereof. The return device includes a tension spring.