Patents by Inventor Zhi-Ji Chen

Zhi-Ji Chen 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).

  • Patent number: 9248556
    Abstract: A positioning device for a ratchet wrench contains: a driving head connecting with an operating handle and including an accommodating cavity, a toothed groove, and a slot, a depth of which is equal to the accommodating cavity. The driving head also includes an orifice and a horizontal notch, a depth of the horizontal notch is equal to the slot. The positioning device contains a rotatory block fixed in the driving head and including a first toothed section and a second toothed section; an abutting member fixed in the slot and including an elastic steel ball, plural locking teeth, an aperture, and a resilient element; a pushing post fixed in the horizontal notch of the driving head and including a peripheral recess, wherein one end of the pushing post is screwed with a screwing element; a cover locked on the driving head to cover the abutting member and the pushing post.
    Type: Grant
    Filed: July 8, 2014
    Date of Patent: February 2, 2016
    Inventor: Zhi-Ji Chen
  • Publication number: 20160008960
    Abstract: A positioning device for a ratchet wrench contains: a driving head connecting with an operating handle and including an accommodating cavity, a toothed groove, and a slot, a depth of which is equal to the accommodating cavity. The driving head also includes an orifice and a horizontal notch, a depth of the horizontal notch is equal to the slot. The positioning device contains a rotatory block fixed in the driving head and including a first toothed section and a second toothed section; an abutting member fixed in the slot and including an elastic steel ball, plural locking teeth, an aperture, and a resilient element; a pushing post fixed in the horizontal notch of the driving head and including a peripheral recess, wherein one end of the pushing post is screwed with a screwing element; a cover locked on the driving head to cover the abutting member and the pushing post.
    Type: Application
    Filed: July 8, 2014
    Publication date: January 14, 2016
    Inventor: Zhi-Ji Chen
  • Patent number: 9180578
    Abstract: A sleeve structure contains a body. The body includes an outer sleeve, the outer sleeve has a first fitting groove defined therein and an elongated slot formed on an outer peripheral wall thereof and communicating with the first fitting groove. The first fitting groove has a resilient element and an inner sleeve which are disposed in the first fitting groove, wherein a bottom end of the resilient element abuts against a bottom end of the first fitting groove. The inner sleeve has a second fitting groove defined therein and an orifice arranged on an outer peripheral wall thereof. The elongated slot has a connecting post inserted therein, and the connecting post connects with a driving block by ways of a coupling shaft, wherein the driving bock has a shoulder formed on at least one corner of a bottom end thereof.
    Type: Grant
    Filed: August 26, 2013
    Date of Patent: November 10, 2015
    Inventor: Zhi-Ji Chen
  • Publication number: 20150053052
    Abstract: A sleeve structure contains a body. The body includes an outer sleeve, the outer sleeve has a first fitting groove defined therein and an elongated slot formed on an outer peripheral wall thereof and communicating with the first fitting groove. The first fitting groove has a resilient element and an inner sleeve which are disposed in the first fitting groove, wherein a bottom end of the resilient element abuts against a bottom end of the first fitting groove. The inner sleeve has a second fitting groove defined therein and an orifice arranged on an outer peripheral wall thereof. The elongated slot has a connecting post inserted therein, and the connecting post connects with a driving block by ways of a coupling shaft, wherein the driving bock has a shoulder formed on at least one corner of a bottom end thereof.
    Type: Application
    Filed: August 26, 2013
    Publication date: February 26, 2015
    Inventor: Zhi-Ji Chen
  • Patent number: D675894
    Type: Grant
    Filed: April 6, 2012
    Date of Patent: February 12, 2013
    Inventor: Zhi-Ji Chen