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:
Jun. 05, 2012
Filed:
Jun. 19, 2007
Yoshiyuki Shimada, Tokyo, JP;
Tetsuya Yoshino, Tokyo, JP;
Nobuhiro Miki, Tokyo, JP;
Yuya Kanenawa, Tokyo, JP;
Yutaka Yokoyama, Tokyo, JP;
Takayasu Kitai, Tokyo, JP;
Yoshiyuki Shimada, Tokyo, JP;
Tetsuya Yoshino, Tokyo, JP;
Nobuhiro Miki, Tokyo, JP;
Yuya Kanenawa, Tokyo, JP;
Yutaka Yokoyama, Tokyo, JP;
Takayasu Kitai, Tokyo, JP;
Caterpillar S.A.R.L., Geneva, CH;
Abstract
The present invention is intended to provide a technology that can utilize the advantages of both a load sensing control and a regeneration circuit without causing any problem. A regeneration circuit is added to a hydraulic circuit provided with a hydraulic pressure signal line for detecting a hydraulic pressure value of a circuit and controlling a volume of hydraulic fluid to a cylinderwith reference to the detected value. A pressure reducing valvethat outputs a reduced pressure as an operating signal to a pump, and subsequently the controlling meanscauses the pressure reducing valveto output a pressure reduction command to a pumpand thus to reduce a discharge rate from the pump, when the regeneration circuit is in a regeneration state.