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. 09, 1989
Filed:
Feb. 26, 1987
Hiromi Hasegawa, Obu, JP;
Toshiaki Ishiguro, Nagoya, JP;
Aisin Seiki Kabushiki Kaisha, Kariya, JP;
Abstract
A control circuit for a fluid coupling device with a high-gear clutch. The fluid coupling device includes a power chamber into which a working fluid is introduced for performing a transmission action, a clutch member arranged for connecting and disconnecting the input and output elements, a working chamber formed separately of the power chamber and a piston member forcibly displaced by a pressure differential between the working chamber and the power chamber for engaging or disengaging the clutch member. A fluid pressure source supplies working fluid to the interior of the power chamber and a high-gear clutch control valve supplies fluid to and discharges fluid from the working chamber for controlling the engagement and disengagement of the clutch. A control device, responsive to the supply and discharge of the working fluid to and from the working chamber by the high-gear clutch control unit, reduces a pressure internally of the power chamber to a hydraulic pressure proportionally to a throttle pressure from a throttle valve.