Patents by Inventor Zhang Qicang

Zhang Qicang 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).

  • Portable plastic film wrapping system
    Patent number: 6742322
    Abstract: A portable plastic film wrapping system comprises a push-cart having a vertical mast member mounted thereon. A film roll carriage is vertically movable along the mast member, and the film roll carriage is operatively connected to a counterweight which is movably disposed within the mast member. The mast member is provided with a plurality of apertures, and a redundant dual stop pin assembly is engageable within particular ones of the mast member apertures so as to incrementally lockingly retain the film roll carriage at a particular elevations along the mast member such that safe controlled movement of the film roll carriage along the mast member is achieved.
    Type: Grant
    Filed: April 12, 2002
    Date of Patent: June 1, 2004
    Assignee: Illinois Tool Works Inc.
    Inventor: Zhang Qicang
  • Portable plastic film wrapping system
    Publication number: 20030192291
    Abstract: A portable plastic film wrapping system comprises a push-cart having a vertical mast member mounted thereon. A film roll carriage is vertically movable along the mast member, and the film roll carriage is operatively connected to a counterweight which is movably disposed within the mast member. The mast member is provided with a plurality of apertures, and a redundant dual stop pin assembly is engageable within particular ones of the mast member apertures so as to incrementally lockingly retain the film roll carriage at a particular elevations along the mast member such that safe controlled movement of the film roll carriage along the mast member is achieved.
    Type: Application
    Filed: April 12, 2002
    Publication date: October 16, 2003
    Applicant: ILLINOIS TOOL WORKS INC.
    Inventor: Zhang Qicang