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:
Nov. 30, 1999
Filed:
Apr. 24, 1998
Kazuharu Tajima, Hiroshima, JP;
Kabushiki Kaisha Kobe Seiko Sho, Kobe, JP;
Abstract
A hydraulic control system in a construction machine is provided with a hydraulic pump delivering hydraulic oil, a directional control valve controlling flow of the hydraulic oil, an actuator driven by the hydraulic oil outputted from the directional control valve, and a tank into which the hydraulic oil delivered from the hydraulic pump is bleeded. A cut-off valve controlling flow of the bleeded hydraulic oil is arranged between the directional control valve and the tank. Transient characteristics are added to a signal controlling the cut-off valve so that variation of the signal is suppressed to be small. Transient characteristics are added also to a signal controlling the hydraulic pump so that variation of the signal is suppressed to be small. Thereby the construction machine can travel smoothly.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile