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. 30, 2024
Filed:
Oct. 15, 2019
Caterpillar Sarl, Geneva, CH;
Caterpillar SARL, Geneva, CH;
Abstract
To provide a drift-prevention valve device, a blade device, and a working machine capable of operating an actuated unit and preventing the machine body from drifting with a simple configuration. The drift-prevention valve device is provided with a non-return valvethat allows the flow of hydraulic oil from a control valveto a head chamberof a blade cylinderand blocks the flow of the hydraulic oil in the reverse direction; and a piston accommodation partseparately disposed from an accommodation partof the non-return valve, configured to movably accommodate a power piston. The power pistondefines a first piston chambercommunicating with a rod chamber ofof the blade cylinderand a second piston chamberfor drain positioned on a poppetside of the non-return valveand communicating with a tank. The power pistonis connected to the poppetof the non-return valve, so that the power pistoncan be operated by the difference between the urging force of the poppetby a springof the non-return valveand a rod chamber pressure of the blade cylinder