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. 10, 2017
Filed:
Feb. 16, 2012
Xianxin Shi, Jiangsu, CN;
Xiaodong Xu, Jiangsu, CN;
Demei Kong, Jiangsu, CN;
Liangwei LU, Jiangsu, CN;
Xianxin Shi, Jiangsu, CN;
Xiaodong Xu, Jiangsu, CN;
Demei Kong, Jiangsu, CN;
Liangwei Lu, Jiangsu, CN;
Xuzhou Heavy Machinery Co., Ltd., Jiangsu, CN;
Abstract
A hydraulic control valve, a dual-cylinder extension system and an aerial work engineering machine. The control valve comprises a flow distributing and collecting valve, and control valve body is provided with a first oil opening, a second oil opening and a third oil opening. A first oil opening, a second oil opening and a third oil opening of said flow distributing and collecting valve are respectively communicated with the first oil opening, the second oil opening and the third oil opening of the valve body. The control valve has two working states, wherein, in the first working state, the oil path between the second oil opening and the third oil opening of the valve body is blocked; and in the second working state, the oil path between the second oil opening and the third oil opening of the valve body is opened.