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:
Oct. 25, 2011
Filed:
Nov. 08, 2005
Takeharu Matsuzaki, Kariya, JP;
Shigeto Nakajima, Nagano, JP;
Takeharu Matsuzaki, Kariya, JP;
Shigeto Nakajima, Nagano, JP;
Kabushiki Kaisha Toyota Jidoshokki, Aichi-ken, JP;
Nishina Industrial Co., Ltd., Nagano-ken, JP;
Abstract
A hydraulic control apparatusincludes a switch valve, an adjustment valve, and a valve control device. The adjustment valvehas a fluid chamber, a valve body, and a back pressure chamber. A restrictor is formed between the valve bodyand a wall defining the fluid chamberand connects the cylinder lineto the switch valve line. The opening degree of the restrictor changes in correspondence with movement of the valve body. When the switch valveis located at a neutral position or a supply position, the valve control deviceapplies the fluid pressure in the cylinder lineto the back pressure chamber. When the switch valveis located at a drainage position, the valve control deviceapplies a pilot pressure lower than the fluid pressure in the cylinder lineto the back pressure chamber