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:
Nov. 22, 2011
Filed:
Mar. 28, 2007
Masayuki Nishida, Tokyo, JP;
Masayuki Nishida, Tokyo, JP;
Fuji Jukogyo Kabushiki Kaisha, Tokyo, JP;
Abstract
Safety as well as the minimum driving performance is secured by preventing abrupt down-shifting if a line pressure valve or a primary pressure control valve fails. A line pressure path connected to an oil pump is connected with a line pressure control valve. A first primary pressure path branched from the line pressure path is connected with a hydraulic fluid chamber through a fail-safe valve, and a secondary pressure path branched from the line pressure path is connected to a hydraulic fluid chamber. The line pressure control valve is connected with a second primary pressure path in communication with a hydraulic fluid chamber, and this secondary primary pressure path is provided with a primary pressure control valve and a limiter valve. When the line pressure control valve and the primary pressure control valve fail and excess line pressure or primary pressure is output, the pressure in the hydraulic fluid chamber is reduced by the fail-safe valve, so that the pressure in the hydraulic fluid chamber is reduced by the limiter valve.