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:
Aug. 10, 2004
Filed:
Sep. 06, 2002
Komatsu Ltd., , JP;
Abstract
A fluid pressure control valve apparatus for a clutch or a brake which is small in size and capable of reducing occurrence of malfunction of a pressure control valve caused by dust caught therein is provided. For this purpose, a fluid pressure control valve apparatus ( ) for controlling a pressure of a fluid and feeding it to a clutch or a brake includes a pressure control valve ( ) for controlling fluid pressure, an electromagnetic proportional pilot operated valve ( ) for issuing an operation command for the pressure control valve with pilot pressure according to a command current to a proportional solenoid ( ), and a flow detecting valve ( ) for detecting a flow of the fluid to be fed to the clutch or the brake from the pressure control valve to detect completion of filling in the clutch or the brake.