Rock fixing device with hydraulic-spring combination and position-limiting chuck for direct tensile test

US9714891B2 · kind B2 · utility

Inventors

• Jianfeng Liu · Chengdu, CN
• Heping Xie · Sichuan, CN
• Yang Ju · Chengdu, CN
• Huining Xu · Chengdu, CN
• Lu Wang · Chengdu, CN
• Yangmengdi Xu · Chengdu, CN
• Hang Zou · Chengdu, CN
• Zhiwei Zhou · Kunshan, CN
• Yue Zhuo · Champaign, US

Key dates

• Filing date: Feb 4, 2016
• Grant date: Jul 25, 2017
• Expiry date: Feb 4, 2036

Classification

• Technology area (CPC G): Physics
• CPC primary: G01N2203/0447
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A device for fixing a rock sample, including: a lower clamp and an upper clamp; the lower clamp including a lower connector connected to a loading base at a bottom of a testing machine, a lower end cap for fixing samples, a lower chain connecting the lower connector and the lower end cap, a first spiral spring, a first central position-limit mechanism, a second central position-limit mechanism, and a first hydraulic mechanism; the upper clamp including an upper connector connected to a loading base at a top of the testing machine, an upper end cap for fixing samples, an upper chain connecting the upper connector and the upper end cap, a second spiral spring, a third central position-limit mechanism, a fourth central position-limit mechanism, and a second hydraulic mechanism.