Patents by Inventor Chih-Jen Wang

Chih-Jen Wang 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).

  • Publication number: 20190350367
    Abstract: A backrest height adjusting device includes a fixing seat fixed in relation to a chair seat and having at least one fixing post. A backrest includes at least one coupling sleeve coupled with the at least one fixing post. At least one gear is rotatably mounted to the fixing block fixed on the backrest and is coupled with a plurality of positioning grooves on the at least one fixing post. An elastic element biases a movable block to move relative to the fixing block in a vertical direction and biases the movable block to mesh with the at least one gear to retain the backrest in a selected height relative to the fixing seat. The movable block is actuatable to disengage from the plurality of teeth of the at least one gear to thereby permit the backrest to move in the vertical direction relative to the fixing seat.
    Type: Application
    Filed: May 17, 2018
    Publication date: November 21, 2019
    Inventor: Chih-Jen Wang
  • Patent number: 10455946
    Abstract: A backrest height adjusting device includes a fixing seat fixed in relation to a chair seat and having at least one fixing post. A backrest includes at least one coupling sleeve coupled with the at least one fixing post. At least one gear is rotatably mounted to the fixing block fixed on the backrest and is coupled with a plurality of positioning grooves on the at least one fixing post. An elastic element biases a movable block to move relative to the fixing block in a vertical direction and biases the movable block to mesh with the at least one gear to retain the backrest in a selected height relative to the fixing seat. The movable block is actuatable to disengage from the plurality of teeth of the at least one gear to thereby permit the backrest to move in the vertical direction relative to the fixing seat.
    Type: Grant
    Filed: May 17, 2018
    Date of Patent: October 29, 2019
    Inventor: Chih-Jen Wang
  • Patent number: 7052440
    Abstract: A dual-function exercise device includes lower body exercise device, a frame, and a movable handle assembly. The movable handle assembly includes two independent pulling devices and a rotary shaft journalled on the frame. Each pulling device includes a pulley disposed rotatably on the frame, a pull cord wound on the pulley, a handgrip fastened to an end of the cord and movable to unwind the cord from the pulley, and a biasing unit for biasing the cord to wind around the pulley when the cord is pulled and is subsequently released.
    Type: Grant
    Filed: June 24, 2003
    Date of Patent: May 30, 2006
    Assignee: Johnson Health Tech Co., Ltd.
    Inventors: Nathan Pyles, Derek Nelson, Chih-Jen Wang, Hung-Mao Liao
  • Publication number: 20050101447
    Abstract: A dual-function exercise device includes lower body exercise device, a frame, and a movable handle assembly. The movable handle assembly includes two independent pulling devices and a rotary shaft journalled on the frame. Each pulling device includes a pulley disposed rotatably on the frame, a pull cord wound on the pulley, a handgrip fastened to an end of the cord and movable to unwind the cord from the pulley, and a biasing unit for biasing the cord to wind around the pulley when the cord is pulled and is subsequently released.
    Type: Application
    Filed: June 24, 2003
    Publication date: May 12, 2005
    Inventors: Nathan Pyles, Derek Nelson, Kun-Chuan Lo, Chih-Jen Wang
  • Publication number: 20040102292
    Abstract: A dual-function treading exerciser includes a treading platform, an upright frame, and a movable handle assembly. The frame includes an upright frame body and two fixed handles connected fixedly to an upper portion of the frame body. The movable handle assembly includes two pulling devices and a rotary shaft journalled on the frame. Each pulling device includes a housing with a receiving chamber, a pulley disposed rotatably in the chamber, a pull cord wound on the pulley, a handgrip fastened to an end of the cord and movable rearwardly to unwind the cord from the pulley, and a biasing unit for biasing the cord to wind around the pulley when the cord is pulled rearwardly and is subsequently released.
    Type: Application
    Filed: June 24, 2003
    Publication date: May 27, 2004
    Inventors: Nathan Pyles, Derek Nelson, Kun-Chuan Lo, Chih-Jen Wang