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:
Mar. 08, 1994
Filed:
Nov. 18, 1992
Yuji Kashihara, Toyota, JP;
Shinya Nakamura, Owariasahi, JP;
Toyota Jidosha Kabushiki Kaisha, Toyota, JP;
Abstract
Apparatus including a pressure regulating valve for regulating line pressure for hydraulically operated frictional coupling devices of a vehicle automatic transmission, and a cut-back valve for causing the pressure regulating valve to raise the line pressure to a higher level when the transmission is placed in first-speed position, than the normal level established when the transmission is placed in any higher-gear position whose speed reduction ratio is lower than that of the first-speed position. A pressure applying device is provided to apply to the cut-back valve first and second pressures to be applied to respective two coupling devices to establish a higher-gear position of the transmission, to operate the cut-back valve for causing the pressure regulating valve to raise the line pressure to the higher level when the vehicle is started in a high-gear start mode with the transmission placed in the higher-gear position.