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:
Jan. 09, 2001
Filed:
Nov. 10, 1998
Komatsu, Ltd., Tokyo, JP;
Abstract
A pressurized hydraulic fluid supply apparatus capable of merging or separating a plurality of hydraulic pump lines according to the driving states of a plurality of actuators. The pressurized hydraulic fluid supply apparatus has a merge/separation valve,that merges or separates the hydraulic fluids delivered under pressure by the first hydraulic pump,and the second hydraulic pump,The merge/separation valve,is set to a flow separation state upon driving of the second hydraulic actuator,and is preferentially shifted to a flow merging state when the third hydraulic actuator,is driven. Hence, even when a manually driven operation valve is used, the merge/separation valve,is automatically switched between the flow separation state and the flow merging state according to the operation of the operation valve. This apparatus prevents an unintended flow rate difference between the first and second actuators from being produced upon driving of the third actuator.