Patents by Inventor Changxi Dai

Changxi Dai 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: 9321154
    Abstract: A through-hole type power ratchet wrench includes a socket bracket, a swingable member, a ratchet socket, first and second pawls, and first and second resilient elements. The swingable member is disposed in the socket bracket and adjacent to an outer surface of the ratchet socket. The pawls are swingably fixed on the swingable member. The pawls, biased by the respective resilient elements, tend to engage with the outer surface of the ratchet socket. The wrench also includes a limiting member configured to isolate one of the first and second pawls from the ratchet socket. The limiting member is formed with an opening adapted for allowing one of the pawls to pass therethrough, and the limiting member is moveable about the ratchet socket between first and second positions. The opening of the limiting member faces towards the first pawl and second pawls when at the first and second positions, respectively.
    Type: Grant
    Filed: March 6, 2014
    Date of Patent: April 26, 2016
    Assignee: CHERVON (HK) LIMITED
    Inventors: Liang Chen, Changxi Dai, Junliu Zhang
  • Publication number: 20140260835
    Abstract: A through-hole type power ratchet wrench includes a socket bracket, a swingable member, a ratchet socket, first and second pawls, and first and second resilient elements. The swingable member is disposed in the socket bracket and adjacent to an outer surface of the ratchet socket. The pawls are swingably fixed on the swingable member. The pawls, biased by the respective resilient elements, tend to engage with the outer surface of the ratchet socket. The wrench also includes a limiting member configured to isolate one of the first and second pawls from the ratchet socket. The limiting member is formed with an opening adapted for allowing one of the pawls to pass therethrough, and the limiting member is moveable about the ratchet socket between first and second positions. The opening of the limiting member faces towards the first pawl and second pawls when at the first and second positions, respectively.
    Type: Application
    Filed: March 6, 2014
    Publication date: September 18, 2014
    Applicant: CHERVON (HK) LIMITED
    Inventors: Liang Chen, Changxi Dai, Junliu Zhang
  • Publication number: 20110155404
    Abstract: A hand-held electric tool having a housing, a machine core, and a working head disposed on the housing is further provided with a manual hammer component. The manual hammer component is usable to manually strike an object, such as a nail. The working head is disposed at one side of the front end of the housing and the manual hammer component is disposed at the other side of the front end of the housing and opposite to the working head.
    Type: Application
    Filed: December 17, 2010
    Publication date: June 30, 2011
    Applicant: CHERVON LIMITED
    Inventor: Changxi Dai
  • Publication number: 20100308547
    Abstract: A power tool, which includes a handle portion and a housing; a chuck disposed in front of the housing, and the chuck that is selectively operated in one of a working mode and a chucking mode. The power tool further includes a driving device which drives the chuck to axially move between a first position and a second position.
    Type: Application
    Filed: May 28, 2010
    Publication date: December 9, 2010
    Applicant: CHERVON LIMITED
    Inventors: Masatoshi Fukinuki, Changxi Dai