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:
Sep. 08, 1998
Filed:
Feb. 13, 1997
Osamu Sato, Fujisawa, JP;
Kazuhiro Takatori, Yokohama, JP;
Nissan Motor Co., Ltd., Yokohama, JP;
Abstract
An automatic transmission has a friction element which induces a certain speed gear of the transmission when hydraulically operated. A fluid control circuit of the transmission comprises an accumulator valve unit which receives a line pressure for regulating a pressure of an operation fluid applied to the friction element in accordance with an engine load; and a shift valve which feeds the line pressure to the accumulator valve unit when assuming a first position and drains the operation fluid when assuming a second position. A flow restriction device is employed in the fluid control circuit for restricting the draining flow of the operation fluid.