Patents by Inventor QING-JUN QIAN

QING-JUN QIAN has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Pipe wrench
    Patent number: 9884409
    Abstract: A pipe wrench includes a fixed jaw with alternatively located first recesses and first driving faces defined in the inner side thereof. A pivotal member is pivotably connected to the fixed jaw and a resilient member is biased between the fixed jaw and the pivotal member. The pivotal member has alternatively located third recesses and second driving faces. A hexagonal space is defined between the first and second driving faces. The end portion of the pivotal member is inserted into a second recess defined in the inner side of the fixed jaw. The object is clamped in the hexagonal space, and the pivotal member can be pivoted away from the fixed jaw. The pipe wrench is able to quickly clamp and dismounted from the object.
    Type: Grant
    Filed: January 15, 2016
    Date of Patent: February 6, 2018
    Assignees: ZHE JIANG YIYANG TOOL MANUFACTURE CO., LTD
    Inventors: Chun-Wei Yang, Zhe-Ping Zhang, Qing-Jun Qian
  • PIPE WRENCH
    Publication number: 20170203417
    Abstract: A pipe wrench includes a fixed jaw with alternatively located first recesses and first driving faces defined in the inner side thereof. A pivotal member is pivotably connected to the fixed jaw and a resilient member is biased between the fixed jaw and the pivotal member. The pivotal member has alternatively located third recesses and second driving faces. A hexagonal space is defined between the first and second driving faces. The end portion of the pivotal member is inserted into a second recess defined in the inner side of the fixed jaw. The object is clamped in the hexagonal space, and the pivotal member can be pivoted away from the fixed jaw. The pipe wrench is able to quickly clamp and dismounted from the object.
    Type: Application
    Filed: January 15, 2016
    Publication date: July 20, 2017
    Inventors: CHUN-WEI YANG, ZHE-PING ZHANG, QING-JUN QIAN