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, 2018
Filed:
Jun. 21, 2011
Xiaogang Yi, Hunan, CN;
Yongdong Liu, Hunan, CN;
Bingbing Chen, Hunan, CN;
HUNAN SANY INTELLIGENT CONTROL EQUIPMENT CO., LTD., Changsha, Hunan, CN;
SANY HEAVY INDUSTRY CO., LTD., Changsha, Hunan, CN;
Abstract
The present application discloses a hydraulic oil cylinder, of which a piston rod () is provided with at least two cushion collars () which are axially slidable along the piston rod (). Axial throttle oil channels () are provided between the cushion collars () and a piston (). A first cushion collar () is provided with a sealing end face (), and an end cover of a rod cavity () is provided with a sealing end face (). The sealing end face () of the first cushion collar contacts with the sealing end face () of the end cover of the rod cavity to form a seal. Hydraulic oil within the rod cavity is discharged through one axial throttle oil channel () to an oil passage B.