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:
Jan. 18, 1983
Filed:
Oct. 04, 1979
Applicant:
Inventors:
Kiyohumi Mizuno, Nagoya, JP;
Hiroaki Maeda, Toyota, JP;
Shigeo Takahashi, Chiryu, JP;
Tsukasa Watanabe, Toyota, JP;
Assignee:
Aisin Seiki Kabushiki Kaisha, Aichi, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B60K / ; F16H / ;
U.S. Cl.
CPC ...
74868 ; 74869 ; 74687 ;
Abstract
In a hydromechanical transmission, low and high speed drive power trains are selectively completed in response to variation of the speed ratio between an input shaft and an output shaft. The transmission comprises a speed ratio detecting valve for detecting lower and higher limits of a predetermined speed ratio and a clutch control valve for conducting the switch over between the low and high speed drive power trains when the actual speed ratio reaches a range defined by the lower and higher limits of the predetermined speed ratio.